valueIterator() {
return new ValueIterator(this);
}
/**
* ECMA 8.10.1 IsAccessorDescriptor ( Desc )
* @return true if this has a {@link AccessorPropertyDescriptor} with a getter or a setter
*/
public final boolean isAccessorDescriptor() {
return has(GET) || has(SET);
}
/**
* ECMA 8.10.2 IsDataDescriptor ( Desc )
* @return true if this has a {@link DataPropertyDescriptor}, i.e. the object has a property value and is writable
*/
public final boolean isDataDescriptor() {
return has(VALUE) || has(WRITABLE);
}
/**
* ECMA 8.10.3 IsGenericDescriptor ( Desc )
* @return true if this has a descriptor describing an {@link AccessorPropertyDescriptor} or {@link DataPropertyDescriptor}
*/
public final boolean isGenericDescriptor() {
return isAccessorDescriptor() || isDataDescriptor();
}
/**
* ECMA 8.10.5 ToPropertyDescriptor ( Obj )
*
* @return property descriptor
*/
public final PropertyDescriptor toPropertyDescriptor() {
final Global global = Context.getGlobal();
final PropertyDescriptor desc;
if (isDataDescriptor()) {
if (has(SET) || has(GET)) {
throw typeError(global, "inconsistent.property.descriptor");
}
desc = global.newDataDescriptor(UNDEFINED, false, false, false);
} else if (isAccessorDescriptor()) {
if (has(VALUE) || has(WRITABLE)) {
throw typeError(global, "inconsistent.property.descriptor");
}
desc = global.newAccessorDescriptor(UNDEFINED, UNDEFINED, false, false);
} else {
desc = global.newGenericDescriptor(false, false);
}
return desc.fillFrom(this);
}
/**
* ECMA 8.10.5 ToPropertyDescriptor ( Obj )
*
* @param global global scope object
* @param obj object to create property descriptor from
*
* @return property descriptor
*/
public static PropertyDescriptor toPropertyDescriptor(final Global global, final Object obj) {
if (obj instanceof ScriptObject) {
return ((ScriptObject)obj).toPropertyDescriptor();
}
throw typeError(global, "not.an.object", ScriptRuntime.safeToString(obj));
}
/**
* ECMA 8.12.1 [[GetOwnProperty]] (P)
*
* @param key property key
*
* @return Returns the Property Descriptor of the named own property of this
* object, or undefined if absent.
*/
public Object getOwnPropertyDescriptor(final String key) {
final Property property = getMap().findProperty(key);
final Global global = Context.getGlobal();
if (property != null) {
final ScriptFunction get = property.getGetterFunction(this);
final ScriptFunction set = property.getSetterFunction(this);
final boolean configurable = property.isConfigurable();
final boolean enumerable = property.isEnumerable();
final boolean writable = property.isWritable();
if (property instanceof UserAccessorProperty) {
return global.newAccessorDescriptor(
(get != null) ?
get :
UNDEFINED,
(set != null) ?
set :
UNDEFINED,
configurable,
enumerable);
}
return global.newDataDescriptor(getWithProperty(property), configurable, enumerable, writable);
}
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getDescriptor(global, index);
}
return UNDEFINED;
}
/**
* ECMA 8.12.2 [[GetProperty]] (P)
*
* @param key property key
*
* @return Returns the fully populated Property Descriptor of the named property
* of this object, or undefined if absent.
*/
public Object getPropertyDescriptor(final String key) {
final Object res = getOwnPropertyDescriptor(key);
if (res != UNDEFINED) {
return res;
} else if (getProto() != null) {
return getProto().getOwnPropertyDescriptor(key);
} else {
return UNDEFINED;
}
}
/**
* ECMA 8.12.9 [[DefineOwnProperty]] (P, Desc, Throw)
*
* @param key the property key
* @param propertyDesc the property descriptor
* @param reject is the property extensible - true means new definitions are rejected
*
* @return true if property was successfully defined
*/
public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) {
final Global global = Context.getGlobal();
final PropertyDescriptor desc = toPropertyDescriptor(global, propertyDesc);
final Object current = getOwnPropertyDescriptor(key);
final String name = JSType.toString(key);
if (current == UNDEFINED) {
if (isExtensible()) {
// add a new own property
addOwnProperty(key, desc);
return true;
}
// new property added to non-extensible object
if (reject) {
throw typeError(global, "object.non.extensible", name, ScriptRuntime.safeToString(this));
}
return false;
}
// modifying an existing property
final PropertyDescriptor currentDesc = (PropertyDescriptor) current;
final PropertyDescriptor newDesc = desc;
if (newDesc.type() == PropertyDescriptor.GENERIC &&
! newDesc.has(CONFIGURABLE) && ! newDesc.has(ENUMERABLE)) {
// every descriptor field is absent
return true;
}
if (newDesc.hasAndEquals(currentDesc)) {
// every descriptor field of the new is same as the current
return true;
}
if (! currentDesc.isConfigurable()) {
if (newDesc.has(CONFIGURABLE) && newDesc.isConfigurable()) {
// not configurable can not be made configurable
if (reject) {
throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
}
return false;
}
if (newDesc.has(ENUMERABLE) &&
currentDesc.isEnumerable() != newDesc.isEnumerable()) {
// cannot make non-enumerable as enumerable or vice-versa
if (reject) {
throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
}
return false;
}
}
int propFlags = Property.mergeFlags(currentDesc, newDesc);
Property property = getMap().findProperty(key);
if (currentDesc.type() == PropertyDescriptor.DATA &&
(newDesc.type() == PropertyDescriptor.DATA || newDesc.type() == PropertyDescriptor.GENERIC)) {
if (! currentDesc.isConfigurable() && ! currentDesc.isWritable()) {
if (newDesc.has(WRITABLE) && newDesc.isWritable() ||
newDesc.has(VALUE) && ! ScriptRuntime.sameValue(currentDesc.getValue(), newDesc.getValue())) {
if (reject) {
throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
}
return false;
}
}
final boolean newValue = newDesc.has(VALUE);
final Object value = newValue? newDesc.getValue() : currentDesc.getValue();
if (newValue && property != null) {
// Temporarily clear flags.
property = modifyOwnProperty(property, 0);
set(key, value, false);
}
if (property == null) {
// promoting an arrayData value to actual property
addOwnProperty(key, propFlags, value);
checkIntegerKey(key);
} else {
// Now set the new flags
modifyOwnProperty(property, propFlags);
}
} else if (currentDesc.type() == PropertyDescriptor.ACCESSOR &&
(newDesc.type() == PropertyDescriptor.ACCESSOR ||
newDesc.type() == PropertyDescriptor.GENERIC)) {
if (! currentDesc.isConfigurable()) {
if (newDesc.has(PropertyDescriptor.GET) && ! ScriptRuntime.sameValue(currentDesc.getGetter(), newDesc.getGetter()) ||
newDesc.has(PropertyDescriptor.SET) && ! ScriptRuntime.sameValue(currentDesc.getSetter(), newDesc.getSetter())) {
if (reject) {
throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
}
return false;
}
}
// New set the new features.
modifyOwnProperty(property, propFlags,
newDesc.has(GET) ? newDesc.getGetter() : currentDesc.getGetter(),
newDesc.has(SET) ? newDesc.getSetter() : currentDesc.getSetter());
} else {
// changing descriptor type
if (! currentDesc.isConfigurable()) {
// not configurable can not be made configurable
if (reject) {
throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
}
return false;
}
propFlags = 0;
// Preserve only configurable and enumerable from current desc
// if those are not overridden in the new property descriptor.
boolean value = newDesc.has(CONFIGURABLE)? newDesc.isConfigurable() : currentDesc.isConfigurable();
if (!value) {
propFlags |= Property.NOT_CONFIGURABLE;
}
value = newDesc.has(ENUMERABLE)? newDesc.isEnumerable() : currentDesc.isEnumerable();
if (!value) {
propFlags |= Property.NOT_ENUMERABLE;
}
final int type = newDesc.type();
if (type == PropertyDescriptor.DATA) {
// get writable from the new descriptor
value = newDesc.has(WRITABLE) && newDesc.isWritable();
if (! value) {
propFlags |= Property.NOT_WRITABLE;
}
// delete the old property
deleteOwnProperty(property);
// add new data property
addOwnProperty(key, propFlags, newDesc.getValue());
} else if (type == PropertyDescriptor.ACCESSOR) {
if (property == null) {
addOwnProperty(key, propFlags,
newDesc.has(GET) ? newDesc.getGetter() : null,
newDesc.has(SET) ? newDesc.getSetter() : null);
} else {
// Modify old property with the new features.
modifyOwnProperty(property, propFlags,
newDesc.has(GET) ? newDesc.getGetter() : null,
newDesc.has(SET) ? newDesc.getSetter() : null);
}
}
}
checkIntegerKey(key);
return true;
}
/**
* Spec. mentions use of [[DefineOwnProperty]] for indexed properties in
* certain places (eg. Array.prototype.map, filter). We can not use ScriptObject.set
* method in such cases. This is because set method uses inherited setters (if any)
* from any object in proto chain such as Array.prototype, Object.prototype.
* This method directly sets a particular element value in the current object.
*
* @param index key for property
* @param value value to define
*/
public final void defineOwnProperty(final int index, final Object value) {
assert isValidArrayIndex(index) : "invalid array index";
final long longIndex = ArrayIndex.toLongIndex(index);
if (longIndex >= getArray().length()) {
// make array big enough to hold..
setArray(getArray().ensure(longIndex));
}
setArray(getArray().set(index, value, false));
}
private void checkIntegerKey(final String key) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
final ArrayData data = getArray();
if (data.has(index)) {
setArray(data.delete(index));
}
}
}
/**
* Add a new property to the object.
*
* @param key property key
* @param propertyDesc property descriptor for property
*/
public final void addOwnProperty(final String key, final PropertyDescriptor propertyDesc) {
// Already checked that there is no own property with that key.
PropertyDescriptor pdesc = propertyDesc;
final int propFlags = Property.toFlags(pdesc);
if (pdesc.type() == PropertyDescriptor.GENERIC) {
final Global global = Context.getGlobal();
final PropertyDescriptor dDesc = global.newDataDescriptor(UNDEFINED, false, false, false);
dDesc.fillFrom((ScriptObject)pdesc);
pdesc = dDesc;
}
final int type = pdesc.type();
if (type == PropertyDescriptor.DATA) {
addOwnProperty(key, propFlags, pdesc.getValue());
} else if (type == PropertyDescriptor.ACCESSOR) {
addOwnProperty(key, propFlags,
pdesc.has(GET) ? pdesc.getGetter() : null,
pdesc.has(SET) ? pdesc.getSetter() : null);
}
checkIntegerKey(key);
}
/**
* Low level property API (not using property descriptors)
*
* Find a property in the prototype hierarchy. Note: this is final and not
* a good idea to override. If you have to, use
* {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or
* {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the
* overriding way to find array properties
*
* @see jdk.nashorn.internal.objects.NativeArray
*
* @param key Property key.
* @param deep Whether the search should look up proto chain.
*
* @return FindPropertyData or null if not found.
*/
public final FindProperty findProperty(final String key, final boolean deep) {
return findProperty(key, deep, false, this);
}
/**
* Low level property API (not using property descriptors)
*
* Find a property in the prototype hierarchy. Note: this is not a good idea
* to override except as it was done in {@link WithObject}.
* If you have to, use
* {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or
* {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the
* overriding way to find array properties
*
* @see jdk.nashorn.internal.objects.NativeArray
*
* @param key Property key.
* @param deep Whether the search should look up proto chain.
* @param stopOnNonScope should a deep search stop on the first non-scope object?
* @param start the object on which the lookup was originally initiated
*
* @return FindPropertyData or null if not found.
*/
FindProperty findProperty(final String key, final boolean deep, final boolean stopOnNonScope, final ScriptObject start) {
// if doing deep search, stop search on the first non-scope object if asked to do so
if (stopOnNonScope && start != this && !isScope()) {
return null;
}
final PropertyMap selfMap = getMap();
final Property property = selfMap.findProperty(key);
if (property != null) {
return new FindProperty(start, this, property);
}
if (deep) {
final ScriptObject myProto = getProto();
if (myProto != null) {
return myProto.findProperty(key, deep, stopOnNonScope, start);
}
}
return null;
}
/**
* Low level property API. This is similar to {@link #findProperty(String, boolean)} but returns a
* {@code boolean} value instead of a {@link FindProperty} object.
* @param key Property key.
* @param deep Whether the search should look up proto chain.
* @return true if the property was found.
*/
boolean hasProperty(final String key, final boolean deep) {
if (getMap().findProperty(key) != null) {
return true;
}
if (deep) {
final ScriptObject myProto = getProto();
if (myProto != null) {
return myProto.hasProperty(key, deep);
}
}
return false;
}
/**
* Add a new property to the object.
*
* This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
*
* @param key Property key.
* @param propertyFlags Property flags.
* @param getter Property getter, or null if not defined
* @param setter Property setter, or null if not defined
*
* @return New property.
*/
public final Property addOwnProperty(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
return addOwnProperty(newUserAccessors(key, propertyFlags, getter, setter));
}
/**
* Add a new property to the object.
*
* This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
*
* @param key Property key.
* @param propertyFlags Property flags.
* @param value Value of property
*
* @return New property.
*/
public final Property addOwnProperty(final String key, final int propertyFlags, final Object value) {
final Property property = addSpillProperty(key, propertyFlags);
property.setObjectValue(this, this, value, false);
return property;
}
/**
* Add a new property to the object.
*
* This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
*
* @param newProperty property to add
*
* @return New property.
*/
public final Property addOwnProperty(final Property newProperty) {
PropertyMap oldMap = getMap();
while (true) {
final PropertyMap newMap = oldMap.addProperty(newProperty);
if (!compareAndSetMap(oldMap, newMap)) {
oldMap = getMap();
final Property oldProperty = oldMap.findProperty(newProperty.getKey());
if (oldProperty != null) {
return oldProperty;
}
} else {
return newProperty;
}
}
}
private void erasePropertyValue(final Property property) {
// Erase the property field value with undefined. If the property is defined
// by user-defined accessors, we don't want to call the setter!!
if (!(property instanceof UserAccessorProperty)) {
property.setObjectValue(this, this, UNDEFINED, false);
}
}
/**
* Delete a property from the object.
*
* @param property Property to delete.
*
* @return true if deleted.
*/
public final boolean deleteOwnProperty(final Property property) {
erasePropertyValue(property);
PropertyMap oldMap = getMap();
while (true) {
final PropertyMap newMap = oldMap.deleteProperty(property);
if (newMap == null) {
return false;
}
if (!compareAndSetMap(oldMap, newMap)) {
oldMap = getMap();
} else {
// delete getter and setter function references so that we don't leak
if (property instanceof UserAccessorProperty) {
final UserAccessorProperty uc = (UserAccessorProperty) property;
setSpill(uc.getGetterSlot(), null);
setSpill(uc.getSetterSlot(), null);
}
return true;
}
}
}
/**
* Modify a property in the object
*
* @param oldProperty property to modify
* @param propertyFlags new property flags
* @param getter getter for {@link UserAccessorProperty}, null if not present or N/A
* @param setter setter for {@link UserAccessorProperty}, null if not present or N/A
*
* @return new property
*/
public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
Property newProperty;
if (oldProperty instanceof UserAccessorProperty) {
final UserAccessorProperty uc = (UserAccessorProperty) oldProperty;
final int getterSlot = uc.getGetterSlot();
final int setterSlot = uc.getSetterSlot();
setSpill(getterSlot, getter);
setSpill(setterSlot, setter);
// if just flipping getter and setter with new functions, no need to change property or map
if (uc.flags == propertyFlags) {
return oldProperty;
}
newProperty = new UserAccessorProperty(oldProperty.getKey(), propertyFlags, getterSlot, setterSlot);
} else {
// erase old property value and create new user accessor property
erasePropertyValue(oldProperty);
newProperty = newUserAccessors(oldProperty.getKey(), propertyFlags, getter, setter);
}
return modifyOwnProperty(oldProperty, newProperty);
}
/**
* Modify a property in the object
*
* @param oldProperty property to modify
* @param propertyFlags new property flags
*
* @return new property
*/
public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags) {
return modifyOwnProperty(oldProperty, oldProperty.setFlags(propertyFlags));
}
/**
* Modify a property in the object, replacing a property with a new one
*
* @param oldProperty property to replace
* @param newProperty property to replace it with
*
* @return new property
*/
private Property modifyOwnProperty(final Property oldProperty, final Property newProperty) {
assert newProperty.getKey().equals(oldProperty.getKey()) : "replacing property with different key";
PropertyMap oldMap = getMap();
while (true) {
final PropertyMap newMap = oldMap.replaceProperty(oldProperty, newProperty);
if (!compareAndSetMap(oldMap, newMap)) {
oldMap = getMap();
final Property oldPropertyLookup = oldMap.findProperty(oldProperty.getKey());
if (oldPropertyLookup != null && oldPropertyLookup.equals(newProperty)) {
return oldPropertyLookup;
}
} else {
return newProperty;
}
}
}
/**
* Update getter and setter in an object literal.
*
* @param key Property key.
* @param getter {@link UserAccessorProperty} defined getter, or null if none
* @param setter {@link UserAccessorProperty} defined setter, or null if none
*/
public final void setUserAccessors(final String key, final ScriptFunction getter, final ScriptFunction setter) {
final Property oldProperty = getMap().findProperty(key);
if (oldProperty instanceof UserAccessorProperty) {
modifyOwnProperty(oldProperty, oldProperty.getFlags(), getter, setter);
} else {
addOwnProperty(newUserAccessors(key, oldProperty != null ? oldProperty.getFlags() : 0, getter, setter));
}
}
private static int getIntValue(final FindProperty find) {
final MethodHandle getter = find.getGetter(int.class);
if (getter != null) {
try {
return (int)getter.invokeExact((Object)find.getGetterReceiver());
} catch (final Error|RuntimeException e) {
throw e;
} catch (final Throwable e) {
throw new RuntimeException(e);
}
}
return ObjectClassGenerator.UNDEFINED_INT;
}
private static long getLongValue(final FindProperty find) {
final MethodHandle getter = find.getGetter(long.class);
if (getter != null) {
try {
return (long)getter.invokeExact((Object)find.getGetterReceiver());
} catch (final Error|RuntimeException e) {
throw e;
} catch (final Throwable e) {
throw new RuntimeException(e);
}
}
return ObjectClassGenerator.UNDEFINED_LONG;
}
private static double getDoubleValue(final FindProperty find) {
final MethodHandle getter = find.getGetter(double.class);
if (getter != null) {
try {
return (double)getter.invokeExact((Object)find.getGetterReceiver());
} catch (final Error|RuntimeException e) {
throw e;
} catch (final Throwable e) {
throw new RuntimeException(e);
}
}
return ObjectClassGenerator.UNDEFINED_DOUBLE;
}
/**
* Return methodHandle of value function for call.
*
* @param find data from find property.
* @param type method type of function.
* @param bindName null or name to bind to second argument (property not found method.)
*
* @return value of property as a MethodHandle or null.
*/
protected MethodHandle getCallMethodHandle(final FindProperty find, final MethodType type, final String bindName) {
return getCallMethodHandle(find.getObjectValue(), type, bindName);
}
/**
* Return methodHandle of value function for call.
*
* @param value value of receiver, it not a {@link ScriptFunction} this will return null.
* @param type method type of function.
* @param bindName null or name to bind to second argument (property not found method.)
*
* @return value of property as a MethodHandle or null.
*/
protected static MethodHandle getCallMethodHandle(final Object value, final MethodType type, final String bindName) {
return value instanceof ScriptFunction ? ((ScriptFunction)value).getCallMethodHandle(type, bindName) : null;
}
/**
* Get value using found property.
*
* @param property Found property.
*
* @return Value of property.
*/
public final Object getWithProperty(final Property property) {
return new FindProperty(this, this, property).getObjectValue();
}
/**
* Get a property given a key
*
* @param key property key
*
* @return property for key
*/
public final Property getProperty(final String key) {
return getMap().findProperty(key);
}
/**
* Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.)
* Used for argument access in a vararg function using parameter name.
* Returns the argument at a given key (index)
*
* @param key argument index
*
* @return the argument at the given position, or undefined if not present
*/
public Object getArgument(final int key) {
return get(key);
}
/**
* Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.)
* Used for argument access in a vararg function using parameter name.
* Returns the argument at a given key (index)
*
* @param key argument index
* @param value the value to write at the given index
*/
public void setArgument(final int key, final Object value) {
set(key, value, false);
}
/**
* Return the current context from the object's map.
* @return Current context.
*/
protected Context getContext() {
return Context.fromClass(getClass());
}
/**
* Return the map of an object.
* @return PropertyMap object.
*/
public final PropertyMap getMap() {
return map;
}
/**
* Set the initial map.
* @param map Initial map.
*/
public final void setMap(final PropertyMap map) {
this.map = map;
}
/**
* Conditionally set the new map if the old map is the same.
* @param oldMap Map prior to manipulation.
* @param newMap Replacement map.
* @return true if the operation succeeded.
*/
protected synchronized final boolean compareAndSetMap(final PropertyMap oldMap, final PropertyMap newMap) {
final boolean update = oldMap == this.map;
if (update) {
this.map = newMap;
}
return update;
}
/**
* Return the __proto__ of an object.
* @return __proto__ object.
*/
public final ScriptObject getProto() {
return proto;
}
/**
* Set the __proto__ of an object.
* @param newProto new __proto__ to set.
*/
public synchronized final void setProto(final ScriptObject newProto) {
final ScriptObject oldProto = proto;
if (oldProto != newProto) {
proto = newProto;
// Let current listeners know that the protototype has changed and set our map
final PropertyListeners listeners = getMap().getListeners();
if (listeners != null) {
listeners.protoChanged();
}
// Replace our current allocator map with one that is associated with the new prototype.
setMap(getMap().changeProto(newProto));
}
}
/**
* Set the initial __proto__ of this object. This should be used instead of
* {@link #setProto} if it is known that the current property map will not be
* used on a new object with any other parent property map, so we can pass over
* property map invalidation/evolution.
*
* @param initialProto the initial __proto__ to set.
*/
public void setInitialProto(final ScriptObject initialProto) {
this.proto = initialProto;
}
/**
* Set the __proto__ of an object with checks.
* @param newProto Prototype to set.
*/
public final void setProtoCheck(final Object newProto) {
if (!isExtensible()) {
throw typeError("__proto__.set.non.extensible", ScriptRuntime.safeToString(this));
}
if (newProto == null || newProto instanceof ScriptObject) {
// check for circularity
ScriptObject p = (ScriptObject)newProto;
while (p != null) {
if (p == this) {
throw typeError("circular.__proto__.set", ScriptRuntime.safeToString(this));
}
p = p.getProto();
}
setProto((ScriptObject)newProto);
} else {
final Global global = Context.getGlobal();
final Object newProtoObject = JSType.toScriptObject(global, newProto);
if (newProtoObject instanceof ScriptObject) {
setProto((ScriptObject)newProtoObject);
} else {
throw typeError(global, "cant.set.proto.to.non.object", ScriptRuntime.safeToString(this), ScriptRuntime.safeToString(newProto));
}
}
}
/**
* return an array of own property keys associated with the object.
*
* @param all True if to include non-enumerable keys.
* @return Array of keys.
*/
public String[] getOwnKeys(final boolean all) {
final List keys = new ArrayList<>();
final PropertyMap selfMap = this.getMap();
final ArrayData array = getArray();
final long length = array.length();
for (long i = 0; i < length; i = array.nextIndex(i)) {
if (array.has((int)i)) {
keys.add(JSType.toString(i));
}
}
for (final Property property : selfMap.getProperties()) {
if (all || property.isEnumerable()) {
keys.add(property.getKey());
}
}
return keys.toArray(new String[keys.size()]);
}
/**
* Check if this ScriptObject has array entries. This means that someone has
* set values with numeric keys in the object.
*
* @return true if array entries exists.
*/
public boolean hasArrayEntries() {
return getArray().length() > 0 || getMap().containsArrayKeys();
}
/**
* Return the valid JavaScript type name descriptor
*
* @return "Object"
*/
public String getClassName() {
return "Object";
}
/**
* {@code length} is a well known property. This is its getter.
* Note that this *may* be optimized by other classes
*
* @return length property value for this ScriptObject
*/
public Object getLength() {
return get("length");
}
/**
* Stateless toString for ScriptObjects.
*
* @return string description of this object, e.g. {@code [object Object]}
*/
public String safeToString() {
return "[object " + getClassName() + "]";
}
/**
* Return the default value of the object with a given preferred type hint.
* The preferred type hints are String.class for type String, Number.class
* for type Number.
*
* A hint of null means "no hint".
*
* ECMA 8.12.8 [[DefaultValue]](hint)
*
* @param typeHint the preferred type hint
* @return the default value
*/
public Object getDefaultValue(final Class typeHint) {
// We delegate to Global, as the implementation uses dynamic call sites to invoke object's "toString" and
// "valueOf" methods, and in order to avoid those call sites from becoming megamorphic when multiple contexts
// are being executed in a long-running program, we move the code and their associated dynamic call sites
// (Global.TO_STRING and Global.VALUE_OF) into per-context code.
return Context.getGlobal().getDefaultValue(this, typeHint);
}
/**
* Checking whether a script object is an instance of another. Used
* in {@link ScriptFunction} for hasInstance implementation, walks
* the proto chain
*
* @param instance instace to check
* @return true if 'instance' is an instance of this object
*/
public boolean isInstance(final ScriptObject instance) {
return false;
}
/**
* Flag this ScriptObject as non extensible
*
* @return the object after being made non extensible
*/
public ScriptObject preventExtensions() {
PropertyMap oldMap = getMap();
while (true) {
final PropertyMap newMap = getMap().preventExtensions();
if (!compareAndSetMap(oldMap, newMap)) {
oldMap = getMap();
} else {
return this;
}
}
}
/**
* Check whether if an Object (not just a ScriptObject) represents JavaScript array
*
* @param obj object to check
*
* @return true if array
*/
public static boolean isArray(final Object obj) {
return (obj instanceof ScriptObject) && ((ScriptObject)obj).isArray();
}
/**
* Check if this ScriptObject is an array
* @return true if array
*/
public final boolean isArray() {
return (flags & IS_ARRAY) != 0;
}
/**
* Flag this ScriptObject as being an array
*/
public final void setIsArray() {
flags |= IS_ARRAY;
}
/**
* Check if this ScriptObject is an {@code arguments} vector
* @return true if arguments vector
*/
public final boolean isArguments() {
return (flags & IS_ARGUMENTS) != 0;
}
/**
* Flag this ScriptObject as being an {@code arguments} vector
*/
public final void setIsArguments() {
flags |= IS_ARGUMENTS;
}
/**
* Check if this object has non-writable length property
*
* @return {@code true} if 'length' property is non-writable
*/
public final boolean isLengthNotWritable() {
return (flags & IS_LENGTH_NOT_WRITABLE) != 0;
}
/**
* Flag this object as having non-writable length property
*/
public void setIsLengthNotWritable() {
flags |= IS_LENGTH_NOT_WRITABLE;
}
/**
* Get the {@link ArrayData} for this ScriptObject if it is an array
* @return array data
*/
public final ArrayData getArray() {
return arrayData;
}
/**
* Set the {@link ArrayData} for this ScriptObject if it is to be an array
* @param arrayData the array data
*/
public final void setArray(final ArrayData arrayData) {
this.arrayData = arrayData;
}
/**
* Check if this ScriptObject is extensible
* @return true if extensible
*/
public boolean isExtensible() {
return getMap().isExtensible();
}
/**
* ECMAScript 15.2.3.8 - seal implementation
* @return the sealed ScriptObject
*/
public ScriptObject seal() {
PropertyMap oldMap = getMap();
while (true) {
final PropertyMap newMap = getMap().seal();
if (!compareAndSetMap(oldMap, newMap)) {
oldMap = getMap();
} else {
setArray(ArrayData.seal(getArray()));
return this;
}
}
}
/**
* Check whether this ScriptObject is sealed
* @return true if sealed
*/
public boolean isSealed() {
return getMap().isSealed();
}
/**
* ECMA 15.2.39 - freeze implementation. Freeze this ScriptObject
* @return the frozen ScriptObject
*/
public ScriptObject freeze() {
PropertyMap oldMap = getMap();
while (true) {
final PropertyMap newMap = getMap().freeze();
if (!compareAndSetMap(oldMap, newMap)) {
oldMap = getMap();
} else {
setArray(ArrayData.freeze(getArray()));
return this;
}
}
}
/**
* Check whether this ScriptObject is frozen
* @return true if frozen
*/
public boolean isFrozen() {
return getMap().isFrozen();
}
/**
* Flag this ScriptObject as scope
*/
public final void setIsScope() {
if (Context.DEBUG) {
scopeCount++;
}
flags |= IS_SCOPE;
}
/**
* Check whether this ScriptObject is scope
* @return true if scope
*/
public final boolean isScope() {
return (flags & IS_SCOPE) != 0;
}
/**
* Clears the properties from a ScriptObject
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @param strict strict mode or not
*/
public void clear(final boolean strict) {
final Iterator iter = propertyIterator();
while (iter.hasNext()) {
delete(iter.next(), strict);
}
}
/**
* Checks if a property with a given key is present in a ScriptObject
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @param key the key to check for
* @return true if a property with the given key exists, false otherwise
*/
public boolean containsKey(final Object key) {
return has(key);
}
/**
* Checks if a property with a given value is present in a ScriptObject
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @param value value to check for
* @return true if a property with the given value exists, false otherwise
*/
public boolean containsValue(final Object value) {
final Iterator iter = valueIterator();
while (iter.hasNext()) {
if (iter.next().equals(value)) {
return true;
}
}
return false;
}
/**
* Returns the set of {@literal } entries that make up this
* ScriptObject's properties
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @return an entry set of all the properties in this object
*/
public Set> entrySet() {
final Iterator iter = propertyIterator();
final Set> entries = new HashSet<>();
while (iter.hasNext()) {
final Object key = iter.next();
entries.add(new AbstractMap.SimpleImmutableEntry<>(key, get(key)));
}
return Collections.unmodifiableSet(entries);
}
/**
* Check whether a ScriptObject contains no properties
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @return true if object has no properties
*/
public boolean isEmpty() {
return !propertyIterator().hasNext();
}
/**
* Return the set of keys (property names) for all properties
* in this ScriptObject
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @return keySet of this ScriptObject
*/
public Set keySet() {
final Iterator iter = propertyIterator();
final Set keySet = new HashSet<>();
while (iter.hasNext()) {
keySet.add(iter.next());
}
return Collections.unmodifiableSet(keySet);
}
/**
* Put a property in the ScriptObject
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @param key property key
* @param value property value
* @param strict strict mode or not
* @return oldValue if property with same key existed already
*/
public Object put(final Object key, final Object value, final boolean strict) {
final Object oldValue = get(key);
set(key, value, strict);
return oldValue;
}
/**
* Put several properties in the ScriptObject given a mapping
* of their keys to their values
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @param otherMap a {@literal } map of properties to add
* @param strict strict mode or not
*/
public void putAll(final Map otherMap, final boolean strict) {
for (final Map.Entry entry : otherMap.entrySet()) {
set(entry.getKey(), entry.getValue(), strict);
}
}
/**
* Remove a property from the ScriptObject.
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @param key the key of the property
* @param strict strict mode or not
* @return the oldValue of the removed property
*/
public Object remove(final Object key, final boolean strict) {
final Object oldValue = get(key);
delete(key, strict);
return oldValue;
}
/**
* Return the size of the ScriptObject - i.e. the number of properties
* it contains
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @return number of properties in ScriptObject
*/
public int size() {
int n = 0;
for (final Iterator iter = propertyIterator(); iter.hasNext(); iter.next()) {
n++;
}
return n;
}
/**
* Return the values of the properties in the ScriptObject
* (java.util.Map-like method to help ScriptObjectMirror implementation)
*
* @return collection of values for the properties in this ScriptObject
*/
public Collection values() {
final List values = new ArrayList<>(size());
final Iterator iter = valueIterator();
while (iter.hasNext()) {
values.add(iter.next());
}
return Collections.unmodifiableList(values);
}
/**
* Lookup method that, given a CallSiteDescriptor, looks up the target
* MethodHandle and creates a GuardedInvocation
* with the appropriate guard(s).
*
* @param desc call site descriptor
* @param request the link request
*
* @return GuardedInvocation for the callsite
*/
public GuardedInvocation lookup(final CallSiteDescriptor desc, final LinkRequest request) {
final int c = desc.getNameTokenCount();
// JavaScript is "immune" to all currently defined Dynalink composite operation - getProp is the same as getElem
// is the same as getMethod as JavaScript objects have a single namespace for all three. Therefore, we don't
// care about them, and just link to whatever is the first operation.
final String operator = CallSiteDescriptorFactory.tokenizeOperators(desc).get(0);
// NOTE: we support getElem and setItem as JavaScript doesn't distinguish items from properties. Nashorn itself
// emits "dyn:getProp:identifier" for "." and "dyn:getElem" for "[]", but we are
// more flexible here and dispatch not on operation name (getProp vs. getElem), but rather on whether the
// operation has an associated name or not.
switch (operator) {
case "getProp":
case "getElem":
case "getMethod":
return c > 2 ? findGetMethod(desc, request, operator) : findGetIndexMethod(desc, request);
case "setProp":
case "setElem":
return c > 2 ? findSetMethod(desc, request) : findSetIndexMethod(desc);
case "call":
return findCallMethod(desc, request);
case "new":
return findNewMethod(desc);
case "callMethod":
return findCallMethodMethod(desc, request);
default:
return null;
}
}
/**
* Find the appropriate New method for an invoke dynamic call.
*
* @param desc The invoke dynamic call site descriptor.
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findNewMethod(final CallSiteDescriptor desc) {
return notAFunction();
}
/**
* Find the appropriate CALL method for an invoke dynamic call.
* This generates "not a function" always
*
* @param desc the call site descriptor.
* @param request the link request
*
* @return GuardedInvocation to be invoed at call site.
*/
protected GuardedInvocation findCallMethod(final CallSiteDescriptor desc, final LinkRequest request) {
return notAFunction();
}
private GuardedInvocation notAFunction() {
throw typeError("not.a.function", ScriptRuntime.safeToString(this));
}
/**
* Find an implementation for a "dyn:callMethod" operation. Note that Nashorn internally never uses
* "dyn:callMethod", but instead always emits two call sites in bytecode, one for "dyn:getMethod", and then another
* one for "dyn:call". Explicit support for "dyn:callMethod" is provided for the benefit of potential external
* callers. The implementation itself actually folds a "dyn:getMethod" method handle into a "dyn:call" method handle.
*
* @param desc the call site descriptor.
* @param request the link request
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findCallMethodMethod(final CallSiteDescriptor desc, final LinkRequest request) {
// R(P0, P1, ...)
final MethodType callType = desc.getMethodType();
// use type Object(P0) for the getter
final CallSiteDescriptor getterType = desc.changeMethodType(MethodType.methodType(Object.class, callType.parameterType(0)));
final GuardedInvocation getter = findGetMethod(getterType, request, "getMethod");
// Object(P0) => Object(P0, P1, ...)
final MethodHandle argDroppingGetter = MH.dropArguments(getter.getInvocation(), 1, callType.parameterList().subList(1, callType.parameterCount()));
// R(Object, P0, P1, ...)
final MethodHandle invoker = Bootstrap.createDynamicInvoker("dyn:call", callType.insertParameterTypes(0, argDroppingGetter.type().returnType()));
// Fold Object(P0, P1, ...) into R(Object, P0, P1, ...) => R(P0, P1, ...)
return getter.replaceMethods(MH.foldArguments(invoker, argDroppingGetter), getter.getGuard());
}
/**
* Test whether this object contains in its prototype chain or is itself a with-object.
* @return true if a with-object was found
*/
final boolean hasWithScope() {
if (isScope()) {
for (ScriptObject obj = this; obj != null; obj = obj.getProto()) {
if (obj instanceof WithObject) {
return true;
}
}
}
return false;
}
/**
* Add a filter to the first argument of {@code methodHandle} that calls its {@link #getProto()} method
* {@code depth} times.
* @param methodHandle a method handle
* @param depth distance to target prototype
* @return the filtered method handle
*/
static MethodHandle addProtoFilter(final MethodHandle methodHandle, final int depth) {
if (depth == 0) {
return methodHandle;
}
final int listIndex = depth - 1; // We don't need 0-deep walker
MethodHandle filter = listIndex < protoFilters.size() ? protoFilters.get(listIndex) : null;
if(filter == null) {
filter = addProtoFilter(GETPROTO, depth - 1);
protoFilters.add(null);
protoFilters.set(listIndex, filter);
}
return MH.filterArguments(methodHandle, 0, filter.asType(filter.type().changeReturnType(methodHandle.type().parameterType(0))));
}
/**
* Find the appropriate GET method for an invoke dynamic call.
*
* @param desc the call site descriptor
* @param request the link request
* @param operator operator for get: getProp, getMethod, getElem etc
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
if (request.isCallSiteUnstable() || hasWithScope()) {
return findMegaMorphicGetMethod(desc, name, "getMethod".equals(operator), isScope() && NashornCallSiteDescriptor.isScope(desc));
}
final FindProperty find = findProperty(name, true);
MethodHandle methodHandle;
if (find == null) {
if (PROTO_PROPERTY_NAME.equals(name)) {
return new GuardedInvocation(GETPROTO, NashornGuards.getScriptObjectGuard());
}
if ("getProp".equals(operator)) {
return noSuchProperty(desc, request);
} else if ("getMethod".equals(operator)) {
return noSuchMethod(desc, request);
} else if ("getElem".equals(operator)) {
return createEmptyGetter(desc, name);
}
throw new AssertionError(); // never invoked with any other operation
}
final Class returnType = desc.getMethodType().returnType();
final Property property = find.getProperty();
methodHandle = find.getGetter(returnType);
// Get the appropriate guard for this callsite and property.
final MethodHandle guard = NashornGuards.getGuard(this, property, desc);
final ScriptObject owner = find.getOwner();
if (methodHandle != null) {
assert methodHandle.type().returnType().equals(returnType);
if (find.isSelf()) {
return new GuardedInvocation(methodHandle, guard);
}
if (!property.hasGetterFunction(owner)) {
// Add a filter that replaces the self object with the prototype owning the property.
methodHandle = addProtoFilter(methodHandle, find.getProtoChainLength());
}
return new GuardedInvocation(methodHandle, guard == null ? null : getProtoSwitchPoint(name, owner), guard);
}
assert !NashornCallSiteDescriptor.isFastScope(desc);
return new GuardedInvocation(Lookup.emptyGetter(returnType), getProtoSwitchPoint(name, owner), guard);
}
private static GuardedInvocation findMegaMorphicGetMethod(final CallSiteDescriptor desc, final String name,
final boolean isMethod, final boolean isScope) {
final MethodHandle invoker = MH.insertArguments(MEGAMORPHIC_GET, 1, name, isMethod, isScope);
final MethodHandle guard = getScriptObjectGuard(desc.getMethodType());
return new GuardedInvocation(invoker, guard);
}
@SuppressWarnings("unused")
private Object megamorphicGet(final String key, final boolean isMethod, final boolean isScope) {
final FindProperty find = findProperty(key, true);
if (find != null) {
return find.getObjectValue();
}
if (isScope) {
throw referenceError("not.defined", key);
}
return isMethod ? getNoSuchMethod(key) : invokeNoSuchProperty(key);
}
/**
* Find the appropriate GETINDEX method for an invoke dynamic call.
*
* @param desc the call site descriptor
* @param request the link request
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
return findGetIndexMethod(desc.getMethodType());
}
/**
* Find the appropriate GETINDEX method for an invoke dynamic call.
*
* @param callType the call site method type
* @return GuardedInvocation to be invoked at call site.
*/
private static GuardedInvocation findGetIndexMethod(final MethodType callType) {
final Class returnClass = callType.returnType();
final Class keyClass = callType.parameterType(1);
String name = "get";
if (returnClass.isPrimitive()) {
//turn e.g. get with a double into getDouble
final String returnTypeName = returnClass.getName();
name += Character.toUpperCase(returnTypeName.charAt(0)) + returnTypeName.substring(1, returnTypeName.length());
}
return new GuardedInvocation(findOwnMH(name, returnClass, keyClass), getScriptObjectGuard(callType));
}
private static MethodHandle getScriptObjectGuard(final MethodType type) {
return ScriptObject.class.isAssignableFrom(type.parameterType(0)) ? null : NashornGuards.getScriptObjectGuard();
}
/**
* Get a switch point for a property with the given {@code name} that will be invalidated when
* the property definition is changed in this object's prototype chain. Returns {@code null} if
* the property is defined in this object itself.
*
* @param name the property name
* @param owner the property owner, null if property is not defined
* @return a SwitchPoint or null
*/
public final SwitchPoint getProtoSwitchPoint(final String name, final ScriptObject owner) {
if (owner == this || getProto() == null) {
return null;
}
for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) {
ScriptObject parent = obj.getProto();
parent.getMap().addListener(name, obj.getMap());
}
return getMap().getSwitchPoint(name);
}
/**
* Find the appropriate SET method for an invoke dynamic call.
*
* @param desc the call site descriptor
* @param request the link request
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
if (request.isCallSiteUnstable() || hasWithScope()) {
return findMegaMorphicSetMethod(desc, name);
}
final boolean scope = isScope();
/*
* If doing property set on a scope object, we should stop proto search on the first
* non-scope object. Without this, for example, when assigning "toString" on global scope,
* we'll end up assigning it on it's proto - which is Object.prototype.toString !!
*
* toString = function() { print("global toString"); } // don't affect Object.prototype.toString
*/
FindProperty find = findProperty(name, true, scope, this);
// If it's not a scope search, then we don't want any inherited properties except those with user defined accessors.
if (!scope && find != null && find.isInherited() && !(find.getProperty() instanceof UserAccessorProperty)) {
// We should still check if inherited data property is not writable
if (isExtensible() && !find.getProperty().isWritable()) {
return createEmptySetMethod(desc, "property.not.writable", false);
}
// Otherwise, forget the found property
find = null;
}
if (find != null) {
if(!find.getProperty().isWritable()) {
// Existing, non-writable property
return createEmptySetMethod(desc, "property.not.writable", true);
}
} else {
if (PROTO_PROPERTY_NAME.equals(name)) {
return new GuardedInvocation(SETPROTOCHECK, NashornGuards.getScriptObjectGuard());
} else if (! isExtensible()) {
return createEmptySetMethod(desc, "object.non.extensible", false);
}
}
return new SetMethodCreator(this, find, desc).createGuardedInvocation();
}
private GuardedInvocation createEmptySetMethod(final CallSiteDescriptor desc, String strictErrorMessage, boolean canBeFastScope) {
final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
if (NashornCallSiteDescriptor.isStrict(desc)) {
throw typeError(strictErrorMessage, name, ScriptRuntime.safeToString((this)));
}
assert canBeFastScope || !NashornCallSiteDescriptor.isFastScope(desc);
return new GuardedInvocation(Lookup.EMPTY_SETTER, getProtoSwitchPoint(name, null), NashornGuards.getMapGuard(getMap()));
}
@SuppressWarnings("unused")
private static void setField(final CallSiteDescriptor desc, final PropertyMap oldMap, final PropertyMap newMap, final MethodHandle setter, final Object self, final Object value) throws Throwable {
final ScriptObject obj = (ScriptObject)self;
final boolean isStrict = NashornCallSiteDescriptor.isStrict(desc);
if (!obj.isExtensible()) {
if (isStrict) {
throw typeError("object.non.extensible", desc.getNameToken(2), ScriptRuntime.safeToString(obj));
}
} else if (obj.compareAndSetMap(oldMap, newMap)) {
setter.invokeExact(self, value);
} else {
obj.set(desc.getNameToken(CallSiteDescriptor.NAME_OPERAND), value, isStrict);
}
}
@SuppressWarnings("unused")
private static void setSpill(final CallSiteDescriptor desc, final PropertyMap oldMap, final PropertyMap newMap, final int index, final Object self, final Object value) {
final ScriptObject obj = (ScriptObject)self;
if (obj.trySetSpill(desc, oldMap, newMap, value)) {
obj.spill[index] = value;
}
}
private boolean trySetSpill(final CallSiteDescriptor desc, final PropertyMap oldMap, final PropertyMap newMap, final Object value) {
final boolean isStrict = NashornCallSiteDescriptor.isStrict(desc);
if (!isExtensible() && isStrict) {
throw typeError("object.non.extensible", desc.getNameToken(2), ScriptRuntime.safeToString(this));
} else if (compareAndSetMap(oldMap, newMap)) {
return true;
} else {
set(desc.getNameToken(CallSiteDescriptor.NAME_OPERAND), value, isStrict);
return false;
}
}
@SuppressWarnings("unused")
private static void setSpillWithNew(final CallSiteDescriptor desc, final PropertyMap oldMap, final PropertyMap newMap, final int index, final Object self, final Object value) {
final ScriptObject obj = (ScriptObject)self;
final boolean isStrict = NashornCallSiteDescriptor.isStrict(desc);
if (!obj.isExtensible()) {
if (isStrict) {
throw typeError("object.non.extensible", desc.getNameToken(2), ScriptRuntime.safeToString(obj));
}
} else if (obj.compareAndSetMap(oldMap, newMap)) {
obj.spill = new Object[SPILL_RATE];
obj.spill[index] = value;
} else {
obj.set(desc.getNameToken(2), value, isStrict);
}
}
@SuppressWarnings("unused")
private static void setSpillWithGrow(final CallSiteDescriptor desc, final PropertyMap oldMap, final PropertyMap newMap, final int index, final int newLength, final Object self, final Object value) {
final ScriptObject obj = (ScriptObject)self;
final boolean isStrict = NashornCallSiteDescriptor.isStrict(desc);
if (!obj.isExtensible()) {
if (isStrict) {
throw typeError("object.non.extensible", desc.getNameToken(2), ScriptRuntime.safeToString(obj));
}
} else if (obj.compareAndSetMap(oldMap, newMap)) {
final int oldLength = obj.spill.length;
final Object[] newSpill = new Object[newLength];
System.arraycopy(obj.spill, 0, newSpill, 0, oldLength);
obj.spill = newSpill;
obj.spill[index] = value;
} else {
obj.set(desc.getNameToken(2), value, isStrict);
}
}
@SuppressWarnings("unused")
private static Object globalFilter(final Object object) {
ScriptObject sobj = (ScriptObject) object;
while (sobj != null && !(sobj instanceof Global)) {
sobj = sobj.getProto();
}
return sobj;
}
private static GuardedInvocation findMegaMorphicSetMethod(final CallSiteDescriptor desc, final String name) {
final MethodType type = desc.getMethodType().insertParameterTypes(1, Object.class);
final GuardedInvocation inv = findSetIndexMethod(type, NashornCallSiteDescriptor.isStrict(desc));
return inv.replaceMethods(MH.insertArguments(inv.getInvocation(), 1, name), inv.getGuard());
}
private static GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc) { // array, index, value
return findSetIndexMethod(desc.getMethodType(), NashornCallSiteDescriptor.isStrict(desc));
}
/**
* Find the appropriate SETINDEX method for an invoke dynamic call.
*
* @param callType the method type at the call site
* @param isStrict are we in strict mode?
*
* @return GuardedInvocation to be invoked at call site.
*/
private static GuardedInvocation findSetIndexMethod(final MethodType callType, final boolean isStrict) {
assert callType.parameterCount() == 3;
final Class keyClass = callType.parameterType(1);
final Class valueClass = callType.parameterType(2);
MethodHandle methodHandle = findOwnMH("set", void.class, keyClass, valueClass, boolean.class);
methodHandle = MH.insertArguments(methodHandle, 3, isStrict);
return new GuardedInvocation(methodHandle, getScriptObjectGuard(callType));
}
/**
* Fall back if a function property is not found.
* @param desc The call site descriptor
* @param request the link request
* @return GuardedInvocation to be invoked at call site.
*/
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
final String name = desc.getNameToken(2);
final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
final boolean scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);
if (find == null) {
return noSuchProperty(desc, request);
}
final Object value = find.getObjectValue();
if (! (value instanceof ScriptFunction)) {
return createEmptyGetter(desc, name);
}
final ScriptFunction func = (ScriptFunction)value;
final Object thiz = scopeCall && func.isStrict() ? ScriptRuntime.UNDEFINED : this;
// TODO: It'd be awesome if we could bind "name" without binding "this".
return new GuardedInvocation(MH.dropArguments(MH.constant(ScriptFunction.class,
func.makeBoundFunction(thiz, new Object[] { name })), 0, Object.class),
null, NashornGuards.getMapGuard(getMap()));
}
/**
* Fall back if a property is not found.
* @param desc the call site descriptor.
* @param request the link request
* @return GuardedInvocation to be invoked at call site.
*/
@SuppressWarnings("null")
public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) {
final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
final boolean scopeAccess = isScope() && NashornCallSiteDescriptor.isScope(desc);
if (find != null) {
final Object value = find.getObjectValue();
ScriptFunction func = null;
MethodHandle methodHandle = null;
if (value instanceof ScriptFunction) {
func = (ScriptFunction)value;
methodHandle = getCallMethodHandle(func, desc.getMethodType(), name);
}
if (methodHandle != null) {
if (scopeAccess && func.isStrict()) {
methodHandle = bindTo(methodHandle, UNDEFINED);
}
return new GuardedInvocation(methodHandle,
getProtoSwitchPoint(NO_SUCH_PROPERTY_NAME, find.getOwner()),
getKnownFunctionPropertyGuard(getMap(), find.getGetter(Object.class), find.getOwner(), func));
}
}
if (scopeAccess) {
throw referenceError("not.defined", name);
}
return createEmptyGetter(desc, name);
}
/**
* Invoke fall back if a property is not found.
* @param name Name of property.
* @return Result from call.
*/
protected Object invokeNoSuchProperty(final String name) {
final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
if (find != null) {
final Object func = find.getObjectValue();
if (func instanceof ScriptFunction) {
return ScriptRuntime.apply((ScriptFunction)func, this, name);
}
}
return UNDEFINED;
}
/**
* Get __noSuchMethod__ as a function bound to this object and {@code name} if it is defined.
* @param name the method name
* @return the bound function, or undefined
*/
private Object getNoSuchMethod(final String name) {
final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
if (find == null) {
return invokeNoSuchProperty(name);
}
final Object value = find.getObjectValue();
if (! (value instanceof ScriptFunction)) {
return UNDEFINED;
}
return ((ScriptFunction)value).makeBoundFunction(this, new Object[] {name});
}
private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final String name) {
return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
getProtoSwitchPoint(name, null), NashornGuards.getMapGuard(getMap()));
}
private abstract static class ScriptObjectIterator implements Iterator {
protected T[] values;
protected final ScriptObject object;
private int index;
ScriptObjectIterator(final ScriptObject object) {
this.object = object;
}
protected abstract void init();
@Override
public boolean hasNext() {
if (values == null) {
init();
}
return index < values.length;
}
@Override
public T next() {
if (values == null) {
init();
}
return values[index++];
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}
private static class KeyIterator extends ScriptObjectIterator {
KeyIterator(final ScriptObject object) {
super(object);
}
@Override
protected void init() {
final Set keys = new LinkedHashSet<>();
for (ScriptObject self = object; self != null; self = self.getProto()) {
keys.addAll(Arrays.asList(self.getOwnKeys(false)));
}
this.values = keys.toArray(new String[keys.size()]);
}
}
private static class ValueIterator extends ScriptObjectIterator {
ValueIterator(final ScriptObject object) {
super(object);
}
@Override
protected void init() {
final ArrayList valueList = new ArrayList<>();
for (ScriptObject self = object; self != null; self = self.getProto()) {
for (final String key : self.getOwnKeys(false)) {
valueList.add(self.get(key));
}
}
this.values = valueList.toArray(new Object[valueList.size()]);
}
}
/**
* Add a spill property for the given key.
* @param key Property key.
* @param propertyFlags Property flags.
* @return Added property.
*/
private Property addSpillProperty(final String key, final int propertyFlags) {
int fieldCount = getMap().getFieldCount();
int fieldMaximum = getMap().getFieldMaximum();
Property property;
if (fieldCount < fieldMaximum) {
property = new AccessorProperty(key, propertyFlags & ~Property.IS_SPILL, getClass(), fieldCount);
property = addOwnProperty(property);
} else {
int i = getMap().getSpillLength();
property = new AccessorProperty(key, propertyFlags | Property.IS_SPILL, i);
property = addOwnProperty(property);
i = property.getSlot();
final int newLength = (i + SPILL_RATE) / SPILL_RATE * SPILL_RATE;
if (spill == null || newLength > spill.length) {
final Object[] newSpill = new Object[newLength];
if (spill != null) {
System.arraycopy(spill, 0, newSpill, 0, spill.length);
}
spill = newSpill;
}
}
return property;
}
/**
* Add a spill entry for the given key.
* @param key Property key.
* @return Setter method handle.
*/
MethodHandle addSpill(final String key) {
final Property spillProperty = addSpillProperty(key, 0);
final Class type = Object.class;
return spillProperty.getSetter(type, getMap()); //TODO specfields
}
/**
* Make sure arguments are paired correctly, with respect to more parameters than declared,
* fewer parameters than declared and other things that JavaScript allows. This might involve
* creating collectors.
*
* @param methodHandle method handle for invoke
* @param callType type of the call
*
* @return method handle with adjusted arguments
*/
protected static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType) {
return pairArguments(methodHandle, callType, null);
}
/**
* Make sure arguments are paired correctly, with respect to more parameters than declared,
* fewer parameters than declared and other things that JavaScript allows. This might involve
* creating collectors.
*
* Make sure arguments are paired correctly.
* @param methodHandle MethodHandle to adjust.
* @param callType MethodType of the call site.
* @param callerVarArg true if the caller is vararg, false otherwise, null if it should be inferred from the
* {@code callType}; basically, if the last parameter type of the call site is an array, it'll be considered a
* variable arity call site. These are ordinarily rare; Nashorn code generator creates variable arity call sites
* when the call has more than {@link LinkerCallSite#ARGLIMIT} parameters.
*
* @return method handle with adjusted arguments
*/
public static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType, final Boolean callerVarArg) {
final MethodType methodType = methodHandle.type();
if (methodType.equals(callType)) {
return methodHandle;
}
final int parameterCount = methodType.parameterCount();
final int callCount = callType.parameterCount();
final boolean isCalleeVarArg = parameterCount > 0 && methodType.parameterType(parameterCount - 1).isArray();
final boolean isCallerVarArg = callerVarArg != null ? callerVarArg.booleanValue() : (callCount > 0 &&
callType.parameterType(callCount - 1).isArray());
if (callCount < parameterCount) {
final int missingArgs = parameterCount - callCount;
final Object[] fillers = new Object[missingArgs];
Arrays.fill(fillers, UNDEFINED);
if (isCalleeVarArg) {
fillers[missingArgs - 1] = new Object[0];
}
return MH.insertArguments(
methodHandle,
parameterCount - missingArgs,
fillers);
}
if (isCalleeVarArg) {
return isCallerVarArg ?
methodHandle :
MH.asCollector(methodHandle, Object[].class, callCount - parameterCount + 1);
}
if (isCallerVarArg) {
final int spreadArgs = parameterCount - callCount + 1;
return MH.filterArguments(
MH.asSpreader(
methodHandle,
Object[].class,
spreadArgs),
callCount - 1,
MH.insertArguments(
TRUNCATINGFILTER,
0,
spreadArgs)
);
}
if (callCount > parameterCount) {
final int discardedArgs = callCount - parameterCount;
final Class[] discards = new Class[discardedArgs];
Arrays.fill(discards, Object.class);
return MH.dropArguments(methodHandle, callCount - discardedArgs, discards);
}
return methodHandle;
}
@SuppressWarnings("unused")
private static Object[] truncatingFilter(final int n, final Object[] array) {
final int length = array == null ? 0 : array.length;
if (n == length) {
return array == null ? new Object[0] : array;
}
final Object[] newArray = new Object[n];
if (array != null) {
for (int i = 0; i < n && i < length; i++) {
newArray[i] = array[i];
}
}
if (length < n) {
final Object fill = UNDEFINED;
for (int i = length; i < n; i++) {
newArray[i] = fill;
}
}
return newArray;
}
/**
* Numeric length setter for length property
*
* @param newLength new length to set
*/
public final void setLength(final long newLength) {
final long arrayLength = getArray().length();
if (newLength == arrayLength) {
return;
}
if (newLength > arrayLength) {
setArray(getArray().ensure(newLength - 1));
if (getArray().canDelete(arrayLength, (newLength - 1), false)) {
setArray(getArray().delete(arrayLength, (newLength - 1)));
}
return;
}
if (newLength < arrayLength) {
long actualLength = newLength;
// Check for numeric keys in property map and delete them or adjust length, depending on whether
// they're defined as configurable. See ES5 #15.4.5.2
if (getMap().containsArrayKeys()) {
for (long l = arrayLength - 1; l >= newLength; l--) {
final FindProperty find = findProperty(JSType.toString(l), false);
if (find != null) {
if (find.getProperty().isConfigurable()) {
deleteOwnProperty(find.getProperty());
} else {
actualLength = l + 1;
break;
}
}
}
}
setArray(getArray().shrink(actualLength));
getArray().setLength(actualLength);
}
}
private int getInt(final int index, final String key) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, false, this);
if (find != null) {
return getIntValue(find);
}
}
if ((object = object.getProto()) == null) {
break;
}
final ArrayData array = object.getArray();
if (array.has(index)) {
return array.getInt(index);
}
}
} else {
final FindProperty find = findProperty(key, true);
if (find != null) {
return getIntValue(find);
}
}
return JSType.toInt32(invokeNoSuchProperty(key));
}
@Override
public int getInt(final Object key) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getInt(index);
}
return getInt(index, JSType.toString(primitiveKey));
}
@Override
public int getInt(final double key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getInt(index);
}
return getInt(index, JSType.toString(key));
}
@Override
public int getInt(final long key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getInt(index);
}
return getInt(index, JSType.toString(key));
}
@Override
public int getInt(final int key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getInt(index);
}
return getInt(index, JSType.toString(key));
}
private long getLong(final int index, final String key) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, false, this);
if (find != null) {
return getLongValue(find);
}
}
if ((object = object.getProto()) == null) {
break;
}
final ArrayData array = object.getArray();
if (array.has(index)) {
return array.getLong(index);
}
}
} else {
final FindProperty find = findProperty(key, true);
if (find != null) {
return getLongValue(find);
}
}
return JSType.toLong(invokeNoSuchProperty(key));
}
@Override
public long getLong(final Object key) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getLong(index);
}
return getLong(index, JSType.toString(primitiveKey));
}
@Override
public long getLong(final double key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getLong(index);
}
return getLong(index, JSType.toString(key));
}
@Override
public long getLong(final long key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getLong(index);
}
return getLong(index, JSType.toString(key));
}
@Override
public long getLong(final int key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getLong(index);
}
return getLong(index, JSType.toString(key));
}
private double getDouble(final int index, final String key) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, false, this);
if (find != null) {
return getDoubleValue(find);
}
}
if ((object = object.getProto()) == null) {
break;
}
final ArrayData array = object.getArray();
if (array.has(index)) {
return array.getDouble(index);
}
}
} else {
final FindProperty find = findProperty(key, true);
if (find != null) {
return getDoubleValue(find);
}
}
return JSType.toNumber(invokeNoSuchProperty(key));
}
@Override
public double getDouble(final Object key) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getDouble(index);
}
return getDouble(index, JSType.toString(primitiveKey));
}
@Override
public double getDouble(final double key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getDouble(index);
}
return getDouble(index, JSType.toString(key));
}
@Override
public double getDouble(final long key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getDouble(index);
}
return getDouble(index, JSType.toString(key));
}
@Override
public double getDouble(final int key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getDouble(index);
}
return getDouble(index, JSType.toString(key));
}
private Object get(final int index, final String key) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, false, this);
if (find != null) {
return find.getObjectValue();
}
}
if ((object = object.getProto()) == null) {
break;
}
final ArrayData array = object.getArray();
if (array.has(index)) {
return array.getObject(index);
}
}
} else {
final FindProperty find = findProperty(key, true);
if (find != null) {
return find.getObjectValue();
}
}
return invokeNoSuchProperty(key);
}
@Override
public Object get(final Object key) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getObject(index);
}
return get(index, JSType.toString(primitiveKey));
}
@Override
public Object get(final double key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getObject(index);
}
return get(index, JSType.toString(key));
}
@Override
public Object get(final long key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getObject(index);
}
return get(index, JSType.toString(key));
}
@Override
public Object get(final int key) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return array.getObject(index);
}
return get(index, JSType.toString(key));
}
/**
* Handle when an array doesn't have a slot - possibly grow and/or convert array.
*
* @param index key as index
* @param value element value
* @param strict are we in strict mode
*/
private void doesNotHave(final int index, final Object value, final boolean strict) {
final long oldLength = getArray().length();
final long longIndex = ArrayIndex.toLongIndex(index);
if (getMap().containsArrayKeys()) {
final String key = JSType.toString(longIndex);
final FindProperty find = findProperty(key, true);
if (find != null) {
setObject(find, strict, key, value);
return;
}
}
if (longIndex >= oldLength) {
if (!isExtensible()) {
if (strict) {
throw typeError("object.non.extensible", JSType.toString(index), ScriptRuntime.safeToString(this));
}
return;
}
setArray(getArray().ensure(longIndex));
}
if (value instanceof Integer) {
setArray(getArray().set(index, (int)value, strict));
} else if (value instanceof Long) {
setArray(getArray().set(index, (long)value, strict));
} else if (value instanceof Double) {
setArray(getArray().set(index, (double)value, strict));
} else {
setArray(getArray().set(index, value, strict));
}
if (longIndex > oldLength) {
ArrayData array = getArray();
if (array.canDelete(oldLength, (longIndex - 1), strict)) {
array = array.delete(oldLength, (longIndex - 1));
}
setArray(array);
}
}
/**
* This is the most generic of all Object setters. Most of the others use this in some form.
* TODO: should be further specialized
*
* @param find found property
* @param strict are we in strict mode
* @param key property key
* @param value property value
*/
public final void setObject(final FindProperty find, final boolean strict, final String key, final Object value) {
FindProperty f = find;
if (f != null && f.isInherited() && !(f.getProperty() instanceof UserAccessorProperty) && !isScope()) {
// Setting a property should not modify the property in prototype unless this is a scope object.
f = null;
}
if (f != null) {
if (!f.getProperty().isWritable()) {
if (strict) {
throw typeError("property.not.writable", key, ScriptRuntime.safeToString(this));
}
return;
}
f.setObjectValue(value, strict);
} else if (!isExtensible()) {
if (strict) {
throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this));
}
} else {
ScriptObject sobj = this;
// undefined scope properties are set in the global object.
if (isScope()) {
while (sobj != null && !(sobj instanceof Global)) {
sobj = sobj.getProto();
}
assert sobj != null : "no parent global object in scope";
}
sobj.spill(key, value);
}
}
private void spill(final String key, final Object value) {
addSpillProperty(key, 0).setObjectValue(this, this, value, false);
}
@Override
public void set(final Object key, final int value, final boolean strict) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(primitiveKey);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final Object key, final long value, final boolean strict) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(primitiveKey);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final Object key, final double value, final boolean strict) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(primitiveKey);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final Object key, final Object value, final boolean strict) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(primitiveKey);
setObject(findProperty(propName, true), strict, propName, value);
}
@Override
public void set(final double key, final int value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final double key, final long value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final double key, final double value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final double key, final Object value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, value);
}
@Override
public void set(final long key, final int value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final long key, final long value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final long key, final double value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final long key, final Object value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, value);
}
@Override
public void set(final int key, final int value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final int key, final long value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final int key, final double value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, JSType.toObject(value));
}
@Override
public void set(final int key, final Object value, final boolean strict) {
final int index = getArrayIndex(key);
if (isValidArrayIndex(index)) {
if (getArray().has(index)) {
setArray(getArray().set(index, value, strict));
} else {
doesNotHave(index, value, strict);
}
return;
}
final String propName = JSType.toString(key);
setObject(findProperty(propName, true), strict, propName, value);
}
@Override
public boolean has(final Object key) {
final Object primitiveKey = JSType.toPrimitive(key);
final int index = getArrayIndex(primitiveKey);
return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), true);
}
@Override
public boolean has(final double key) {
final int index = getArrayIndex(key);
return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
}
@Override
public boolean has(final long key) {
final int index = getArrayIndex(key);
return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
}
@Override
public boolean has(final int key) {
final int index = getArrayIndex(key);
return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
}
private boolean hasArrayProperty(final int index) {
boolean hasArrayKeys = false;
for (ScriptObject self = this; self != null; self = self.getProto()) {
if (self.getArray().has(index)) {
return true;
}
hasArrayKeys = hasArrayKeys || self.getMap().containsArrayKeys();
}
return hasArrayKeys && hasProperty(ArrayIndex.toKey(index), true);
}
@Override
public boolean hasOwnProperty(final Object key) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), false);
}
@Override
public boolean hasOwnProperty(final int key) {
final int index = getArrayIndex(key);
return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
}
@Override
public boolean hasOwnProperty(final long key) {
final int index = getArrayIndex(key);
return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
}
@Override
public boolean hasOwnProperty(final double key) {
final int index = getArrayIndex(key);
return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
}
private boolean hasOwnArrayProperty(final int index) {
return getArray().has(index) || (getMap().containsArrayKeys() && hasProperty(ArrayIndex.toKey(index), false));
}
@Override
public boolean delete(final int key, final boolean strict) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
if (array.canDelete(index, strict)) {
setArray(array.delete(index));
return true;
}
return false;
}
return deleteObject(JSType.toObject(key), strict);
}
@Override
public boolean delete(final long key, final boolean strict) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
if (array.canDelete(index, strict)) {
setArray(array.delete(index));
return true;
}
return false;
}
return deleteObject(JSType.toObject(key), strict);
}
@Override
public boolean delete(final double key, final boolean strict) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
if (array.canDelete(index, strict)) {
setArray(array.delete(index));
return true;
}
return false;
}
return deleteObject(JSType.toObject(key), strict);
}
@Override
public boolean delete(final Object key, final boolean strict) {
final Object primitiveKey = JSType.toPrimitive(key, String.class);
final int index = getArrayIndex(primitiveKey);
final ArrayData array = getArray();
if (array.has(index)) {
if (array.canDelete(index, strict)) {
setArray(array.delete(index));
return true;
}
return false;
}
return deleteObject(primitiveKey, strict);
}
private boolean deleteObject(final Object key, final boolean strict) {
final String propName = JSType.toString(key);
final FindProperty find = findProperty(propName, false);
if (find == null) {
return true;
}
if (!find.getProperty().isConfigurable()) {
if (strict) {
throw typeError("cant.delete.property", propName, ScriptRuntime.safeToString(this));
}
return false;
}
final Property prop = find.getProperty();
deleteOwnProperty(prop);
return true;
}
/**
* Make a new UserAccessorProperty property. getter and setter functions are stored in
* this ScriptObject and slot values are used in property object.
*
* @param key the property name
* @param propertyFlags attribute flags of the property
* @param getter getter function for the property
* @param setter setter function for the property
* @return the newly created UserAccessorProperty
*/
protected final UserAccessorProperty newUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
final UserAccessorProperty property = getMap().newUserAccessors(key, propertyFlags);
setSpill(property.getGetterSlot(), getter);
setSpill(property.getSetterSlot(), setter);
return property;
}
/**
* Write a value to a spill slot
* @param slot the slot index
* @param value the value
*/
protected final void setSpill(final int slot, final Object value) {
if (spill == null) {
// create new spill.
spill = new Object[Math.max(slot + 1, SPILL_RATE)];
} else if (slot >= spill.length) {
// grow spill as needed
final Object[] newSpill = new Object[slot + 1];
System.arraycopy(spill, 0, newSpill, 0, spill.length);
spill = newSpill;
}
spill[slot] = value;
}
/**
* Get a value from a spill slot
* @param slot the slot index
* @return the value in the spill slot with the given index
*/
protected Object getSpill(final int slot) {
return spill != null && slot < spill.length ? spill[slot] : null;
}
private static MethodHandle findOwnMH(final String name, final Class rtype, final Class... types) {
final Class own = ScriptObject.class;
final MethodType mt = MH.type(rtype, types);
try {
return MH.findStatic(MethodHandles.lookup(), own, name, mt);
} catch (final MethodHandleFactory.LookupException e) {
return MH.findVirtual(MethodHandles.lookup(), own, name, mt);
}
}
private static MethodHandle getKnownFunctionPropertyGuard(final PropertyMap map, final MethodHandle getter, final Object where, final ScriptFunction func) {
return MH.insertArguments(KNOWNFUNCPROPGUARD, 1, map, getter, where, func);
}
@SuppressWarnings("unused")
private static boolean knownFunctionPropertyGuard(final Object self, final PropertyMap map, final MethodHandle getter, final Object where, final ScriptFunction func) {
if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) {
try {
return getter.invokeExact(where) == func;
} catch (final RuntimeException | Error e) {
throw e;
} catch (final Throwable t) {
throw new RuntimeException(t);
}
}
return false;
}
/** This is updated only in debug mode - counts number of {@code ScriptObject} instances created */
private static int count;
/** This is updated only in debug mode - counts number of {@code ScriptObject} instances created that are scope */
private static int scopeCount;
/**
* Get number of {@code ScriptObject} instances created. If not running in debug
* mode this is always 0
*
* @return number of ScriptObjects created
*/
public static int getCount() {
return count;
}
/**
* Get number of scope {@code ScriptObject} instances created. If not running in debug
* mode this is always 0
*
* @return number of scope ScriptObjects created
*/
public static int getScopeCount() {
return scopeCount;
}
}