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src/java.base/share/classes/java/lang/Class.java
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*** 49,59 ****
import java.io.ObjectStreamField;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
- import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Set;
--- 49,58 ----
*** 532,542 ****
"Can not call newInstance() on the Class for java.lang.Class"
);
}
try {
Class<?>[] empty = {};
! final Constructor<T> c = getConstructor0(empty, Member.DECLARED);
// Disable accessibility checks on the constructor
// since we have to do the security check here anyway
// (the stack depth is wrong for the Constructor's
// security check to work)
java.security.AccessController.doPrivileged(
--- 531,542 ----
"Can not call newInstance() on the Class for java.lang.Class"
);
}
try {
Class<?>[] empty = {};
! final Constructor<T> c = getReflectionFactory().copyConstructor(
! getConstructor0(empty, Member.DECLARED));
// Disable accessibility checks on the constructor
// since we have to do the security check here anyway
// (the stack depth is wrong for the Constructor's
// security check to work)
java.security.AccessController.doPrivileged(
*** 1024,1045 ****
* returned in that order.
*
* @return an array of interfaces directly implemented by this class
*/
public Class<?>[] getInterfaces() {
ReflectionData<T> rd = reflectionData();
if (rd == null) {
// no cloning required
return getInterfaces0();
} else {
Class<?>[] interfaces = rd.interfaces;
if (interfaces == null) {
interfaces = getInterfaces0();
rd.interfaces = interfaces;
}
! // defensively copy before handing over to user code
! return interfaces.clone();
}
}
private native Class<?>[] getInterfaces0();
--- 1024,1050 ----
* returned in that order.
*
* @return an array of interfaces directly implemented by this class
*/
public Class<?>[] getInterfaces() {
+ // defensively copy before handing over to user code
+ return getInterfaces(true);
+ }
+
+ private Class<?>[] getInterfaces(boolean cloneArray) {
ReflectionData<T> rd = reflectionData();
if (rd == null) {
// no cloning required
return getInterfaces0();
} else {
Class<?>[] interfaces = rd.interfaces;
if (interfaces == null) {
interfaces = getInterfaces0();
rd.interfaces = interfaces;
}
! // defensively copy if requested
! return cloneArray ? interfaces.clone() : interfaces;
}
}
private native Class<?>[] getInterfaces0();
*** 1888,1898 ****
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
Field field = getField0(name);
if (field == null) {
throw new NoSuchFieldException(name);
}
! return field;
}
/**
* Returns a {@code Method} object that reflects the specified public
--- 1893,1903 ----
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
Field field = getField0(name);
if (field == null) {
throw new NoSuchFieldException(name);
}
! return getReflectionFactory().copyField(field);
}
/**
* Returns a {@code Method} object that reflects the specified public
*** 1967,1981 ****
*/
@CallerSensitive
public Method getMethod(String name, Class<?>... parameterTypes)
throws NoSuchMethodException, SecurityException {
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
! Method method = getMethod0(name, parameterTypes, true);
if (method == null) {
throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
}
! return method;
}
/**
* Returns a {@code Constructor} object that reflects the specified
--- 1972,1986 ----
*/
@CallerSensitive
public Method getMethod(String name, Class<?>... parameterTypes)
throws NoSuchMethodException, SecurityException {
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
! Method method = getMethod0(name, parameterTypes);
if (method == null) {
throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
}
! return getReflectionFactory().copyMethod(method);
}
/**
* Returns a {@code Constructor} object that reflects the specified
*** 2008,2018 ****
*/
@CallerSensitive
public Constructor<T> getConstructor(Class<?>... parameterTypes)
throws NoSuchMethodException, SecurityException {
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
! return getConstructor0(parameterTypes, Member.PUBLIC);
}
/**
* Returns an array of {@code Class} objects reflecting all the
--- 2013,2024 ----
*/
@CallerSensitive
public Constructor<T> getConstructor(Class<?>... parameterTypes)
throws NoSuchMethodException, SecurityException {
checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
! return getReflectionFactory().copyConstructor(
! getConstructor0(parameterTypes, Member.PUBLIC));
}
/**
* Returns an array of {@code Class} objects reflecting all the
*** 2255,2265 ****
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
Field field = searchFields(privateGetDeclaredFields(false), name);
if (field == null) {
throw new NoSuchFieldException(name);
}
! return field;
}
/**
* Returns a {@code Method} object that reflects the specified
--- 2261,2271 ----
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
Field field = searchFields(privateGetDeclaredFields(false), name);
if (field == null) {
throw new NoSuchFieldException(name);
}
! return getReflectionFactory().copyField(field);
}
/**
* Returns a {@code Method} object that reflects the specified
*** 2315,2325 ****
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
Method method = searchMethods(privateGetDeclaredMethods(false), name, parameterTypes);
if (method == null) {
throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
}
! return method;
}
/**
* Returns a {@code Constructor} object that reflects the specified
--- 2321,2331 ----
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
Method method = searchMethods(privateGetDeclaredMethods(false), name, parameterTypes);
if (method == null) {
throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
}
! return getReflectionFactory().copyMethod(method);
}
/**
* Returns a {@code Constructor} object that reflects the specified
*** 2361,2371 ****
*/
@CallerSensitive
public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)
throws NoSuchMethodException, SecurityException {
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
! return getConstructor0(parameterTypes, Member.DECLARED);
}
/**
* Finds a resource with a given name. If this class is in a named {@link
* Module Module}, and the caller of this method is in the same module,
--- 2367,2378 ----
*/
@CallerSensitive
public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)
throws NoSuchMethodException, SecurityException {
checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
! return getReflectionFactory().copyConstructor(
! getConstructor0(parameterTypes, Member.DECLARED));
}
/**
* Finds a resource with a given name. If this class is in a named {@link
* Module Module}, and the caller of this method is in the same module,
*** 2954,3137 ****
}
}
return res;
}
- static class MethodArray {
- // Don't add or remove methods except by add() or remove() calls.
- private Method[] methods;
- private int length;
- private int defaults;
-
- MethodArray() {
- this(20);
- }
-
- MethodArray(int initialSize) {
- if (initialSize < 2)
- throw new IllegalArgumentException("Size should be 2 or more");
-
- methods = new Method[initialSize];
- length = 0;
- defaults = 0;
- }
-
- boolean hasDefaults() {
- return defaults != 0;
- }
-
- void add(Method m) {
- if (length == methods.length) {
- methods = Arrays.copyOf(methods, 2 * methods.length);
- }
- methods[length++] = m;
-
- if (m != null && m.isDefault())
- defaults++;
- }
-
- void addAll(Method[] ma) {
- for (Method m : ma) {
- add(m);
- }
- }
-
- void addAll(MethodArray ma) {
- for (int i = 0; i < ma.length(); i++) {
- add(ma.get(i));
- }
- }
-
- void addIfNotPresent(Method newMethod) {
- for (int i = 0; i < length; i++) {
- Method m = methods[i];
- if (m == newMethod || (m != null && m.equals(newMethod))) {
- return;
- }
- }
- add(newMethod);
- }
-
- void addAllIfNotPresent(MethodArray newMethods) {
- for (int i = 0; i < newMethods.length(); i++) {
- Method m = newMethods.get(i);
- if (m != null) {
- addIfNotPresent(m);
- }
- }
- }
-
- /* Add Methods declared in an interface to this MethodArray.
- * Static methods declared in interfaces are not inherited.
- */
- void addInterfaceMethods(Method[] methods) {
- for (Method candidate : methods) {
- if (!Modifier.isStatic(candidate.getModifiers())) {
- add(candidate);
- }
- }
- }
-
- int length() {
- return length;
- }
-
- Method get(int i) {
- return methods[i];
- }
-
- Method getFirst() {
- for (Method m : methods)
- if (m != null)
- return m;
- return null;
- }
-
- void removeByNameAndDescriptor(Method toRemove) {
- for (int i = 0; i < length; i++) {
- Method m = methods[i];
- if (m != null && matchesNameAndDescriptor(m, toRemove)) {
- remove(i);
- }
- }
- }
-
- private void remove(int i) {
- if (methods[i] != null && methods[i].isDefault())
- defaults--;
- methods[i] = null;
- }
-
- private boolean matchesNameAndDescriptor(Method m1, Method m2) {
- return m1.getReturnType() == m2.getReturnType() &&
- m1.getName() == m2.getName() && // name is guaranteed to be interned
- arrayContentsEq(m1.getParameterTypes(),
- m2.getParameterTypes());
- }
-
- void compactAndTrim() {
- int newPos = 0;
- // Get rid of null slots
- for (int pos = 0; pos < length; pos++) {
- Method m = methods[pos];
- if (m != null) {
- if (pos != newPos) {
- methods[newPos] = m;
- }
- newPos++;
- }
- }
- if (newPos != methods.length) {
- methods = Arrays.copyOf(methods, newPos);
- }
- }
-
- /* Removes all Methods from this MethodArray that have a more specific
- * default Method in this MethodArray.
- *
- * Users of MethodArray are responsible for pruning Methods that have
- * a more specific <em>concrete</em> Method.
- */
- void removeLessSpecifics() {
- if (!hasDefaults())
- return;
-
- for (int i = 0; i < length; i++) {
- Method m = get(i);
- if (m == null || !m.isDefault())
- continue;
-
- for (int j = 0; j < length; j++) {
- if (i == j)
- continue;
-
- Method candidate = get(j);
- if (candidate == null)
- continue;
-
- if (!matchesNameAndDescriptor(m, candidate))
- continue;
-
- if (hasMoreSpecificClass(m, candidate))
- remove(j);
- }
- }
- }
-
- Method[] getArray() {
- return methods;
- }
-
- // Returns true if m1 is more specific than m2
- static boolean hasMoreSpecificClass(Method m1, Method m2) {
- Class<?> m1Class = m1.getDeclaringClass();
- Class<?> m2Class = m2.getDeclaringClass();
- return m1Class != m2Class && m2Class.isAssignableFrom(m1Class);
- }
- }
-
-
// Returns an array of "root" methods. These Method objects must NOT
// be propagated to the outside world, but must instead be copied
// via ReflectionFactory.copyMethod.
private Method[] privateGetPublicMethods() {
checkInitted();
--- 2961,2970 ----
*** 3141,3195 ****
res = rd.publicMethods;
if (res != null) return res;
}
// No cached value available; compute value recursively.
! // Start by fetching public declared methods
! MethodArray methods = new MethodArray();
! {
! Method[] tmp = privateGetDeclaredMethods(true);
! methods.addAll(tmp);
}
! // Now recur over superclass and direct superinterfaces.
! // Go over superinterfaces first so we can more easily filter
! // out concrete implementations inherited from superclasses at
! // the end.
! MethodArray inheritedMethods = new MethodArray();
! for (Class<?> i : getInterfaces()) {
! inheritedMethods.addInterfaceMethods(i.privateGetPublicMethods());
}
! if (!isInterface()) {
! Class<?> c = getSuperclass();
! if (c != null) {
! MethodArray supers = new MethodArray();
! supers.addAll(c.privateGetPublicMethods());
! // Filter out concrete implementations of any
! // interface methods
! for (int i = 0; i < supers.length(); i++) {
! Method m = supers.get(i);
! if (m != null &&
! !Modifier.isAbstract(m.getModifiers()) &&
! !m.isDefault()) {
! inheritedMethods.removeByNameAndDescriptor(m);
! }
! }
! // Insert superclass's inherited methods before
! // superinterfaces' to satisfy getMethod's search
! // order
! supers.addAll(inheritedMethods);
! inheritedMethods = supers;
! }
! }
! // Filter out all local methods from inherited ones
! for (int i = 0; i < methods.length(); i++) {
! Method m = methods.get(i);
! inheritedMethods.removeByNameAndDescriptor(m);
! }
! methods.addAllIfNotPresent(inheritedMethods);
! methods.removeLessSpecifics();
! methods.compactAndTrim();
! res = methods.getArray();
if (rd != null) {
rd.publicMethods = res;
}
return res;
}
--- 2974,3006 ----
res = rd.publicMethods;
if (res != null) return res;
}
// No cached value available; compute value recursively.
! // Start by fetching public declared methods...
! PublicMethods pms = new PublicMethods();
! for (Method m : privateGetDeclaredMethods(/* publicOnly */ true)) {
! pms.consolidate(m);
}
! // ...then recur over superclass methods...
! Class<?> sc = getSuperclass();
! if (sc != null) {
! for (Method m : sc.privateGetPublicMethods()) {
! pms.consolidate(m);
}
! }
! // ...and finally over direct superinterfaces.
! for (Class<?> intf : getInterfaces(/* cloneArray */ false)) {
! for (Method m : intf.privateGetPublicMethods()) {
! // static interface methods are not inherited
! if (!Modifier.isStatic(m.getModifiers())) {
! pms.consolidate(m);
! }
! }
! }
!
! res = pms.toArray();
if (rd != null) {
rd.publicMethods = res;
}
return res;
}
*** 3197,3217 ****
//
// Helpers for fetchers of one field, method, or constructor
//
private static Field searchFields(Field[] fields, String name) {
- String internedName = name.intern();
for (Field field : fields) {
! if (field.getName() == internedName) {
! return getReflectionFactory().copyField(field);
}
}
return null;
}
! private Field getField0(String name) throws NoSuchFieldException {
// Note: the intent is that the search algorithm this routine
// uses be equivalent to the ordering imposed by
// privateGetPublicFields(). It fetches only the declared
// public fields for each class, however, to reduce the number
// of Field objects which have to be created for the common
--- 3008,3031 ----
//
// Helpers for fetchers of one field, method, or constructor
//
+ // This method does not copy the returned Field object!
private static Field searchFields(Field[] fields, String name) {
for (Field field : fields) {
! if (field.getName().equals(name)) {
! return field;
}
}
return null;
}
! // Returns a "root" Field object. This Field object must NOT
! // be propagated to the outside world, but must instead be copied
! // via ReflectionFactory.copyField.
! private Field getField0(String name) {
// Note: the intent is that the search algorithm this routine
// uses be equivalent to the ordering imposed by
// privateGetPublicFields(). It fetches only the declared
// public fields for each class, however, to reduce the number
// of Field objects which have to be created for the common
*** 3221,3231 ****
// Search declared public fields
if ((res = searchFields(privateGetDeclaredFields(true), name)) != null) {
return res;
}
// Direct superinterfaces, recursively
! Class<?>[] interfaces = getInterfaces();
for (Class<?> c : interfaces) {
if ((res = c.getField0(name)) != null) {
return res;
}
}
--- 3035,3045 ----
// Search declared public fields
if ((res = searchFields(privateGetDeclaredFields(true), name)) != null) {
return res;
}
// Direct superinterfaces, recursively
! Class<?>[] interfaces = getInterfaces(/* cloneArray */ false);
for (Class<?> c : interfaces) {
if ((res = c.getField0(name)) != null) {
return res;
}
}
*** 3239,3329 ****
}
}
return null;
}
private static Method searchMethods(Method[] methods,
String name,
Class<?>[] parameterTypes)
{
Method res = null;
- String internedName = name.intern();
for (Method m : methods) {
! if (m.getName() == internedName
! && arrayContentsEq(parameterTypes, m.getParameterTypes())
&& (res == null
! || res.getReturnType().isAssignableFrom(m.getReturnType())))
res = m;
}
!
! return (res == null ? res : getReflectionFactory().copyMethod(res));
}
! private Method getMethod0(String name, Class<?>[] parameterTypes, boolean includeStaticMethods) {
! MethodArray interfaceCandidates = new MethodArray(2);
! Method res = privateGetMethodRecursive(name, parameterTypes, includeStaticMethods, interfaceCandidates);
! if (res != null)
! return res;
! // Not found on class or superclass directly
! interfaceCandidates.removeLessSpecifics();
! return interfaceCandidates.getFirst(); // may be null
}
! private Method privateGetMethodRecursive(String name,
Class<?>[] parameterTypes,
! boolean includeStaticMethods,
! MethodArray allInterfaceCandidates) {
! // Note: the intent is that the search algorithm this routine
! // uses be equivalent to the ordering imposed by
! // privateGetPublicMethods(). It fetches only the declared
! // public methods for each class, however, to reduce the
! // number of Method objects which have to be created for the
! // common case where the method being requested is declared in
! // the class which is being queried.
! //
! // Due to default methods, unless a method is found on a superclass,
! // methods declared in any superinterface needs to be considered.
! // Collect all candidates declared in superinterfaces in {@code
! // allInterfaceCandidates} and select the most specific if no match on
! // a superclass is found.
!
! // Must _not_ return root methods
! Method res;
! // Search declared public methods
! if ((res = searchMethods(privateGetDeclaredMethods(true),
! name,
! parameterTypes)) != null) {
! if (includeStaticMethods || !Modifier.isStatic(res.getModifiers()))
! return res;
! }
! // Search superclass's methods
! if (!isInterface()) {
! Class<? super T> c = getSuperclass();
! if (c != null) {
! if ((res = c.getMethod0(name, parameterTypes, true)) != null) {
return res;
}
}
}
! // Search superinterfaces' methods
! Class<?>[] interfaces = getInterfaces();
! for (Class<?> c : interfaces)
! if ((res = c.getMethod0(name, parameterTypes, false)) != null)
! allInterfaceCandidates.add(res);
! // Not found
! return null;
}
private Constructor<T> getConstructor0(Class<?>[] parameterTypes,
int which) throws NoSuchMethodException
{
Constructor<T>[] constructors = privateGetDeclaredConstructors((which == Member.PUBLIC));
for (Constructor<T> constructor : constructors) {
if (arrayContentsEq(parameterTypes,
! constructor.getParameterTypes())) {
! return getReflectionFactory().copyConstructor(constructor);
}
}
throw new NoSuchMethodException(getName() + ".<init>" + argumentTypesToString(parameterTypes));
}
--- 3053,3141 ----
}
}
return null;
}
+ // This method does not copy the returned Method object!
private static Method searchMethods(Method[] methods,
String name,
Class<?>[] parameterTypes)
{
+ ReflectionFactory fact = getReflectionFactory();
Method res = null;
for (Method m : methods) {
! if (m.getName().equals(name)
! && arrayContentsEq(parameterTypes,
! fact.getExecutableSharedParameterTypes(m))
&& (res == null
! || (res.getReturnType() != m.getReturnType()
! && res.getReturnType().isAssignableFrom(m.getReturnType()))))
res = m;
}
! return res;
}
! private static final Class<?>[] EMPTY_CLASS_ARRAY = new Class<?>[0];
! // Returns a "root" Method object. This Method object must NOT
! // be propagated to the outside world, but must instead be copied
! // via ReflectionFactory.copyMethod.
! private Method getMethod0(String name, Class<?>[] parameterTypes) {
! PublicMethods.MethodList res = getMethodsRecursive(
! name,
! parameterTypes == null ? EMPTY_CLASS_ARRAY : parameterTypes,
! /* includeStatic */ true);
! return res == null ? null : res.getMostSpecific();
}
! // Returns a list of "root" Method objects. These Method objects must NOT
! // be propagated to the outside world, but must instead be copied
! // via ReflectionFactory.copyMethod.
! private PublicMethods.MethodList getMethodsRecursive(String name,
Class<?>[] parameterTypes,
! boolean includeStatic) {
! // 1st check declared public methods
! Method[] methods = privateGetDeclaredMethods(/* publicOnly */ true);
! PublicMethods.MethodList res = PublicMethods.MethodList
! .filter(methods, name, parameterTypes, includeStatic);
! // if there is at least one match among declared methods, we need not
! // search any further as such match surely overrides matching methods
! // declared in superclass(es) or interface(s).
! if (res != null) {
return res;
}
+
+ // if there was no match among declared methods,
+ // we must consult the superclass (if any) recursively...
+ Class<?> sc = getSuperclass();
+ if (sc != null) {
+ res = sc.getMethodsRecursive(name, parameterTypes, includeStatic);
}
+
+ // ...and consolidate the superclass methods with methods obtained
+ // from directly implemented interfaces excluding static methods...
+ for (Class<?> intf : getInterfaces(/* cloneArray */ false)) {
+ res = PublicMethods.MethodList.consolidate(
+ res, intf.getMethodsRecursive(name, parameterTypes,
+ /* includeStatic */ false));
}
!
! return res;
}
+ // Returns a "root" Constructor object. This Constructor object must NOT
+ // be propagated to the outside world, but must instead be copied
+ // via ReflectionFactory.copyConstructor.
private Constructor<T> getConstructor0(Class<?>[] parameterTypes,
int which) throws NoSuchMethodException
{
+ ReflectionFactory fact = getReflectionFactory();
Constructor<T>[] constructors = privateGetDeclaredConstructors((which == Member.PUBLIC));
for (Constructor<T> constructor : constructors) {
if (arrayContentsEq(parameterTypes,
! fact.getExecutableSharedParameterTypes(constructor))) {
! return constructor;
}
}
throw new NoSuchMethodException(getName() + ".<init>" + argumentTypesToString(parameterTypes));
}
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