src/share/classes/java/lang/reflect/Method.java
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
@@ -34,11 +34,10 @@
import sun.reflect.annotation.AnnotationType;
import sun.reflect.annotation.AnnotationParser;
import java.lang.annotation.Annotation;
import java.lang.annotation.AnnotationFormatError;
import java.nio.ByteBuffer;
-import java.util.Map;
/**
* A {@code Method} provides information about, and access to, a single method
* on a class or interface. The reflected method may be a class method
* or an instance method (including an abstract method).
@@ -56,13 +55,11 @@
* @see java.lang.Class#getDeclaredMethod(String, Class[])
*
* @author Kenneth Russell
* @author Nakul Saraiya
*/
-public final
- class Method extends AccessibleObject implements GenericDeclaration,
- Member {
+public final class Method extends Executable {
private Class<?> clazz;
private int slot;
// This is guaranteed to be interned by the VM in the 1.4
// reflection implementation
private String name;
@@ -81,22 +78,23 @@
// For sharing of MethodAccessors. This branching structure is
// currently only two levels deep (i.e., one root Method and
// potentially many Method objects pointing to it.)
private Method root;
- // Generics infrastructure
+ // Generics infrastructure
private String getGenericSignature() {return signature;}
// Accessor for factory
private GenericsFactory getFactory() {
// create scope and factory
return CoreReflectionFactory.make(this, MethodScope.make(this));
}
// Accessor for generic info repository
- private MethodRepository getGenericInfo() {
+ @Override
+ MethodRepository getGenericInfo() {
// lazily initialize repository if necessary
if (genericInfo == null) {
// create and cache generic info repository
genericInfo = MethodRepository.make(getGenericSignature(),
getFactory());
@@ -117,12 +115,11 @@
int modifiers,
int slot,
String signature,
byte[] annotations,
byte[] parameterAnnotations,
- byte[] annotationDefault)
- {
+ byte[] annotationDefault) {
this.clazz = declaringClass;
this.name = name;
this.parameterTypes = parameterTypes;
this.returnType = returnType;
this.exceptionTypes = checkedExceptions;
@@ -154,52 +151,50 @@
// Might as well eagerly propagate this if already present
res.methodAccessor = methodAccessor;
return res;
}
+ @Override
+ boolean hasGenericInformation() {
+ return (getGenericSignature() != null);
+ }
+
+ @Override
+ byte[] getAnnotationBytes() {
+ return annotations;
+ }
+
/**
- * Returns the {@code Class} object representing the class or interface
- * that declares the method represented by this {@code Method} object.
+ * {@inheritDoc}
*/
+ @Override
public Class<?> getDeclaringClass() {
return clazz;
}
/**
* Returns the name of the method represented by this {@code Method}
* object, as a {@code String}.
*/
+ @Override
public String getName() {
return name;
}
/**
- * Returns the Java language modifiers for the method represented
- * by this {@code Method} object, as an integer. The {@code Modifier} class should
- * be used to decode the modifiers.
- *
- * @see Modifier
+ * {@inheritDoc}
*/
+ @Override
public int getModifiers() {
return modifiers;
}
/**
- * Returns an array of {@code TypeVariable} objects that represent the
- * type variables declared by the generic declaration represented by this
- * {@code GenericDeclaration} object, in declaration order. Returns an
- * array of length 0 if the underlying generic declaration declares no type
- * variables.
- *
- * @return an array of {@code TypeVariable} objects that represent
- * the type variables declared by this generic declaration
- * @throws GenericSignatureFormatError if the generic
- * signature of this generic declaration does not conform to
- * the format specified in
- * <cite>The Java™ Virtual Machine Specification</cite>
+ * {@inheritDoc}
* @since 1.5
*/
+ @Override
public TypeVariable<Method>[] getTypeParameters() {
if (getGenericSignature() != null)
return (TypeVariable<Method>[])getGenericInfo().getTypeParameters();
else
return (TypeVariable<Method>[])new TypeVariable[0];
@@ -243,102 +238,43 @@
if (getGenericSignature() != null) {
return getGenericInfo().getReturnType();
} else { return getReturnType();}
}
-
/**
- * Returns an array of {@code Class} objects that represent the formal
- * parameter types, in declaration order, of the method
- * represented by this {@code Method} object. Returns an array of length
- * 0 if the underlying method takes no parameters.
- *
- * @return the parameter types for the method this object
- * represents
+ * {@inheritDoc}
*/
+ @Override
public Class<?>[] getParameterTypes() {
return (Class<?>[]) parameterTypes.clone();
}
/**
- * Returns an array of {@code Type} objects that represent the formal
- * parameter types, in declaration order, of the method represented by
- * this {@code Method} object. Returns an array of length 0 if the
- * underlying method takes no parameters.
- *
- * <p>If a formal parameter type is a parameterized type,
- * the {@code Type} object returned for it must accurately reflect
- * the actual type parameters used in the source code.
- *
- * <p>If a formal parameter type is a type variable or a parameterized
- * type, it is created. Otherwise, it is resolved.
- *
- * @return an array of Types that represent the formal
- * parameter types of the underlying method, in declaration order
- * @throws GenericSignatureFormatError
- * if the generic method signature does not conform to the format
- * specified in
- * <cite>The Java™ Virtual Machine Specification</cite>
- * @throws TypeNotPresentException if any of the parameter
- * types of the underlying method refers to a non-existent type
- * declaration
- * @throws MalformedParameterizedTypeException if any of
- * the underlying method's parameter types refer to a parameterized
- * type that cannot be instantiated for any reason
+ * {@inheritDoc}
* @since 1.5
*/
+ @Override
public Type[] getGenericParameterTypes() {
- if (getGenericSignature() != null)
- return getGenericInfo().getParameterTypes();
- else
- return getParameterTypes();
+ return super.getGenericParameterTypes();
}
-
/**
- * Returns an array of {@code Class} objects that represent
- * the types of the exceptions declared to be thrown
- * by the underlying method
- * represented by this {@code Method} object. Returns an array of length
- * 0 if the method declares no exceptions in its {@code throws} clause.
- *
- * @return the exception types declared as being thrown by the
- * method this object represents
+ * {@inheritDoc}
+ * @since 1.5
*/
+ @Override
public Class<?>[] getExceptionTypes() {
return (Class<?>[]) exceptionTypes.clone();
}
/**
- * Returns an array of {@code Type} objects that represent the
- * exceptions declared to be thrown by this {@code Method} object.
- * Returns an array of length 0 if the underlying method declares
- * no exceptions in its {@code throws} clause.
- *
- * <p>If an exception type is a type variable or a parameterized
- * type, it is created. Otherwise, it is resolved.
- *
- * @return an array of Types that represent the exception types
- * thrown by the underlying method
- * @throws GenericSignatureFormatError
- * if the generic method signature does not conform to the format
- * specified in
- * <cite>The Java™ Virtual Machine Specification</cite>
- * @throws TypeNotPresentException if the underlying method's
- * {@code throws} clause refers to a non-existent type declaration
- * @throws MalformedParameterizedTypeException if
- * the underlying method's {@code throws} clause refers to a
- * parameterized type that cannot be instantiated for any reason
+ * {@inheritDoc}
* @since 1.5
*/
+ @Override
public Type[] getGenericExceptionTypes() {
- Type[] result;
- if (getGenericSignature() != null &&
- ((result = getGenericInfo().getExceptionTypes()).length > 0))
- return result;
- else
- return getExceptionTypes();
+ return super.getGenericExceptionTypes();
}
/**
* Compares this {@code Method} against the specified object. Returns
* true if the objects are the same. Two {@code Methods} are the same if
@@ -350,20 +286,11 @@
Method other = (Method)obj;
if ((getDeclaringClass() == other.getDeclaringClass())
&& (getName() == other.getName())) {
if (!returnType.equals(other.getReturnType()))
return false;
- /* Avoid unnecessary cloning */
- Class<?>[] params1 = parameterTypes;
- Class<?>[] params2 = other.parameterTypes;
- if (params1.length == params2.length) {
- for (int i = 0; i < params1.length; i++) {
- if (params1[i] != params2[i])
- return false;
- }
- return true;
- }
+ return equalParamTypes(parameterTypes, other.parameterTypes);
}
}
return false;
}
@@ -397,39 +324,20 @@
* and then other modifiers in the following order:
* {@code abstract}, {@code static}, {@code final},
* {@code synchronized}, {@code native}, {@code strictfp}.
*/
public String toString() {
- try {
- StringBuilder sb = new StringBuilder();
- int mod = getModifiers() & Modifier.methodModifiers();
- if (mod != 0) {
- sb.append(Modifier.toString(mod)).append(' ');
+ return sharedToString(Modifier.methodModifiers(),
+ parameterTypes,
+ exceptionTypes);
}
+
+ @Override
+ void specificToStringHeader(StringBuilder sb) {
sb.append(Field.getTypeName(getReturnType())).append(' ');
sb.append(Field.getTypeName(getDeclaringClass())).append('.');
- sb.append(getName()).append('(');
- Class<?>[] params = parameterTypes; // avoid clone
- for (int j = 0; j < params.length; j++) {
- sb.append(Field.getTypeName(params[j]));
- if (j < (params.length - 1))
- sb.append(',');
- }
- sb.append(')');
- Class<?>[] exceptions = exceptionTypes; // avoid clone
- if (exceptions.length > 0) {
- sb.append(" throws ");
- for (int k = 0; k < exceptions.length; k++) {
- sb.append(exceptions[k].getName());
- if (k < (exceptions.length - 1))
- sb.append(',');
- }
- }
- return sb.toString();
- } catch (Exception e) {
- return "<" + e + ">";
- }
+ sb.append(getName());
}
/**
* Returns a string describing this {@code Method}, including
* type parameters. The string is formatted as the method access
@@ -466,66 +374,24 @@
* @return a string describing this {@code Method},
* include type parameters
*
* @since 1.5
*/
+ @Override
public String toGenericString() {
- try {
- StringBuilder sb = new StringBuilder();
- int mod = getModifiers() & Modifier.methodModifiers();
- if (mod != 0) {
- sb.append(Modifier.toString(mod)).append(' ');
- }
- TypeVariable<?>[] typeparms = getTypeParameters();
- if (typeparms.length > 0) {
- boolean first = true;
- sb.append('<');
- for(TypeVariable<?> typeparm: typeparms) {
- if (!first)
- sb.append(',');
- // Class objects can't occur here; no need to test
- // and call Class.getName().
- sb.append(typeparm.toString());
- first = false;
- }
- sb.append("> ");
+ return sharedToGenericString(Modifier.methodModifiers());
}
+ @Override
+ void specificToGenericStringHeader(StringBuilder sb) {
Type genRetType = getGenericReturnType();
sb.append( ((genRetType instanceof Class<?>)?
Field.getTypeName((Class<?>)genRetType):genRetType.toString()))
.append(' ');
sb.append(Field.getTypeName(getDeclaringClass())).append('.');
- sb.append(getName()).append('(');
- Type[] params = getGenericParameterTypes();
- for (int j = 0; j < params.length; j++) {
- String param = (params[j] instanceof Class)?
- Field.getTypeName((Class)params[j]):
- (params[j].toString());
- if (isVarArgs() && (j == params.length - 1)) // replace T[] with T...
- param = param.replaceFirst("\\[\\]$", "...");
- sb.append(param);
- if (j < (params.length - 1))
- sb.append(',');
- }
- sb.append(')');
- Type[] exceptions = getGenericExceptionTypes();
- if (exceptions.length > 0) {
- sb.append(" throws ");
- for (int k = 0; k < exceptions.length; k++) {
- sb.append((exceptions[k] instanceof Class)?
- ((Class)exceptions[k]).getName():
- exceptions[k].toString());
- if (k < (exceptions.length - 1))
- sb.append(',');
- }
- }
- return sb.toString();
- } catch (Exception e) {
- return "<" + e + ">";
- }
+ sb.append(getName());
}
/**
* Invokes the underlying method represented by this {@code Method}
* object, on the specified object with the specified parameters.
@@ -612,32 +478,25 @@
public boolean isBridge() {
return (getModifiers() & Modifier.BRIDGE) != 0;
}
/**
- * Returns {@code true} if this method was declared to take
- * a variable number of arguments; returns {@code false}
- * otherwise.
- *
- * @return {@code true} if an only if this method was declared to
- * take a variable number of arguments.
+ * {@inheritDoc}
* @since 1.5
*/
+ @Override
public boolean isVarArgs() {
- return (getModifiers() & Modifier.VARARGS) != 0;
+ return super.isVarArgs();
}
/**
- * Returns {@code true} if this method is a synthetic
- * method; returns {@code false} otherwise.
- *
- * @return true if and only if this method is a synthetic
- * method as defined by the Java Language Specification.
+ * {@inheritDoc}
* @since 1.5
*/
+ @Override
public boolean isSynthetic() {
- return Modifier.isSynthetic(getModifiers());
+ return super.isSynthetic();
}
// NOTE that there is no synchronization used here. It is correct
// (though not efficient) to generate more than one MethodAccessor
// for a given Method. However, avoiding synchronization will
@@ -673,40 +532,10 @@
root.setMethodAccessor(accessor);
}
}
/**
- * @throws NullPointerException {@inheritDoc}
- * @since 1.5
- */
- public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
- if (annotationClass == null)
- throw new NullPointerException();
-
- return (T) declaredAnnotations().get(annotationClass);
- }
-
- /**
- * @since 1.5
- */
- public Annotation[] getDeclaredAnnotations() {
- return AnnotationParser.toArray(declaredAnnotations());
- }
-
- private transient Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
-
- private synchronized Map<Class<? extends Annotation>, Annotation> declaredAnnotations() {
- if (declaredAnnotations == null) {
- declaredAnnotations = AnnotationParser.parseAnnotations(
- annotations, sun.misc.SharedSecrets.getJavaLangAccess().
- getConstantPool(getDeclaringClass()),
- getDeclaringClass());
- }
- return declaredAnnotations;
- }
-
- /**
* Returns the default value for the annotation member represented by
* this {@code Method} instance. If the member is of a primitive type,
* an instance of the corresponding wrapper type is returned. Returns
* null if no default is associated with the member, or if the method
* instance does not represent a declared member of an annotation type.
@@ -732,36 +561,18 @@
throw new AnnotationFormatError("Invalid default: " + this);
return result;
}
/**
- * Returns an array of arrays that represent the annotations on the formal
- * parameters, in declaration order, of the method represented by
- * this {@code Method} object. (Returns an array of length zero if the
- * underlying method is parameterless. If the method has one or more
- * parameters, a nested array of length zero is returned for each parameter
- * with no annotations.) The annotation objects contained in the returned
- * arrays are serializable. The caller of this method is free to modify
- * the returned arrays; it will have no effect on the arrays returned to
- * other callers.
- *
- * @return an array of arrays that represent the annotations on the formal
- * parameters, in declaration order, of the method represented by this
- * Method object
+ * {@inheritDoc}
* @since 1.5
*/
+ @Override
public Annotation[][] getParameterAnnotations() {
- int numParameters = parameterTypes.length;
- if (parameterAnnotations == null)
- return new Annotation[numParameters][0];
+ return sharedGetParameterAnnotations(parameterTypes, parameterAnnotations);
+ }
- Annotation[][] result = AnnotationParser.parseParameterAnnotations(
- parameterAnnotations,
- sun.misc.SharedSecrets.getJavaLangAccess().
- getConstantPool(getDeclaringClass()),
- getDeclaringClass());
- if (result.length != numParameters)
- throw new java.lang.annotation.AnnotationFormatError(
- "Parameter annotations don't match number of parameters");
- return result;
+ @Override
+ void handleParameterNumberMismatch(int resultLength, int numParameters) {
+ throw new AnnotationFormatError("Parameter annotations don't match number of parameters");
}
}