| /* |
| * Copyright (c) 1996, 2006, 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 |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.lang.reflect; |
| |
| import sun.reflect.CallerSensitive; |
| import sun.reflect.MethodAccessor; |
| import sun.reflect.Reflection; |
| import sun.reflect.generics.repository.MethodRepository; |
| import sun.reflect.generics.factory.CoreReflectionFactory; |
| import sun.reflect.generics.factory.GenericsFactory; |
| import sun.reflect.generics.scope.MethodScope; |
| 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). |
| * |
| * <p>A {@code Method} permits widening conversions to occur when matching the |
| * actual parameters to invoke with the underlying method's formal |
| * parameters, but it throws an {@code IllegalArgumentException} if a |
| * narrowing conversion would occur. |
| * |
| * @see Member |
| * @see java.lang.Class |
| * @see java.lang.Class#getMethods() |
| * @see java.lang.Class#getMethod(String, Class[]) |
| * @see java.lang.Class#getDeclaredMethods() |
| * @see java.lang.Class#getDeclaredMethod(String, Class[]) |
| * |
| * @author Kenneth Russell |
| * @author Nakul Saraiya |
| */ |
| public final |
| class Method extends AccessibleObject implements GenericDeclaration, |
| Member { |
| private Class<?> clazz; |
| private int slot; |
| // This is guaranteed to be interned by the VM in the 1.4 |
| // reflection implementation |
| private String name; |
| private Class<?> returnType; |
| private Class<?>[] parameterTypes; |
| private Class<?>[] exceptionTypes; |
| private int modifiers; |
| // Generics and annotations support |
| private transient String signature; |
| // generic info repository; lazily initialized |
| private transient MethodRepository genericInfo; |
| private byte[] annotations; |
| private byte[] parameterAnnotations; |
| private byte[] annotationDefault; |
| private volatile MethodAccessor methodAccessor; |
| // 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 |
| |
| 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() { |
| // lazily initialize repository if necessary |
| if (genericInfo == null) { |
| // create and cache generic info repository |
| genericInfo = MethodRepository.make(getGenericSignature(), |
| getFactory()); |
| } |
| return genericInfo; //return cached repository |
| } |
| |
| /** |
| * Package-private constructor used by ReflectAccess to enable |
| * instantiation of these objects in Java code from the java.lang |
| * package via sun.reflect.LangReflectAccess. |
| */ |
| Method(Class<?> declaringClass, |
| String name, |
| Class<?>[] parameterTypes, |
| Class<?> returnType, |
| Class<?>[] checkedExceptions, |
| int modifiers, |
| int slot, |
| String signature, |
| byte[] annotations, |
| byte[] parameterAnnotations, |
| byte[] annotationDefault) |
| { |
| this.clazz = declaringClass; |
| this.name = name; |
| this.parameterTypes = parameterTypes; |
| this.returnType = returnType; |
| this.exceptionTypes = checkedExceptions; |
| this.modifiers = modifiers; |
| this.slot = slot; |
| this.signature = signature; |
| this.annotations = annotations; |
| this.parameterAnnotations = parameterAnnotations; |
| this.annotationDefault = annotationDefault; |
| } |
| |
| /** |
| * Package-private routine (exposed to java.lang.Class via |
| * ReflectAccess) which returns a copy of this Method. The copy's |
| * "root" field points to this Method. |
| */ |
| Method copy() { |
| // This routine enables sharing of MethodAccessor objects |
| // among Method objects which refer to the same underlying |
| // method in the VM. (All of this contortion is only necessary |
| // because of the "accessibility" bit in AccessibleObject, |
| // which implicitly requires that new java.lang.reflect |
| // objects be fabricated for each reflective call on Class |
| // objects.) |
| Method res = new Method(clazz, name, parameterTypes, returnType, |
| exceptionTypes, modifiers, slot, signature, |
| annotations, parameterAnnotations, annotationDefault); |
| res.root = this; |
| // Might as well eagerly propagate this if already present |
| res.methodAccessor = methodAccessor; |
| return res; |
| } |
| |
| /** |
| * Returns the {@code Class} object representing the class or interface |
| * that declares the method represented by this {@code Method} object. |
| */ |
| public Class<?> getDeclaringClass() { |
| return clazz; |
| } |
| |
| /** |
| * Returns the name of the method represented by this {@code Method} |
| * object, as a {@code String}. |
| */ |
| 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 |
| */ |
| 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> |
| * @since 1.5 |
| */ |
| public TypeVariable<Method>[] getTypeParameters() { |
| if (getGenericSignature() != null) |
| return (TypeVariable<Method>[])getGenericInfo().getTypeParameters(); |
| else |
| return (TypeVariable<Method>[])new TypeVariable[0]; |
| } |
| |
| /** |
| * Returns a {@code Class} object that represents the formal return type |
| * of the method represented by this {@code Method} object. |
| * |
| * @return the return type for the method this object represents |
| */ |
| public Class<?> getReturnType() { |
| return returnType; |
| } |
| |
| /** |
| * Returns a {@code Type} object that represents the formal return |
| * type of the method represented by this {@code Method} object. |
| * |
| * <p>If the return type is a parameterized type, |
| * the {@code Type} object returned must accurately reflect |
| * the actual type parameters used in the source code. |
| * |
| * <p>If the return type is a type variable or a parameterized type, it |
| * is created. Otherwise, it is resolved. |
| * |
| * @return a {@code Type} object that represents the formal return |
| * type of 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 |
| * return type refers to a non-existent type declaration |
| * @throws MalformedParameterizedTypeException if the |
| * underlying method's return typed refers to a parameterized |
| * type that cannot be instantiated for any reason |
| * @since 1.5 |
| */ |
| public Type getGenericReturnType() { |
| 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 |
| */ |
| 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 |
| * @since 1.5 |
| */ |
| public Type[] getGenericParameterTypes() { |
| if (getGenericSignature() != null) |
| return getGenericInfo().getParameterTypes(); |
| else |
| return getParameterTypes(); |
| } |
| |
| |
| /** |
| * 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 |
| */ |
| 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 |
| * @since 1.5 |
| */ |
| public Type[] getGenericExceptionTypes() { |
| Type[] result; |
| if (getGenericSignature() != null && |
| ((result = getGenericInfo().getExceptionTypes()).length > 0)) |
| return result; |
| else |
| return getExceptionTypes(); |
| } |
| |
| /** |
| * Compares this {@code Method} against the specified object. Returns |
| * true if the objects are the same. Two {@code Methods} are the same if |
| * they were declared by the same class and have the same name |
| * and formal parameter types and return type. |
| */ |
| public boolean equals(Object obj) { |
| if (obj != null && obj instanceof Method) { |
| 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 false; |
| } |
| |
| /** |
| * Returns a hashcode for this {@code Method}. The hashcode is computed |
| * as the exclusive-or of the hashcodes for the underlying |
| * method's declaring class name and the method's name. |
| */ |
| public int hashCode() { |
| return getDeclaringClass().getName().hashCode() ^ getName().hashCode(); |
| } |
| |
| /** |
| * Returns a string describing this {@code Method}. The string is |
| * formatted as the method access modifiers, if any, followed by |
| * the method return type, followed by a space, followed by the |
| * class declaring the method, followed by a period, followed by |
| * the method name, followed by a parenthesized, comma-separated |
| * list of the method's formal parameter types. If the method |
| * throws checked exceptions, the parameter list is followed by a |
| * space, followed by the word throws followed by a |
| * comma-separated list of the thrown exception types. |
| * For example: |
| * <pre> |
| * public boolean java.lang.Object.equals(java.lang.Object) |
| * </pre> |
| * |
| * <p>The access modifiers are placed in canonical order as |
| * specified by "The Java Language Specification". This is |
| * {@code public}, {@code protected} or {@code private} first, |
| * 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(' '); |
| } |
| 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 + ">"; |
| } |
| } |
| |
| /** |
| * Returns a string describing this {@code Method}, including |
| * type parameters. The string is formatted as the method access |
| * modifiers, if any, followed by an angle-bracketed |
| * comma-separated list of the method's type parameters, if any, |
| * followed by the method's generic return type, followed by a |
| * space, followed by the class declaring the method, followed by |
| * a period, followed by the method name, followed by a |
| * parenthesized, comma-separated list of the method's generic |
| * formal parameter types. |
| * |
| * If this method was declared to take a variable number of |
| * arguments, instead of denoting the last parameter as |
| * "<tt><i>Type</i>[]</tt>", it is denoted as |
| * "<tt><i>Type</i>...</tt>". |
| * |
| * A space is used to separate access modifiers from one another |
| * and from the type parameters or return type. If there are no |
| * type parameters, the type parameter list is elided; if the type |
| * parameter list is present, a space separates the list from the |
| * class name. If the method is declared to throw exceptions, the |
| * parameter list is followed by a space, followed by the word |
| * throws followed by a comma-separated list of the generic thrown |
| * exception types. If there are no type parameters, the type |
| * parameter list is elided. |
| * |
| * <p>The access modifiers are placed in canonical order as |
| * specified by "The Java Language Specification". This is |
| * {@code public}, {@code protected} or {@code private} first, |
| * and then other modifiers in the following order: |
| * {@code abstract}, {@code static}, {@code final}, |
| * {@code synchronized}, {@code native}, {@code strictfp}. |
| * |
| * @return a string describing this {@code Method}, |
| * include type parameters |
| * |
| * @since 1.5 |
| */ |
| 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("> "); |
| } |
| |
| 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 + ">"; |
| } |
| } |
| |
| /** |
| * Invokes the underlying method represented by this {@code Method} |
| * object, on the specified object with the specified parameters. |
| * Individual parameters are automatically unwrapped to match |
| * primitive formal parameters, and both primitive and reference |
| * parameters are subject to method invocation conversions as |
| * necessary. |
| * |
| * <p>If the underlying method is static, then the specified {@code obj} |
| * argument is ignored. It may be null. |
| * |
| * <p>If the number of formal parameters required by the underlying method is |
| * 0, the supplied {@code args} array may be of length 0 or null. |
| * |
| * <p>If the underlying method is an instance method, it is invoked |
| * using dynamic method lookup as documented in The Java Language |
| * Specification, Second Edition, section 15.12.4.4; in particular, |
| * overriding based on the runtime type of the target object will occur. |
| * |
| * <p>If the underlying method is static, the class that declared |
| * the method is initialized if it has not already been initialized. |
| * |
| * <p>If the method completes normally, the value it returns is |
| * returned to the caller of invoke; if the value has a primitive |
| * type, it is first appropriately wrapped in an object. However, |
| * if the value has the type of an array of a primitive type, the |
| * elements of the array are <i>not</i> wrapped in objects; in |
| * other words, an array of primitive type is returned. If the |
| * underlying method return type is void, the invocation returns |
| * null. |
| * |
| * @param obj the object the underlying method is invoked from |
| * @param args the arguments used for the method call |
| * @return the result of dispatching the method represented by |
| * this object on {@code obj} with parameters |
| * {@code args} |
| * |
| * @exception IllegalAccessException if this {@code Method} object |
| * is enforcing Java language access control and the underlying |
| * method is inaccessible. |
| * @exception IllegalArgumentException if the method is an |
| * instance method and the specified object argument |
| * is not an instance of the class or interface |
| * declaring the underlying method (or of a subclass |
| * or implementor thereof); if the number of actual |
| * and formal parameters differ; if an unwrapping |
| * conversion for primitive arguments fails; or if, |
| * after possible unwrapping, a parameter value |
| * cannot be converted to the corresponding formal |
| * parameter type by a method invocation conversion. |
| * @exception InvocationTargetException if the underlying method |
| * throws an exception. |
| * @exception NullPointerException if the specified object is null |
| * and the method is an instance method. |
| * @exception ExceptionInInitializerError if the initialization |
| * provoked by this method fails. |
| */ |
| @CallerSensitive |
| public Object invoke(Object obj, Object... args) |
| throws IllegalAccessException, IllegalArgumentException, |
| InvocationTargetException |
| { |
| if (!override) { |
| if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) { |
| // Until there is hotspot @CallerSensitive support |
| // can't call Reflection.getCallerClass() here |
| // Workaround for now: add a frame getCallerClass to |
| // make the caller at stack depth 2 |
| Class<?> caller = getCallerClass(); |
| checkAccess(caller, clazz, obj, modifiers); |
| } |
| } |
| MethodAccessor ma = methodAccessor; // read volatile |
| if (ma == null) { |
| ma = acquireMethodAccessor(); |
| } |
| return ma.invoke(obj, args); |
| } |
| |
| /* |
| * This method makes the frame count to be 2 to find the caller |
| */ |
| @CallerSensitive |
| private Class<?> getCallerClass() { |
| // Reflection.getCallerClass() currently returns the frame at depth 2 |
| // before the hotspot support is in. |
| return Reflection.getCallerClass(); |
| } |
| |
| /** |
| * Returns {@code true} if this method is a bridge |
| * method; returns {@code false} otherwise. |
| * |
| * @return true if and only if this method is a bridge |
| * method as defined by the Java Language Specification. |
| * @since 1.5 |
| */ |
| 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. |
| * @since 1.5 |
| */ |
| public boolean isVarArgs() { |
| return (getModifiers() & Modifier.VARARGS) != 0; |
| } |
| |
| /** |
| * 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. |
| * @since 1.5 |
| */ |
| public boolean isSynthetic() { |
| return Modifier.isSynthetic(getModifiers()); |
| } |
| |
| // 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 |
| // probably make the implementation more scalable. |
| private MethodAccessor acquireMethodAccessor() { |
| // First check to see if one has been created yet, and take it |
| // if so |
| MethodAccessor tmp = null; |
| if (root != null) tmp = root.getMethodAccessor(); |
| if (tmp != null) { |
| methodAccessor = tmp; |
| } else { |
| // Otherwise fabricate one and propagate it up to the root |
| tmp = reflectionFactory.newMethodAccessor(this); |
| setMethodAccessor(tmp); |
| } |
| |
| return tmp; |
| } |
| |
| // Returns MethodAccessor for this Method object, not looking up |
| // the chain to the root |
| MethodAccessor getMethodAccessor() { |
| return methodAccessor; |
| } |
| |
| // Sets the MethodAccessor for this Method object and |
| // (recursively) its root |
| void setMethodAccessor(MethodAccessor accessor) { |
| methodAccessor = accessor; |
| // Propagate up |
| if (root != null) { |
| 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. |
| * |
| * @return the default value for the annotation member represented |
| * by this {@code Method} instance. |
| * @throws TypeNotPresentException if the annotation is of type |
| * {@link Class} and no definition can be found for the |
| * default class value. |
| * @since 1.5 |
| */ |
| public Object getDefaultValue() { |
| if (annotationDefault == null) |
| return null; |
| Class<?> memberType = AnnotationType.invocationHandlerReturnType( |
| getReturnType()); |
| Object result = AnnotationParser.parseMemberValue( |
| memberType, ByteBuffer.wrap(annotationDefault), |
| sun.misc.SharedSecrets.getJavaLangAccess(). |
| getConstantPool(getDeclaringClass()), |
| getDeclaringClass()); |
| if (result instanceof sun.reflect.annotation.ExceptionProxy) |
| 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 |
| * @since 1.5 |
| */ |
| public Annotation[][] getParameterAnnotations() { |
| int numParameters = parameterTypes.length; |
| if (parameterAnnotations == null) |
| return new Annotation[numParameters][0]; |
| |
| 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; |
| } |
| } |
