aboutsummaryrefslogtreecommitdiffstats
path: root/guava/src/com/google/common/reflect/AbstractInvocationHandler.java
diff options
context:
space:
mode:
Diffstat (limited to 'guava/src/com/google/common/reflect/AbstractInvocationHandler.java')
-rw-r--r--guava/src/com/google/common/reflect/AbstractInvocationHandler.java112
1 files changed, 0 insertions, 112 deletions
diff --git a/guava/src/com/google/common/reflect/AbstractInvocationHandler.java b/guava/src/com/google/common/reflect/AbstractInvocationHandler.java
deleted file mode 100644
index 489dcff..0000000
--- a/guava/src/com/google/common/reflect/AbstractInvocationHandler.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * Copyright (C) 2012 The Guava Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.common.reflect;
-
-import com.google.common.annotations.Beta;
-
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
-import java.lang.reflect.Proxy;
-
-import javax.annotation.Nullable;
-
-/**
- * Abstract implementation of {@link InvocationHandler} that handles {@link Object#equals},
- * {@link Object#hashCode} and {@link Object#toString}.
- *
- * @author Ben Yu
- * @since 12.0
- */
-@Beta
-public abstract class AbstractInvocationHandler implements InvocationHandler {
-
- private static final Object[] NO_ARGS = {};
-
- /**
- * {@inheritDoc}
- *
- * <p><ul>
- * <li>{@code proxy.hashCode()} delegates to {@link AbstractInvocationHandler#hashCode}
- * <li>{@code proxy.toString()} delegates to {@link AbstractInvocationHandler#toString}
- * <li>{@code proxy.equals(argument)} returns true if: <ul>
- * <li>{@code proxy} and {@code argument} are of the same type
- * <li>and {@link AbstractInvocationHandler#equals} returns true for the {@link
- * InvocationHandler} of {@code argument}
- * </ul>
- * <li>other method calls are dispatched to {@link #handleInvocation}.
- * </ul>
- */
- @Override public final Object invoke(Object proxy, Method method, @Nullable Object[] args)
- throws Throwable {
- if (args == null) {
- args = NO_ARGS;
- }
- if (args.length == 0 && method.getName().equals("hashCode")) {
- return hashCode();
- }
- if (args.length == 1
- && method.getName().equals("equals")
- && method.getParameterTypes()[0] == Object.class) {
- Object arg = args[0];
- return proxy.getClass().isInstance(arg) && equals(Proxy.getInvocationHandler(arg));
- }
- if (args.length == 0 && method.getName().equals("toString")) {
- return toString();
- }
- return handleInvocation(proxy, method, args);
- }
-
- /**
- * {@link #invoke} delegates to this method upon any method invocation on the proxy instance,
- * except {@link Object#equals}, {@link Object#hashCode} and {@link Object#toString}. The result
- * will be returned as the proxied method's return value.
- *
- * <p>Unlike {@link #invoke}, {@code args} will never be null. When the method has no parameter,
- * an empty array is passed in.
- */
- protected abstract Object handleInvocation(Object proxy, Method method, Object[] args)
- throws Throwable;
-
- /**
- * By default delegates to {@link Object#equals} so instances are only equal if they are
- * identical. {@code proxy.equals(argument)} returns true if: <ul>
- * <li>{@code proxy} and {@code argument} are of the same type
- * <li>and this method returns true for the {@link InvocationHandler} of {@code argument}
- * </ul>
- * Subclasses can override this method to provide custom equality.
- */
- @Override public boolean equals(Object obj) {
- return super.equals(obj);
- }
-
- /**
- * By default delegates to {@link Object#hashCode}. The dynamic proxies' {@code hashCode()} will
- * delegate to this method. Subclasses can override this method to provide custom equality.
- */
- @Override public int hashCode() {
- return super.hashCode();
- }
-
- /**
- * By default delegates to {@link Object#toString}. The dynamic proxies' {@code toString()} will
- * delegate to this method. Subclasses can override this method to provide custom string
- * representation for the proxies.
- */
- @Override public String toString() {
- return super.toString();
- }
-}