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Diffstat (limited to 'variablespeed/tests/src/com/android/ex/variablespeed/DynamicProxy.java')
-rw-r--r-- | variablespeed/tests/src/com/android/ex/variablespeed/DynamicProxy.java | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/variablespeed/tests/src/com/android/ex/variablespeed/DynamicProxy.java b/variablespeed/tests/src/com/android/ex/variablespeed/DynamicProxy.java deleted file mode 100644 index 429f2cc..0000000 --- a/variablespeed/tests/src/com/android/ex/variablespeed/DynamicProxy.java +++ /dev/null @@ -1,62 +0,0 @@ -/* - * Copyright (C) 2011 The Android Open Source Project - * - * 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.android.ex.variablespeed; - -import java.lang.reflect.InvocationHandler; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.lang.reflect.Proxy; - -/** - * Contains a utility method for adapting a given interface against a real implementation. - * <p> - * This class is thead-safe. - */ -public class DynamicProxy { - /** - * Dynamically adapts a given interface against a delegate object. - * <p> - * For the given {@code clazz} object, which should be an interface, we return a new dynamic - * proxy object implementing that interface, which will forward all method calls made on the - * interface onto the delegate object. - * <p> - * In practice this means that you can make it appear as though {@code delegate} implements the - * {@code clazz} interface, without this in practice being the case. As an example, if you - * create an interface representing the {@link android.media.MediaPlayer}, you could pass this - * interface in as the first argument, and a real {@link android.media.MediaPlayer} in as the - * second argument, and now calls to the interface will be automatically sent on to the real - * media player. The reason you may be interested in doing this in the first place is that this - * allows you to test classes that have dependencies that are final or cannot be easily mocked. - */ - // This is safe, because we know that proxy instance implements the interface. - @SuppressWarnings("unchecked") - public static <T> T dynamicProxy(Class<T> clazz, final Object delegate) { - InvocationHandler invoke = new InvocationHandler() { - @Override - public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { - try { - return delegate.getClass() - .getMethod(method.getName(), method.getParameterTypes()) - .invoke(delegate, args); - } catch (InvocationTargetException e) { - throw e.getCause(); - } - } - }; - return (T) Proxy.newProxyInstance(clazz.getClassLoader(), new Class<?>[] { clazz }, invoke); - } -} |