Java tutorial
/** * Copyright 2010-2011 Nicholas Blair, Eric Dalquist * * 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.googlecode.ehcache.annotations.key; import java.lang.reflect.Method; import org.springframework.util.ReflectionUtils; import org.springframework.util.ReflectionUtils.MethodCallback; /** * Basic implementation of {@link ReflectionHelper} that determines which methods an object implements. The * reflection results are not cached so this implementation is fairly slow. * * @author Eric Dalquist * @version $Revision$ */ public class SimpleReflectionHelper implements ReflectionHelper { private static final class MutableBoolean { public boolean value = false; } /* (non-Javadoc) * @see com.googlecode.ehcache.annotations.key.ReflectionHelper#implementsEquals(java.lang.Object) */ public boolean implementsEquals(Object element) { final MutableBoolean found = new MutableBoolean(); ReflectionUtils.doWithMethods(element.getClass(), new MethodCallback() { public void doWith(Method method) throws IllegalArgumentException, IllegalAccessException { if (found.value || method.getDeclaringClass() == Object.class) { return; } if (ReflectionUtils.isEqualsMethod(method)) { found.value = true; } } }); return found.value; } /* (non-Javadoc) * @see com.googlecode.ehcache.annotations.key.ReflectionHelper#implementsHashCode(java.lang.Object) */ public boolean implementsHashCode(Object element) { final MutableBoolean found = new MutableBoolean(); ReflectionUtils.doWithMethods(element.getClass(), new MethodCallback() { public void doWith(Method method) throws IllegalArgumentException, IllegalAccessException { if (found.value || method.getDeclaringClass() == Object.class) { return; } if (ReflectionUtils.isHashCodeMethod(method)) { found.value = true; } } }); return found.value; } /* (non-Javadoc) * @see com.googlecode.ehcache.annotations.key.ReflectionHelper#implementsToString(java.lang.Object) */ public boolean implementsToString(Object element) { final MutableBoolean found = new MutableBoolean(); ReflectionUtils.doWithMethods(element.getClass(), new MethodCallback() { public void doWith(Method method) throws IllegalArgumentException, IllegalAccessException { if (found.value || method.getDeclaringClass() == Object.class) { return; } if (ReflectionUtils.isToStringMethod(method)) { found.value = true; } } }); return found.value; } }