Java tutorial
/* * Copyright 2007-2010 the original author or 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 org.impalaframework.spring; import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class DebuggingInterceptor implements MethodInterceptor { private static final Log logger = LogFactory.getLog(DebuggingInterceptor.class); public Object invoke(MethodInvocation invocation) throws Throwable { logger.debug("Calling method " + invocation); Class<?> returnType = invocation.getMethod().getReturnType(); if (Void.TYPE.equals(returnType)) return null; if (Byte.TYPE.equals(returnType)) return (byte) 0; if (Short.TYPE.equals(returnType)) return (short) 0; if (Integer.TYPE.equals(returnType)) return (int) 0; if (Long.TYPE.equals(returnType)) return 0L; if (Float.TYPE.equals(returnType)) return 0f; if (Double.TYPE.equals(returnType)) return 0d; if (Boolean.TYPE.equals(returnType)) return false; return null; } }