Java tutorial
/* * Copyright 2008 Pavel Syrtsov * * 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.sf.ddao.crud.ops; import com.sf.ddao.chain.CtxHelper; import com.sf.ddao.chain.MethodCallCtx; import com.sf.ddao.crud.DirtyableBean; import org.apache.commons.chain.Command; import org.apache.commons.chain.Context; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.lang.reflect.Method; /** * Created by psyrtsov */ public class CheckIfDirtyOperation implements Command { public static final Logger log = LoggerFactory.getLogger(CheckIfDirtyOperation.class.getName()); public boolean execute(Context context) throws Exception { final MethodCallCtx callCtx = CtxHelper.get(context, MethodCallCtx.class); final Object[] args = callCtx.getArgs(); final Method method = callCtx.getMethod(); for (Object arg : args) { if (arg instanceof DirtyableBean) { DirtyableBean dirtyableBean = (DirtyableBean) arg; if (!dirtyableBean.beanIsDirty()) { if (method.getReturnType() == Integer.TYPE || method.getReturnType() == Integer.class) { callCtx.setLastReturn(0); } log.debug("Bean '{}' is not dirty and doesn't have to be updated" + arg); return PROCESSING_COMPLETE; } } } return CONTINUE_PROCESSING; } }