001/*
002 * Copyright 2006-2010 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.batch.integration.step;
018
019import org.springframework.batch.core.Step;
020import org.springframework.batch.core.StepExecution;
021import org.springframework.batch.core.step.AbstractStep;
022import org.springframework.util.Assert;
023
024/**
025 * Provides a wrapper for an existing {@link Step}, delegating execution to it,
026 * but serving all other operations locally.
027 * 
028 * @author Dave Syer
029 * 
030 */
031public class DelegateStep extends AbstractStep {
032
033        private Step delegate;
034
035        /**
036         * @param delegate the delegate to set
037         */
038        public void setDelegate(Step delegate) {
039                this.delegate = delegate;
040        }
041        
042        /**
043         * Check mandatory properties (delegate).
044         */
045        @Override
046        public void afterPropertiesSet() throws Exception {
047                Assert.state(delegate!=null, "A delegate Step must be provided");
048                super.afterPropertiesSet();
049        }
050
051        @Override
052        protected void doExecute(StepExecution stepExecution) throws Exception {
053                delegate.execute(stepExecution);
054        }
055
056}