001/* 
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 *  contributor license agreements.  See the NOTICE file distributed with
004 *  this work for additional information regarding copyright ownership.
005 *  The ASF licenses this file to You under the Apache License, Version 2.0
006 *  (the "License"); you may not use this file except in compliance with
007 *  the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 *
017 */
018
019package org.apache.commons.exec.launcher;
020
021import java.io.IOException;
022import java.util.Map;
023
024import org.apache.commons.exec.CommandLine;
025
026/**
027 * A command launcher that proxies another command launcher. Sub-classes
028 * override exec(args, env, workdir)
029 *
030 * @version $Id: CommandLauncherProxy.java 1557338 2014-01-11 10:34:22Z sebb $
031 */
032public abstract class CommandLauncherProxy extends CommandLauncherImpl {
033
034    public CommandLauncherProxy(final CommandLauncher launcher) {
035        myLauncher = launcher;
036    }
037
038    private final CommandLauncher myLauncher;
039
040    /**
041     * Launches the given command in a new process. Delegates this method to the
042     * proxied launcher
043     * 
044     * @param cmd
045     *            the command line to execute as an array of strings
046     * @param env
047     *            the environment to set as an array of strings
048     * @throws IOException
049     *             forwarded from the exec method of the command launcher
050     */
051    @Override
052    public Process exec(final CommandLine cmd, final Map<String, String> env)
053            throws IOException {
054        return myLauncher.exec(cmd, env);
055    }
056}