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