    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}