    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
    018package org.apache.commons.exec.launcher;
    019
    020import java.io.IOException;
    021import java.util.Map;
    022
    023import org.apache.commons.exec.CommandLine;
    024
    025/**
    026 * A command launcher that proxies another command launcher. Sub-classes override exec(args, env, workdir)
    027 */
    028public abstract class CommandLauncherProxy extends CommandLauncherImpl {
    029
    030    /** The command launcher to use. */
    031    private final CommandLauncher launcher;
    032
    033    /**
    034     * Constructs a new instance.
    035     *
    036     * @param launcher the command launcher to use.
    037     */
    038    public CommandLauncherProxy(final CommandLauncher launcher) {
    039        this.launcher = launcher;
    040    }
    041
    042    /**
    043     * Launches the given command in a new process. Delegates this method to the proxied launcher.
    044     *
    045     * @param cmd the command line to execute as an array of strings.
    046     * @param env the environment to set as an array of strings.
    047     * @throws IOException forwarded from the exec method of the command launcher.
    048     */
    049    @Override
    050    public Process exec(final CommandLine cmd, final Map<String, String> env) throws IOException {
    051        return launcher.exec(cmd, env);
    052    }
    053}