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.File;
021import java.io.IOException;
022import java.util.Map;
023
024import org.apache.commons.exec.CommandLine;
025
026/**
027 * A command launcher for Windows XP/2000/NT that uses 'cmd.exe' when launching commands in directories other than the current working directory.
028 */
029public class WinNTCommandLauncher extends CommandLauncherProxy {
030
031    /**
032     * Constructs a new instance.
033     *
034     * @param launcher the command launcher to use.
035     */
036    public WinNTCommandLauncher(final CommandLauncher launcher) {
037        super(launcher);
038    }
039
040    /**
041     * Launches the given command in a new process, in the given working directory.
042     *
043     * @param cmd        the command line to execute as an array of strings.
044     * @param env        the environment to set as an array of strings.
045     * @param workingDir working directory where the command should run.
046     * @throws IOException forwarded from the exec method of the command launcher.
047     */
048    @Override
049    public Process exec(final CommandLine cmd, final Map<String, String> env, final File workingDir) throws IOException {
050        if (workingDir == null) {
051            return exec(cmd, env);
052        }
053
054        // Use cmd.exe to change to the specified directory before running the command.
055        // @formatter:off
056        return exec(new CommandLine("cmd")
057                .addArgument("/c")
058                .addArguments(cmd.toStrings()), env);
059        // @formatter:on
060    }
061}