WinNTCommandLauncher.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.commons.exec.launcher;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import org.apache.commons.exec.CommandLine;

/**
 * A command launcher for Windows XP/2000/NT that uses 'cmd.exe' when launching commands in directories other than the current working directory.
 */
public class WinNTCommandLauncher extends CommandLauncherProxy {

    /**
     * Constructs a new instance.
     *
     * @param launcher the command launcher to use.
     */
    public WinNTCommandLauncher(final CommandLauncher launcher) {
        super(launcher);
    }

    /**
     * Launches the given command in a new process, in the given working directory.
     *
     * @param cmd        the command line to execute as an array of strings.
     * @param env        the environment to set as an array of strings.
     * @param workingDir working directory where the command should run.
     * @throws IOException forwarded from the exec method of the command launcher.
     */
    @Override
    public Process exec(final CommandLine cmd, final Map<String, String> env, final File workingDir) throws IOException {
        if (workingDir == null) {
            return exec(cmd, env);
        }

        // Use cmd.exe to change to the specified directory before running the command.
        // @formatter:off
        return exec(new CommandLine("cmd")
                .addArgument("/c")
                .addArguments(cmd.toStrings()), env);
        // @formatter:on
    }
}