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     */
018    
019    package org.apache.commons.exec.launcher;
020    
021    import java.io.File;
022    import java.io.IOException;
023    import java.util.Map;
024    
025    import org.apache.commons.exec.CommandLine;
026    import org.apache.commons.exec.environment.EnvironmentUtils;
027    
028    /**
029     * A command launcher for a particular JVM/OS platform. This class is a general
030     * purpose command launcher which can only launch commands in the current
031     * working directory.
032     */
033    public abstract class CommandLauncherImpl implements CommandLauncher {
034    
035        public Process exec(final CommandLine cmd, final Map env)
036                throws IOException {
037            String[] envVar = EnvironmentUtils.toStrings(env);
038            return Runtime.getRuntime().exec(cmd.toStrings(), envVar);
039        }
040    
041        public abstract Process exec(final CommandLine cmd, final Map env,
042                final File workingDir) throws IOException;
043    
044        /** @see org.apache.commons.exec.launcher.CommandLauncher#isFailure(int) */    
045        public boolean isFailure(final int exitValue)
046        {
047            // non zero exit value signals failure
048            return exitValue != 0;
049        }
050    }