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1   /* 
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    *  contributor license agreements.  See the NOTICE file distributed with
4    *  this work for additional information regarding copyright ownership.
5    *  The ASF licenses this file to You under the Apache License, Version 2.0
6    *  (the "License"); you may not use this file except in compliance with
7    *  the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   *  Unless required by applicable law or agreed to in writing, software
12   *  distributed under the License is distributed on an "AS IS" BASIS,
13   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   *  See the License for the specific language governing permissions and
15   *  limitations under the License.
16   *
17   */
18  
19  package org.apache.commons.exec.launcher;
20  
21  import java.io.IOException;
22  import java.util.Map;
23  
24  import org.apache.commons.exec.CommandLine;
25  
26  /**
27   * A command launcher that proxies another command launcher. Sub-classes
28   * override exec(args, env, workdir)
29   *
30   * @version $Id: CommandLauncherProxy.java 1557338 2014-01-11 10:34:22Z sebb $
31   */
32  public abstract class CommandLauncherProxy extends CommandLauncherImpl {
33  
34      public CommandLauncherProxy(final CommandLauncher launcher) {
35          myLauncher = launcher;
36      }
37  
38      private final CommandLauncher myLauncher;
39  
40      /**
41       * Launches the given command in a new process. Delegates this method to the
42       * proxied launcher
43       * 
44       * @param cmd
45       *            the command line to execute as an array of strings
46       * @param env
47       *            the environment to set as an array of strings
48       * @throws IOException
49       *             forwarded from the exec method of the command launcher
50       */
51      @Override
52      public Process exec(final CommandLine cmd, final Map<String, String> env)
53              throws IOException {
54          return myLauncher.exec(cmd, env);
55      }
56  }