CommandLauncherProxy.java

  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.  *      https://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. package org.apache.commons.exec.launcher;

  18. import java.io.IOException;
  19. import java.util.Map;

  20. import org.apache.commons.exec.CommandLine;

  21. /**
  22.  * A command launcher that proxies another command launcher. Sub-classes override exec(args, env, workdir)
  23.  */
  24. public abstract class CommandLauncherProxy extends CommandLauncherImpl {

  25.     /** The command launcher to use. */
  26.     private final CommandLauncher launcher;

  27.     /**
  28.      * Constructs a new instance.
  29.      *
  30.      * @param launcher the command launcher to use.
  31.      */
  32.     public CommandLauncherProxy(final CommandLauncher launcher) {
  33.         this.launcher = launcher;
  34.     }

  35.     /**
  36.      * Launches the given command in a new process. Delegates this method to the proxied launcher.
  37.      *
  38.      * @param cmd the command line to execute as an array of strings.
  39.      * @param env the environment to set as an array of strings.
  40.      * @throws IOException forwarded from the exec method of the command launcher.
  41.      */
  42.     @Override
  43.     public Process exec(final CommandLine cmd, final Map<String, String> env) throws IOException {
  44.         return launcher.exec(cmd, env);
  45.     }
  46. }