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 package org.apache.commons.exec.launcher;
19
20 import java.io.IOException;
21 import java.util.Map;
22
23 import org.apache.commons.exec.CommandLine;
24
25 /**
26 * A command launcher that proxies another command launcher. Sub-classes override exec(args, env, workdir)
27 */
28 public abstract class CommandLauncherProxy extends CommandLauncherImpl {
29
30 /** The command launcher to use. */
31 private final CommandLauncher launcher;
32
33 /**
34 * Constructs a new instance.
35 *
36 * @param launcher the command launcher to use.
37 */
38 public CommandLauncherProxy(final CommandLauncher launcher) {
39 this.launcher = launcher;
40 }
41
42 /**
43 * Launches the given command in a new process. Delegates this method to the proxied launcher.
44 *
45 * @param cmd the command line to execute as an array of strings.
46 * @param env the environment to set as an array of strings.
47 * @throws IOException forwarded from the exec method of the command launcher.
48 */
49 @Override
50 public Process exec(final CommandLine cmd, final Map<String, String> env) throws IOException {
51 return launcher.exec(cmd, env);
52 }
53 }