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