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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 /*
20  * Since the initial version of this file was deveolped on the clock on
21  * an NSF grant I should say the following boilerplate:
22  *
23  * This material is based upon work supported by the National Science
24  * Foundaton under Grant No. EIA-0196404. Any opinions, findings, and
25  * conclusions or recommendations expressed in this material are those
26  * of the author and do not necessarily reflect the views of the
27  * National Science Foundation.
28  */
29
30 package org.apache.tools.ant.taskdefs.optional.unix;
31
32 import org.apache.tools.ant.BuildException;
33
34 /**
35  * Chgrp equivalent for unix-like environments.
36  *
37  * @since Ant 1.6
38  *
39  * @ant.task category="filesystem"
40  */
41 public class Chgrp extends AbstractAccessTask {
42
43     private boolean haveGroup = false;
44
45     /**
46      * Chgrp task for setting unix group of a file.
47      */
48     public Chgrp() {
49         super.setExecutable("chgrp");
50     }
51
52     /**
53      * Set the group atribute.
54      *
55      * @param group The new group for the file(s) or directory(ies)
56      */
57     public void setGroup(String JavaDoc group) {
58         createArg().setValue(group);
59         haveGroup = true;
60     }
61
62     /**
63      * Ensure that all the required arguments and other conditions have
64      * been set.
65      */
66     protected void checkConfiguration() {
67         if (!haveGroup) {
68             throw new BuildException("Required attribute group not set in "
69                                      + "chgrp", getLocation());
70         }
71         super.checkConfiguration();
72     }
73
74     /**
75      * We don't want to expose the executable atribute, so overide it.
76      *
77      * @param e User supplied executable that we won't accept.
78      */
79     public void setExecutable(String JavaDoc e) {
80         throw new BuildException(getTaskType()
81                                  + " doesn\'t support the executable"
82                                  + " attribute", getLocation());
83     }
84 }
85
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