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Java > Open Source Codes > org > apache > hivemind > impl > ContributionImpl


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.impl;
16
17 import java.util.ArrayList JavaDoc;
18 import java.util.Collections JavaDoc;
19 import java.util.List JavaDoc;
20
21 import org.apache.hivemind.internal.Contribution;
22 import org.apache.hivemind.internal.Module;
23
24 /**
25  * Implements the {@link org.apache.hivemind.internal.Contribution} interface, a wrapper
26  * around objects that can provide values that plug into an extension point.
27  *
28  * @author Howard Lewis Ship
29  */
30 public final class ContributionImpl implements Contribution
31 {
32     private Module _contributingModule;
33
34     private List JavaDoc _elements;
35
36     public Module getContributingModule()
37     {
38         return _contributingModule;
39     }
40
41     public void setContributingModule(Module module)
42     {
43         _contributingModule = module;
44     }
45
46     public void addElements(List JavaDoc elements)
47     {
48         if (_elements == null)
49             _elements = new ArrayList JavaDoc(elements);
50         else
51             _elements.addAll(elements);
52     }
53
54     public List JavaDoc getElements()
55     {
56         if (_elements == null)
57             return Collections.EMPTY_LIST;
58
59         return _elements;
60     }
61 }
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