1 /*
2 * Copyright 2012 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.ci.config.load;
17
18 import org.jdom.Document;
19 import org.jdom.JDOMException;
20
21 import de.smartics.ci.config.utils.JDomUtils;
22
23 /**
24 * Merges two Hudson config files.
25 */
26 class DocumentMerger
27 {
28 // ********************************* Fields *********************************
29
30 // --- constants ------------------------------------------------------------
31
32 // --- members --------------------------------------------------------------
33
34 // ****************************** Initializer *******************************
35
36 // ****************************** Constructors ******************************
37
38 // ****************************** Inner Classes *****************************
39
40 // ********************************* Methods ********************************
41
42 // --- init -----------------------------------------------------------------
43
44 // --- get&set --------------------------------------------------------------
45
46 // --- business -------------------------------------------------------------
47
48 /**
49 * Merges {@code newDocument} into the give {@code document}.
50 *
51 * @param document the document to have information added and is returned. May
52 * be <code>null</code> so that the {@code newDocument} is returned.
53 * @param newDocument the document to add information to {@code document}. May
54 * be <code>null</code> so that the {@code document} is returned.
55 * @return the merged document.
56 * @throws JDOMException on any XML problem encountered while merging the
57 * documents.
58 */
59 Document merge(final Document document, final Document newDocument)
60 throws JDOMException
61 {
62 if (document == null)
63 {
64 return newDocument;
65 }
66 if (newDocument == null)
67 {
68 return document;
69 }
70
71 JDomUtils.merge(document, newDocument);
72
73 return document;
74 }
75
76 // --- object basics --------------------------------------------------------
77
78 }