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19 package org.apache.myfaces.shared.util.xml;
20
21 import org.w3c.dom.Element;
22 import org.w3c.dom.Node;
23 import org.w3c.dom.NodeList;
24
25 import java.util.ArrayList;
26 import java.util.Collections;
27 import java.util.List;
28
29 /***
30 * @author Manfred Geiler (latest modification by $Author: matzew $)
31 * @version $Revision: 557350 $ $Date: 2007-07-18 13:19:50 -0500 (Wed, 18 Jul 2007) $
32 */
33 public class XmlUtils
34 {
35 private XmlUtils()
36 {
37
38 }
39
40 public static String getElementText(Element elem)
41 {
42 StringBuffer buf = new StringBuffer();
43 NodeList nodeList = elem.getChildNodes();
44 for (int i = 0, len = nodeList.getLength(); i < len; i++)
45 {
46 Node n = nodeList.item(i);
47 if (n.getNodeType() == Node.TEXT_NODE)
48 {
49 buf.append(n.getNodeValue());
50 }
51 else
52 {
53
54
55 }
56 }
57 return buf.toString();
58 }
59
60
61
62 /***
63 * Return content of child element with given tag name.
64 * If more than one children with this name are present, the content of the last
65 * element is returned.
66 *
67 * @param elem
68 * @param childTagName
69 * @return content of child element or null if no child element with this name was found
70 */
71 public static String getChildText(Element elem, String childTagName)
72 {
73 NodeList nodeList = elem.getElementsByTagName(childTagName);
74 int len = nodeList.getLength();
75 if (len == 0)
76 {
77 return null;
78 }
79
80 return getElementText((Element)nodeList.item(len - 1));
81
82 }
83
84
85 /***
86 * Return list of content Strings of all child elements with given tag name.
87 * @param elem
88 * @param childTagName
89 * @return List
90 */
91 public static List getChildTextList(Element elem, String childTagName)
92 {
93 NodeList nodeList = elem.getElementsByTagName(childTagName);
94 int len = nodeList.getLength();
95 if (len == 0)
96 {
97 return Collections.EMPTY_LIST;
98 }
99
100 List list = new ArrayList(len);
101 for (int i = 0; i < len; i++)
102 {
103 list.add(getElementText((Element)nodeList.item(i)));
104 }
105 return list;
106
107 }
108
109 }