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1 package org.objectweb.celtix.configuration.impl;
2
3 import java.util.logging.Logger  ;
4
5 import javax.xml.namespace.QName ;
6
7 import org.w3c.dom.Document ;
8 import org.w3c.dom.Element ;
9 import org.w3c.dom.Node ;
10
11 import org.objectweb.celtix.common.i18n.Message;
12 import org.objectweb.celtix.common.logging.LogUtils;
13 import org.objectweb.celtix.configuration.ConfigurationException;
14
15 public final class ConfigurationMetadataUtils {
16
17 private static final Logger LOG = LogUtils.getL7dLogger(ConfigurationMetadataUtils.class);
18
19
23 private ConfigurationMetadataUtils() {
24 }
25
26 public static String getElementValue(Node node) {
27 for (Node nd = node.getFirstChild(); nd != null; nd = nd.getNextSibling()) {
28 if (Node.TEXT_NODE == nd.getNodeType()) {
29 return nd.getNodeValue();
30 }
31 }
32 return null;
33 }
34
35 public static QName elementAttributeToQName(Document document, Element element, String attrName) {
36 return stringToQName(document, element, element.getAttribute(attrName));
37 }
38
39 public static QName elementValueToQName(Document document, Element element) {
40 return stringToQName(document, element, getElementValue(element));
41 }
42
43 private static QName stringToQName(Document document, Element element, String s) {
44
45 int index = s.indexOf(":");
46 if (index < 0) {
47 return new QName (s);
48 } else if (index == 0) {
49 throw new ConfigurationException(new Message("ILLEGAL_QNAME_EXC", LOG, s));
50 }
51 String prefix = s.substring(0, index);
52 String nsAttr = "xmlns:" + prefix;
53 String uri = null;
54 Element el = element;
55 while (null == uri || "".equals(uri)) {
56 uri = el.getAttribute(nsAttr);
57 if (null != uri && !"".equals(uri)) {
58 break;
59 }
60 if (el == document.getDocumentElement()) {
61 break;
62 }
63 el = (Element )el.getParentNode();
64 }
65 if (null == uri || "".equals(uri)) {
66 throw new ConfigurationException(new Message("ILLEGAL_PREFIX_EXC", LOG, s));
67 }
68 if (index >= (s.length() - 1)) {
69 throw new ConfigurationException(new Message("ILLEGAL_QNAME_EXC", LOG, s));
70 }
71
72 String localPart = s.substring(index + 1);
73 return new QName (uri, localPart);
74 }
75 }
76 |
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