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17 package org.apache.servicemix.jbi.util;
18
19 import org.apache.commons.logging.Log;
20 import org.apache.commons.logging.LogFactory;
21 import org.w3c.dom.Attr  ;
22 import org.w3c.dom.Document ;
23 import org.w3c.dom.Element ;
24 import org.w3c.dom.NamedNodeMap ;
25 import org.w3c.dom.Node ;
26 import org.w3c.dom.NodeList ;
27
28 import javax.xml.namespace.QName ;
29 import javax.xml.transform.OutputKeys ;
30 import javax.xml.transform.Transformer ;
31 import javax.xml.transform.TransformerException ;
32 import javax.xml.transform.TransformerFactory ;
33 import javax.xml.transform.dom.DOMSource ;
34 import javax.xml.transform.stream.StreamResult ;
35
36 import java.io.StringWriter ;
37
38
43 public class DOMUtil {
44 private static final Log log = LogFactory.getLog(DOMUtil.class);
45
46
49 public static String getElementText(Element element) {
50 StringBuffer buffer = new StringBuffer ();
51 NodeList nodeList = element.getChildNodes();
52 for (int i = 0, size = nodeList.getLength(); i < size; i++) {
53 Node node = nodeList.item(i);
54 if (node.getNodeType() == Node.TEXT_NODE || node.getNodeType() == Node.CDATA_SECTION_NODE) {
55 buffer.append(node.getNodeValue());
56 }
57 }
58 return buffer.toString();
59 }
60
61
64 public static void moveContent(Element from, Element to) {
65 NodeList childNodes = from.getChildNodes();
67 while (childNodes.getLength() > 0) {
68 Node node = childNodes.item(0);
69 from.removeChild(node);
70 to.appendChild(node);
71 }
72 }
73
74
77 public static void copyAttributes(Element from, Element to) {
78 NamedNodeMap attributes = from.getAttributes();
80 for (int i = 0, size = attributes.getLength(); i < size; i++) {
81 Attr node = (Attr ) attributes.item(i);
82 to.setAttributeNS(node.getNamespaceURI(), node.getName(), node.getValue());
83 }
84 }
85
86
89 public static String asXML(Node node) throws TransformerException {
90 Transformer transformer = TransformerFactory.newInstance().newTransformer();
91 StringWriter buffer = new StringWriter ();
92 transformer.transform(new DOMSource (node), new StreamResult (buffer));
93 return buffer.toString();
94 }
95
96
99 public static String asIndentedXML(Node node) throws TransformerException {
100 Transformer transformer = TransformerFactory.newInstance().newTransformer();
101 transformer.setOutputProperty(OutputKeys.INDENT, "yes");
102 StringWriter buffer = new StringWriter ();
103 transformer.transform(new DOMSource (node), new StreamResult (buffer));
104 return buffer.toString();
105 }
106
107
110 public static void addChildElement(Element element, String name, Object textValue) {
111 Document document = element.getOwnerDocument();
112 Element child = document.createElement(name);
113 element.appendChild(child);
114 if (textValue != null) {
115 String text = textValue.toString();
116 child.appendChild(document.createTextNode(text));
117 }
118 }
119
120
127 public static QName createQName(Element element, String qualifiedName) {
128 int index = qualifiedName.indexOf(':');
129 if (index >= 0) {
130 String prefix = qualifiedName.substring(0, index);
131 String localName = qualifiedName.substring(index + 1);
132 String uri = recursiveGetAttributeValue(element, "xmlns:" + prefix);
133 return new QName (uri, localName, prefix);
134 }
135 else {
136 String uri = recursiveGetAttributeValue(element, "xmlns");
137 if (uri != null) {
138 return new QName (uri, qualifiedName);
139 }
140 return new QName (qualifiedName);
141 }
142 }
143
144
147 public static String recursiveGetAttributeValue(Element element, String attributeName) {
148 String answer = null;
149 try {
150 answer = element.getAttribute(attributeName);
151 }
152 catch (Exception e) {
153 if (log.isTraceEnabled()) {
154 log.trace("Caught exception looking up attribute: " + attributeName + " on element: " + element + ". Cause: " + e, e);
155 }
156 }
157 if (answer == null || answer.length() == 0) {
158 Node parentNode = element.getParentNode();
159 if (parentNode instanceof Element ) {
160 return recursiveGetAttributeValue((Element ) parentNode, attributeName);
161 }
162 }
163 return answer;
164 }
165
166
171 public static Element getFirstChildElement(Node parent) {
172 NodeList childs = parent.getChildNodes();
173 for (int i = 0; i < childs.getLength(); i++) {
174 Node child = childs.item(i);
175 if (child instanceof Element ) {
176 return (Element ) child;
177 }
178 }
179 return null;
180 }
181
182
187 public static Element getNextSiblingElement(Element el) {
188 for (Node n = el.getNextSibling(); n != null; n = n.getNextSibling()) {
189 if (n instanceof Element ) {
190 return (Element ) n;
191 }
192 }
193 return null;
194 }
195
196
201 public static QName getQName(Element el) {
202 if (el == null) {
203 return null;
204 } else if (el.getPrefix() != null) {
205 return new QName (el.getNamespaceURI(), el.getLocalName(), el.getPrefix());
206 } else {
207 return new QName (el.getNamespaceURI(), el.getLocalName());
208 }
209 }
210
211 }
212 |
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