Source Code Cross Referenced for DOMUtil.java in  » ESB » open-esb » com » sun » jbi » common » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ESB » open esb » com.sun.jbi.common 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * BEGIN_HEADER - DO NOT EDIT
003:         *
004:         * The contents of this file are subject to the terms
005:         * of the Common Development and Distribution License
006:         * (the "License").  You may not use this file except
007:         * in compliance with the License.
008:         *
009:         * You can obtain a copy of the license at
010:         * https://open-esb.dev.java.net/public/CDDLv1.0.html.
011:         * See the License for the specific language governing
012:         * permissions and limitations under the License.
013:         *
014:         * When distributing Covered Code, include this CDDL
015:         * HEADER in each file and include the License file at
016:         * https://open-esb.dev.java.net/public/CDDLv1.0.html.
017:         * If applicable add the following below this CDDL HEADER,
018:         * with the fields enclosed by brackets "[]" replaced with
019:         * your own identifying information: Portions Copyright
020:         * [year] [name of copyright owner]
021:         */
022:
023:        /*
024:         * @(#)DOMUtil.java
025:         * Copyright 2004-2007 Sun Microsystems, Inc. All Rights Reserved.
026:         *
027:         * END_HEADER - DO NOT EDIT
028:         */
029:        package com.sun.jbi.common;
030:
031:        import org.w3c.dom.Document;
032:        import org.w3c.dom.Element;
033:        import org.w3c.dom.Node;
034:        import org.w3c.dom.NodeList;
035:        import org.w3c.dom.Text;
036:
037:        import java.io.Writer;
038:
039:        import java.util.ArrayList;
040:
041:        import javax.xml.transform.OutputKeys;
042:        import javax.xml.transform.Transformer;
043:        import javax.xml.transform.TransformerFactory;
044:        import javax.xml.transform.dom.DOMSource;
045:        import javax.xml.transform.stream.StreamResult;
046:
047:        /**
048:         * This object provides utility methods to manipulate DOM tree.
049:         *
050:         * @author Sun Microsystems, Inc.
051:         */
052:        public class DOMUtil {
053:            /**
054:             * static object to access the methods of this object.
055:             */
056:            public static final DOMUtil UTIL = new DOMUtil();
057:
058:            /**
059:             * Creates a new instance of DOMUtil.
060:             */
061:            public DOMUtil() {
062:            }
063:
064:            /**
065:             * gets the element.
066:             *
067:             * @param aParentDocument Document for parent node
068:             * @param aTagName String for tagname
069:             *
070:             * @return Element with tagname
071:             */
072:            public Element getElement(Document aParentDocument, String aTagName) {
073:                NodeList nodeList = aParentDocument
074:                        .getElementsByTagName(aTagName);
075:
076:                return (nodeList != null) ? (Element) nodeList.item(0) : null;
077:            }
078:
079:            /**
080:             * gets the element.
081:             *
082:             * @param elem Element for parent node
083:             * @param tagName String for tagname
084:             *
085:             * @return Element with tagname
086:             */
087:            public Element getElement(Element elem, String tagName) {
088:                NodeList nl = elem.getElementsByTagName(tagName);
089:                Element childElem = (Element) nl.item(0);
090:
091:                return childElem;
092:            }
093:
094:            /**
095:             * gets the element value.
096:             *
097:             * @param doc Document for parent node
098:             * @param elemName String for element name
099:             *
100:             * @return Element value
101:             */
102:            public String getElementValue(Document doc, String elemName) {
103:                String elemVal = null;
104:
105:                Element elem = getElement(doc, elemName);
106:                elemVal = getTextData(elem);
107:
108:                return elemVal;
109:            }
110:
111:            /**
112:             * use this util method to create/retrieve a Text Node in a element.
113:             *
114:             * @param aElement Element node
115:             *
116:             * @return Text node for text data
117:             */
118:            private Text getText(Element aElement) {
119:                Node node = null;
120:                aElement.normalize();
121:                node = aElement.getFirstChild();
122:
123:                if ((node == null) || !(node instanceof  Text)) {
124:                    node = aElement.getOwnerDocument().createTextNode("");
125:                    aElement.appendChild(node);
126:                }
127:
128:                return (Text) node;
129:            }
130:
131:            /**
132:             * use this util method to set a Text Data in a element.
133:             *
134:             * @param aElement Element for text node
135:             * @param aData String contains text
136:             */
137:            public void setTextData(Element aElement, String aData) {
138:                getText(aElement).setData(aData);
139:            }
140:
141:            /**
142:             * use this util method to retrieve a Text Data in a element.
143:             *
144:             * @param aElement Element for text node
145:             *
146:             * @return String contains text
147:             */
148:            public String getTextData(Element aElement) {
149:                return getText(aElement).getData();
150:            }
151:
152:            /**
153:             * save document to stream.
154:             *
155:             * @param aDocument Document
156:             * @param aWriter is what the aDocument is serialized to.
157:             *
158:             * @return String representation of Document
159:             *
160:             * @throws Exception If fails to construct a string.
161:             */
162:            public String DOM2String(Document aDocument, Writer aWriter)
163:                    throws Exception {
164:                TransformerFactory transformerFactory = TransformerFactory
165:                        .newInstance();
166:                Transformer transformer;
167:
168:                try {
169:                    transformer = transformerFactory.newTransformer();
170:                } catch (javax.xml.transform.TransformerConfigurationException e) {
171:                    e.printStackTrace();
172:                    transformer = null;
173:                    throw e;
174:                }
175:
176:                transformer.setOutputProperty(OutputKeys.METHOD, "xml");
177:                transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION,
178:                        "no");
179:                transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");
180:                transformer.setOutputProperty(
181:                        OutputKeys.CDATA_SECTION_ELEMENTS, "");
182:                transformer.setOutputProperty(OutputKeys.INDENT, "no");
183:
184:                try {
185:                    transformer.transform(new DOMSource(aDocument),
186:                            new StreamResult(aWriter));
187:                } catch (javax.xml.transform.TransformerException e) {
188:                    e.printStackTrace();
189:                    throw e;
190:                }
191:
192:                return aWriter.toString();
193:            }
194:
195:            /**
196:             * gets list of elements.
197:             *
198:             * @param aParentElement Element for parent
199:             * @param aTagName String for tagname
200:             *
201:             * @return NodeList with tagname
202:             */
203:            public NodeList getElements(Element aParentElement, String aTagName) {
204:                return aParentElement.getElementsByTagNameNS(aParentElement
205:                        .getNamespaceURI(), aTagName);
206:            }
207:
208:            /**
209:             * gets set of elements.
210:             *
211:             * @param aParentDocument Document for parent node
212:             * @param aTagName String for tagname
213:             *
214:             * @return NodeList with tagname
215:             */
216:            public NodeList getElements(Document aParentDocument,
217:                    String aTagName) {
218:                return aParentDocument.getElementsByTagNameNS("*", aTagName);
219:            }
220:
221:            /**
222:             * get the children of the same type element tag name.
223:             *
224:             * @param aElement Element for parent node
225:             * @param aElementTagName String for tagname
226:             *
227:             * @return NodeList for list of children with the tagname
228:             */
229:            public NodeList getChildElements(Element aElement,
230:                    String aElementTagName) {
231:                NodeList nodeList = aElement.getChildNodes();
232:                NodeListImpl list = new NodeListImpl();
233:                int count = nodeList.getLength();
234:
235:                for (int i = 0; i < count; ++i) {
236:                    Node node = nodeList.item(i);
237:
238:                    if (node instanceof  Element) {
239:                        String tagName = getElementName((Element) node);
240:
241:                        if (tagName.equals(aElementTagName)) {
242:                            list.add(node);
243:                        }
244:                    }
245:                }
246:
247:                return list;
248:            }
249:
250:            /**
251:             * get Element Tag Name with striped prefix.
252:             *
253:             * @param aElement Element object
254:             *
255:             * @return String with stripped prefix
256:             */
257:            public String getElementName(Element aElement) {
258:                String tagName = aElement.getTagName();
259:
260:                return getName(tagName);
261:            }
262:
263:            /**
264:             * strips the prefix of the name if present.
265:             *
266:             * @param aName String value of Name with prefix
267:             *
268:             * @return String for name after striping prefix
269:             */
270:            public String getName(String aName) {
271:                int lastIdx = aName.lastIndexOf(':');
272:
273:                if (lastIdx >= 0) {
274:                    return aName.substring(lastIdx + 1);
275:                }
276:
277:                return aName;
278:            }
279:
280:            /**
281:             * NodeListImpl.
282:             */
283:            public static class NodeListImpl extends ArrayList implements 
284:                    NodeList {
285:                /**
286:                 * Default Constructor.
287:                 */
288:                public NodeListImpl() {
289:                    super ();
290:                }
291:
292:                /**
293:                 * nodelist length.
294:                 *
295:                 * @return int for number of nodes in nodelist
296:                 */
297:                public int getLength() {
298:                    return this .size();
299:                }
300:
301:                /**
302:                 * return a node.
303:                 *
304:                 * @param aIndex int for the index of the node
305:                 *
306:                 * @return Node at the index
307:                 */
308:                public Node item(int aIndex) {
309:                    return (Node) this.get(aIndex);
310:                }
311:            }
312:        }
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