Source Code Cross Referenced for DOMUtil.java in  » ESB » open-esb » com » sun » jbi » ui » 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.ui.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.ui.common;
030:
031:        import java.io.Reader;
032:        import java.io.StringReader;
033:        import java.io.Writer;
034:        import java.util.ArrayList;
035:        import javax.xml.parsers.DocumentBuilder;
036:        import javax.xml.parsers.DocumentBuilderFactory;
037:        import javax.xml.transform.OutputKeys;
038:        import javax.xml.transform.Transformer;
039:        import javax.xml.transform.TransformerConfigurationException;
040:        import javax.xml.transform.TransformerException;
041:        import javax.xml.transform.TransformerFactory;
042:        import javax.xml.transform.dom.DOMSource;
043:        import javax.xml.transform.stream.StreamResult;
044:        import org.w3c.dom.Document;
045:        import org.w3c.dom.Element;
046:        import org.w3c.dom.Node;
047:        import org.w3c.dom.NodeList;
048:        import org.w3c.dom.Text;
049:        import org.xml.sax.InputSource;
050:        import org.xml.sax.SAXException;
051:        import org.xml.sax.SAXParseException;
052:        import org.xml.sax.helpers.DefaultHandler;
053:
054:        /**
055:         * This object provides utility methods to manipulate DOM tree
056:         *
057:         * @author Sun Microsystems, Inc.
058:         */
059:        public class DOMUtil {
060:            /** static object to access the methods of this object */
061:            public static final DOMUtil UTIL = new DOMUtil();
062:
063:            /** Creates a new instance of DOMUtil */
064:            public DOMUtil() {
065:            }
066:
067:            /** gets the element
068:             * @return Element with tagname
069:             * @param aParentDocument Document for parent node
070:             * @param aTagName String for tagname
071:             */
072:            public Element getElement(Document aParentDocument, String aTagName) {
073:                NodeList nodeList = aParentDocument
074:                        .getElementsByTagName(aTagName);
075:                return (nodeList != null) ? (Element) nodeList.item(0) : null;
076:            }
077:
078:            /** get the child element
079:             * @param elem parent element
080:             * @param tagName element to look for
081:             * @return child element of type tagName
082:             */
083:            public Element getElement(Element elem, String tagName) {
084:                NodeList nl = elem.getElementsByTagName(tagName);
085:                Element childElem = (Element) nl.item(0);
086:
087:                return childElem;
088:            }
089:
090:            /** gets the element value
091:             * @param doc document
092:             * @param elemName element
093:             * @return value of the element
094:             */
095:            public String getElementValue(Document doc, String elemName) {
096:                String elemVal = null;
097:
098:                Element elem = getElement(doc, elemName);
099:                elemVal = getTextData(elem);
100:
101:                return elemVal;
102:            }
103:
104:            /** use this util method to create/retrieve a Text Node in a element
105:             * @param aElement Element node
106:             * @return Text node for text data
107:             */
108:            private Text getText(Element aElement) {
109:                Node node = null;
110:                aElement.normalize();
111:                node = aElement.getFirstChild();
112:                if (node == null || !(node instanceof  Text)) {
113:                    node = aElement.getOwnerDocument().createTextNode("");
114:                    aElement.appendChild(node);
115:                }
116:                return (Text) node;
117:            }
118:
119:            /** use this util method to set a Text Data in a element
120:             * @param aElement Element for text node
121:             * @param aData String contains text
122:             */
123:            public void setTextData(Element aElement, String aData) {
124:                getText(aElement).setData(aData);
125:            }
126:
127:            /** use this util method to retrieve a Text Data in a element
128:             * @param aElement Element for text node
129:             * @return String contains text
130:             */
131:            public String getTextData(Element aElement) {
132:                return getText(aElement).getData();
133:            }
134:
135:            /** save document to stream
136:             * @return xml text
137:             * @param aDocument Document
138:             * @param aWriter is what the aDocument is serialized to.
139:             * @throws Exception on error
140:             */
141:            public String DOM2String(Document aDocument, Writer aWriter)
142:                    throws Exception {
143:                TransformerFactory transformerFactory = TransformerFactory
144:                        .newInstance();
145:                Transformer transformer;
146:                try {
147:                    transformer = transformerFactory.newTransformer();
148:                } catch (TransformerConfigurationException e) {
149:                    transformer = null;
150:                    throw e;
151:                }
152:
153:                transformer.setOutputProperty(OutputKeys.METHOD, "xml");
154:                transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION,
155:                        "no");
156:                transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");
157:                transformer.setOutputProperty(
158:                        OutputKeys.CDATA_SECTION_ELEMENTS, "");
159:                transformer.setOutputProperty(OutputKeys.INDENT, "no");
160:                try {
161:                    transformer.transform(new DOMSource(aDocument),
162:                            new StreamResult(aWriter));
163:                } catch (TransformerException e) {
164:                    throw e;
165:                }
166:
167:                return aWriter.toString();
168:            }
169:
170:            /** gets list of elements
171:             * @return NodeList with tagname
172:             * @param aParentElement Element for parent
173:             * @param aTagName String for tagname
174:             */
175:            public NodeList getElements(Element aParentElement, String aTagName) {
176:                return aParentElement.getElementsByTagNameNS(aParentElement
177:                        .getNamespaceURI(), aTagName);
178:            }
179:
180:            /** gets set of elements
181:             * @return NodeList with tagname
182:             * @param aParentDocument Document for parent node
183:             * @param aTagName String for tagname
184:             */
185:            public NodeList getElements(Document aParentDocument,
186:                    String aTagName) {
187:                return aParentDocument.getElementsByTagNameNS("*", aTagName);
188:            }
189:
190:            /** get the children of the same type element tag name
191:             * @param aElement Element for parent node
192:             *
193:             * @param aElementTagName String for tagname
194:             * @return NodeList for list of children with the tagname
195:             */
196:            public NodeList getChildElements(Element aElement,
197:                    String aElementTagName) {
198:                NodeList nodeList = aElement.getChildNodes();
199:                NodeListImpl list = new NodeListImpl();
200:                int count = nodeList.getLength();
201:                for (int i = 0; i < count; ++i) {
202:                    Node node = nodeList.item(i);
203:                    if (node instanceof  Element) {
204:                        String tagName = getElementName((Element) node);
205:                        if (tagName.equals(aElementTagName)) {
206:                            list.add(node);
207:                        }
208:                    }
209:                }
210:                return list;
211:            }
212:
213:            /** get the child with the specified tag name
214:             * @param aElement Element for parent node
215:             *
216:             * @param aElementTagName String for tagname
217:             * @return NodeList for list of children with the tagname
218:             */
219:            public Element getChildElement(Element aElement,
220:                    String aElementTagName) {
221:                NodeList list = getChildElements(aElement, aElementTagName);
222:                if (list != null && list.getLength() > 0) {
223:                    return (Element) list.item(0);
224:                } else {
225:                    return null;
226:                }
227:            }
228:
229:            /**
230:             * get Element Tag Name with striped prefix.
231:             * @param aElement Element object
232:             * @return String with stripped prefix
233:             */
234:            public String getElementName(Element aElement) {
235:                String tagName = aElement.getTagName();
236:                return getName(tagName);
237:            }
238:
239:            /**
240:             * strips the prefix of the name if present
241:             * @param aName String value of Name with prefix
242:             * @return String for name after striping prefix
243:             */
244:            public String getName(String aName) {
245:                int lastIdx = aName.lastIndexOf(':');
246:                if (lastIdx >= 0) {
247:                    return aName.substring(lastIdx + 1);
248:                }
249:                return aName;
250:            }
251:
252:            /**
253:             * return the DOM Document
254:             * @param xmlText String
255:             * @return dom document
256:             * @throws Exception on parser exception or any other exception
257:             */
258:            public Document buildDOMDocument(String xmlText) throws Exception {
259:                StringReader reader = new StringReader(xmlText);
260:                return DOMUtil.UTIL.buildDOMDocument(reader);
261:            }
262:
263:            /**
264:             * return the DOM Document
265:             * @param xmlReader Reader
266:             * @return dom document
267:             * @throws Exception on parser exception or any other exception
268:             */
269:            public Document buildDOMDocument(Reader xmlReader) throws Exception {
270:                Document xmlDoc = null;
271:                DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory
272:                        .newInstance();
273:
274:                DocumentBuilder docBuilder = docBuilderFactory
275:                        .newDocumentBuilder();
276:                docBuilder.setErrorHandler(new DefaultHandler() {
277:                    public void fatalError(SAXParseException e)
278:                            throws SAXException {
279:                        throw new SAXException(e.getMessage());
280:                    }
281:                });
282:
283:                InputSource is = new InputSource(xmlReader);
284:                xmlDoc = docBuilder.parse(is);
285:
286:                return xmlDoc;
287:            }
288:
289:            /**
290:             * replaces the xml entity refereces with the xml escape chars
291:             * @param xmlString Text with the xml xml escape chars
292:             * @param Text with the xml entity refereces
293:             */
294:            public static String replaceXmlEscapeCharsToEntityRefereces(
295:                    String xmlString) {
296:                if (xmlString == null) {
297:                    return xmlString;
298:                }
299:
300:                // just convert < , > and & only
301:                StringBuffer sbuff = new StringBuffer(2 * xmlString.length());
302:                for (int i = 0; i < xmlString.length(); ++i) {
303:                    switch (xmlString.charAt(i)) {
304:                    case '&':
305:                        sbuff.append("&amp;");
306:                        break;
307:                    case '<':
308:                        sbuff.append("&lt;");
309:                        break;
310:                    case '>':
311:                        sbuff.append("&gt;");
312:                        break;
313:                    default:
314:                        sbuff.append(xmlString.charAt(i));
315:                    }
316:                }
317:                return sbuff.toString();
318:            }
319:
320:            /**
321:             * replaces the xml entity refereces with the xml escape chars
322:             * @param xmlString Text with the xml entity references
323:             * @param Text with the xml escape chars
324:             */
325:            public static String replaceXmlEntityReferecesToEscapeChars(
326:                    String xmlString) {
327:                if (xmlString == null) {
328:                    return xmlString;
329:                }
330:                // just look for these entity refereces only
331:                String[] entities = { "&lt;", "&gt;", "&amp;" };
332:                char[] escapeChar = { '<', '>', '&' };
333:
334:                StringBuffer sbuff = new StringBuffer(xmlString.length());
335:                // sbuff.
336:
337:                for (int i = 0; i < xmlString.length(); ++i) {
338:                    char ch = xmlString.charAt(i);
339:
340:                    if (ch != '&') {
341:                        // not found &. append the ch and continue
342:                        //                System.out.println("Non & Char " + ch);
343:                        sbuff.append(ch);
344:                        continue;
345:                    }
346:
347:                    String what = null;
348:                    boolean found = false;
349:                    int eIdx = 0;
350:                    // found & char at i
351:                    for (; eIdx < entities.length; ++eIdx) {
352:                        what = entities[eIdx];
353:                        found = xmlString.startsWith(what, i);
354:                        if (found) {
355:                            //                    System.out.println("Found Entity " + what);
356:                            break;
357:                        }
358:                    }
359:
360:                    if (!found) {
361:                        // not found the entity
362:                        //                System.out.println("Entity Not found");
363:                        continue;
364:                    }
365:
366:                    // found the entity. so replace it with escape ch
367:                    //            System.out.println("Appending escape char " + escapeChar[eIdx]);
368:                    sbuff.append(escapeChar[eIdx]);
369:                    //            System.out.println("Buff : " + sbuff.toString());
370:                    // now increment i to entity.length-1 as the i will be incremented +1 in the for loop
371:                    i += what.length() - 1;
372:                }
373:
374:                return sbuff.toString();
375:            }
376:
377:            /**
378:             * NodeListImpl
379:             *
380:             */
381:            public static class NodeListImpl extends ArrayList implements 
382:                    NodeList {
383:                /** Default Constructor
384:                 */
385:                public NodeListImpl() {
386:                    super ();
387:                }
388:
389:                /** nodelist length
390:                 * @return int for number of nodes in nodelist
391:                 */
392:                public int getLength() {
393:                    return this .size();
394:                }
395:
396:                /** return a node
397:                 * @param aIndex int for the index of the node
398:                 * @return Node at the index
399:                 */
400:                public Node item(int aIndex) {
401:                    return (Node) this.get(aIndex);
402:                }
403:            }
404:
405:        }
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