Source Code Cross Referenced for XMLUtil.java in  » Workflow-Engines » wfmopen-2.1.1 » de » danet » an » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » wfmopen 2.1.1 » de.danet.an.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of the WfMOpen project.
003:         * Copyright (C) 2001-2003 Danet GmbH (www.danet.de), GS-AN.
004:         * All rights reserved.
005:         *
006:         * This program is free software; you can redistribute it and/or modify
007:         * it under the terms of the GNU General Public License as published by
008:         * the Free Software Foundation; either version 2 of the License, or
009:         * (at your option) any later version.
010:         *
011:         * This program is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:         * GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         *
020:         * $Id: XMLUtil.java,v 1.5 2007/01/15 15:58:40 drmlipp Exp $
021:         *
022:         * $Log: XMLUtil.java,v $
023:         * Revision 1.5  2007/01/15 15:58:40  drmlipp
024:         * Use form title to set portlet title.
025:         *
026:         * Revision 1.4  2006/12/12 09:42:22  drmlipp
027:         * Added URIs and W3C DOM to string helper.
028:         *
029:         * Revision 1.3.4.3  2006/12/11 12:10:43  drmlipp
030:         * Added comment.
031:         *
032:         * Revision 1.3.4.2  2006/12/05 16:37:22  drmlipp
033:         * Added namespaces.
034:         *
035:         * Revision 1.3.4.1  2006/11/27 16:57:33  drmlipp
036:         * Outputting event.
037:         *
038:         * Revision 1.3  2006/09/29 12:32:08  drmlipp
039:         * Consistently using WfMOpen as projct name now.
040:         *
041:         * Revision 1.2  2006/03/08 14:46:42  drmlipp
042:         * Synchronized with 1.3.3p5.
043:         *
044:         * Revision 1.1.1.4.6.3  2005/12/16 10:55:11  drmlipp
045:         * Fixed new methods' signature.
046:         *
047:         * Revision 1.1.1.4.6.2  2005/12/16 09:38:50  drmlipp
048:         * Added support for parsing local datetime specifications.
049:         *
050:         * Revision 1.1.1.4.6.1  2005/12/14 09:56:26  drmlipp
051:         * Added support for parsing xsd:double.
052:         *
053:         * Revision 1.1.1.4  2004/08/18 15:17:35  drmlipp
054:         * Update to 1.2
055:         *
056:         * Revision 1.10  2004/03/16 17:04:27  lipp
057:         * Added some useful constansts.
058:         *
059:         * Revision 1.9  2003/09/07 19:40:07  lipp
060:         * Fixed handling of milliseconds.
061:         *
062:         * Revision 1.8  2003/09/05 15:08:39  lipp
063:         * Fixed sign handling.
064:         *
065:         * Revision 1.7  2003/09/05 11:15:43  lipp
066:         * Added parsing of XSD duration.
067:         *
068:         * Revision 1.6  2003/09/05 09:44:05  lipp
069:         * Fixed wrong usage of SimpleDateFormat (isn't thread safe).
070:         *
071:         * Revision 1.5  2003/06/27 08:51:46  lipp
072:         * Fixed copyright/license information.
073:         *
074:         * Revision 1.4  2003/05/01 17:52:54  lipp
075:         * Added xmlns uri.
076:         *
077:         * Revision 1.3  2003/03/31 17:01:36  huaiyang
078:         * error with indexOutOfBoundException fixed.
079:         *
080:         * Revision 1.2  2003/03/31 12:43:12  huaiyang
081:         * String of DateTime with millisec supported.
082:         *
083:         * Revision 1.1  2003/03/27 16:32:20  lipp
084:         * Started support for addditional data types.
085:         *
086:         */
087:        package de.danet.an.util;
088:
089:        import java.util.Date;
090:        import java.util.TimeZone;
091:        import java.util.regex.Matcher;
092:        import java.util.regex.Pattern;
093:
094:        import java.io.StringWriter;
095:        import java.text.DateFormat;
096:        import java.text.ParseException;
097:        import java.text.SimpleDateFormat;
098:
099:        import javax.xml.transform.Transformer;
100:        import javax.xml.transform.TransformerConfigurationException;
101:        import javax.xml.transform.TransformerException;
102:        import javax.xml.transform.TransformerFactory;
103:        import javax.xml.transform.TransformerFactoryConfigurationError;
104:        import javax.xml.transform.dom.DOMSource;
105:        import javax.xml.transform.stream.StreamResult;
106:
107:        import org.w3c.dom.Element;
108:        import org.w3c.dom.Node;
109:
110:        /**
111:         * This class provides some utility functions for handling XML.
112:         *
113:         * @author <a href="mailto:lipp@danet.de">Michael Lipp</a>
114:         * @version $Revision: 1.5 $
115:         */
116:        public class XMLUtil {
117:
118:            private static DateFormat xsdGMTDateTimeFormat;
119:            private static DateFormat xsdLocalDateTime;
120:            static {
121:                xsdGMTDateTimeFormat = new SimpleDateFormat(
122:                        "yyyy-MM-dd'T'HH:mm:ss'Z'");
123:                xsdGMTDateTimeFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
124:                xsdLocalDateTime = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
125:            }
126:
127:            /** The URI for xmlns attributes. */
128:            public static final String XMLNS_NS = "http://www.w3.org/2000/xmlns/";
129:
130:            /** The URI for XML schema. */
131:            public static final String XMLNS_SCHEMA = "http://www.w3.org/2001/XMLSchema";
132:
133:            /** The URI for XML schema instance. */
134:            public static final String XMLNS_SCHEMA_INSTANCE = "http://www.w3.org/2001/XMLSchema-instance";
135:
136:            /** The URI for XForms. */
137:            public static final String XMLNS_XFORMS = "http://www.w3.org/2002/xforms";
138:
139:            /** The URI for XHTML */
140:            public static final String XMLNS_XHTML = "http://www.w3.org/1999/xhtml";
141:
142:            /**
143:             * Parses dateTime string as specified in <a
144:             * href="http://www.w3.org/TR/xmlschema-2/#dateTime"> XML Schema
145:             * Part 2</a>, i.e. '-'? CCYY '-' MM '-' DD 'T' hh ':' mm ':' ss ['.' s+] 
146:             * ['Z' | ('+'|'-') hh ':' mm].
147:             * @param dateTime the date and time string.
148:             * @return parsed date.
149:             * @throws ParseException if the string cannot be parsed.
150:             */
151:            public static Date parseXsdDateTime(String dateTime)
152:                    throws ParseException {
153:                DateFormat dateTimeFormat = (DateFormat) xsdLocalDateTime
154:                        .clone();
155:                String millis = null;
156:                int posOfExt = 19;
157:                if (dateTime.charAt(0) == '-') {
158:                    posOfExt = 20;
159:                }
160:                if (dateTime.length() > posOfExt) {
161:                    char c = dateTime.charAt(posOfExt);
162:                    if (c == '.') {
163:                        // if the given datetime has ms, separate them
164:                        int eoms = posOfExt + 1;
165:                        while (eoms < dateTime.length()
166:                                && Character.isDigit(dateTime.charAt(eoms))) {
167:                            eoms += 1;
168:                        }
169:                        millis = dateTime.substring(posOfExt, eoms);
170:                        dateTime = dateTime.substring(0, posOfExt)
171:                                + dateTime.substring(eoms);
172:                    }
173:                    if (dateTime.length() > posOfExt) {
174:                        c = dateTime.charAt(posOfExt);
175:                        if (c == '+' || c == '-') {
176:                            dateTimeFormat.setTimeZone(TimeZone
177:                                    .getTimeZone("GMT"
178:                                            + dateTime.substring(posOfExt)));
179:                            dateTime = dateTime.substring(0, posOfExt);
180:                        } else if (c == 'Z') {
181:                            dateTimeFormat.setTimeZone(TimeZone
182:                                    .getTimeZone("GMT"));
183:                        } else {
184:                            throw new ParseException(
185:                                    "Illegal timezone specification: "
186:                                            + dateTime, posOfExt);
187:                        }
188:                    }
189:                }
190:                Date res = dateTimeFormat.parse(dateTime);
191:                if (millis != null) {
192:                    res.setTime(res.getTime()
193:                            + Math.round(Float.parseFloat(millis) * 1000));
194:                }
195:                return res;
196:            }
197:
198:            /**
199:             * Convert a given date to a XSD compliant datetime representation with
200:             * unspecified timezone (i.e. local time).
201:             * @param timestamp the date to convert.
202:             * @return the result.
203:             */
204:            public static String toXsdLocalDateTime(Date timestamp) {
205:                return xsdLocalDateTime.format(timestamp);
206:            }
207:
208:            /**
209:             * Convert date given as milliseconds since January 1, 1970, 00:00:00 GMT 
210:             * to a XSD compliant datetime representation with unspecified 
211:             * timezone (i.e. local time).
212:             * @param time the time to convert.
213:             * @return the result.
214:             */
215:            public static String toXsdLocalDateTime(long time) {
216:                return xsdLocalDateTime.format(new Date(time));
217:            }
218:
219:            /**
220:             * Convert a given date to a XSD compliant GMT datetime representation.
221:             * @param timestamp the date to convert.
222:             * @return the result.
223:             */
224:            public static String toXsdGMTDateTime(Date timestamp) {
225:                return xsdGMTDateTimeFormat.format(timestamp);
226:            }
227:
228:            /**
229:             * Convert date given as milliseconds since January 1, 1970, 00:00:00 GMT 
230:             * to a XSD compliant GMT datetime representation.
231:             * @param time the time to convert.
232:             * @return the result.
233:             */
234:            public static String toXsdGMTDateTime(long time) {
235:                return xsdLocalDateTime.format(new Date(time));
236:            }
237:
238:            private static Pattern parsePat = Pattern
239:                    .compile("^(-)?P(([0-9]+?)Y)?(([0-9]+?)M)?(([0-9]+?)D)?"
240:                            + "(T(([0-9]+?)H)?(([0-9]+?)M)?(([0-9\\.]+?)S)?)?$");
241:
242:            /**
243:             * Parses duration string as specified in <a
244:             * href="http://www.w3.org/TR/xmlschema-2/#duration"> XML Schema
245:             * Part 2</a>, i.e. [-]P[nY][nM][nD][T[nH][nM][n[.m]S]], with at
246:             * least on value in the time part if it exists or one value in
247:             * the date part if the time part does not exist.
248:             * @param duration the duration to be parsed
249:             * @return parsed duration
250:             * @throws ParseException if the string cannot be parsed
251:             */
252:            public static Duration parseXsdDuration(String duration)
253:                    throws ParseException {
254:                Duration res = new Duration();
255:                Matcher m = parsePat.matcher(duration);
256:                if (!m.matches()) {
257:                    throw new ParseException(
258:                            "Invalid duration specification: \"" + duration
259:                                    + "\".", 0);
260:                }
261:                int sign = 1;
262:                String g = m.group(1);
263:                if (g != null) {
264:                    sign = -1;
265:                }
266:                try {
267:                    g = m.group(3);
268:                    if (g != null) {
269:                        res.setYears(sign * Integer.parseInt(g));
270:                    }
271:                    g = m.group(5);
272:                    if (g != null) {
273:                        res.setMonths(sign * Integer.parseInt(g));
274:                    }
275:                    g = m.group(7);
276:                    if (g != null) {
277:                        res.setDays(sign * Integer.parseInt(g));
278:                    }
279:                    g = m.group(10);
280:                    if (g != null) {
281:                        res.setHours(sign * Integer.parseInt(g));
282:                    }
283:                    g = m.group(12);
284:                    if (g != null) {
285:                        res.setMinutes(sign * Integer.parseInt(g));
286:                    }
287:                    g = m.group(14);
288:                    if (g != null) {
289:                        res.setSeconds(sign * Float.parseFloat(g));
290:                    }
291:                    return res;
292:                } catch (NumberFormatException e) {
293:                    throw new ParseException(e.getMessage(), 0);
294:                }
295:            }
296:
297:            /**
298:             * Parses a float or double string as specified in <a
299:             * href="http://www.w3.org/TR/xmlschema-2/#float"> XML Schema
300:             * Part 2</a>.
301:             * @param number the string to parse.
302:             * @return parsed value.
303:             * @throws NumberFormatException if the string cannot be parsed.
304:             */
305:            public static double parseXsdDouble(String number)
306:                    throws NumberFormatException {
307:                number = number.trim();
308:                if (number.equals("INF")) {
309:                    return Double.POSITIVE_INFINITY;
310:                }
311:                if (number.equals("-INF")) {
312:                    return Double.NEGATIVE_INFINITY;
313:                }
314:                return Double.parseDouble(number);
315:            }
316:
317:            /**
318:             * Parses a boolean string as specified in <a
319:             * href="http://www.w3.org/TR/xmlschema-2/#boolean"> XML Schema
320:             * Part 2</a>.
321:             * @param value the string to parse.
322:             * @return parsed result.
323:             * @throws ParseException if the string cannot be parsed.
324:             */
325:            public static boolean parseXsdBoolean(String value)
326:                    throws ParseException {
327:                value = value.trim();
328:                if (value.equals("true") || value.equals("1")) {
329:                    return true;
330:                }
331:                if (value.equals("false") || value.equals("0")) {
332:                    return false;
333:                }
334:                throw new ParseException("Not an xsd boolean: " + value, 0);
335:            }
336:
337:            /**
338:             * Returns the text contents of this node, similar to 
339:             * <a href="http://java.sun.com/j2se/1.5.0/docs/api/org/w3c/dom/Node.html#getTextContent()">
340:             * http://java.sun.com/j2se/1.5.0/docs/api/org/w3c/dom/Node.html#getTextContent()</a>
341:             * but without recursion.
342:             * 
343:             * @param node the node.
344:             * @return text content.
345:             */
346:            public static String getFirstLevelTextContent(Node node) {
347:                if (node.getNodeType() == Node.ATTRIBUTE_NODE) {
348:                    return node.getNodeValue();
349:                }
350:                StringBuffer buffer = new StringBuffer();
351:
352:                for (Node child = node.getFirstChild(); child != null; child = child
353:                        .getNextSibling()) {
354:                    if (child.getNodeType() == Node.TEXT_NODE
355:                            || child.getNodeType() == Node.CDATA_SECTION_NODE) {
356:                        buffer.append(child.getNodeValue());
357:                    }
358:                }
359:                return buffer.toString();
360:            }
361:
362:            /**
363:             * Converts a W3C DOM tree to an XML string. 
364:             * @param tree the W3C DOM root
365:             * @return the result
366:             */
367:            public static String w3cDomToString(Element tree) {
368:                try {
369:                    Transformer t = TransformerFactory.newInstance()
370:                            .newTransformer();
371:                    t.setOutputProperty("indent", "yes");
372:                    StringWriter out = new StringWriter();
373:                    t.transform(new DOMSource(tree), new StreamResult(out));
374:                    return (out.toString());
375:                } catch (TransformerConfigurationException e) {
376:                    return "<exception>" + e.getMessage() + "</exception>";
377:                } catch (TransformerFactoryConfigurationError e) {
378:                    return "<exception>" + e.getMessage() + "</exception>";
379:                } catch (TransformerException e) {
380:                    return "<exception>" + e.getMessage() + "</exception>";
381:                }
382:            }
383:        }
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