Source Code Cross Referenced for XmlValidator.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » common » xml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.common.xml 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Sequoia: Database clustering technology.
003:         * Copyright (C) 2002-2004 French National Institute For Research In Computer
004:         * Science And Control (INRIA).
005:         * Contact: sequoia@continuent.org
006:         * 
007:         * Licensed under the Apache License, Version 2.0 (the "License");
008:         * you may not use this file except in compliance with the License.
009:         * You may obtain a copy of the License at
010:         * 
011:         * http://www.apache.org/licenses/LICENSE-2.0
012:         * 
013:         * Unless required by applicable law or agreed to in writing, software
014:         * distributed under the License is distributed on an "AS IS" BASIS,
015:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016:         * See the License for the specific language governing permissions and
017:         * limitations under the License. 
018:         *
019:         * Initial developer(s): Nicolas Modrzyk.
020:         * Contributor(s): 
021:         */package org.continuent.sequoia.common.xml;
022:
023:        import java.io.BufferedReader;
024:        import java.io.File;
025:        import java.io.FileReader;
026:        import java.io.IOException;
027:        import java.io.InputStream;
028:        import java.io.StringReader;
029:        import java.util.ArrayList;
030:
031:        import org.continuent.sequoia.common.i18n.Translate;
032:        import org.continuent.sequoia.controller.core.ControllerConstants;
033:        import org.xml.sax.ErrorHandler;
034:        import org.xml.sax.InputSource;
035:        import org.xml.sax.SAXException;
036:        import org.xml.sax.SAXParseException;
037:        import org.xml.sax.XMLReader;
038:        import org.xml.sax.ext.LexicalHandler;
039:        import org.xml.sax.helpers.DefaultHandler;
040:        import org.xml.sax.helpers.XMLReaderFactory;
041:
042:        /**
043:         * Validate a document and its DTD.
044:         * 
045:         * @author <a href="mailto:Nicolas.Modrzyk@inrialpes.fr">Nicolas Modrzyk </a>
046:         */
047:        public class XmlValidator extends DefaultHandler implements 
048:                ErrorHandler, LexicalHandler {
049:
050:            /** XML parser. */
051:            private XMLReader parser;
052:            private String pathToDtd;
053:            private boolean isXmlValid = false;
054:            private boolean isDtdValid = false;
055:            private String xmlContent;
056:            private ArrayList errors;
057:            private ArrayList warnings;
058:
059:            /**
060:             * Allow to use the xml validator as an external program
061:             * 
062:             * @param args the xmlfile and the dtd file
063:             * @throws Exception if fails
064:             */
065:            public static void main(String[] args) throws Exception {
066:                if (args.length < 1 || args.length > 2) {
067:                    System.out
068:                            .println("usage: XmlValidator [xmlFile] ([dtd]) ");
069:                    System.exit(0);
070:                }
071:
072:                String fileName = args[0];
073:                String dtdName = ControllerConstants.SEQUOIA_DTD_FILE;
074:                if (args.length == 2)
075:                    dtdName = args[1];
076:                else
077:                    System.out.println("Using default DTD:"
078:                            + ControllerConstants.SEQUOIA_DTD_FILE);
079:
080:                File dtd = null;
081:                dtd = new File(ClassLoader.getSystemResource(dtdName).getFile());
082:                File xmlFile = null;
083:                try {
084:                    xmlFile = new File(ClassLoader.getSystemResource(fileName)
085:                            .getFile());
086:                } catch (RuntimeException e) {
087:                    xmlFile = new File(fileName);
088:                }
089:
090:                if (!dtd.exists()) {
091:                    System.out.println("Cannot find specified dtd");
092:                    System.exit(1);
093:                }
094:                if (!xmlFile.exists()) {
095:                    System.out.println("Cannot find specified xml file");
096:                    System.exit(1);
097:                }
098:
099:                System.out.println("Validating:\tFile:" + xmlFile.getName()
100:                        + " with dtd:" + dtd.getName());
101:
102:                // Validate xml and dtd
103:                XmlValidator validator = new XmlValidator(
104:                        dtd.getAbsolutePath(), new FileReader(xmlFile));
105:
106:                // Display Results
107:                if (!validator.isDtdValid())
108:                    System.out.println("[FAILED:Dtd is not valid]");
109:                else if (!validator.isXmlValid())
110:                    System.out.println("[FAILED:xml is not valid]");
111:                else if (validator.isXmlValid())
112:                    System.out.println("[OK]");
113:
114:                if (validator.getLastException() != null) {
115:                    ArrayList errors = validator.getExceptions();
116:                    for (int i = 0; i < errors.size(); i++)
117:                        System.out.println("\t(parsing error):"
118:                                + ((Exception) errors.get(i)).getMessage());
119:                }
120:            }
121:
122:            /**
123:             * Check the given dtd, and the given xml are valid.
124:             * 
125:             * @param pathToDtd path to dtd
126:             * @param xml source to parse as a string
127:             */
128:            public XmlValidator(String pathToDtd, String xml) {
129:                validate(pathToDtd, xml);
130:            }
131:
132:            /**
133:             * @see #XmlValidator(String pathToDtd,String xml)
134:             */
135:            public XmlValidator(String pathToDtd, FileReader file)
136:                    throws IOException {
137:                // Read the file
138:                BufferedReader in = new BufferedReader(file);
139:                StringBuffer xml = new StringBuffer();
140:                String line;
141:                do {
142:                    line = in.readLine();
143:                    if (line != null)
144:                        xml.append(line.trim());
145:                } while (line != null);
146:                xmlContent = xml.toString();
147:                validate(pathToDtd, xmlContent);
148:            }
149:
150:            /**
151:             * get the xml that was formatted
152:             * 
153:             * @return xml
154:             */
155:            public String getXmlContent() {
156:                return xmlContent;
157:            }
158:
159:            /**
160:             * Starts the verification of the xml document AND the dtd
161:             * 
162:             * @param pathToDtd path
163:             * @param xml content
164:             */
165:            public void validate(String pathToDtd, String xml) {
166:                System.setProperty("org.xml.sax.driver",
167:                        "org.apache.crimson.parser.XMLReaderImpl");
168:                errors = new ArrayList();
169:                warnings = new ArrayList();
170:                try {
171:                    // Store dtd reference
172:                    this .pathToDtd = pathToDtd;
173:                    // Instantiate a new parser
174:                    parser = XMLReaderFactory.createXMLReader();
175:                    // Activate validation
176:                    parser.setFeature("http://xml.org/sax/features/validation",
177:                            true);
178:                    // Install error handler
179:                    parser.setErrorHandler(this );
180:                    // Install document handler
181:                    parser.setContentHandler(this );
182:                    parser.setProperty(
183:                            "http://xml.org/sax/properties/lexical-handler",
184:                            this );
185:                    // Install local entity resolver
186:                    parser.setEntityResolver(this );
187:                    InputSource input = new InputSource(new StringReader(xml));
188:                    parser.parse(input);
189:                } catch (Exception e) {
190:                    //throw new Exception("Xml document can not be validated.");
191:                    //e.printStackTrace();
192:                    addError(e);
193:                    isXmlValid = false;
194:                }
195:            }
196:
197:            /**
198:             * Allows to parse the document with a local copy of the DTD whatever the
199:             * original <code>DOCTYPE</code> found. Warning, this method is called only
200:             * if the XML document contains a <code>DOCTYPE</code>.
201:             * 
202:             * @see org.xml.sax.EntityResolver#resolveEntity(java.lang.String,
203:             *      java.lang.String)
204:             */
205:            public InputSource resolveEntity(String publicId, String systemId)
206:                    throws SAXException {
207:
208:                File dtd = new File(pathToDtd);
209:                if (dtd.exists()) {
210:                    try {
211:                        FileReader reader = new FileReader(dtd);
212:                        return new InputSource(reader);
213:                    } catch (Exception e) { //impossible
214:                    }
215:                }
216:
217:                InputStream stream = XmlValidator.class.getResourceAsStream("/"
218:                        + pathToDtd);
219:                if (stream == null) {
220:                    SAXException sax = new SAXException(
221:                            Translate
222:                                    .get(
223:                                            "virtualdatabase.xml.dtd.not.found", ControllerConstants.PRODUCT_NAME, pathToDtd)); //$NON-NLS-1$
224:                    addError(sax);
225:                    throw sax;
226:                }
227:
228:                return new InputSource(stream);
229:            }
230:
231:            /**
232:             * @see org.xml.sax.ErrorHandler#error(org.xml.sax.SAXParseException)
233:             */
234:            public void error(SAXParseException exception) throws SAXException {
235:                addError(exception);
236:            }
237:
238:            /**
239:             * @see org.xml.sax.ErrorHandler#fatalError(org.xml.sax.SAXParseException)
240:             */
241:            public void fatalError(SAXParseException exception)
242:                    throws SAXException {
243:                addError(exception);
244:            }
245:
246:            /**
247:             * @see org.xml.sax.ErrorHandler#warning(org.xml.sax.SAXParseException)
248:             */
249:            public void warning(SAXParseException exception)
250:                    throws SAXException {
251:                warnings.add(exception);
252:            }
253:
254:            /**
255:             * @see org.xml.sax.ContentHandler#endDocument()
256:             */
257:            public void endDocument() throws SAXException {
258:                if (errors.size() == 0)
259:                    this .isXmlValid = true;
260:            }
261:
262:            /**
263:             * @return Returns the isXmlValid.
264:             */
265:            public boolean isValid() {
266:                return isXmlValid && isDtdValid;
267:            }
268:
269:            /**
270:             * Return the last cause of parsing failure
271:             * 
272:             * @return exception, null if no exception
273:             */
274:            public Exception getLastException() {
275:                if (errors.size() == 0)
276:                    return null;
277:                else
278:                    return (Exception) errors.get(errors.size() - 1);
279:            }
280:
281:            /**
282:             * Retrieve an <code>ArrayList</code> of all parsing exceptions
283:             * 
284:             * @return an <code>ArrayList</code> of <code>Exception</code>
285:             */
286:            public ArrayList getExceptions() {
287:                return errors;
288:            }
289:
290:            /**
291:             * @see org.xml.sax.ext.LexicalHandler#comment(char[], int, int)
292:             */
293:            public void comment(char[] ch, int start, int length)
294:                    throws SAXException {
295:            }
296:
297:            /**
298:             * @see org.xml.sax.ext.LexicalHandler#endCDATA()
299:             */
300:            public void endCDATA() throws SAXException {
301:            }
302:
303:            /**
304:             * @see org.xml.sax.ext.LexicalHandler#endDTD()
305:             */
306:            public void endDTD() throws SAXException {
307:                if (errors.size() == 0) {
308:                    isDtdValid = true;
309:                } else {
310:                    isDtdValid = false;
311:                }
312:            }
313:
314:            /**
315:             * @see org.xml.sax.ext.LexicalHandler#endEntity(java.lang.String)
316:             */
317:            public void endEntity(String name) throws SAXException {
318:            }
319:
320:            /**
321:             * @see org.xml.sax.ext.LexicalHandler#startCDATA()
322:             */
323:            public void startCDATA() throws SAXException {
324:            }
325:
326:            /**
327:             * @see org.xml.sax.ext.LexicalHandler#startDTD(java.lang.String,
328:             *      java.lang.String, java.lang.String)
329:             */
330:            public void startDTD(String name, String publicId, String systemId)
331:                    throws SAXException {
332:            }
333:
334:            /**
335:             * @see org.xml.sax.ext.LexicalHandler#startEntity(java.lang.String)
336:             */
337:            public void startEntity(String name) throws SAXException {
338:            }
339:
340:            /**
341:             * @return Returns the isDtdValid.
342:             */
343:            public boolean isDtdValid() {
344:                return isDtdValid;
345:            }
346:
347:            /**
348:             * @param isDtdValid The isDtdValid to set.
349:             */
350:            public void setDtdValid(boolean isDtdValid) {
351:                this .isDtdValid = isDtdValid;
352:            }
353:
354:            /**
355:             * @return Returns the isXmlValid.
356:             */
357:            public boolean isXmlValid() {
358:                return isXmlValid;
359:            }
360:
361:            /**
362:             * @param isXmlValid The isXmlValid to set.
363:             */
364:            public void setXmlValid(boolean isXmlValid) {
365:                this .isXmlValid = isXmlValid;
366:            }
367:
368:            private void addError(Exception e) {
369:                errors.add(e);
370:            }
371:
372:            /**
373:             * @return Returns the warnings.
374:             */
375:            public ArrayList getWarnings() {
376:                return warnings;
377:            }
378:        }
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