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1
19 package org.netbeans.modules.j2ee.websphere6.dd.loaders;
20
21 import javax.xml.parsers.ParserConfigurationException  ;
22 import javax.xml.parsers.SAXParser ;
23 import javax.xml.parsers.SAXParserFactory ;
24 import org.openide.filesystems.FileObject;
26
27 import org.netbeans.modules.schema2beans.BaseBean;
28
29
33 import java.io.*;
34 import org.xml.sax.*;
35
37
38
43 public class DDUtils {
44
45 private static final String EXCEPTION_PREFIX="version";
47
55
56
57
58
60 public static String getVersion(InputSource is) throws IOException, SAXException {
61 javax.xml.parsers.SAXParserFactory fact = javax.xml.parsers.SAXParserFactory.newInstance();
62 fact.setValidating(false);
63 try {
64 javax.xml.parsers.SAXParser parser = fact.newSAXParser();
65 XMLReader reader = parser.getXMLReader();
66 reader.setContentHandler(new VersionHandler());
67 reader.setEntityResolver(DDResolver.getInstance());
68 try {
69 reader.parse(is);
70 } catch (SAXException ex) {
71 String message = ex.getMessage();
72 if (message!=null && message.startsWith(EXCEPTION_PREFIX))
73 return message.substring(EXCEPTION_PREFIX.length());
74 else throw new SAXException(org.openide.util.NbBundle.getMessage(DDUtils.class, "MSG_cannotParse"),ex);
75 }
76 throw new SAXException(org.openide.util.NbBundle.getMessage(DDUtils.class, "MSG_cannotFindRoot"));
77 } catch(javax.xml.parsers.ParserConfigurationException ex) {
78 throw new SAXException(org.openide.util.NbBundle.getMessage(DDUtils.class, "MSG_parserProblem"),ex);
79 }
80 }
81
82 private static class VersionHandler extends org.xml.sax.helpers.DefaultHandler {
83 public void startElement(String uri, String localName, String rawName, Attributes atts) throws SAXException {
84 if ("WebAppBinging".equals(rawName)) { String version = atts.getValue("version"); throw new SAXException(EXCEPTION_PREFIX);
87 }
88 }
89 }
90
91 private static class DDResolver implements EntityResolver {
92 static DDResolver resolver;
93 static synchronized DDResolver getInstance() {
94 if (resolver==null) {
95 resolver=new DDResolver();
96 }
97 return resolver;
98 }
99 public InputSource resolveEntity (String publicId, String systemId) {
100 String resource=null;
101 if ("-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN".equals(publicId)) { resource="/org/netbeans/modules/j2ee/dd/impl/resources/web-app_2_3.dtd"; } else if ("-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN".equals(publicId)) { resource="/org/netbeans/modules/j2ee/dd/impl/resources/web-app_2_2.dtd"; } else if (systemId!=null && systemId.endsWith("web-app_2_4.xsd")) {
107 resource="/org/netbeans/modules/j2ee/dd/impl/resources/web-app_2_4.xsd"; }
109 if (resource==null) return null;
110 java.net.URL url = this.getClass().getResource(resource);
111 return new InputSource(url.toString());
112 }
113 }
114
115 private static class ErrorHandler implements org.xml.sax.ErrorHandler {
116 private int errorType=-1;
117 SAXParseException error;
118
119 public void warning(org.xml.sax.SAXParseException sAXParseException) throws org.xml.sax.SAXException {
120 if (errorType<0) {
121 errorType=0;
122 error=sAXParseException;
123 }
124 }
126 public void error(org.xml.sax.SAXParseException sAXParseException) throws org.xml.sax.SAXException {
127 if (errorType<1) {
128 errorType=1;
129 error=sAXParseException;
130 }
131 }
133 public void fatalError(org.xml.sax.SAXParseException sAXParseException) throws org.xml.sax.SAXException {
134 errorType=2;
135 throw sAXParseException;
136 }
137
138 public int getErrorType() {
139 return errorType;
140 }
141 public SAXParseException getError() {
142 return error;
143 }
144 }
145
146 public static SAXParseException parse (InputSource is)
147 throws org.xml.sax.SAXException , java.io.IOException {
148 ErrorHandler errorHandler = new ErrorHandler();
149 try {
150 SAXParser parser = createSAXParserFactory().newSAXParser();
151 XMLReader reader = parser.getXMLReader();
152 reader.setErrorHandler(errorHandler);
153 reader.parse(is);
158 SAXParseException error = errorHandler.getError();
159 if (error!=null) return error;
160 } catch (ParserConfigurationException ex) {
161 throw new SAXException(ex.getMessage());
162 } catch (SAXException ex) {
163 throw ex;
164 }
165 return null;
166 }
167
168
170 private static SAXParserFactory createSAXParserFactory() throws ParserConfigurationException {
171 try {
172 SAXParserFactory fact = SAXParserFactory.newInstance();
173 if (fact!=null) {
174 try {
175 fact.getClass().getMethod("getSchema", new Class []{}); return fact;
177 } catch (NoSuchMethodException ex) {}
178 }
179 return (SAXParserFactory ) Class.forName("org.apache.xerces.jaxp.SAXParserFactoryImpl").newInstance(); } catch (Exception ex) {
181 throw new ParserConfigurationException (ex.getMessage());
182 }
183 }
184 } |
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