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19 package org.java.plugin.registry.xml;
20
21 import java.io.IOException  ;
22 import java.io.InputStream ;
23 import java.io.InputStreamReader ;
24 import java.io.Reader ;
25 import java.io.StringReader ;
26 import java.net.URL ;
27
28 import javax.xml.parsers.ParserConfigurationException ;
29 import javax.xml.parsers.SAXParserFactory ;
30
31 import org.apache.commons.logging.Log;
32 import org.apache.commons.logging.LogFactory;
33 import org.java.plugin.util.IoUtil;
34 import org.xml.sax.EntityResolver ;
35 import org.xml.sax.InputSource ;
36 import org.xml.sax.SAXException ;
37
38
41 final class ManifestParser {
42 static Log log = LogFactory.getLog(ManifestParser.class);
43
44 static final String PLUGIN_DTD_1_0 = loadPluginDtd("1_0");
46 private static String loadPluginDtd(final String version) {
47 try {
48 Reader in = new InputStreamReader (
49 PluginRegistryImpl.class.getResourceAsStream("plugin_" + version + ".dtd"), "UTF-8"); try {
52 StringBuffer sBuf = new StringBuffer ();
53 char[] cBuf = new char[64];
54 int read;
55 while ((read = in.read(cBuf)) != -1) {
56 sBuf.append(cBuf, 0, read);
57 }
58 return sBuf.toString();
59 } finally {
60 in.close();
61 }
62 } catch (IOException ioe) {
63 log.error("can't read plug-in DTD file of version " + version, ioe); }
65 return null;
66 }
67
68 private static EntityResolver getDtdEntityResolver() {
69 return new EntityResolver () {
70 public InputSource resolveEntity(final String publicId,
71 final String systemId) {
72 if (publicId == null) {
73 log.debug("can't resolve entity, public ID is NULL, systemId=" + systemId); return null;
75 }
76 if (PLUGIN_DTD_1_0 == null) {
77 return null;
78 }
79 if (publicId.equals("-//JPF//Java Plug-in Manifest 1.0") || publicId.equals("-//JPF//Java Plug-in Manifest 0.7") || publicId.equals("-//JPF//Java Plug-in Manifest 0.6") || publicId.equals("-//JPF//Java Plug-in Manifest 0.5") || publicId.equals("-//JPF//Java Plug-in Manifest 0.4") || publicId.equals("-//JPF//Java Plug-in Manifest 0.3") || publicId.equals("-//JPF//Java Plug-in Manifest 0.2")) { if (log.isDebugEnabled()) {
87 log.debug("entity resolved to plug-in manifest DTD, publicId=" + publicId + ", systemId=" + systemId); }
90 return new InputSource (new StringReader (PLUGIN_DTD_1_0));
91 }
92 if (log.isDebugEnabled()) {
93 log.debug("entity not resolved, publicId=" + publicId + ", systemId=" + systemId); }
96 return null;
97 }
98 };
99 }
100
101 private final SAXParserFactory parserFactory;
102 private final EntityResolver entityResolver;
103
104 ManifestParser(final boolean isValidating) {
105 parserFactory = SAXParserFactory.newInstance();
106 parserFactory.setValidating(isValidating);
107 entityResolver = isValidating ? getDtdEntityResolver() : null;
108 log.info("got SAX parser factory - " + parserFactory); }
110
111 ModelPluginManifest parseManifest(final URL url)
112 throws ParserConfigurationException , SAXException , IOException {
113 ManifestHandler handler =
114 new ManifestHandler(entityResolver);
115 InputStream strm = IoUtil.getResourceInputStream(url);
117 try {
118 parserFactory.newSAXParser().parse(strm, handler);
119 } finally {
120 strm.close();
121 }
122 return handler.getResult();
123 }
124
125 ModelManifestInfo parseManifestInfo(final URL url)
126 throws ParserConfigurationException , SAXException , IOException {
127 ManifestInfoHandler handler =
128 new ManifestInfoHandler(entityResolver);
129 InputStream strm = IoUtil.getResourceInputStream(url);
131 try {
132 parserFactory.newSAXParser().parse(strm, handler);
133 } finally {
134 strm.close();
135 }
136 return handler.getResult();
137 }
138 }
139 |
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