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1
19 package org.java.plugin.registry.xml;
20
21 import java.io.IOException  ;
22 import java.util.LinkedList ;
23
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26 import org.xml.sax.EntityResolver ;
27 import org.xml.sax.InputSource ;
28 import org.xml.sax.SAXException ;
29 import org.xml.sax.SAXParseException ;
30 import org.xml.sax.helpers.DefaultHandler ;
31
32
36 abstract class BaseHandler extends DefaultHandler {
37 protected final Log log = LogFactory.getLog(getClass());
38 protected final EntityResolver entityResolver;
39
40 BaseHandler(final EntityResolver anEntityResolver) {
41 entityResolver = anEntityResolver;
42 }
43
44
48 public InputSource resolveEntity(final String publicId,
49 final String systemId) throws SAXException {
50 if (entityResolver != null) {
51 try {
52 return entityResolver.resolveEntity(publicId, systemId);
53 } catch (SAXException se) {
54 throw se;
55 } catch (IOException ioe) {
56 throw new SAXException ("I/O error has occurred - " + ioe, ioe); }
58 }
59 log.warn("ignoring publicId=" + publicId + " and systemId=" + systemId); return null;
62 }
63
64
67 public void warning(final SAXParseException e) {
68 log.warn("non-fatal error while parsing XML document", e); }
70
71
74 public void error(final SAXParseException e) throws SAXException {
75 if (entityResolver != null) {
76 log.error("failed parsing XML resource in validating mode", e); throw e;
79 }
80 log.warn("ignoring parse error", e); }
82
83
86 public void fatalError(final SAXParseException e) throws SAXException {
87 log.fatal("failed parsing XML resource", e); throw e;
89 }
90 }
91
92 class SimpleStack {
93 private LinkedList data;
94
95 SimpleStack() {
96 data = new LinkedList ();
97 }
98
99 Object pop() {
100 return data.isEmpty() ? null : data.removeLast();
101 }
102
103 void push(final Object obj) {
104 data.addLast(obj);
105 }
106
107 int size() {
108 return data.size();
109 }
110 }
111 |
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