|
1
16 package org.outerj.daisy.frontend;
17
18 import org.apache.cocoon.transformation.AbstractTransformer;
19 import org.apache.cocoon.environment.SourceResolver;
20 import org.apache.cocoon.ProcessingException;
21 import org.apache.cocoon.xml.AttributesImpl;
22 import org.apache.avalon.framework.parameters.Parameters;
23 import org.xml.sax.SAXException  ;
24 import org.xml.sax.Attributes ;
25 import org.xml.sax.Locator ;
26 import org.outerj.daisy.util.Constants;
27
28 import java.util.Map ;
29 import java.util.regex.Pattern ;
30 import java.util.regex.Matcher ;
31 import java.io.IOException ;
32
33 public class CrossRefParserTransformer extends AbstractTransformer {
34 private static final Pattern CROSS_REF_PATTERN = Pattern.compile("^([^:]+):(.+)$");
35 private StringBuffer crossRefBuffer;
36 private int nesting;
37 private int crossRefNesting;
38
39 public void setup(SourceResolver sourceResolver, Map map, String string, Parameters parameters) throws ProcessingException, SAXException , IOException {
40 this.crossRefBuffer = null;
41 this.nesting = 0;
42 this.crossRefNesting = -1;
43 }
44
45 public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
46 nesting++;
47 if (uri.equals("") && localName.equals("span") && "crossreference".equals(attributes.getValue("class")) && crossRefNesting == -1) {
48 crossRefBuffer = new StringBuffer ();
49 crossRefNesting = nesting;
50 } else if (crossRefNesting == -1) {
51 super.startElement(uri, localName, qName, attributes);
52 }
53 }
54
55 public void characters(char[] chars, int start, int length) throws SAXException {
56 if (crossRefNesting != -1) {
57 crossRefBuffer.append(chars, start, length);
58 } else {
59 super.characters(chars, start, length);
60 }
61 }
62
63 public void endElement(String uri, String localName, String qName) throws SAXException {
64 if (nesting == crossRefNesting) {
65 String crossref = crossRefBuffer.toString().trim();
66 Matcher crossRefMatcher = CROSS_REF_PATTERN.matcher(crossref);
67
68 String crossRefType;
69 String crossRefTarget = null;
70 String crossRefBookTarget = null;
71
72 if (crossRefMatcher.matches()) {
73 crossRefType = crossRefMatcher.group(1);
74 crossRefTarget = crossRefMatcher.group(2);
75 Matcher targetMatcher = Constants.DAISY_LINK_PATTERN.matcher(crossRefTarget);
76 if (targetMatcher.matches()) {
77 String targetDocId = targetMatcher.group(1);
78 String fragId = targetMatcher.group(8);
79 crossRefBookTarget = "#dsy" + targetDocId;
80 if (fragId != null)
81 crossRefBookTarget = crossRefBookTarget + "_" + fragId.substring(1);
82 } else if (crossRefTarget.startsWith("#")) {
83 crossRefBookTarget = crossRefTarget;
84 } else {
85 crossRefType = "invalid";
86 crossRefTarget = null;
87 crossRefBookTarget = null;
88 }
89 } else {
90 crossRefType = "invalid";
92 }
93
94 AttributesImpl crossRefAttrs = new AttributesImpl();
95 crossRefAttrs.addCDATAAttribute("class", "crossreference");
96 if (crossRefType != null)
97 crossRefAttrs.addCDATAAttribute("crossRefType", crossRefType);
98 if (crossRefTarget != null)
99 crossRefAttrs.addCDATAAttribute("crossRefTarget", crossRefTarget);
100 if (crossRefBookTarget != null)
101 crossRefAttrs.addCDATAAttribute("crossRefBookTarget", crossRefBookTarget);
102 super.startElement("", "span", "span", crossRefAttrs);
103 super.characters(crossref.toCharArray(), 0, crossref.length());
104 super.endElement("", "span", "span");
105
106 crossRefNesting = -1;
107 crossRefBuffer = null;
108 } else if (crossRefNesting == -1) {
109 super.endElement(uri, localName, qName);
110 }
111 nesting--;
112 }
113
114 public void setDocumentLocator(Locator locator) {
115 if (crossRefNesting == -1)
116 super.setDocumentLocator(locator);
117 }
118
119 public void startDocument() throws SAXException {
120 if (crossRefNesting == -1)
121 super.startDocument();
122 }
123
124 public void endDocument() throws SAXException {
125 if (crossRefNesting == -1)
126 super.endDocument();
127 }
128
129 public void startPrefixMapping(String string, String string1) throws SAXException {
130 if (crossRefNesting == -1)
131 super.startPrefixMapping(string, string1);
132 }
133
134 public void endPrefixMapping(String string) throws SAXException {
135 if (crossRefNesting == -1)
136 super.endPrefixMapping(string);
137 }
138
139 public void ignorableWhitespace(char[] chars, int i, int i1) throws SAXException {
140 if (crossRefNesting == -1)
141 super.ignorableWhitespace(chars, i, i1);
142 }
143
144 public void processingInstruction(String string, String string1) throws SAXException {
145 if (crossRefNesting == -1)
146 super.processingInstruction(string, string1);
147 }
148
149 public void skippedEntity(String string) throws SAXException {
150 if (crossRefNesting == -1)
151 super.skippedEntity(string);
152 }
153
154 public void startDTD(String string, String string1, String string2) throws SAXException {
155 if (crossRefNesting == -1)
156 super.startDTD(string, string1, string2);
157 }
158
159 public void endDTD() throws SAXException {
160 if (crossRefNesting == -1)
161 super.endDTD();
162 }
163
164 public void startEntity(String string) throws SAXException {
165 if (crossRefNesting == -1)
166 super.startEntity(string);
167 }
168
169 public void endEntity(String string) throws SAXException {
170 if (crossRefNesting == -1)
171 super.endEntity(string);
172 }
173
174 public void startCDATA() throws SAXException {
175 if (crossRefNesting == -1)
176 super.startCDATA();
177 }
178
179 public void endCDATA() throws SAXException {
180 if (crossRefNesting == -1)
181 super.endCDATA();
182 }
183
184 public void comment(char[] chars, int i, int i1) throws SAXException {
185 if (crossRefNesting == -1)
186 super.comment(chars, i, i1);
187 }
188 }
189 |
Popular Tags |
Java API By Example, From Geeks To Geeks.