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16 package org.outerj.daisy.frontend;
17
18 import org.xml.sax.ContentHandler  ;
19 import org.xml.sax.SAXException ;
20 import org.xml.sax.Locator ;
21 import org.xml.sax.Attributes ;
22 import org.xml.sax.helpers.AttributesImpl ;
23 import org.apache.cocoon.xml.SaxBuffer;
24 import org.apache.cocoon.environment.Request;
25 import org.outerj.daisy.repository.VariantKey;
26
27 import java.util.Stack ;
28
29
35 public class PreparedDocumentsHandler implements ContentHandler {
36 private static final String PUBLISHER_NS = "http://outerx.org/daisy/1.0#publisher";
37 private ContentHandler consumer;
38 private int elementNesting = 0;
39 private PreparedDocInfo preparedDocInfo;
40 private Stack preparedDocumentStack = new Stack ();
41 private DocumentTypeSpecificStyler documentTypeSpecificStyler;
42 private Request request;
43
44 public PreparedDocumentsHandler(ContentHandler consumer, Request request, DocumentTypeSpecificStyler documentTypeSpecificStyler) {
45 this.request = request;
46 this.consumer = consumer;
47 this.documentTypeSpecificStyler = documentTypeSpecificStyler;
48 }
49
50 public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
51 elementNesting++;
52
53 if (namespaceURI.equals(PUBLISHER_NS) && localName.equals("preparedDocuments")
54 && atts.getValue("styledResultsId") == null && "true".equals(atts.getValue("applyDocumentTypeStyling"))) {
55 if (preparedDocInfo != null) {
56 preparedDocumentStack.push(preparedDocInfo);
57 }
58 preparedDocInfo = new PreparedDocInfo();
59 preparedDocInfo.prepDocsNesting = elementNesting;
60 } else if (preparedDocInfo != null && preparedDocInfo.prepDocNesting == 0
61 && namespaceURI.equals(PUBLISHER_NS) && localName.equals("preparedDocument")) {
62 preparedDocInfo.prepDocNesting = elementNesting;
63 int id = Integer.parseInt(atts.getValue("id"));
64 long documentId = Long.parseLong(atts.getValue("documentId"));
65 long branchId = Long.parseLong(atts.getValue("branchId"));
66 long languageId = Long.parseLong(atts.getValue("languageId"));
67 VariantKey documentKey = new VariantKey(documentId, branchId, languageId);
68 preparedDocInfo.buffer = new SaxBuffer();
69 preparedDocInfo.preparedDocuments.putPreparedDocument(id, documentKey, preparedDocInfo.buffer);
70 } else if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
71 preparedDocInfo.buffer.startElement(namespaceURI, localName, qName, atts);
72 } else if (preparedDocInfo == null) {
73 consumer.startElement(namespaceURI, localName, qName, atts);
74 }
75 }
76
77 public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
78 if (preparedDocInfo != null && preparedDocInfo.prepDocsNesting == elementNesting) {
79
80 try {
81 documentTypeSpecificStyler.transformPreparedDocuments(preparedDocInfo.preparedDocuments);
82 } catch (Exception e) {
83 throw new SAXException (e);
84 }
85
86 Long styledResultIdCounter = (Long )request.getAttribute("styledResultIdCounter");
87 if (styledResultIdCounter == null)
88 styledResultIdCounter = new Long (1);
89 else
90 styledResultIdCounter = new Long (styledResultIdCounter.longValue() + 1);
91 request.setAttribute("styledResultIdCounter", styledResultIdCounter);
92 String styledResultId = "styledResult-" + String.valueOf(styledResultIdCounter.longValue());
93
94 request.setAttribute(styledResultId, preparedDocInfo.preparedDocuments);
95
96 if (preparedDocumentStack.size() > 0) {
98 preparedDocInfo = (PreparedDocInfo)preparedDocumentStack.pop();
99 } else {
100 preparedDocInfo = null;
101 }
102
103 AttributesImpl attrs = new AttributesImpl ();
105 attrs.addAttribute("", "styledResultsId", "styledResultsId", "CDATA", styledResultId);
106 startElement(PUBLISHER_NS, "preparedDocuments", "p:preparedDocuments", attrs);
107 endElement(PUBLISHER_NS, "preparedDocuments", "p:preparedDocuments");
108
109 } else if (preparedDocInfo != null && preparedDocInfo.prepDocNesting == elementNesting) {
110 preparedDocInfo.prepDocNesting = 0;
111 preparedDocInfo.buffer = null;
112 } else if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
113 preparedDocInfo.buffer.endElement(namespaceURI, localName, qName);
114 } else if (preparedDocInfo == null) {
115 consumer.endElement(namespaceURI, localName, qName);
116 }
117
118 elementNesting--;
119 }
120
121 public void endDocument() throws SAXException {
122 consumer.endDocument();
123 }
124
125 public void startDocument() throws SAXException {
126 consumer.startDocument();
127 }
128
129 public void characters(char ch[], int start, int length) throws SAXException {
130 if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
131 preparedDocInfo.buffer.characters(ch, start, length);
132 } else if (preparedDocInfo == null) {
133 consumer.characters(ch, start, length);
134 }
135 }
136
137 public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
138 if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
139 preparedDocInfo.buffer.ignorableWhitespace(ch, start, length);
140 } else if (preparedDocInfo == null) {
141 consumer.ignorableWhitespace(ch, start, length);
142 }
143 }
144
145 public void endPrefixMapping(String prefix) throws SAXException {
146 if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
147 preparedDocInfo.buffer.endPrefixMapping(prefix);
148 } else if (preparedDocInfo == null) {
149 consumer.endPrefixMapping(prefix);
150 }
151 }
152
153 public void skippedEntity(String name) throws SAXException {
154 if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
155 preparedDocInfo.buffer.skippedEntity(name);
156 } else if (preparedDocInfo == null) {
157 consumer.skippedEntity(name);
158 }
159 }
160
161 public void setDocumentLocator(Locator locator) {
162 }
164
165 public void processingInstruction(String target, String data) throws SAXException {
166 if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
167 preparedDocInfo.buffer.processingInstruction(target, data);
168 } else if (preparedDocInfo == null) {
169 consumer.processingInstruction(target, data);
170 }
171 }
172
173 public void startPrefixMapping(String prefix, String uri) throws SAXException {
174 if (preparedDocInfo != null && preparedDocInfo.prepDocNesting > 0) {
175 preparedDocInfo.buffer.startPrefixMapping(prefix, uri);
176 } else if (preparedDocInfo == null) {
177 consumer.startPrefixMapping(prefix, uri);
178 }
179 }
180
181 static class PreparedDocInfo {
182 PreparedDocuments preparedDocuments = new PreparedDocuments();
183 SaxBuffer buffer;
184 int prepDocNesting = 0;
185 int prepDocsNesting;
186 }
187
188 }
189 |
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