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16 package org.outerj.daisy.books.publisher.impl.publicationprocess;
17
18
19 import org.xml.sax.*;
20 import org.xml.sax.helpers.NamespaceSupport  ;
21 import org.apache.cocoon.xml.SaxBuffer;
22 import org.outerj.daisy.frontend.PreparedDocuments;
23 import org.outerj.daisy.repository.VariantKey;
24
25 import javax.xml.parsers.SAXParserFactory ;
26 import javax.xml.parsers.SAXParser ;
27 import java.io.InputStream ;
28 import java.util.Enumeration ;
29
30 public class PreparedDocumentsBuilder {
31 private static final String PUBLISHER_NAMESPACE = "http://outerx.org/daisy/1.0#publisher";
32
33 public static PreparedDocuments build(InputStream is) throws Exception {
34 SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
35 saxParserFactory.setNamespaceAware(true);
36 saxParserFactory.setValidating(false);
37 SAXParser saxParser = saxParserFactory.newSAXParser();
38
39 PreparedDocumentsHandler preparedDocumentsHandler = new PreparedDocumentsHandler();
40 XMLReader xmlReader = saxParser.getXMLReader();
41 xmlReader.setContentHandler(preparedDocumentsHandler);
42
43 InputSource inputSource = new InputSource(is);
44 xmlReader.parse(inputSource);
45
46 PreparedDocuments preparedDocuments = preparedDocumentsHandler.getPreparedDocuments();
47 if (preparedDocuments.getPreparedDocument(1) == null) {
48 throw new Exception ("Invalid preparedDocuments, there is no prepared document with ID 1.");
49 }
50 return preparedDocuments;
51 }
52
53 private static class PreparedDocumentsHandler implements ContentHandler {
54 private int elementNesting = 0;
55 private int currentPreparedDocumentId;
56 private VariantKey documentKey;
57 private SaxBuffer buffer;
58 private NamespaceSupport namespaceSupport = new NamespaceSupport ();
59 private PreparedDocuments preparedDocuments = new PreparedDocuments();
60
61 public PreparedDocuments getPreparedDocuments() {
62 return preparedDocuments;
63 }
64
65 public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
66 if (elementNesting < 2)
67 namespaceSupport.pushContext();
68
69 if (elementNesting == 0) {
70 if (!(namespaceURI.equals(PUBLISHER_NAMESPACE) && localName.equals("preparedDocuments"))) {
71 throw new SAXException("Expect as root element \"p:preparedDocuments\" but got \"" + qName + "\".");
72 }
73 } else if (elementNesting == 1) {
74 if (namespaceURI.equals(PUBLISHER_NAMESPACE) && localName.equals("preparedDocument")) {
75 currentPreparedDocumentId = Integer.parseInt(atts.getValue("id"));
76 long documentId = Long.parseLong(atts.getValue("documentId"));
77 long branchId = Long.parseLong(atts.getValue("branchId"));
78 long languageId = Long.parseLong(atts.getValue("languageId"));
79 documentKey = new VariantKey(documentId, branchId, languageId);
80 buffer = new SaxBuffer();
81 buffer.startDocument();
82 Enumeration prefixEnum = namespaceSupport.getPrefixes();
84 while (prefixEnum.hasMoreElements()) {
85 String prefix = (String )prefixEnum.nextElement();
86 if (!prefix.equals("xml"))
87 buffer.startPrefixMapping(prefix, namespaceSupport.getURI(prefix));
88 }
89 } else {
90 throw new SAXException("Encountered an unexpected element in preparedDocuments: \"" + qName + "\".");
91 }
92 } else if (elementNesting >= 2) {
93 buffer.startElement(namespaceURI, localName, qName, atts);
94 }
95 elementNesting++;
96 }
97
98 public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
99 elementNesting--;
100 if (elementNesting == 1) {
101 buffer.endDocument();
102 preparedDocuments.putPreparedDocument(currentPreparedDocumentId, documentKey, buffer);
103 buffer = null;
104 documentKey = null;
105 } else if (elementNesting >= 2) {
106 buffer.endElement(namespaceURI, localName, qName);
107 }
108 }
109
110 public void endDocument() throws SAXException {
111 }
113
114 public void startDocument() throws SAXException {
115 }
117
118 public void characters(char ch[], int start, int length) throws SAXException {
119 if (elementNesting >= 2)
120 buffer.characters(ch, start, length);
121 }
122
123 public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
124 if (elementNesting >= 2)
125 buffer.ignorableWhitespace(ch, start, length);
126 }
127
128 public void endPrefixMapping(String prefix) throws SAXException {
129 if (elementNesting >= 2)
130 buffer.endPrefixMapping(prefix);
131 }
132
133 public void skippedEntity(String name) throws SAXException {
134 if (elementNesting >= 2)
135 buffer.skippedEntity(name);
136 }
137
138 public void setDocumentLocator(Locator locator) {
139 if (elementNesting >= 2)
140 buffer.setDocumentLocator(locator);
141 }
142
143 public void processingInstruction(String target, String data) throws SAXException {
144 if (elementNesting >= 2)
145 buffer.processingInstruction(target, data);
146 }
147
148 public void startPrefixMapping(String prefix, String uri) throws SAXException {
149 if (elementNesting >= 2)
150 buffer.startPrefixMapping(prefix, uri);
151 else
152 namespaceSupport.declarePrefix(prefix, uri);
153 }
154 }
155 }
156 |
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