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17 package com.sun.syndication.io.impl;
18
19 import com.sun.syndication.feed.module.Module;
20 import com.sun.syndication.feed.module.DCModule;
21 import com.sun.syndication.feed.module.DCSubject;
22 import com.sun.syndication.io.ModuleGenerator;
23 import org.jdom.Attribute;
24 import org.jdom.Element;
25 import org.jdom.Namespace;
26
27 import java.util.ArrayList  ;
28 import java.util.Date ;
29 import java.util.Iterator ;
30 import java.util.List ;
31 import java.util.Set ;
32 import java.util.HashSet ;
33 import java.util.Collections ;
34
35
36
43 public class DCModuleGenerator implements ModuleGenerator {
44
45 private static final String DC_URI = "http://purl.org/dc/elements/1.1/";
46 private static final String TAXO_URI = "http://purl.org/rss/1.0/modules/taxonomy/";
47 private static final String RDF_URI = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
48
49 private static final Namespace DC_NS = Namespace.getNamespace("dc", DC_URI);
50 private static final Namespace TAXO_NS = Namespace.getNamespace("taxo", TAXO_URI);
51 private static final Namespace RDF_NS = Namespace.getNamespace("rdf", RDF_URI);
52
53 private static final Set NAMESPACES;
54
55 static {
56 Set nss = new HashSet ();
57 nss.add(DC_NS);
58 nss.add(TAXO_NS);
59 nss.add(RDF_NS);
60 NAMESPACES = Collections.unmodifiableSet(nss);
61 }
62
63 public final String getNamespaceUri() {
64 return DC_URI;
65 }
66
67 private final Namespace getDCNamespace() {
68 return DC_NS;
69 }
70
71 private final Namespace getRDFNamespace() {
72 return RDF_NS;
73 }
74
75 private final Namespace getTaxonomyNamespace() {
76 return TAXO_NS;
77 }
78
79
90 public final Set getNamespaces() {
91 return NAMESPACES;
92 }
93
94
100 public final void generate(Module module, Element element) {
101 DCModule dcModule = (DCModule) module;
102
103 if (dcModule.getTitle() != null) {
104 element.addContent(generateSimpleElementList("title", dcModule.getTitles()));
105 }
106 if (dcModule.getCreator() != null) {
107 element.addContent(generateSimpleElementList("creator", dcModule.getCreators()));
108 }
109 List subjects = dcModule.getSubjects();
110 for (int i = 0; i < subjects.size(); i++) {
111 element.addContent(generateSubjectElement((DCSubject) subjects.get(i)));
112 }
113 if (dcModule.getDescription() != null) {
114 element.addContent(generateSimpleElementList("description", dcModule.getDescriptions()));
115 }
116 if (dcModule.getPublisher() != null) {
117 element.addContent(generateSimpleElementList("publisher", dcModule.getPublishers()));
118 }
119 if (dcModule.getContributors() != null) {
120 element.addContent(generateSimpleElementList("contributor", dcModule.getContributors()));
121 }
122 if (dcModule.getDate() != null) {
123 for (Iterator i = dcModule.getDates().iterator(); i.hasNext();) {
124 element.addContent(generateSimpleElement("date",
125 DateParser.formatW3CDateTime((Date ) i.next())));
126 }
127 }
128 if (dcModule.getType() != null) {
129 element.addContent(generateSimpleElementList("type", dcModule.getTypes()));
130 }
131 if (dcModule.getFormat() != null) {
132 element.addContent(generateSimpleElementList("format", dcModule.getFormats()));
133 }
134 if (dcModule.getIdentifier() != null) {
135 element.addContent(generateSimpleElementList("identifier", dcModule.getIdentifiers()));
136 }
137 if (dcModule.getSource() != null) {
138 element.addContent(generateSimpleElementList("source", dcModule.getSources()));
139 }
140 if (dcModule.getLanguage() != null) {
141 element.addContent(generateSimpleElementList("language", dcModule.getLanguages()));
142 }
143 if (dcModule.getRelation() != null) {
144 element.addContent(generateSimpleElementList("relation", dcModule.getRelations()));
145 }
146 if (dcModule.getCoverage() != null) {
147 element.addContent(generateSimpleElementList("coverage", dcModule.getCoverages()));
148 }
149 if (dcModule.getRights() != null) {
150 element.addContent(generateSimpleElementList("rights", dcModule.getRightsList()));
151 }
152 }
153
154
160 protected final Element generateSubjectElement(DCSubject subject) {
161 Element subjectElement = new Element("subject", getDCNamespace());
162
163 if (subject.getTaxonomyUri() != null) {
164 Element descriptionElement = new Element("Description", getRDFNamespace());
165 Element topicElement = new Element("topic", getTaxonomyNamespace());
166 Attribute resourceAttribute = new Attribute("resource", subject.getTaxonomyUri(), getRDFNamespace());
167 topicElement.setAttribute(resourceAttribute);
168 descriptionElement.addContent(topicElement);
169
170 if (subject.getValue() != null) {
171 Element valueElement = new Element("value", getRDFNamespace());
172 valueElement.addContent(subject.getValue());
173 descriptionElement.addContent(valueElement);
174 }
175 subjectElement.addContent(descriptionElement);
176 } else {
177 subjectElement.addContent(subject.getValue());
178 }
179 return subjectElement;
180 }
181
182
183
190 protected final Element generateSimpleElement(String name, String value) {
191 Element element = new Element(name, getDCNamespace());
192 element.addContent(value);
193
194 return element;
195 }
196
197
204 protected final List generateSimpleElementList(String name, List value) {
205 List elements = new ArrayList ();
206 for (Iterator i = value.iterator(); i.hasNext();) {
207 elements.add(generateSimpleElement(name, (String ) i.next()));
208 }
209
210 return elements;
211 }
212 }
213 |
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