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16 package org.outerj.daisy.navigation.impl;
17
18 import org.apache.xmlbeans.XmlObject;
19 import org.apache.xmlbeans.SchemaType;
20 import org.apache.xmlbeans.XmlOptions;
21 import org.outerj.daisy.navigation.NavigationException;
22 import org.outerj.daisy.navigation.NavigationVersionMode;
23 import org.outerj.daisy.repository.*;
24 import org.outerj.daisy.xmlutil.LocalSAXParserFactory;
25
26 import javax.xml.namespace.QName  ;
27 import java.io.StringReader ;
28 import java.io.InputStream ;
29 import java.io.BufferedInputStream ;
30 import java.util.Map ;
31 import java.util.HashMap ;
32 import java.util.Stack ;
33 import java.lang.reflect.InvocationTargetException ;
34 import java.lang.reflect.Constructor ;
35
36
41 public class NavigationFactory {
42 private static String [] PART_NAMES = {"NavigationDescription", "BookDefinitionDescription"};
43
44 private static Map NAVIGATION_BUILDERS;
45 static {
46 NAVIGATION_BUILDERS = new HashMap ();
47 try {
48 NAVIGATION_BUILDERS.put(new QName ("http://outerx.org/daisy/1.0#navigationspec", "navigationTree"), DefaultNavigationBuilder.class.getConstructor(new Class [0]));
49 NAVIGATION_BUILDERS.put(new QName ("http://outerx.org/daisy/1.0#bookdef", "book"), BookNavigationBuilder.class.getConstructor(new Class [0]));
50 } catch (Exception e) {
51 throw new RuntimeException ("Error initializing navigation builders map.", e);
52 }
53 }
54
55 static interface NavigationBuilder {
56 Node build(XmlObject xmlObject, long branchId, long languageId, NavigationVersionMode versionMode,
57 CommonNavigationManager.Context context, Counter counter, Stack importStack) throws RepositoryException;
58
59 SchemaType getSchemaType();
60 }
61
62
65 public static Node build(String navigationXml, long branchId, long languageId, NavigationVersionMode versionMode,
66 CommonNavigationManager.Context context, Counter counter, Stack importStack) throws NavigationException {
67 try {
68 XmlOptions xmlOptions = new XmlOptions().setLoadUseXMLReader(LocalSAXParserFactory.newXmlReader());
69 XmlObject navTreeXml = XmlObject.Factory.parse(new StringReader (navigationXml), xmlOptions);
70 return build(navTreeXml, branchId, languageId, versionMode, context, counter, importStack);
71 } catch (Throwable e) {
72 throw new NavigationException("Error building navigation tree.", e);
73 }
74 }
75
76 public static Node build(VariantKey navigationDoc, NavigationVersionMode versionMode,
77 CommonNavigationManager.Context context, Counter counter, Stack importStack) throws NavigationException {
78 try {
79 Document document = context.getRepository().getDocument(navigationDoc.getDocumentId(), navigationDoc.getBranchId(), navigationDoc.getLanguageId(), false);
80
81 Version version;
82 if (versionMode == NavigationVersionMode.LIVE) {
83 version = document.getLiveVersion();
84 if (version == null)
85 throw new NavigationException(navigationDoc + " does not have a live version.");
86 } else if (versionMode == NavigationVersionMode.LAST) {
87 version = document.getLastVersion();
88 } else {
89 throw new NavigationException("Unexepected NavigationVersionMode: " + versionMode);
90 }
91
92 String partName = null;
93 for (int i = 0; i < PART_NAMES.length; i++) {
94 if (version.hasPart(PART_NAMES[i])) {
95 partName = PART_NAMES[i];
96 break;
97 }
98 }
99
100 if (partName == null)
101 throw new NavigationException(navigationDoc + " (version mode: " + versionMode + ") does not contain a part from which a navigation tree can be build.");
102
103 Part part = version.getPart(partName);
104
105 XmlObject xmlObject;
106 InputStream is = part.getDataStream();
107 try {
108 XmlOptions xmlOptions = new XmlOptions().setLoadUseXMLReader(LocalSAXParserFactory.newXmlReader());
109 xmlObject = XmlObject.Factory.parse(new BufferedInputStream (is), xmlOptions);
110 } finally {
111 is.close();
112 }
113
114 return build(xmlObject, navigationDoc.getBranchId(), navigationDoc.getLanguageId(), versionMode, context, counter, importStack);
115 } catch (Throwable e) {
116 throw new NavigationException("Error building navigation tree.", e);
117 }
118 }
119
120 private static Node build(XmlObject xmlObject, long branchId, long languageId, NavigationVersionMode versionMode,
121 CommonNavigationManager.Context context, Counter counter, Stack importStack) throws NavigationException {
122 XmlObject[] result = xmlObject.selectPath("*");
124 QName rootEl = result[0].newCursor().getName();
125
126 Constructor buildConstructor = (Constructor )NAVIGATION_BUILDERS.get(rootEl);
127 if (buildConstructor == null) {
128 throw new NavigationException("Provided XML does not contain a recognized navigation format.");
129 }
130
131 NavigationBuilder navigationBuilder;
132 try {
133 navigationBuilder = (NavigationBuilder)buildConstructor.newInstance(new Object [0]);
134 } catch (IllegalAccessException e) {
135 throw new NavigationException("Unexpected IllegalAccessException.", e);
136 } catch (InvocationTargetException e) {
137 throw new NavigationException("Error building navigation tree.", e.getTargetException());
138 } catch (InstantiationException e) {
139 throw new NavigationException("Error instantiating navigation tree builder.", e);
140 }
141
142 XmlObject typedXmlObject = xmlObject.changeType(navigationBuilder.getSchemaType());
143 if (!typedXmlObject.validate()) {
144 throw new NavigationException("Provided XML does is not valid.");
145 }
146
147 try {
148 return navigationBuilder.build(typedXmlObject, branchId, languageId, versionMode, context, counter, importStack);
149 } catch (RepositoryException e) {
150 throw new NavigationException("Error building navigation tree.", e);
151 }
152 }
153 }
154 |
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