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package org.apache.any23.vocab; |
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import org.apache.any23.io.nquads.NQuadsWriter; |
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import org.apache.any23.rdf.RDFUtils; |
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import org.apache.any23.util.DiscoveryUtils; |
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import org.apache.any23.util.StringUtils; |
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import org.openrdf.model.URI; |
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import org.openrdf.model.vocabulary.RDF; |
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import org.openrdf.model.vocabulary.RDFS; |
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import org.openrdf.rio.RDFHandlerException; |
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import org.openrdf.rio.RDFWriter; |
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import org.openrdf.rio.ntriples.NTriplesWriter; |
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import org.openrdf.rio.rdfxml.RDFXMLWriter; |
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import java.io.ByteArrayOutputStream; |
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import java.io.PrintStream; |
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import java.lang.reflect.Constructor; |
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import java.util.List; |
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import java.util.Map; |
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public class RDFSchemaUtils { |
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46 | 0 | private static final String RDF_XML_SEPARATOR = StringUtils.multiply('=', 100); |
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51 | 0 | public enum VocabularyFormat { |
52 | 0 | NQuads, |
53 | 0 | NTriples, |
54 | 0 | RDFXML |
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} |
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public static void serializeVocabulary( |
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URI namespace, |
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URI[] classes, |
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URI[] properties, |
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Map<URI,String> comments, |
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RDFWriter writer |
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) throws RDFHandlerException { |
75 | 0 | writer.startRDF(); |
76 | 0 | for(URI clazz : classes) { |
77 | 0 | writer.handleStatement( RDFUtils.quad(clazz, RDF.TYPE, RDFS.CLASS, namespace) ); |
78 | 0 | writer.handleStatement( RDFUtils.quad(clazz, RDFS.MEMBER, namespace, namespace) ); |
79 | 0 | final String comment = comments.get(clazz); |
80 | 0 | if(comment != null) |
81 | 0 | writer.handleStatement( RDFUtils.quad(clazz, RDFS.COMMENT, RDFUtils.literal(comment), namespace) ); |
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} |
83 | 0 | for(URI property : properties) { |
84 | 0 | writer.handleStatement(RDFUtils.quad(property, RDF.TYPE, RDF.PROPERTY, namespace)); |
85 | 0 | writer.handleStatement(RDFUtils.quad(property, RDFS.MEMBER, namespace, namespace)); |
86 | 0 | final String comment = comments.get(property); |
87 | 0 | if(comment != null) |
88 | 0 | writer.handleStatement( RDFUtils.quad(property, RDFS.COMMENT, RDFUtils.literal(comment), namespace) ); |
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} |
90 | 0 | writer.endRDF(); |
91 | 0 | } |
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public static void serializeVocabulary(Vocabulary vocabulary, RDFWriter writer) |
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throws RDFHandlerException { |
102 | 0 | serializeVocabulary( |
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vocabulary.getNamespace(), |
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vocabulary.getClasses(), |
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vocabulary.getProperties(), |
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vocabulary.getComments(), |
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writer |
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); |
109 | 0 | } |
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public static void serializeVocabulary( |
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Vocabulary vocabulary, |
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VocabularyFormat format, |
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boolean willFollowAnother, |
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PrintStream ps |
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) throws RDFHandlerException { |
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final RDFWriter rdfWriter; |
127 | 0 | if(format == VocabularyFormat.RDFXML) { |
128 | 0 | rdfWriter = new RDFXMLWriter(ps); |
129 | 0 | if(willFollowAnother) |
130 | 0 | ps.print("\n"); |
131 | 0 | ps.print(RDF_XML_SEPARATOR); |
132 | 0 | ps.print("\n"); |
133 | 0 | } else if(format == VocabularyFormat.NTriples) { |
134 | 0 | rdfWriter = new NTriplesWriter(ps); |
135 | 0 | } else if(format == VocabularyFormat.NQuads) { |
136 | 0 | rdfWriter = new NQuadsWriter(ps); |
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} |
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else { |
139 | 0 | throw new IllegalArgumentException("Unsupported format " + format); |
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} |
141 | 0 | serializeVocabulary(vocabulary, rdfWriter); |
142 | 0 | } |
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public static String serializeVocabulary(Vocabulary vocabulary, VocabularyFormat format) |
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throws RDFHandlerException { |
154 | 0 | final ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
155 | 0 | final PrintStream ps = new PrintStream(baos); |
156 | 0 | serializeVocabulary(vocabulary, format, false, ps); |
157 | 0 | ps.close(); |
158 | 0 | return baos.toString(); |
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} |
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public static void serializeVocabularies(VocabularyFormat format, PrintStream ps) { |
168 | 0 | final Class vocabularyClass = Vocabulary.class; |
169 | 0 | final List<Class> vocabularies = DiscoveryUtils.getClassesInPackage( |
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vocabularyClass.getPackage().getName(), |
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vocabularyClass |
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); |
173 | 0 | int currentIndex = 0; |
174 | 0 | for (Class vocabClazz : vocabularies) { |
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final Vocabulary instance; |
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try { |
177 | 0 | final Constructor constructor = vocabClazz.getDeclaredConstructor(); |
178 | 0 | constructor.setAccessible(true); |
179 | 0 | instance = (Vocabulary) constructor.newInstance(); |
180 | 0 | } catch (Exception e) { |
181 | 0 | throw new RuntimeException("Error while instantiating vocabulary class " + vocabClazz, e); |
182 | 0 | } |
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try { |
184 | 0 | serializeVocabulary(instance, format, currentIndex < vocabularies.size() - 2, ps); |
185 | 0 | } catch (RDFHandlerException rdfhe) { |
186 | 0 | throw new RuntimeException("Error while serializing vocabulary.", rdfhe); |
187 | 0 | } |
188 | 0 | } |
189 | 0 | } |
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191 | 0 | private RDFSchemaUtils() {} |
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} |