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209
.../skos-printer/src/main/java/fr/sparna/rdf/skos/printer/reader/DocumentMetadataReader.java
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| package fr.sparna.rdf.skos.printer.reader; | ||
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| import java.net.URI; | ||
| import java.text.DateFormat; | ||
| import java.text.ParseException; | ||
| import java.text.SimpleDateFormat; | ||
| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.Date; | ||
| import java.util.List; | ||
| import java.util.Locale; | ||
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| import javax.xml.bind.JAXBElement; | ||
| import javax.xml.namespace.QName; | ||
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| import org.openrdf.model.Literal; | ||
| import org.openrdf.model.Resource; | ||
| import org.openrdf.model.Value; | ||
| import org.openrdf.model.vocabulary.DC; | ||
| import org.openrdf.model.vocabulary.DCTERMS; | ||
| import org.openrdf.query.TupleQueryResultHandlerException; | ||
| import org.openrdf.repository.Repository; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import fr.sparna.rdf.sesame.toolkit.query.Perform; | ||
| import fr.sparna.rdf.sesame.toolkit.query.SparqlPerformException; | ||
| import fr.sparna.rdf.sesame.toolkit.util.LabelReader; | ||
| import fr.sparna.rdf.sesame.toolkit.util.PreferredPropertyReader; | ||
| import fr.sparna.rdf.skos.printer.schema.ElementContainer; | ||
| import fr.sparna.rdf.skos.printer.schema.ObjectFactory; | ||
| import fr.sparna.rdf.skos.printer.schema.SimpleLiteral; | ||
| import fr.sparna.rdf.skos.toolkit.GetConceptSchemesHelper; | ||
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| public class DocumentMetadataReader { | ||
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| private Logger log = LoggerFactory.getLogger(this.getClass().getName()); | ||
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| protected Repository repository; | ||
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| public DocumentMetadataReader(Repository repository) { | ||
| super(); | ||
| this.repository = repository; | ||
| } | ||
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| public ElementContainer readKosDocumentMetadata(final String lang, final URI conceptScheme) | ||
| throws SparqlPerformException { | ||
| ElementContainer m = new ElementContainer(); | ||
| final ObjectFactory objectFactory = new ObjectFactory(); | ||
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| URI conceptSchemeToUse = conceptScheme; | ||
| if (conceptSchemeToUse == null) { | ||
| // try to find if their is a single concept scheme in the data, then take this one. | ||
| List<Resource> conceptSchemes = findConceptSchemes(); | ||
| if(conceptSchemes.size() > 1) { | ||
| log.debug("Found "+conceptSchemes.size()+" ConceptSchemes ("+conceptSchemes+"), can't determine which one to use"); | ||
| } else if (conceptSchemes.size() == 0) { | ||
| log.debug("Found 0 ConceptSchemes, can't generate header."); | ||
| } else { | ||
| conceptSchemeToUse = URI.create(conceptSchemes.get(0).stringValue()); | ||
| log.debug("Determined ConceptScheme automatically : "+conceptSchemeToUse); | ||
| } | ||
| } | ||
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| if (conceptSchemeToUse != null) { | ||
| // this will try to read in turn all the properties defined in a LabelReader | ||
| // skos:prefLabel, rdfs:sourceConceptLabel | ||
| LabelReader labelReader = new LabelReader(this.repository, "", lang); | ||
| // add dcterms title and dc title | ||
| labelReader.getProperties().add(URI.create(DCTERMS.TITLE.toString())); | ||
| labelReader.getProperties().add(URI.create(DC.TITLE.toString())); | ||
| String label = LabelReader.display(labelReader.getValues(conceptSchemeToUse)); | ||
| if(label != null) { | ||
| m.getAny().add(createSimpleLiteralValue(label, lang, new DCCreator() { | ||
| public JAXBElement<SimpleLiteral> createDc(SimpleLiteral value) { | ||
| return objectFactory.createTitle(value); | ||
| } | ||
| })); | ||
| } | ||
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| MetadataReader reader = new MetadataReader(conceptSchemeToUse, lang); | ||
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| // read a description in the given language | ||
| reader.process(m, | ||
| Arrays.asList(new URI[]{java.net.URI.create(DCTERMS.DESCRIPTION.stringValue()), java.net.URI.create(DC.DESCRIPTION.stringValue())}), | ||
| new DCCreator() { | ||
| public JAXBElement<SimpleLiteral> createDc(SimpleLiteral value) { | ||
| return objectFactory.createDescription(value); | ||
| } | ||
| } | ||
| ); | ||
|
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| // read a date | ||
| reader.process(m, | ||
| Arrays.asList(new URI[]{java.net.URI.create(DCTERMS.ISSUED.stringValue()), java.net.URI.create(DCTERMS.MODIFIED.stringValue()), java.net.URI.create(DCTERMS.CREATED.stringValue()), java.net.URI.create(DC.DATE.stringValue())}), | ||
| new DCCreator() { | ||
| public JAXBElement<SimpleLiteral> createDc(SimpleLiteral value) { | ||
| return objectFactory.createDate(value); | ||
| } | ||
| } | ||
| ); | ||
|
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| // read an author/creator | ||
| reader.process(m, | ||
| Arrays.asList(new URI[]{java.net.URI.create(DCTERMS.CREATOR.stringValue()), java.net.URI.create(DC.CREATOR.stringValue())}), | ||
| new DCCreator() { | ||
| public JAXBElement<SimpleLiteral> createDc(SimpleLiteral value) { | ||
| return objectFactory.createCreator(value); | ||
| } | ||
| } | ||
| ); | ||
|
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| // read subject | ||
| reader.process(m, | ||
| Arrays.asList(new URI[]{java.net.URI.create(DCTERMS.SUBJECT.stringValue()), java.net.URI.create(DC.SUBJECT.stringValue())}), | ||
| new DCCreator() { | ||
| public JAXBElement<SimpleLiteral> createDc(SimpleLiteral value) { | ||
| return objectFactory.createSubject(value); | ||
| } | ||
| } | ||
| ); | ||
| } | ||
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| return m; | ||
| } | ||
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| protected List<Resource> findConceptSchemes() throws SparqlPerformException { | ||
| final List<Resource> conceptSchemeList = new ArrayList<Resource>(); | ||
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| Perform.on(repository).select(new GetConceptSchemesHelper(null) { | ||
| @Override | ||
| protected void handleConceptScheme(Resource conceptScheme) | ||
| throws TupleQueryResultHandlerException { | ||
| conceptSchemeList.add(conceptScheme); | ||
| } | ||
| }); | ||
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| return conceptSchemeList; | ||
| } | ||
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| protected List<Value> readProperties(URI subject, List<URI> uris, String lang) | ||
| throws SparqlPerformException { | ||
| PreferredPropertyReader reader = new PreferredPropertyReader( | ||
| this.repository, | ||
| uris, | ||
| Arrays.asList(new String[] { "" }), | ||
| lang | ||
| ); | ||
| List<Value> v = reader.getValues(subject); | ||
| return v; | ||
| } | ||
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| protected String formatDate(String date, String lang) { | ||
| try { | ||
| SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd"); | ||
| Date d = sdf.parse(date); | ||
| DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, new Locale(lang)); | ||
| String dateString = df.format(d); | ||
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| return dateString; | ||
| } catch (ParseException e) { | ||
| // return the original date by default | ||
| log.error(e.getMessage()); | ||
| return date; | ||
| } | ||
| } | ||
|
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| interface DCCreator { | ||
| public JAXBElement<SimpleLiteral> createDc(SimpleLiteral value); | ||
| } | ||
|
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| protected JAXBElement<SimpleLiteral> createSimpleLiteralValue(String value, String lang, DCCreator dcCreator) { | ||
| SimpleLiteral literal = new SimpleLiteral(); | ||
| literal.getContent().add(value); | ||
| literal.setLang(lang); | ||
| return dcCreator.createDc(literal); | ||
| } | ||
|
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| class MetadataReader { | ||
| private URI conceptSchemeToUse; | ||
| private String lang; | ||
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| public MetadataReader(URI conceptSchemeToUse, String lang) { | ||
| super(); | ||
| this.conceptSchemeToUse = conceptSchemeToUse; | ||
| this.lang = lang; | ||
| } | ||
|
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| public void process(ElementContainer container, List<URI> properties, DCCreator dcCreator) | ||
| throws SparqlPerformException { | ||
| List<Value> values = readProperties( | ||
| conceptSchemeToUse, | ||
| properties, | ||
| lang | ||
| ); | ||
| if(values != null) { | ||
| container.getAny().add(createSimpleLiteralValue(LabelReader.display(values), null, dcCreator)); | ||
| // for (Value aValue : values) { | ||
| // String theLang = (aValue instanceof Literal)?((Literal)aValue).getLanguage():lang; | ||
| // String theValue = (aValue instanceof Literal)?((Literal)aValue).getLabel():aValue.stringValue(); | ||
| // container.getAny().add(createSimpleLiteralValue(theValue, theLang, dcCreator)); | ||
| // } | ||
| } | ||
| } | ||
| } | ||
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| } |
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