com.github.anno4j.model.AgentSupport Maven / Gradle / Ivy

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Read and write API for W3C Web Annotation Data Model (http://www.w3.org/TR/annotation-model/) and W3C Open Annotation Data Model (http://www.openannotation.org/spec/core/)

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package com.github.anno4j.model;

import com.github.anno4j.annotations.Partial;
import com.github.anno4j.model.impl.ResourceObjectSupport;
import org.openrdf.repository.RepositoryException;
import org.openrdf.rio.*;

import java.io.ByteArrayOutputStream;

@Partial
public abstract class AgentSupport extends ResourceObjectSupport implements Agent {
    /**
     * Method returns a textual representation of the given Annotation, containing
     * its Body, Target and possible Selection, in a supported serialisation format.
     *
     * @param format The format which should be printed.
     * @return A textual representation if this object in the format.
     */
    @Override
    public String getTriples(RDFFormat format) {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        RDFParser parser = Rio.createParser(RDFFormat.NTRIPLES);
        RDFWriter writer = Rio.createWriter(format, out);
        parser.setRDFHandler(writer);

        try {
            this.getObjectConnection().exportStatements(this.getResource(), null, null, true, writer);

        } catch (RepositoryException | RDFHandlerException e) {
            e.printStackTrace();
        }

        return out.toString();
    }
}