de.tudarmstadt.ukp.integration.alignment.xml.AlignmentXmlWriter.java Source code

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Here is the source code for de.tudarmstadt.ukp.integration.alignment.xml.AlignmentXmlWriter.java

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/*******************************************************************************
 * Copyright 2016
 * Ubiquitous Knowledge Processing (UKP) Lab
 * Technische Universitt Darmstadt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package de.tudarmstadt.ukp.integration.alignment.xml;

import static org.apache.commons.io.IOUtils.closeQuietly;

import java.io.Closeable;
import java.io.IOException;
import java.io.OutputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventFactory;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;

import de.tudarmstadt.ukp.integration.alignment.xml.model.Alignments;
import de.tudarmstadt.ukp.integration.alignment.xml.model.XmlMeta;

/**
 * 
 * Writer for alignment xml format
 *
 */
public class AlignmentXmlWriter implements Closeable {

    private static final String RESOURCE_ALIGNMENT = "resourceAlignment";

    XMLEventWriter xmlEventWriter;
    XMLEventFactory xmlef;
    OutputStream out;
    Marshaller marshaller;

    public AlignmentXmlWriter(OutputStream out) throws IOException {

        try {
            XMLOutputFactory xmlOutputFactory = XMLOutputFactory.newInstance();
            xmlEventWriter = xmlOutputFactory.createXMLEventWriter(out);

            JAXBContext context = JAXBContext.newInstance(XmlMeta.class, Alignments.class); //Source.class

            marshaller = context.createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE); // no document level events
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);

            xmlef = XMLEventFactory.newInstance();
            xmlEventWriter.add(xmlef.createStartDocument());
            xmlEventWriter.add(xmlef.createStartElement("", "", RESOURCE_ALIGNMENT));

        } catch (XMLStreamException e) {
            throw new IOException(e);
        } catch (JAXBException e) {
            throw new IOException(e);
        }

    }

    public void writeMetaData(XmlMeta meta) throws IOException {
        try {
            marshaller.marshal(new JAXBElement<XmlMeta>(new QName("metadata"), XmlMeta.class, meta),
                    xmlEventWriter);
        } catch (JAXBException e) {
            throw new IOException(e);
        }

    }

    public void writeAlignments(Alignments alignments) throws IOException {
        try {
            marshaller.marshal(new JAXBElement<Alignments>(new QName("alignments"), Alignments.class, alignments),
                    xmlEventWriter);
        } catch (JAXBException e) {
            throw new IOException(e);
        }

    }

    //   public void write(List<Source> sources) throws IOException, XMLStreamException {
    //      for (Source source:sources){
    //         write(source);
    //      }
    //   }
    //   
    //   private void write(Source source) throws IOException, XMLStreamException {
    //        try {
    //         marshaller.marshal(new JAXBElement<Source>(new QName("source"),
    //                 Source.class, source), xmlEventWriter);
    //      } catch (JAXBException e) {
    //         throw new IOException(e);
    //      }
    //   }

    @Override
    public void close() throws IOException {
        try {
            xmlEventWriter.add(xmlef.createEndElement("", "", RESOURCE_ALIGNMENT));
            xmlEventWriter.add(xmlef.createEndDocument());
        } catch (XMLStreamException e) {
            throw new IOException(e);
        } finally {
            closeQuietly(out);
        }
    }

}