org.metafacture.biblio.AlephMabXmlHandler Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of metafacture-biblio Show documentation
Modules for processing bibliographic data
There is a newer version: 6.1.2
/** Copyright 2013,2014 hbz
 *
 *  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 org.metafacture.biblio;

import org.metafacture.framework.FluxCommand;
import org.metafacture.framework.StreamReceiver;
import org.metafacture.framework.XmlReceiver;
import org.metafacture.framework.annotations.Description;
import org.metafacture.framework.annotations.In;
import org.metafacture.framework.annotations.Out;
import org.metafacture.framework.helpers.DefaultXmlPipe;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

/**
 * An Aleph-MAB-XML reader.
 *
 * @author Pascal Christoph (dr0i)
 *
 */
@Description("A MAB XML reader")
@In(XmlReceiver.class)
@Out(StreamReceiver.class)
@FluxCommand("handle-mabxml")
public final class AlephMabXmlHandler extends DefaultXmlPipe {

    private static final String SUBFIELD = "subfield";
    private static final String DATAFIELD = "datafield";
    private static final String CONTROLLFIELD = "controlfield";
    private static final String RECORD = "ListRecords";
    private static final String LEADER = "leader";
    private static final String DATAFIELD_ATTRIBUTE = "tag";
    private static final String SUBFIELD_ATTRIBUTE = "code";
    private static final String INDICATOR1 = "ind1";
    private static final String INDICATOR2 = "ind2";
    private String currentTag = "";
    private StringBuilder builder = new StringBuilder();

    @Override
    public void characters(final char[] chars, final int start, final int length)
            throws SAXException {
        this.builder.append(chars, start, length);
    }

    @Override
    public void endElement(final String uri, final String localName, final String qName)
            throws SAXException {
        if (AlephMabXmlHandler.CONTROLLFIELD.equals(localName)) {
            getReceiver().literal(this.currentTag, this.builder.toString().trim());
            getReceiver().endEntity();
        } else if (AlephMabXmlHandler.SUBFIELD.equals(localName)) {
            getReceiver().literal(this.currentTag, this.builder.toString().trim());
        } else if (AlephMabXmlHandler.DATAFIELD.equals(localName)) {
            getReceiver().endEntity();
        } else if (AlephMabXmlHandler.RECORD.equals(localName)) {
            getReceiver().endRecord();
        }
    }

    @Override
    public void startElement(final String uri, final String localName, final String qName,
            final Attributes attributes) throws SAXException {
        if (AlephMabXmlHandler.CONTROLLFIELD.equals(localName)) {
            this.builder = new StringBuilder();
            this.currentTag = "";
            getReceiver().startEntity(attributes.getValue(AlephMabXmlHandler.DATAFIELD_ATTRIBUTE));
        } else if (AlephMabXmlHandler.SUBFIELD.equals(localName)) {
            this.builder = new StringBuilder();
            this.currentTag = attributes.getValue(AlephMabXmlHandler.SUBFIELD_ATTRIBUTE);
        } else if (AlephMabXmlHandler.DATAFIELD.equals(localName)) {
            getReceiver().startEntity(attributes.getValue(AlephMabXmlHandler.DATAFIELD_ATTRIBUTE)
                    + attributes.getValue(AlephMabXmlHandler.INDICATOR1)
                    + attributes.getValue(AlephMabXmlHandler.INDICATOR2));
        } else if (AlephMabXmlHandler.RECORD.equals(localName)) {
            getReceiver().startRecord("");
        } else if (AlephMabXmlHandler.LEADER.equals(localName)) {
            this.builder = new StringBuilder();
            this.currentTag = AlephMabXmlHandler.LEADER;
        }
    }

}