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Modules for processing bibliographic data
/*
* Copyright 2013, 2014 Deutsche Nationalbibliothek
*
* 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.marc21;
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;
/**
* A marc xml reader.
* @author Markus Michael Geipel
*
*/
@Description("A marc xml reader")
@In(XmlReceiver.class)
@Out(StreamReceiver.class)
@FluxCommand("handle-marcxml")
public final class MarcXmlHandler extends DefaultXmlPipe {
private static final String SUBFIELD = "subfield";
private static final String DATAFIELD = "datafield";
private static final String CONTROLFIELD = "controlfield";
private static final String RECORD = "record";
private static final String NAMESPACE = "http://www.loc.gov/MARC21/slim";
private static final String LEADER = "leader";
private static final String TYPE = "type";
private String currentTag = "";
private StringBuilder builder = new StringBuilder();
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes)
throws SAXException {
if(SUBFIELD.equals(localName)){
builder = new StringBuilder();
currentTag = attributes.getValue("code");
}else if(DATAFIELD.equals(localName)){
getReceiver().startEntity(attributes.getValue("tag") + attributes.getValue("ind1") + attributes.getValue("ind2"));
}else if(CONTROLFIELD.equals(localName)){
builder = new StringBuilder();
currentTag = attributes.getValue("tag");
}else if(RECORD.equals(localName) && NAMESPACE.equals(uri)){
getReceiver().startRecord("");
getReceiver().literal(TYPE, attributes.getValue(TYPE));
}else if(LEADER.equals(localName)){
builder = new StringBuilder();
currentTag = LEADER;
}
}
@Override
public void endElement(final String uri, final String localName, final String qName) throws SAXException {
if(SUBFIELD.equals(localName)){
getReceiver().literal(currentTag, builder.toString().trim());
}else if(DATAFIELD.equals(localName)){
getReceiver().endEntity();
}else if(CONTROLFIELD.equals(localName)){
getReceiver().literal(currentTag, builder.toString().trim());
}else if(RECORD.equals(localName) && NAMESPACE.equals(uri)){
getReceiver().endRecord();
}else if(LEADER.equals(localName)){
getReceiver().literal(currentTag, builder.toString());
}
}
@Override
public void characters(final char[] chars, final int start, final int length) throws SAXException {
builder.append(chars, start, length);
}
}