org.xbib.marc.dialects.mab.xml.MabXMLContentHandler Maven / Gradle / Ivy
/*
Copyright 2016 Jörg Prante
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.xbib.marc.dialects.mab.xml;
import org.xbib.marc.MarcField;
import org.xbib.marc.label.RecordLabel;
import org.xbib.marc.xml.MarcContentHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* The Sax-ContentHandler-based MAB XML handler can handle SaX event input
* and fires events to a MarcXchange listener.
*/
public class MabXMLContentHandler extends MarcContentHandler implements MabXMLConstants {
private Set validNamespaces = new HashSet<>(Collections.singletonList(MABXML_NAMESPACE));
public MabXMLContentHandler() {
setTrim(true);
}
@Override
protected String getDefaultFormat() {
return "MabXML";
}
@Override
protected String getDefaultType() {
return "h";
}
@Override
public MabXMLContentHandler addNamespace(String uri) {
this.validNamespaces.add(uri);
return this;
}
@Override
public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
content.setLength(0);
if (!isNamespace(uri)) {
return;
}
switch (localName) {
case DATEI: {
beginCollection();
break;
}
case DATENSATZ: {
String type = null;
for (int i = 0; i < atts.getLength(); i++) {
if (TYP.equals(atts.getLocalName(i))) {
type = atts.getValue(i);
}
}
if (type == null) {
type = this.type;
}
beginRecord(format, type);
// create leader
RecordLabel recordLabel = RecordLabel.builder().setIndicatorLength(1).setSubfieldIdentifierLength(0)
.build();
leader(recordLabel.toString());
break;
}
case FELD: {
String tag = null;
StringBuilder sb = new StringBuilder();
sb.setLength(atts.getLength());
for (int i = 0; i < atts.getLength(); i++) {
String name = atts.getLocalName(i);
if (NR.equals(name)) {
tag = atts.getValue(i);
}
if (name.startsWith(IND_ATTRIBUTE)) {
// 'ind', one char for one indicator
sb.setCharAt(0, atts.getValue(i).charAt(0));
sb.setLength(1);
}
}
MarcField.Builder builder = MarcField.builder().tag(tag);
builder.indicator(sb.toString());
stack.push(builder);
break;
}
case UF: {
stack.peek().subfield(atts.getValue(CODE_ATTRIBUTE), null);
break;
}
default:
break;
}
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if (!isNamespace(uri)) {
return;
}
switch (localName) {
case DATEI: {
endCollection();
break;
}
case DATENSATZ: {
endRecord();
break;
}
case FELD: {
String s = content.toString();
MarcField marcField = stack.pop().value(trim ? s.trim() : s).build();
if (marcValueTransformers != null) {
marcField = marcValueTransformers.transformValue(marcField);
}
field(marcField);
break;
}
case UF: {
String s = content.toString();
stack.peek().subfieldValue(trim ? s.trim() : s);
break;
}
default:
break;
}
content.setLength(0);
}
@Override
protected boolean isNamespace(String uri) {
return validNamespaces.contains(uri);
}
}