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IO support classes for JUNG
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/*
* Copyright (c) 2008, The JUNG Authors
*
* All rights reserved.
*
* This software is open-source under the BSD license; see either
* "license.txt" or
* https://github.com/jrtom/jung/blob/master/LICENSE for a description.
*/
package edu.uci.ics.jung.io.graphml.parser;
import java.util.Iterator;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
import edu.uci.ics.jung.graph.Hypergraph;
import edu.uci.ics.jung.io.GraphIOException;
import edu.uci.ics.jung.io.graphml.*;
/**
* Parses hyper edge elements.
*
* @author Nathan Mittler - [email protected]
*/
public class HyperEdgeElementParser,V,E> extends AbstractElementParser {
public HyperEdgeElementParser(ParserContext parserContext) {
super(parserContext);
}
public HyperEdgeMetadata parse(XMLEventReader xmlEventReader, StartElement start)
throws GraphIOException {
try {
// Create the new edge.
HyperEdgeMetadata edge = new HyperEdgeMetadata();
// Parse the attributes.
@SuppressWarnings("unchecked")
Iterator iterator = start.getAttributes();
while (iterator.hasNext()) {
Attribute attribute = (Attribute) iterator.next();
String name = attribute.getName().getLocalPart();
String value = attribute.getValue();
if (edge.getId() == null && GraphMLConstants.ID_NAME.equals(name)) {
edge.setId(value);
} else {
edge.setProperty(name, value);
}
}
while (xmlEventReader.hasNext()) {
XMLEvent event = xmlEventReader.nextEvent();
if (event.isStartElement()) {
StartElement element = (StartElement) event;
String name = element.getName().getLocalPart();
if(GraphMLConstants.DESC_NAME.equals(name)) {
String desc = (String)getParser(name).parse(xmlEventReader, element);
edge.setDescription(desc);
} else if(GraphMLConstants.DATA_NAME.equals(name)) {
DataMetadata data = (DataMetadata)getParser(name).parse(xmlEventReader, element);
edge.addData(data);
} else if(GraphMLConstants.ENDPOINT_NAME.equals(name)) {
EndpointMetadata ep = (EndpointMetadata)getParser(name).parse(xmlEventReader, element);
edge.addEndpoint(ep);
} else {
// Treat anything else as unknown
getUnknownParser().parse(xmlEventReader, element);
}
}
if (event.isEndElement()) {
EndElement end = (EndElement) event;
verifyMatch(start, end);
break;
}
}
// Apply the keys to this object.
applyKeys(edge);
return edge;
} catch (Exception e) {
ExceptionConverter.convert(e);
}
return null;
}
}
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