/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 com.hp.hpl.jena.rdf.arp.states;
import org.xml.sax.Attributes;
import org.xml.sax.SAXParseException;
import com.hp.hpl.jena.rdf.arp.impl.ANode;
import com.hp.hpl.jena.rdf.arp.impl.ARPResource;
import com.hp.hpl.jena.rdf.arp.impl.AbsXMLContext;
abstract class Collection extends WantDescription {
// TODO: not for 2.3. document this carefully.
WantsObjectI nextSlot;
public Collection(WantsObjectFrameI s, AbsXMLContext x) {
super(s, x);
nextSlot = s;
}
ANode bnode;
@Override
public FrameI startElement(String uri, String localName, String rawName,
Attributes atts) throws SAXParseException {
FrameI fi = super.startElement(uri,localName,rawName,atts);
ANode prevNode = bnode;
bnode = new ARPResource(arp);
try {
nextSlot.theObject(bnode);
}
finally {
if (prevNode != null)
arp.endLocalScope(prevNode);
}
firstTriple(bnode,subject);
final ANode thisNode = bnode;
nextSlot = new WantsObjectI() {
@Override
public void theObject(ANode a) {
restTriple(thisNode,a);
}
};
return fi;
}
/** Must use second bnode in the first triple.
Can use either bnode in further triples.
*/
abstract void restTriple(ANode subj,ANode obj);
/** Must use both bnodes in the first triple.
Can use either bnode in further triples.
*/
abstract void firstTriple(ANode subj, ANode obj);
abstract ANode nil() ;
@Override
final public void endElement() throws SAXParseException {
nextSlot.theObject(nil());
if (bnode != null) {
arp.endLocalScope(bnode);
bnode = null;
}
super.endElement();
}
@Override
public void abort() {
if (bnode != null) {
arp.endLocalScope(bnode);
bnode = null;
}
super.abort();
}
}