/*
* 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.sparql.syntax;
import java.util.Iterator ;
import com.hp.hpl.jena.graph.Triple ;
import com.hp.hpl.jena.sparql.ARQException ;
import com.hp.hpl.jena.sparql.core.BasicPattern ;
import com.hp.hpl.jena.sparql.core.TriplePath ;
import com.hp.hpl.jena.sparql.util.NodeIsomorphismMap ;
/** The syntax eleemnt for a SPARQL BasicGraphPattern */
public class ElementTriplesBlock extends Element implements TripleCollectorMark
{
private final BasicPattern pattern ;
public ElementTriplesBlock()
{
pattern = new BasicPattern() ;
}
public ElementTriplesBlock(BasicPattern bgp)
{
pattern = bgp ;
}
public boolean isEmpty() { return pattern.isEmpty() ; }
@Override
public void addTriple(Triple t)
{ pattern.add(t) ; }
@Override
public int mark() { return pattern.size() ; }
@Override
public void addTriple(int index, Triple t)
{ pattern.add(index, t) ; }
@Override
public void addTriplePath(TriplePath path)
{ throw new ARQException("Triples-only collector") ; }
@Override
public void addTriplePath(int index, TriplePath path)
{ throw new ARQException("Triples-only collector") ; }
public BasicPattern getPattern() { return pattern ; }
public Iterator<Triple> patternElts() { return pattern.iterator(); }
@Override
public int hashCode()
{
int calcHashCode = Element.HashBasicGraphPattern ;
calcHashCode ^= pattern.hashCode() ;
return calcHashCode ;
}
@Override
public boolean equalTo(Element el2, NodeIsomorphismMap isoMap)
{
if ( ! ( el2 instanceof ElementTriplesBlock) )
return false ;
ElementTriplesBlock eg2 = (ElementTriplesBlock)el2 ;
return this.pattern.equiv(eg2.pattern, isoMap) ;
}
@Override
public void visit(ElementVisitor v) { v.visit(this) ; }
}