/*
* 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.core;
import java.util.ArrayList ;
import java.util.List ;
import java.util.ListIterator ;
import org.apache.jena.atlas.io.IndentedLineBuffer ;
import com.hp.hpl.jena.sparql.serializer.SerializationContext ;
import com.hp.hpl.jena.sparql.sse.SSE ;
import com.hp.hpl.jena.sparql.sse.writers.WriterNode ;
import com.hp.hpl.jena.sparql.util.Iso ;
import com.hp.hpl.jena.sparql.util.NodeIsomorphismMap ;
/** A class whose purpose is to give a name to a collection of quads
*/
public class QuadPattern implements Iterable<Quad>
{
private List<Quad> quads = new ArrayList<Quad>() ;
public QuadPattern() {}
public QuadPattern(QuadPattern other) {quads.addAll(other.quads) ; }
public void add(Quad q) { quads.add(q) ; }
public void addAll(QuadPattern other) { quads.addAll(other.quads) ; }
public void add(int i, Quad q) { quads.add(i, q) ; }
public Quad get(int i) { return quads.get(i) ; }
@Override
public ListIterator<Quad> iterator() { return quads.listIterator() ; }
public int size() { return quads.size() ; }
public boolean isEmpty() { return quads.isEmpty() ; }
public List<Quad> getList() { return quads ; }
@Override
public int hashCode() { return quads.hashCode() ; }
@Override
public boolean equals(Object other) {
if ( this == other )
return true ;
if ( !(other instanceof QuadPattern) )
return false ;
QuadPattern bp = (QuadPattern)other ;
return quads.equals(bp.quads) ;
}
public boolean equiv(QuadPattern other, NodeIsomorphismMap isoMap) {
if ( this.quads.size() != other.quads.size() )
return false ;
for (int i = 0; i < this.quads.size(); i++) {
Quad q1 = get(i) ;
Quad q2 = other.get(i) ;
if ( !Iso.quadIso(q1, q2, isoMap) )
return false ;
}
return true ;
}
@Override
public String toString() {
IndentedLineBuffer out = new IndentedLineBuffer() ;
SerializationContext sCxt = SSE.sCxt((SSE.defaultPrefixMapWrite)) ;
boolean first = true ;
for (Quad quad : quads) {
if ( !first )
out.print(" ") ;
else
first = false ;
// Adds (triple ...)
// SSE.write(buff.getIndentedWriter(), t) ;
out.print("(") ;
WriterNode.outputPlain(out, quad, sCxt) ;
out.print(")") ;
}
out.flush() ;
return out.toString() ;
}
}