/*
* 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.Iterator ;
import java.util.List ;
import org.apache.jena.atlas.io.IndentedLineBuffer ;
import com.hp.hpl.jena.graph.Triple ;
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 triples.
* Reduces the use of bland "List" in APIs (Java 1.4)
*/
public class BasicPattern implements Iterable<Triple>
{
private List<Triple> triples ;
public BasicPattern() { this(new ArrayList<Triple>()) ; }
public BasicPattern(BasicPattern other)
{
this() ;
// Copy.
triples.addAll(other.triples) ;
}
private BasicPattern(List<Triple> triples) { this.triples = triples ; }
/** Wrap a list of triples up as a BasicPattern. Chnaging the list, changes the BasicPattern */
public static BasicPattern wrap(List<Triple> triples)
{
return new BasicPattern(triples) ;
}
public void add(Triple t) { triples.add(t) ; }
public void addAll(BasicPattern other) { triples.addAll(other.triples) ; }
public void add(int i, Triple t) { triples.add(i, t) ; }
public Triple get(int i) { return triples.get(i) ; }
@Override
public Iterator<Triple> iterator() { return triples.listIterator() ; }
public int size() { return triples.size() ; }
public boolean isEmpty() { return triples.isEmpty() ; }
public List<Triple> getList() { return triples ; }
@Override
public int hashCode() { return triples.hashCode() ; }
@Override
public boolean equals(Object other)
{
if ( this == other ) return true ;
if ( ! ( other instanceof BasicPattern) )
return false ;
BasicPattern bp = (BasicPattern)other ;
return triples.equals(bp.triples) ;
}
public boolean equiv(BasicPattern other, NodeIsomorphismMap isoMap)
{
if ( this.triples.size() != other.triples.size() )
return false ;
for ( int i = 0 ; i < this.triples.size() ; i++ )
{
Triple t1 = get(i) ;
Triple t2 = other.get(i) ;
if ( ! Iso.tripleIso(t1, t2, isoMap) )
return false ;
}
return true ;
}
@Override
public String toString()
{
IndentedLineBuffer out = new IndentedLineBuffer() ;
SerializationContext sCxt = SSE.sCxt(SSE.defaultPrefixMapWrite) ;
boolean first = true ;
for ( Triple t : triples )
{
if ( !first )
out.print("\n") ;
else
first = false ;
// Adds (triple ...)
// SSE.write(buff.getIndentedWriter(), t) ;
out.print("(") ;
WriterNode.outputPlain(out, t, sCxt) ;
out.print(")") ;
}
out.flush();
return out.toString() ;
}
}