| /* |
| * 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 org.apache.jena.sparql.algebra.op; |
| |
| import org.apache.jena.sparql.algebra.Op ; |
| import org.apache.jena.sparql.algebra.OpVisitor ; |
| import org.apache.jena.sparql.algebra.Transform ; |
| import org.apache.jena.sparql.core.BasicPattern ; |
| import org.apache.jena.sparql.core.Quad ; |
| import org.apache.jena.sparql.core.QuadPattern ; |
| import org.apache.jena.sparql.sse.Tags ; |
| import org.apache.jena.sparql.util.Iso ; |
| import org.apache.jena.sparql.util.NodeIsomorphismMap ; |
| |
| /** Algebra operation for a single quad. |
| * @see OpTriple |
| */ |
| public class OpQuad extends Op0 |
| { |
| private final Quad quad ; |
| private OpQuadPattern opQuadPattern = null ; |
| |
| public OpQuad(Quad quad) |
| { |
| this.quad = quad ; |
| } |
| |
| public final Quad getQuad() { return quad ; } |
| |
| |
| public OpQuadPattern asQuadPattern() |
| { |
| if ( opQuadPattern == null ) |
| { |
| BasicPattern bp = new BasicPattern() ; |
| bp.add(getQuad().asTriple()) ; |
| opQuadPattern = new OpQuadPattern(quad.getGraph(),bp) ; |
| } |
| return opQuadPattern ; |
| } |
| |
| @Override |
| public Op apply(Transform transform) |
| { return transform.transform(this) ; } |
| |
| @Override |
| public Op0 copy() |
| { |
| return new OpQuad(quad) ; |
| } |
| |
| @Override |
| public boolean equalTo(Op other, NodeIsomorphismMap labelMap) |
| { |
| if ( ! (other instanceof OpQuad) ) |
| return false ; |
| OpQuad opQuad = (OpQuad)other ; |
| return Iso.quadIso(getQuad(), opQuad.getQuad(), labelMap) ; |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return OpBase.HashTriple ^ quad.hashCode() ; |
| } |
| |
| @Override |
| public void visit(OpVisitor opVisitor) |
| { opVisitor.visit(this) ; } |
| |
| @Override |
| public String getName() |
| { |
| return Tags.tagTriple ; |
| } |
| |
| public boolean equivalent(OpQuadPattern opQuads) |
| { |
| QuadPattern quads = opQuads.getPattern() ; |
| if ( quads.size() != 1 ) return false ; |
| Quad q = quads.get(0) ; |
| return quad.equals(q) ; |
| } |
| } |