| /* |
| * 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 java.util.List ; |
| |
| import org.apache.jena.graph.Node ; |
| 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.pfunction.PropFuncArg ; |
| import org.apache.jena.sparql.sse.Tags ; |
| import org.apache.jena.sparql.util.Iso ; |
| import org.apache.jena.sparql.util.NodeIsomorphismMap ; |
| |
| /** Property functions (or any OpBGP replacement) |
| * Execution will be per-engine specific */ |
| public class OpPropFunc extends Op1 |
| { |
| // c.f. OpProcedure which is similar except for the handling of arguments. |
| // Safer to have two (Ops are mainly abstract syntax, not executional). |
| private Node uri ; |
| private PropFuncArg subjectArgs ; |
| private PropFuncArg objectArgs ; |
| |
| public OpPropFunc(Node uri, PropFuncArg args1 , PropFuncArg args2, Op op) |
| { |
| super(op) ; |
| this.uri = uri ; |
| this.subjectArgs = args1 ; |
| this.objectArgs = args2 ; |
| } |
| |
| public PropFuncArg getSubjectArgs() { |
| return subjectArgs ; |
| } |
| |
| public PropFuncArg getObjectArgs() { |
| return objectArgs ; |
| } |
| |
| @Override |
| public Op apply(Transform transform, Op subOp) { |
| return transform.transform(this, subOp) ; |
| } |
| |
| @Override |
| public void visit(OpVisitor opVisitor) |
| { opVisitor.visit(this) ; } |
| |
| public Node getProperty() { return uri ; } |
| |
| @Override |
| public String getName() { |
| return Tags.tagPropFunc ; |
| } |
| |
| @Override |
| public Op1 copy(Op op) { |
| return new OpPropFunc(uri, subjectArgs, objectArgs, op) ; |
| } |
| |
| @Override |
| public int hashCode() { |
| return uri.hashCode() ^ getSubOp().hashCode() ; |
| } |
| |
| @Override |
| public boolean equalTo(Op other, NodeIsomorphismMap labelMap) { |
| if ( ! ( other instanceof OpPropFunc ) ) |
| return false ; |
| OpPropFunc procFunc = (OpPropFunc)other ; |
| if ( ! this.getProperty().equals(procFunc.getProperty()) ) |
| return false ; |
| |
| PropFuncArg s1 = getSubjectArgs() ; |
| PropFuncArg s2 = procFunc.getSubjectArgs() ; |
| s1.equals(s2) ; |
| |
| if ( ! isomorphic(getSubjectArgs(), procFunc.getSubjectArgs(), labelMap) ) |
| return false ; |
| if ( ! isomorphic(getObjectArgs(), procFunc.getObjectArgs(), labelMap) ) |
| return false ; |
| return getSubOp().equalTo(procFunc.getSubOp(), labelMap) ; |
| } |
| |
| private static boolean isomorphic(PropFuncArg pfa1, PropFuncArg pfa2, NodeIsomorphismMap labelMap) { |
| if ( pfa1 == null && pfa2 == null ) |
| return true ; |
| if ( pfa1 == null ) return false ; |
| if ( pfa2 == null ) return false ; |
| |
| if ( pfa1.isList() && pfa2.isList() ) { |
| List<Node> list1 = pfa1.getArgList() ; |
| List<Node> list2 = pfa2.getArgList() ; |
| return Iso.isomorphicNodes(list1, list2, labelMap) ; |
| } |
| if ( pfa1.isNode() && pfa2.isNode() ) |
| return Iso.nodeIso(pfa1.getArg(), pfa2.getArg(), labelMap) ; |
| return false ; |
| } |
| } |