/*
* 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.arq.querybuilder.rewriters;
import java.util.Map;
import org.apache.jena.graph.Node ;
import org.apache.jena.sparql.core.Var ;
import org.apache.jena.sparql.path.* ;
/**
* A rewriter that implements PathVisitor.
*
*/
public class PathRewriter extends AbstractRewriter<Path> implements PathVisitor {
/**
* Constructor.
* @param values The values to replace.
*/
public PathRewriter(Map<Var, Node> values) {
super(values);
}
@Override
public void visit(P_Link pathNode) {
push(new P_Link(changeNode(pathNode.getNode())));
}
@Override
public void visit(P_ReverseLink pathNode) {
push(new P_ReverseLink(changeNode(pathNode.getNode())));
}
/*
* Reverse transformations. X !(^:uri1|...|^:urin)Y ==> ^(X
* !(:uri1|...|:urin) Y) Split into forward and reverse. X
* !(:uri1|...|:urii|^:urii+1|...|^:urim) Y ==> { X !(:uri1|...|:urii|)Y }
* UNION { X !(^:urii+1|...|^:urim) Y }
*/
@Override
public void visit(P_NegPropSet pathNotOneOf) {
P_NegPropSet retval = new P_NegPropSet();
for (Path p : pathNotOneOf.getNodes()) {
p.visit(this);
retval.add((P_Path0) pop());
}
push(retval);
}
@Override
public void visit(P_Inverse inversePath) {
inversePath.getSubPath().visit(this);
push(new P_Inverse(pop()));
}
@Override
public void visit(P_Mod pathMod) {
pathMod.getSubPath().visit(this);
push(new P_Mod(pop(), pathMod.getMin(), pathMod.getMax()));
}
@Override
public void visit(P_FixedLength pFixedLength) {
pFixedLength.getSubPath().visit(this);
push(new P_FixedLength(pop(), pFixedLength.getCount()));
}
@Override
public void visit(P_Alt pathAlt) {
pathAlt.getRight().visit(this);
pathAlt.getLeft().visit(this);
push(new P_Alt(pop(), pop()));
}
@Override
public void visit(P_Seq pathSeq) {
pathSeq.getRight().visit(this);
pathSeq.getLeft().visit(this);
push(new P_Seq(pop(), pop()));
}
@Override
public void visit(P_Distinct pathDistinct) {
pathDistinct.getSubPath().visit(this);
push(new P_Distinct(pop()));
}
@Override
public void visit(P_Multi pathMulti) {
pathMulti.getSubPath().visit(this);
push(new P_Multi(pop()));
}
@Override
public void visit(P_Shortest pathShortest) {
pathShortest.getSubPath().visit(this);
push(new P_Shortest(pop()));
}
@Override
public void visit(P_ZeroOrOne path) {
path.getSubPath().visit(this);
push(new P_ZeroOrOne(pop()));
}
@Override
public void visit(P_ZeroOrMore1 path) {
path.getSubPath().visit(this);
push(new P_ZeroOrMore1(pop()));
}
@Override
public void visit(P_ZeroOrMoreN path) {
path.getSubPath().visit(this);
push(new P_ZeroOrMoreN(pop()));
}
@Override
public void visit(P_OneOrMore1 path) {
path.getSubPath().visit(this);
push(new P_OneOrMore1(pop()));
}
@Override
public void visit(P_OneOrMoreN path) {
path.getSubPath().visit(this);
push(new P_OneOrMoreN(pop()));
}
}