/*
* 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.syntax.syntaxtransform;
import org.apache.jena.sparql.ARQInternalErrorException ;
import org.apache.jena.sparql.algebra.Op ;
import org.apache.jena.sparql.expr.* ;
import org.apache.jena.sparql.syntax.Element ;
/**
* A copying transform that applies an ElementTransform syntax pattern of
* E_Exist and E_NoExists
* */
public class ExprTransformApplyElementTransform extends ExprTransformCopy
{
private final ElementTransform transform ;
public ExprTransformApplyElementTransform(ElementTransform transform) {
this.transform = transform ;
}
@Override
public Expr transform(ExprFunctionOp funcOp, ExprList args, Op opArg)
{
Element el2 = ElementTransformer.transform(funcOp.getElement(), transform) ;
if ( el2 == funcOp.getElement() )
return super.transform(funcOp, args, opArg) ;
if ( funcOp instanceof E_Exists )
return new E_Exists(el2) ;
if ( funcOp instanceof E_NotExists )
return new E_NotExists(el2) ;
throw new ARQInternalErrorException("Unrecognized ExprFunctionOp: \n"+funcOp) ;
}
}