/*
* 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.expr;
import org.apache.jena.sparql.algebra.walker.Walker ;
public class ExprTransformer
{
/** Transform an expression */
public static Expr transform(ExprTransform transform, Expr expr)
{ return Walker.transform(expr, transform) ;}
/** Transform an expression list */
public static ExprList transform(ExprTransform transform, ExprList exprList) {
ExprList exprList2 = new ExprList() ;
boolean changed = false ;
for ( Expr e : exprList ) {
Expr e2 = transform(transform, e) ;
exprList2.add(e2) ;
if ( e != e2 )
changed = true ;
} ;
if ( changed )
return exprList2 ;
else
return exprList ;
}
}