/*
 * 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 com.hp.hpl.jena.sparql.expr;

import com.hp.hpl.jena.sparql.algebra.Op ;

public class ExprTransformBase
{
    public Expr transform(ExprFunction1 func, Expr expr1)                           { return func ; }
    public Expr transform(ExprFunction2 func, Expr expr1, Expr expr2)               { return func ; }
    public Expr transform(ExprFunction3 func, Expr expr1, Expr expr2, Expr expr3)   { return func ; }
    public Expr transform(ExprFunctionN func, ExprList args)                        { return func ; }
    public Expr transform(ExprFunctionOp funcOp, ExprList args, Op opArg)           { return funcOp ; }
    public Expr transform(NodeValue nv)                                             { return nv ; }
    public Expr transform(ExprVar ev)                                               { return ev ; }
}

@@ -916,14 +916,161 @@
 Base
-%0A%7B%0A   
+ implements ExprTransform%0A%7B%0A    @Override public Expr transform(ExprFunction0 func)                                       %7B return func ; %7D%0A    @Override
  pub
@@ -1160,32 +1160,42 @@
 rn func ; %7D%0A    
+@Override 
 public Expr tran
@@ -1272,32 +1272,42 @@
 rn func ; %7D%0A    
+@Override 
 public Expr tran
@@ -1384,32 +1384,42 @@
 rn func ; %7D%0A    
+@Override 
 public Expr tran
@@ -1496,32 +1496,42 @@
 rn func ; %7D%0A    
+@Override 
 public Expr tran
@@ -1610,32 +1610,42 @@
  funcOp ; %7D%0A    
+@Override 
 public Expr tran
@@ -1728,16 +1728,26 @@
 ; %7D%0A    
+@Override 
 public E
@@ -1834,10 +1834,122 @@
  ev ; %7D%0A
+    @Override public Expr transform(ExprAggregator eAgg)                                      %7B return eAgg ; %7D%0A
 %7D%0A

Make ExprTransformBase implement ExprTransform (JENA-274).