/*
* 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.engine.iterator;
import org.apache.jena.sparql.engine.ExecutionContext ;
import org.apache.jena.sparql.engine.QueryIterator ;
import org.apache.jena.sparql.engine.binding.Binding ;
import org.apache.jena.util.iterator.NiceIterator ;
/** Track a QueryIterator */
public class QueryIterTracked extends QueryIter
{
QueryIterator iterator = null ;
/** Use QueryIter.makeTracked */
QueryIterTracked(QueryIterator iter, ExecutionContext execCxt)
{
super(execCxt) ;
iterator = iter ;
}
@Override
protected boolean hasNextBinding() { return iterator.hasNext() ; }
@Override
protected Binding moveToNextBinding() { return iterator.next() ; }
@Override
protected void closeIterator()
{
if ( iterator != null )
{
NiceIterator.close(iterator) ;
iterator = null ;
}
}
@Override
protected void requestCancel()
{
if ( iterator != null )
{
iterator.cancel();
}
}
}