/*
* 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.pfunction.library;
import java.util.List ;
import org.apache.jena.graph.Node ;
import org.apache.jena.sparql.ARQException ;
import org.apache.jena.sparql.core.Var ;
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.sparql.pfunction.PropFuncArg ;
import org.apache.jena.sparql.pfunction.PropFuncArgType ;
/** List operation - object can't be a list. */
public abstract class ListBase1 extends ListBase
{
public ListBase1()
{ super(PropFuncArgType.PF_ARG_SINGLE) ; }
@Override
final protected
QueryIterator execOneList(Binding binding,
Node listNode, Node predicate, PropFuncArg object,
ExecutionContext execCxt)
{
return execOneList(binding, listNode, predicate, object.getArg(), execCxt) ;
}
@Override
protected abstract QueryIterator execObjectBound(Binding binding,
Var listVar, Node predicate, Node object,
ExecutionContext execCxt) ;
@Override
protected QueryIterator execObjectList(Binding binding, Var listVar, Node predicate, List<Node> objectArgs,
ExecutionContext execCxt)
{
throw new ARQException("List operation: Object list passed to single object node predicate: "+predicate) ;
}
protected abstract QueryIterator execOneList(Binding binding,
Node listNode, Node predicate, Node object,
ExecutionContext execCxt);
}