/*
* 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.engine.iterator;
import org.apache.jena.atlas.io.IndentedWriter ;
import com.hp.hpl.jena.graph.Node ;
import com.hp.hpl.jena.sparql.core.Var ;
import com.hp.hpl.jena.sparql.engine.ExecutionContext ;
import com.hp.hpl.jena.sparql.engine.binding.Binding ;
import com.hp.hpl.jena.sparql.engine.binding.BindingFactory ;
import com.hp.hpl.jena.sparql.serializer.SerializationContext ;
/** A singleton iterator */
public class QueryIterSingleton extends QueryIterYieldN
{
// A common usage?
public static QueryIterSingleton create(Binding parent, Var var, Node value, ExecutionContext execCxt)
{
Binding b = BindingFactory.binding(parent, var, value) ;
return QueryIterSingleton.create(b, execCxt) ;
}
public static QueryIterSingleton create(Binding binding, ExecutionContext execCxt)
{
return new QueryIterSingleton(binding, execCxt) ;
}
private QueryIterSingleton(Binding binding) // Not needed
{
this(binding, null) ;
}
protected QueryIterSingleton(Binding binding, ExecutionContext context)
{
super(1, binding, context) ;
}
@Override
public void output(IndentedWriter out, SerializationContext sCxt)
{
out.print("QueryIterSingleton "+binding);
}
// @Override
// public void closeIterator() { super.closeIterator() ; }
}