/*
* 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.query;
import java.io.InputStream ;
import java.util.ArrayList ;
import java.util.List ;
import com.hp.hpl.jena.rdf.model.Model ;
import com.hp.hpl.jena.rdf.model.ModelFactory ;
import com.hp.hpl.jena.sparql.core.Var ;
import com.hp.hpl.jena.sparql.engine.QueryIterator ;
import com.hp.hpl.jena.sparql.engine.ResultSetStream ;
import com.hp.hpl.jena.sparql.engine.binding.Binding ;
import com.hp.hpl.jena.sparql.engine.binding.BindingInputStream ;
import com.hp.hpl.jena.sparql.engine.iterator.QueryIterPlainWrapper ;
public class BIOInput
{
private static Model m = ModelFactory.createDefaultModel() ;
public static ResultSet fromBIO(InputStream input)
{
// Scan the stream for VARS and accumulate the total variables.
// Trade off of guessing first line is all the VARS and coping with
// anything possible. -> Cope with anything possible.
BindingInputStream bin = new BindingInputStream(input) ;
List<Binding> bindings = new ArrayList<Binding>() ;
List<Var> vars = new ArrayList<Var>() ;
while(bin.hasNext())
{
Binding b = bin.next();
bindings.add(b) ;
for ( Var v : bin.vars() )
{
if ( ! vars.contains(v) )
vars.add(v) ;
}
}
QueryIterator qIter = new QueryIterPlainWrapper(bindings.iterator()) ;
return new ResultSetStream(Var.varNames(vars), m, qIter) ;
}
}