/*
* 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.resultset;
import org.apache.jena.query.QuerySolution;
import org.apache.jena.query.ResultSet;
import org.apache.jena.rdf.model.RDFNode;
/** A class to walk a result set. */
public class ResultSetApply {
ResultSetProcessor proc = null;
ResultSet rs = null;
public ResultSetApply(ResultSet rs, ResultSetProcessor proc) {
this.proc = proc;
this.rs = rs;
}
public void apply() {
proc.start(rs);
for ( ; rs.hasNext() ; ) {
QuerySolution qs = rs.next();
proc.start(qs);
for ( String varName : rs.getResultVars() ) {
RDFNode node = qs.get(varName);
// node may be null
proc.binding(varName, node);
}
proc.finish(qs);
}
proc.finish(rs);
}
public static void apply(ResultSet rs, ResultSetProcessor proc) {
ResultSetApply rsa = new ResultSetApply(rs, proc);
rsa.apply();
}
}