| /** |
| * 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; |
| |
| import java.util.List ; |
| import java.util.function.Consumer; |
| |
| import org.apache.jena.query.QueryExecution ; |
| import org.apache.jena.query.QuerySolution ; |
| import org.apache.jena.query.ResultSet ; |
| import org.apache.jena.rdf.model.Model ; |
| import org.apache.jena.sparql.ARQException ; |
| import org.apache.jena.sparql.engine.binding.Binding ; |
| |
| /** ResultSet wrapper that check whether some condition is true |
| * (e.g. the QueryExecution has not been closed). |
| * @deprecated To be removed. |
| */ |
| @Deprecated(forRemoval = true) |
| public class ResultSetCheckCondition implements ResultSet |
| { |
| interface Condition { boolean check() ; } |
| private final ResultSet other ; |
| private final Condition condition ; |
| |
| public ResultSetCheckCondition(ResultSet other, QueryExecution qExec) { |
| this(other, checkQExec(qExec) ) ; |
| } |
| |
| public ResultSetCheckCondition(ResultSet other, Condition condition) { |
| this.other = other ; |
| this.condition = condition ; |
| } |
| |
| private static Condition checkQExec(final QueryExecution qExec) { |
| return ()-> ! qExec.isClosed() ; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| check() ; |
| return other.hasNext() ; |
| } |
| |
| @Override |
| public QuerySolution next() { |
| check() ; |
| return other.next() ; |
| } |
| |
| @Override |
| public QuerySolution nextSolution() { |
| check() ; |
| return other.nextSolution() ; |
| } |
| |
| @Override |
| public Binding nextBinding() { |
| check() ; |
| return other.nextBinding() ; |
| } |
| |
| @Override |
| public void close() { |
| check() ; |
| other.close(); |
| } |
| |
| /** |
| * Attention: The check is only done once before the first consumer accept call. |
| * @param action The action to be performed for each element |
| */ |
| @Override |
| public void forEachRemaining(Consumer<? super QuerySolution> action) { |
| check() ; |
| other.forEachRemaining(action); |
| } |
| |
| @Override |
| public int getRowNumber() { |
| check() ; |
| return other.getRowNumber() ; |
| } |
| |
| @Override |
| public List<String> getResultVars() { |
| check() ; |
| return other.getResultVars() ; |
| } |
| |
| @Override |
| public Model getResourceModel() { |
| check() ; |
| return other.getResourceModel() ; |
| } |
| |
| private final void check() { |
| if ( ! condition.check() ) { |
| throw new ARQException("ResultSet no longer valid (QueryExecution has been closed)") ; |
| } |
| } |
| |
| |
| } |