code: package it.unibz.inf.ontop.docker;
  
  /*
   * #%L
   * ontop-test
   * %%
   * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
   * %%
   * Licensed 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.
   * #L%
   */
  
  import org.eclipse.rdf4j.model.IRI;
  import org.eclipse.rdf4j.model.Statement;
  import org.eclipse.rdf4j.model.ValueFactory;
  import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
  import org.eclipse.rdf4j.model.vocabulary.RDF;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * Below is an example of using ResultSetInfo in the test framework.
   * <p>
   * 1. To check the size of result set:
   *
   * <pre>
   * {@code
   * (at)prefix rsi: <http://ontop.inf.unibz.it/tests/rs-info#> .
   * (at)prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
   * (at)prefix :    <http://example.org/#> .
   *
   * []  rdf:type               rsi:ResultSetInfo ;
   *     rsi:size               "99" .
   * }
   * </pre>
   *
   * 2. To check the thrown exception (the <code>rsi:size</code> is optional):
   * <pre>
   * {@code
   * (at)prefix rsi: <http://ontop.inf.unibz.it/tests/rs-info#> .
   * (at)prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
   * (at)prefix :    <http://example.org/#> .
   *
   * []  rdf:type               rsi:ResultSetInfo ;
   *     rsi:size               "-1" ;
   *     rsi:thrownException    "java.io.IOException" .
   * }
   */
  
  public class ResultSetInfo {
  
  	private static final String NAMESPACE = "http://ontop.inf.unibz.it/tests/rs-info#";
  
  	private static final IRI RESULTSET_INFO;
  	private static final IRI RESULTSET_SIZE;
  	private static final IRI THROWN_EXCEPTION;
  
  	static {
  		ValueFactory vf = SimpleValueFactory.getInstance();
  		RESULTSET_INFO = vf.createIRI(NAMESPACE, "ResultSetInfo");
  		RESULTSET_SIZE = vf.createIRI(NAMESPACE, "size");
  		THROWN_EXCEPTION = vf.createIRI(NAMESPACE, "thrownException");
  	}
  
  
  	private final Map<String, Object> info = new HashMap<>();
  	
  	public ResultSetInfo() {
  		// NO-OP
  	}
  	
  	public ResultSetInfo(Map<String, Object> otherInfo) {
  		info.putAll(otherInfo);
  	}
  	
  	public void put(String key, Object value) {
  		info.put(key, value);
  	}
  	
  	public Object get(String key) {
  		return info.get(key);
  	}
  
  	public static ResultSetInfo toResultSetInfo(Set<Statement> resultGraph) {
  		ResultSetInfo rsInfo = new ResultSetInfo();
  		for (Statement stmt : resultGraph) {
  			IRI predicate = stmt.getPredicate();
  			if (predicate.equals(RESULTSET_SIZE)) {
  				rsInfo.put("counter", Integer.parseInt(stmt.getObject().stringValue()));
  			} else if (predicate.equals(THROWN_EXCEPTION)) {
  				rsInfo.put("thrownException", stmt.getObject().stringValue());
  			} else if (predicate.equals(RDF.TYPE)) {
  				// NO-OP
  			} else {
  				throw new RuntimeException("Unsupported URI: " + predicate);
  			}
  		}
  		return rsInfo;
  	}
  
  }
  