/**
    * 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.commons.rdf.rdf4j;
  
  import java.io.IOException;
  import java.io.UncheckedIOException;
  import java.util.Collections;
  import java.util.Set;
  
  import org.apache.commons.rdf.api.AbstractGraphTest;
  import org.apache.commons.rdf.api.BlankNodeOrIRI;
  import org.apache.commons.rdf.api.Dataset;
  import org.apache.commons.rdf.api.IRI;
  import org.apache.commons.rdf.api.Literal;
  import org.apache.commons.rdf.api.Quad;
  import org.apache.commons.rdf.api.RDFTerm;
  import org.apache.commons.rdf.api.RDF;
  import org.eclipse.rdf4j.repository.RepositoryConnection;
  import org.eclipse.rdf4j.repository.RepositoryResult;
  import org.eclipse.rdf4j.repository.sail.SailRepository;
  import org.eclipse.rdf4j.sail.Sail;
  import org.eclipse.rdf4j.sail.nativerdf.NativeStore;
  import org.junit.After;
  import org.junit.Rule;
  import org.junit.rules.TemporaryFolder;
  import org.junit.rules.Timeout;
  
  /**
   * Test a graph within a file-based RDF4J {@link SailRepository}.
   * <p>
   * TIP: If the {@link #shutdownAndDelete()} take about 20 seconds this is a hint
   * that a {@link RepositoryConnection} or {@link RepositoryResult} was not
   * closed correctly.
   *
   */
  public class NativeStoreGraphTest extends AbstractGraphTest {
  
      public final class NativeStoreRDF implements RDF {
  
          RDF4J rdf4jFactory = new RDF4J(getRepository().getValueFactory());
  
          @Override
          public RDF4JGraph createGraph() {
              // We re-use the repository connection, but use a different context
              // every time
              final Set<RDF4JBlankNode> context = Collections.singleton(rdf4jFactory.createBlankNode());
              return rdf4jFactory.asGraph(getRepository(), context);
          }
  
          @Override
          public Dataset createDataset() {
              throw new UnsupportedOperationException("Can't create more than one Dataset in this test");
              // ...as the below would re-use the same repository:
              // return rdf4jFactory.asRDFTermDataset(getRepository());
          }
  
          // Delegate methods
          @Override
          public RDF4JBlankNode createBlankNode() {
              return rdf4jFactory.createBlankNode();
          }
  
          @Override
          public RDF4JBlankNode createBlankNode(final String name) {
              return rdf4jFactory.createBlankNode(name);
          }
  
          @Override
          public RDF4JIRI createIRI(final String iri) throws IllegalArgumentException, UnsupportedOperationException {
              return rdf4jFactory.createIRI(iri);
          }
  
          @Override
          public RDF4JLiteral createLiteral(final String lexicalForm) {
              return rdf4jFactory.createLiteral(lexicalForm);
          }
  
          @Override
          public Literal createLiteral(final String lexicalForm, final IRI dataType) {
              return rdf4jFactory.createLiteral(lexicalForm, dataType);
          }
  
          @Override
          public Literal createLiteral(final String lexicalForm, final String languageTag) {
             return rdf4jFactory.createLiteral(lexicalForm, languageTag);
         }
 
         @Override
         public RDF4JTriple createTriple(final BlankNodeOrIRI subject, final IRI predicate, final RDFTerm object) {
             return rdf4jFactory.createTriple(subject, predicate, object);
         }
 
         @Override
         public Quad createQuad(final BlankNodeOrIRI graphName, final BlankNodeOrIRI subject, final IRI predicate, final RDFTerm object)
                 throws IllegalArgumentException {
             return rdf4jFactory.createQuad(graphName, subject, predicate, object);
         }
     }
 
     @Rule
     public TemporaryFolder tempDir = new TemporaryFolder();
 
     private SailRepository repository;
 
     public void createRepository() throws IOException {
         final Sail sail = new NativeStore(tempDir.newFolder());
         repository = new SailRepository(sail);
         repository.initialize();
     }
 
     public synchronized SailRepository getRepository() {
         if (repository == null) {
             try {
                 createRepository();
             } catch (final IOException e) {
                 throw new UncheckedIOException(e);
             }
         }
         return repository;
     }
 
     @Rule
     /**
      * A timeout of more than 15 seconds pr test indicates typically that
      * shutdownAndDelete failed.
      */
     public Timeout globalTimeout = Timeout.seconds(15);
 
     @After
     public void shutdownAndDelete() {
         // must shutdown before we delete
         if (repository != null) {
             System.out.print("Shutting down rdf4j repository " + repository + "...");
             // NOTE:
             // If this takes about 20 seconds it means the code forgot to close
             // a
             // RepositoryConnection or RespositoryResult
             // e.g. missing a try-with-resources block
             repository.shutDown();
             System.out.println("OK");
         }
     }
 
     // private static void deleteAll(Path dir) throws IOException {
     // Files.walkFileTree(dir, new SimpleFileVisitor<Path>(){
     // @Override
     // public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
     // throws IOException {
     // Files.delete(file);
     // return FileVisitResult.CONTINUE;
     // }
     // @Override
     // public FileVisitResult postVisitDirectory(Path dir, IOException exc)
     // throws IOException {
     // FileVisitResult r = super.postVisitDirectory(dir, exc);
     // Files.delete(dir);
     // return r;
     // }
     // });
     // }
 
     @Override
     public RDF createFactory() {
         return new NativeStoreRDF();
     }
 
 }