/*

  * 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.any23.writer;

 import org.apache.any23.extractor.ExtractionContext;

 import org.openrdf.model.Resource;

 import org.openrdf.model.URI;

 import org.openrdf.model.Value;

 import org.openrdf.repository.RepositoryConnection;

 import org.openrdf.repository.RepositoryException;

 /**

  * A <i>Sesame repository</i> triple writer.

  *

  * @see org.openrdf.repository.Repository

  */

 public class RepositoryWriter implements TripleHandler {

     private final RepositoryConnection conn;

     private final Resource overrideContext;

     public RepositoryWriter(RepositoryConnection conn) {

         this(conn, null);

     }

     public RepositoryWriter(RepositoryConnection conn, Resource overrideContext) {

         this.conn = conn;

         this.overrideContext = overrideContext;

     }

     public void startDocument(URI documentURI) throws TripleHandlerException {

         // ignore

     }

     public void openContext(ExtractionContext context) throws TripleHandlerException {

         // ignore

     }

     public void receiveTriple(

             Resource s,

             URI p,

             Value o,

             URI g,

           ExtractionContext context

     ) throws TripleHandlerException {

         try {

             conn.add(

                 conn.getValueFactory().createStatement(s, p, o, g),

                 getContextResource(context.getDocumentURI())

             );

         } catch (RepositoryException ex) {

             throw new TripleHandlerException(String.format("Error while receiving triple: %s %s %s", s, p , o),

                     ex

             );

         }

     }

     public void receiveNamespace(

             String prefix,

             String uri,

             ExtractionContext context

     ) throws TripleHandlerException {

         try {

             conn.setNamespace(prefix, uri);

         } catch (RepositoryException ex) {

             throw new TripleHandlerException(String.format("Error while receiving namespace: %s:%s", prefix, uri),

                     ex

             );

         }

     }

     public void closeContext(ExtractionContext context) throws TripleHandlerException {

         // ignore

     }

     public void close()throws TripleHandlerException {

         // ignore

     }

     public void endDocument(URI documentURI) throws TripleHandlerException {

         // ignore

     }

     public void setContentLength(long contentLength) {

         //ignore

     }

     private Resource getContextResource(Resource fromExtractor) {

         if (overrideContext != null) {

             return overrideContext;

         }

         return fromExtractor;

     }

 }