/*
* Copyright (c) 2008, Rickard Öberg. All Rights Reserved.
*
* 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.
*
*/
package org.qi4j.index.rdf.indexing;
import java.io.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
import org.openrdf.repository.Repository;
import org.openrdf.repository.RepositoryConnection;
import org.openrdf.repository.RepositoryException;
import org.openrdf.rio.RDFFormat;
import org.openrdf.rio.RDFWriter;
import org.openrdf.rio.Rio;
import org.qi4j.api.injection.scope.Service;
import org.qi4j.api.mixin.Mixins;
import org.qi4j.spi.query.IndexExporter;
/**
* JAVADOC
*/
@Mixins( RdfExporter.RdfExporterMixin.class )
public interface RdfExporter
extends IndexExporter
{
/**
* JAVADOC
*/
class RdfExporterMixin
implements IndexExporter
{
@Service
private Repository repository;
@Override
public void exportReadableToStream( PrintStream out )
throws IOException
{
RDFWriter rdfWriter = Rio.createWriter( RDFFormat.TRIG, out );
try
{
final RepositoryConnection connection = repository.getConnection();
try
{
connection.export( rdfWriter );
}
catch( Exception e )
{
e.printStackTrace();
}
finally
{
connection.close();
}
}
catch( RepositoryException e )
{
throw new IOException( e );
}
}
@Override
public void exportFormalToWriter( PrintWriter out )
throws IOException
{
RDFWriter rdfWriter = Rio.createWriter( RDFFormat.RDFXML, out );
try
{
final RepositoryConnection connection = repository.getConnection();
try
{
connection.export( rdfWriter );
}
catch( Exception e )
{
e.printStackTrace();
}
finally
{
connection.close();
}
}
catch( RepositoryException e )
{
throw new IOException( e );
}
}
}
}