/*
* 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 tdb;
import arq.cmdline.ModLangOutput ;
import jena.cmd.CmdException ;
import org.apache.jena.riot.RDFDataMgr ;
import org.apache.jena.riot.RDFFormat ;
import org.apache.jena.riot.RDFLanguages ;
import org.apache.jena.sparql.core.DatasetGraph ;
import tdb.cmdline.CmdTDB ;
public class tdbdump extends CmdTDB
{
static ModLangOutput modLangOutput = new ModLangOutput() ;
static public void main(String... argv)
{
CmdTDB.init() ;
new tdbdump(argv).mainRun() ;
}
protected tdbdump(String[] argv)
{
super(argv) ;
addModule(modLangOutput) ;
}
@Override
protected String getSummary()
{
return getCommandName()+" : Write a dataset to stdout (defaults to N-Quads)" ;
}
@Override
protected void exec()
{
DatasetGraph dsg = super.getDatasetGraphTDB() ;
// Prefer stream over fully pretty output formats.
RDFFormat fmt = modLangOutput.getOutputStreamFormat() ;
// Stream writing happens naturally - no need to call StreamRDFWriter.
//if ( fmt != null && StreamRDFWriter.registered(fmt) )
if ( fmt == null )
fmt = modLangOutput.getOutputFormatted() ;
if ( fmt == null )
// Default.
fmt = RDFFormat.NQUADS ;
if ( ! RDFLanguages.isQuads(fmt.getLang() ))
throw new CmdException("Databases can be dumped only in quad formats (e.g. Trig, N-Quads), not "+fmt.getLang()) ;
RDFDataMgr.write(System.out, dsg, fmt) ;
}
}