com.ibm.research.rdf.store.cmd.DumpRdfStore.java Source code

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Here is the source code for com.ibm.research.rdf.store.cmd.DumpRdfStore.java

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/******************************************************************************
 * Copyright (c) 2015 IBM Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *****************************************************************************/
package com.ibm.research.rdf.store.cmd;

import java.io.BufferedOutputStream;
import java.io.PrintStream;
import java.sql.Connection;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openjena.riot.RiotWriter;

import com.hp.hpl.jena.query.Dataset;
import com.ibm.research.rdf.store.Context;
import com.ibm.research.rdf.store.Store;
import com.ibm.research.rdf.store.Store.Backend;
import com.ibm.research.rdf.store.StoreManager;
import com.ibm.research.rdf.store.jena.RdfStoreException;
import com.ibm.research.rdf.store.jena.RdfStoreFactory;

public class DumpRdfStore extends AbstractRdfCommand {

    private static final Log log = LogFactory.getLog(DumpRdfStore.class);

    public static void main(String[] args) {

        AbstractRdfCommand cmd = new DumpRdfStore();
        cmd.runCmd(args, "dumprdfstore", null);
    }

    @Override
    public void doWork(Connection conn) {

        // create the store.
        try {

            Store store = StoreManager.connectStore(conn, Backend.valueOf(params.get("-backend")),
                    params.get("-schema"), storeName, Context.defaultContext);
            Dataset ds = RdfStoreFactory.connectDataset(store, conn, Backend.valueOf(params.get("-backend")));

            PrintStream ps = new PrintStream(new BufferedOutputStream(System.out, 1000000));
            RiotWriter.writeNQuads(ps, ds.asDatasetGraph());
            ps.close();
        } catch (RdfStoreException e) {
            log.error(e);
            System.out.println(e.getLocalizedMessage());
        } catch (Exception e) {
            log.error(e);
            System.out.println(e.getLocalizedMessage());
        }
    }

}