/*
* $Header$
* $Revision: 982 $
* $Date: 2006-12-08 18:42:51 +1000 (Fri, 08 Dec 2006) $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003-2009 The JRDF Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* the JRDF Project (http://jrdf.sf.net/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The JRDF Project" and "JRDF" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* newmana@users.sourceforge.net.
*
* 5. Products derived from this software may not be called "JRDF"
* nor may "JRDF" appear in their names without prior written
* permission of the JRDF Project.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the JRDF Project. For more
* information on JRDF, please see <http://jrdf.sourceforge.net/>.
*
*/
package org.jrdf.example;
import org.jrdf.PersistentJRDFFactory;
import org.jrdf.PersistentJRDFFactoryImpl;
import org.jrdf.graph.Graph;
import org.jrdf.graph.GraphElementFactory;
import org.jrdf.graph.Resource;
import org.jrdf.graph.GraphException;
import org.jrdf.util.DirectoryHandler;
import org.jrdf.util.TempDirectoryHandler;
import java.net.URI;
public class PersistanceExample {
private static final DirectoryHandler HANDLER = new TempDirectoryHandler();
private static final PersistentJRDFFactory JRDF_FACTORY = PersistentJRDFFactoryImpl.getFactory(HANDLER);
public static void main(String[] args) throws Exception {
try {
if (!JRDF_FACTORY.hasGraph("foo") || !JRDF_FACTORY.hasGraph("bar")) {
HANDLER.removeDir();
HANDLER.makeDir();
createNewTriples();
}
getExistingTriples();
} finally {
JRDF_FACTORY.close();
}
}
private static void getExistingTriples() throws GraphException {
printOutTriples("foo");
printOutTriples("bar");
}
private static void printOutTriples(String name) throws GraphException {
Graph existingGraph = JRDF_FACTORY.getExistingGraph(name);
long noTriples = existingGraph.getNumberOfTriples();
System.out.println("Existing graph recovered " + name + ", found " + noTriples);
System.out.println("Got: " + existingGraph);
}
private static void createNewTriples() throws GraphException {
System.out.println("Creating new graphs");
Graph fooGraph = JRDF_FACTORY.getNewGraph("foo");
Graph barGraph = JRDF_FACTORY.getNewGraph("bar");
GraphElementFactory barElementFactory = barGraph.getElementFactory();
URI uri1 = URI.create("urn:hello");
URI uri2 = URI.create("urn:there");
Resource resource = barElementFactory.createResource(uri1);
resource.addValue(uri1, uri2);
resource.addValue(uri2, uri2);
GraphElementFactory fooElementFactory = fooGraph.getElementFactory();
Resource blankResource = fooElementFactory.createResource();
blankResource.addValue(uri1, uri2);
blankResource.addValue(uri1, uri1);
blankResource.addValue(uri2, uri2);
}
}