/*
* $Header$
* $Revision: 2985 $
* $Date: 2009-05-23 13:37:55 +1000 (Sat, 23 May 2009) $
*
* ====================================================================
*
* 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.graph.local;
import static org.jrdf.graph.AbstractURIReference.validateURI;
import org.jrdf.graph.GraphElementFactoryException;
import org.jrdf.graph.GraphValueFactory;
import org.jrdf.graph.Literal;
import org.jrdf.graph.URIReference;
import org.jrdf.graph.local.index.nodepool.Localizer;
import org.jrdf.graph.local.index.nodepool.NodePool;
import org.jrdf.util.EscapeUtil;
import static org.jrdf.util.param.ParameterUtil.checkNotNull;
import java.net.URI;
public final class GraphValueFactoryImpl implements GraphValueFactory {
private final NodePool nodePool;
private final Localizer localizer;
/**
* Package scope constructor.
*/
public GraphValueFactoryImpl(NodePool newNodePool, Localizer newLocalizer) {
checkNotNull(newNodePool, newLocalizer);
this.nodePool = newNodePool;
this.localizer = newLocalizer;
}
public URIReference createURIReference(URI uri) throws GraphElementFactoryException {
return createURIReference(uri, true);
}
public URIReference createURIReference(URI uri, boolean validate) throws GraphElementFactoryException {
if (null == uri) {
throw new GraphElementFactoryException("URI may not be null for a URIReference");
}
if (validate) {
validateURI(uri);
}
return getLocalURIReference(uri, validate);
}
public Literal createLiteral(Object object) {
final Literal literal = new LiteralImpl(object);
return getLocalLiteral(literal.getEscapedForm());
}
public Literal createLiteral(String lexicalValue) {
return getLocalLiteral("\"" + EscapeUtil.escape(lexicalValue) + "\"");
}
public Literal createLiteral(String lexicalValue, String languageType) {
return getLocalLiteral("\"" + EscapeUtil.escape(lexicalValue) + "\"" + "@" + languageType);
}
public Literal createLiteral(String lexicalValue, URI datatypeURI) {
return getLocalLiteral("\"" + EscapeUtil.escape(lexicalValue) + "\"" + "^^<" + datatypeURI + ">");
}
private URIReference getLocalURIReference(URI uri, boolean validate) {
Long nodeId = nodePool.getNodeIdByString(uri.toString());
URIReference newURIReference;
if (null != nodeId) {
newURIReference = (URIReference) nodePool.getNodeById(nodeId);
} else {
newURIReference = localizer.createLocalURIReference(uri, validate);
}
return newURIReference;
}
private Literal getLocalLiteral(String escapedForm) {
Long nodeId = nodePool.getNodeIdByString(escapedForm);
Literal newLiteral;
if (null != nodeId) {
newLiteral = (Literal) nodePool.getNodeById(nodeId);
} else {
newLiteral = localizer.createLocalLiteral(escapedForm);
}
return newLiteral;
}
}