Package org.jrdf.parser.n3

Source Code of org.jrdf.parser.n3.N3EventReaderFactory

/*
* $Header$
* $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
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*    the documentation and/or other materials provided with the
*    distribution.
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* 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
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* 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
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* 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/>.
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*/

package org.jrdf.parser.n3;

import org.jrdf.collection.MapFactory;
import org.jrdf.graph.Graph;
import org.jrdf.parser.NamespaceListener;
import org.jrdf.parser.ParserBlankNodeFactory;
import org.jrdf.parser.RDFEventReader;
import org.jrdf.parser.RDFEventReaderFactory;
import org.jrdf.parser.RDFEventReaderImpl;
import org.jrdf.parser.bnodefactory.ParserBlankNodeFactoryImpl;
import org.jrdf.parser.line.FormatParser;
import org.jrdf.parser.line.TriplesParser;
import org.jrdf.parser.line.TriplesParserImpl;
import org.jrdf.parser.n3.parser.NamespaceAwareNodeMaps;
import org.jrdf.parser.n3.parser.NamespaceAwareNodeParsersFactory;
import org.jrdf.parser.n3.parser.NamespaceAwareNodeParsersFactoryImpl;
import org.jrdf.parser.n3.parser.NamespaceAwareTripleParser;
import org.jrdf.parser.n3.parser.NamespaceAwareURIReferenceParser;
import org.jrdf.parser.n3.parser.PrefixParserImpl;
import org.jrdf.parser.n3.parser.PrefixParser;
import org.jrdf.parser.ntriples.parser.BlankNodeParser;
import org.jrdf.parser.ntriples.parser.LiteralParser;
import org.jrdf.parser.ntriples.parser.NodeMaps;
import org.jrdf.parser.ntriples.parser.RegexTripleParser;
import org.jrdf.parser.ntriples.parser.RegexTripleParserImpl;
import org.jrdf.parser.ntriples.parser.TripleParser;
import org.jrdf.util.boundary.RegexMatcherFactory;
import org.jrdf.util.boundary.RegexMatcherFactoryImpl;

import java.io.InputStream;
import java.io.Reader;
import java.net.URI;

public class N3EventReaderFactory implements RDFEventReaderFactory {
    private static final RegexMatcherFactory REGEX_MATCHER_FACTORY = new RegexMatcherFactoryImpl();
    private final NamespaceListener namespaceListener;
    private final MapFactory mapFactory;

    public N3EventReaderFactory(final MapFactory newMapFactory, final NamespaceListener newNamespaceListener) {
        mapFactory = newMapFactory;
        namespaceListener = newNamespaceListener;
    }

    public RDFEventReader createRDFEventReader(final InputStream stream, final URI baseURI, final Graph graph) {
        final TriplesParser triplesParser = new TriplesParserImpl(init(graph));
        final PrefixParser prefixParser = new PrefixParserImpl(REGEX_MATCHER_FACTORY, namespaceListener);
        final FormatParser parser = new N3FormatParser(triplesParser, prefixParser);
        return new RDFEventReaderImpl(stream, baseURI, parser);
    }

    public RDFEventReader createRDFEventReader(final Reader reader, final URI baseURI, final Graph graph) {
        final TriplesParser triplesParser = new TriplesParserImpl(init(graph));
        final PrefixParser prefixParser = new PrefixParserImpl(REGEX_MATCHER_FACTORY, namespaceListener);
        final FormatParser parser = new N3FormatParser(triplesParser, prefixParser);
        return new RDFEventReaderImpl(reader, baseURI, parser);
    }

    private TripleParser init(final Graph graph) {
        final NamespaceAwareNodeParsersFactory parsersFactory = new NamespaceAwareNodeParsersFactoryImpl(graph,
            mapFactory, REGEX_MATCHER_FACTORY, namespaceListener);
        final NamespaceAwareURIReferenceParser uriReferenceParser = parsersFactory.getUriReferenceParser();
        final ParserBlankNodeFactory blankNodeFactory = new ParserBlankNodeFactoryImpl(mapFactory,
            graph.getElementFactory());
        final BlankNodeParser blankNodeParser = parsersFactory.getBlankNodeParserWithFactory(blankNodeFactory);
        final LiteralParser literalParser = parsersFactory.getLiteralParser();
        final NodeMaps nodeMaps = new NamespaceAwareNodeMaps(uriReferenceParser, blankNodeParser, literalParser);
        final RegexTripleParser regexTripleFactory = new RegexTripleParserImpl(REGEX_MATCHER_FACTORY,
            graph.getTripleFactory(), nodeMaps);
        return new NamespaceAwareTripleParser(REGEX_MATCHER_FACTORY, blankNodeParser, regexTripleFactory);
    }
}
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