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ODFDOM is an OpenDocument Format (ODF) framework. Its purpose is to provide an easy common way to create, access and manipulate ODF files, without requiring detailed knowledge of the ODF specification. It is designed to provide the ODF developer community with an easy lightwork programming API portable to any object-oriented language. The current reference implementation is written in Java.

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 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * Copyright 2008, 2010 Oracle and/or its affiliates. All rights reserved.
 * 
 * Use is subject to license terms.
 * 
 * Licensed 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. You can also
 * obtain a copy of the License at http://odftoolkit.org/docs/license.txt
 * 
 * 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.
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package org.odftoolkit.odfdom.pkg.rdfa;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import net.rootdev.javardfa.StatementSink;

import org.odftoolkit.odfdom.pkg.OdfFileDom;
import org.odftoolkit.odfdom.pkg.OdfFileSaxHandler;
import org.w3c.dom.Node;

import com.hp.hpl.jena.rdf.model.Literal;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.shared.PrefixMapping.IllegalPrefixException;

/**
 * To cache the Jena RDF triples parsed from RDFaParser
 *
 */
public class JenaSink implements StatementSink {

//	private OdfFileSaxHandler odf;
	private Node contextNode;
	private OdfFileDom mFileDom;
    private Map bnodeLookup;
    private URIExtractor extractor;
    private EvalContext context;

    public JenaSink(OdfFileDom mFileDom) {
		this.mFileDom = mFileDom;
		this.bnodeLookup = new HashMap();
    }

    //@Override
    public void start() {
        bnodeLookup = new HashMap();
    }

    //@Override
    public void end() {
        bnodeLookup = null;
    }

    //@Override
    public void addObject(String subject, String predicate, String object) {
    	Model model =getContextModel();
        Resource s = getResource(model, subject.trim());
        Property p = model.createProperty(predicate.trim());
        Resource o = getResource(model, object.trim());
        model.add(s, p, o);
    }

    //@Override
    public void addLiteral(String subject, String predicate, String lex, String lang, String datatype) {
    	if (lex.isEmpty()){
    		return;
    	}
    	Model model =getContextModel();
    	Resource s = getResource(model, subject.trim());
        Property p = model.createProperty(predicate.trim());
        Literal o;
        if (lang == null && datatype == null) {
            o = model.createLiteral(lex.trim());
        } else if (lang != null) {
            o = model.createLiteral(lex.trim(), lang.trim());
        } else {
            o = model.createTypedLiteral(lex.trim(), datatype.trim());
        }
        model.add(s, p, o);
    }

    private Resource getResource(Model model, String res) {
        if (res.startsWith("_:")) {
            if (bnodeLookup.containsKey(res)) {
                return bnodeLookup.get(res);
            }
            Resource bnode = model.createResource();
            bnodeLookup.put(res, bnode);
            return bnode;
        } else {
            return model.createResource(res);
        }
    }

    public void addPrefix(String prefix, String uri) {
//    	Model model =getContextModel();
//        try {
//            model.setNsPrefix(prefix.trim(), uri.trim());
//        } catch (IllegalPrefixException e) {
//        }
    }

    public void setBase(String base) {}
    
	private Model getContextModel() {
		Map cache = this.mFileDom.getInContentMetadataCache();
		Model model = cache.get(contextNode);
		if (model == null) {
			model = ModelFactory.createDefaultModel();
			this.mFileDom.getInContentMetadataCache().put(
					contextNode, model);
		}
		return model;
	}

	public Node getContextNode() {
		return contextNode;
	}

	public void setContextNode(Node contextNode) {
		this.contextNode = contextNode;
	}

	public URIExtractor getExtractor() {
		return extractor;
	}

	public void setExtractor(URIExtractor extractor) {
		this.extractor = extractor;
	}

	public EvalContext getContext() {
		return context;
	}

	public void setContext(EvalContext context) {
		this.context = context;
	}
		
	
//    // Namespace methods
//    public void setNamespaceURI(String prefix, String uri) {
//        if (uri.length() == 0) {
//            uri = base;
//        }
//        if (xmlnsMap == Collections.EMPTY_MAP) xmlnsMap = new HashMap();
//        xmlnsMap.put(prefix, uri);
//    }

}