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/**********************************************************************
 * Class RdfXmlConverter
 *  
 * Copyright (c) 2011-2012, German National Library/Deutsche Nationalbibliothek
 * Adickesallee 1, D-60322 Frankfurt am Main, Federal Republic of Germany 
 *
 * This program is free software.
 * 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
 * 
 * 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.
 * 
 * Thomas Haidlas -- German National Library
 * Kadir Karaca Kocer -- German National Library
 **********************************************************************/

package org.nbnResolving.converters;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.nbnResolving.common.URNUtils;
import org.nbnResolving.pidef.PidefDocument;
import org.nbnResolving.pidef.ResolvingInfoType;

import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.vocabulary.DCTerms;

/**
 * 
 * @author Thomas Haidlas, German National Library
 */
public class RdfXmlConverter {
	
    private static final Log LOGGER = LogFactory.getLog(RdfXmlConverter.class);
	
	/**
	 * @param rdfModel
	 * @param document
	 * @return A RDF Model
	 */
	@SuppressWarnings("static-method")
    public Model addRecordToModel(Model rdfModel, PidefDocument document){
		org.nbnResolving.pidef.HeaderType header = document.getPidef().getHeader();
		org.nbnResolving.pidef.DataType data = document.getPidef().getData();
		
		String aboutUrl = header.getRequest();
		Resource resource = rdfModel.createResource(aboutUrl);
		resource.addProperty(DCTerms.mediator, header.getSource());
		resource.addProperty(DCTerms.date, header.getTimestamp().toString());
		if (data != null) {
			String notSet = "";
			ResolvingInfoType rit = data.getResolvingInformation();
			if (rit != null) {
				LOGGER.debug("RdfXmlConverter() found. Listing detailed information");
	
				org.nbnResolving.pidef.UrlInfoType[] uit = rit.getUrlInfoArray();
				resource.addProperty(DCTerms.publisher, rit.getPiInfo().getOwner().getName());
				for (int i=0; i < uit.length; i++) {
					String url = uit[i].getUrl();
					if (url != null && !url.isEmpty()) {
						resource.addProperty(DCTerms.identifier, URNUtils.correctUrlString(url, false, false));
					}
				}
				resource.addProperty(DCTerms.isPartOf,     notSet);
				resource.addProperty(DCTerms.replaces,     notSet);
				resource.addProperty(DCTerms.isReplacedBy, notSet);
				
				if (rit.getPiInfo().getCreated() != null) {
	                resource.addProperty(DCTerms.created,  rit.getPiInfo().getCreated().toString());
				}
				if (rit.getPiInfo().getLastModified() != null) {
					resource.addProperty(DCTerms.modified, rit.getPiInfo().getLastModified().toString());
				}
			} else {
				//resolving information does not exist. try  section
				if (data.getLinks() != null) {
					//loop all the links and write them in RDF
					for (int i=0; i < data.getLinks().sizeOfLinkArray(); i++) {
						String url = data.getLinks().getLinkArray(i);
						if (url != null && !url.isEmpty()) {
							//getFrontpage()?; Primary?
							resource.addProperty(DCTerms.identifier, URNUtils.correctUrlString(url, false, false));
						}
					}
				}
			}
		}
		return rdfModel;
	}

}