/*
   Copyright (C) 2005-2012, by the President and Fellows of Harvard College.

   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.

   Dataverse Network - A web application to share, preserve and analyze research data.
   Developed at the Institute for Quantitative Social Science, Harvard University.
   Version 3.0.
*/
/**
*Copyright (c) 2000-2002 OCLC Online Computer Library Center,
*Inc. and other contributors. All rights reserved.  The contents of this file, as updated
*from time to time by the OCLC Office of Research, are subject to OCLC Research
*Public License Version 2.0 (the "License"); you may not use this file except in
*compliance with the License. You may obtain a current copy of the License at
*http://purl.oclc.org/oclc/research/ORPL/.  Software distributed under the License is
*distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
*or implied. See the License for the specific language governing rights and limitations
*under the License.  This software consists of voluntary contributions made by many
*individuals on behalf of OCLC Research. For more information on OCLC Research,
*please see http://www.oclc.org/oclc/research/.
*
*The Original Code is XML2oai_dc.java.
*The Initial Developer of the Original Code is Jeff Young.
*Portions created by ______________________ are
*Copyright (C) _____ _______________________. All Rights Reserved.
*Contributor(s):______________________________________.
*/
package edu.harvard.iq.dvn.core.web.oai.catalog;

import ORG.oclc.oai.server.crosswalk.Crosswalk;
import java.util.Properties;
import ORG.oclc.oai.server.verb.CannotDisseminateFormatException;

/**
 * Convert native "item" to oai_dc. In this case, the native "item"
 * is assumed to already be formatted as an OAI <record> element,
 * with the possible exception that multiple metadataFormats may
 * be present in the <metadata> element. The "crosswalk", merely
 * involves pulling out the one that is requested.
 */
public class DVNXML2ddi extends Crosswalk implements java.io.Serializable  {
    private static final String elementName = "codeBook";
    private static final String elementStart = "<" + elementName;
    private static final String elementEnd = elementName + ">";
	
    /**
     * The constructor assigns the schemaLocation associated with this crosswalk. Since
     * the crosswalk is trivial in this case, no properties are utilized.
     *
     * @param properties properties that are needed to configure the crosswalk.
     */
    public DVNXML2ddi(Properties properties) {
//	super("http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd");
        super("http://www.icpsr.umich.edu/DDI http://www.icpsr.umich.edu/DDI/Version2-0.xsd");
    }

    /**
     * Can this nativeItem be represented in ddi format?
     * @param nativeItem a record in native format
     * @return true if ddi format is possible, false otherwise.
     */
    public boolean isAvailableFor(Object nativeItem) {
	String fullItem = (String)nativeItem;
	if ((fullItem.indexOf(elementStart)) >= 0)
	    return true;
	return false;
    }

    /**
     * Perform the actual crosswalk.
     *
     * @param nativeItem the native "item". In this case, it is
     * already formatted as an OAI <record> element, with the
     * possible exception that multiple metadataFormats are
     * present in the <metadata> element.
     * @return a String containing the XML to be stored within the <metadata> element.
     * @exception CannotDisseminateFormatException nativeItem doesn't support this format.
     */
    public String createMetadata(Object nativeItem)
	throws CannotDisseminateFormatException {
	String fullItem = (String)nativeItem;
//        Document fullItem = (Document) nativeItem;

        
	int startOffset = fullItem.indexOf(elementStart);
	if (startOffset == -1) {
	    throw new CannotDisseminateFormatException(getSchemaLocation());
	}
	int endOffset = fullItem.indexOf(elementEnd) + elementEnd.length();
	return fullItem.substring(startOffset, endOffset);
         
    }
}