/**
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE and NOTICE files at the root of the source
 * tree and available online at
 *
 * http://www.dspace.org/license/
 */
package org.dspace.sword;

import org.dspace.core.Context;
import org.dspace.core.PluginManager;
import org.dspace.content.DSpaceObject;
import org.dspace.content.Collection;
import org.dspace.content.Item;

import org.purl.sword.base.Deposit;
import org.purl.sword.base.SWORDErrorException;
import org.purl.sword.base.ErrorCodes;

/**
 * Factory class which will mint objects conforming to the
 * SWORDIngester interface.
 * 
 * @author Richard Jones
 *
 */
public class SWORDIngesterFactory
{
	/**
	 * Generate an object which conforms to the SWORDIngester interface.
	 * This Factory method may use the given DSpace context and the given
	 * SWORD Deposit request to decide on the most appropriate implementation
	 * of the interface to return.
	 * 
	 * To configure how this method will respond, configure the package ingester
	 * for the appropriate media types and defaults.  See the sword configuration
	 * documentation for more details.
	 * 
	 * @param context
	 * @param deposit
	 * @return
	 * @throws DSpaceSWORDException
	 */
	public static SWORDIngester getInstance(Context context, Deposit deposit, DSpaceObject dso)
            throws DSpaceSWORDException, SWORDErrorException
    {
		if (dso instanceof Collection)
		{
			SWORDIngester ingester = (SWORDIngester) PluginManager.getNamedPlugin(SWORDIngester.class, deposit.getPackaging());
			if (ingester == null)
			{
				throw new SWORDErrorException(ErrorCodes.ERROR_CONTENT, "No ingester configured for this package type");
			}
			return ingester;
		}
		else if (dso instanceof Item)
		{
			SWORDIngester ingester = (SWORDIngester) PluginManager.getNamedPlugin(SWORDIngester.class, "SimpleFileIngester");
			if (ingester == null)
			{
				throw new DSpaceSWORDException("SimpleFileIngester is not configured in plugin manager");
			}
			return ingester;
		}

		throw new DSpaceSWORDException("No ingester could be found which works for this DSpace Object");
	}
}
