ItemService.java

/**
 * 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.content.service;

import org.dspace.content.dao.ItemDAO;
import org.dspace.content.dao.ItemDAOFactory;
import org.dspace.content.Bitstream;
import org.dspace.content.Thumbnail;
import org.dspace.core.Context;

import java.sql.SQLException;

public class ItemService
{
    public static Thumbnail getThumbnail(Context context, int itemId, boolean requireOriginal) throws SQLException
    {
        ItemDAO dao = ItemDAOFactory.getInstance(context);

        Bitstream thumbBitstream = null;
        Bitstream primaryBitstream = dao.getPrimaryBitstream(itemId, "ORIGINAL");
        if (primaryBitstream != null)
        {
            if (primaryBitstream.getFormat().getMIMEType().equals("text/html"))
            {
                return null;
            }

            thumbBitstream = dao.getNamedBitstream(itemId, "THUMBNAIL", primaryBitstream.getName() + ".jpg");
        }
        else
        {
            if (requireOriginal)
            {
                primaryBitstream = dao.getFirstBitstream(itemId, "ORIGINAL");
            }
            
            thumbBitstream   = dao.getFirstBitstream(itemId, "THUMBNAIL");
        }

        if (thumbBitstream != null)
        {
            return new Thumbnail(thumbBitstream, primaryBitstream);
        }

        return null;
    }
}