104 lines
3.3 KiB
Java
104 lines
3.3 KiB
Java
package nz.ac.waikato.its.irr.scripts;
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import org.apache.commons.lang.StringUtils;
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import org.dspace.authorize.AuthorizeException;
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import org.dspace.content.*;
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import org.dspace.core.Constants;
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import org.dspace.core.Context;
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import org.dspace.handle.HandleManager;
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import java.io.IOException;
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import java.sql.SQLException;
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import java.util.Arrays;
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/**
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* @author Andrea Schweer schweer@waikato.ac.nz for the LCoNZ Institutional Research Repositories
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*/
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public class RemovePNGThumbnailsForPDFs {
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public static void main(String[] args) {
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String parentHandle = null;
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if (args.length >= 1) {
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parentHandle = args[0];
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}
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Context context = null;
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try {
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context = new Context();
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context.turnOffAuthorisationSystem();
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if (StringUtils.isBlank(parentHandle)) {
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process(context, Item.findAll(context));
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} else {
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DSpaceObject parent = HandleManager.resolveToObject(context, parentHandle);
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if (parent != null) {
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switch (parent.getType()) {
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case Constants.COLLECTION:
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process(context, ((Collection) parent).getAllItems()); // getAllItems because we want to work on non-archived ones as well
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break;
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case Constants.COMMUNITY:
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Collection[] collections = ((Community) parent).getCollections();
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for (Collection collection : collections) {
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process(context, collection.getAllItems()); // getAllItems because we want to work on non-archived ones as well
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}
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break;
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case Constants.SITE:
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process(context, Item.findAll(context));
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break;
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case Constants.ITEM:
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processItem((Item) parent);
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context.commit();
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break;
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}
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}
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}
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} catch (SQLException | AuthorizeException | IOException e) {
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e.printStackTrace(System.err);
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} finally {
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if (context != null && context.isValid()) {
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context.abort();
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}
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}
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}
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private static void process(Context context, ItemIterator items) throws SQLException, IOException, AuthorizeException {
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while (items.hasNext()) {
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Item item = items.next();
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processItem(item);
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context.commit();
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item.decache();
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}
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}
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private static void processItem(Item item) throws SQLException, AuthorizeException, IOException {
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Bundle[] thumbnailBundles = item.getBundles("THUMBNAIL");
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for (Bundle bundle : thumbnailBundles) {
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//System.out.println(Arrays.toString(bundle.getItems()));
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//[org.dspace.content.Item@92944ff4]
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Bitstream[] bitstreams = bundle.getBitstreams();
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for (Bitstream bitstream : bitstreams) {
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//System.out.println(bitstream.getName());
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//AgricSystems.jpg.jpg
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if ("image/png".equals(bitstream.getFormat().getMIMEType()) && "Generated Thumbnail".equals(bitstream.getDescription())) {
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String bitstreamName = bitstream.getName();
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if (hasJpegThumbnail(thumbnailBundles, bitstreamName)) {
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bundle.removeBitstream(bitstream);
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System.out.println("Removed generated PDF thumbnail " + bitstreamName + " from item id=" + item.getID() + ", it has a new JPG thumbnail");
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}
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}
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}
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}
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}
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private static boolean hasJpegThumbnail(Bundle[] thumbnailBundles, String bitstreamName) {
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String jpgName = StringUtils.removeEndIgnoreCase(bitstreamName, ".png") + ".jpg";
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for (Bundle bundle : thumbnailBundles) {
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Bitstream candidate = bundle.getBitstreamByName(jpgName);
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if (candidate != null) {
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return true;
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}
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}
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return false;
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}
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}
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