eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/operation/MoveMediaInListOperation.java

   1 /**
   2 * Copyright (C) 2007 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.taxeditor.editor.view.media.operation;
  11
  12 import java.util.Collections;
  13 import java.util.List;
  14 import java.util.Set;
  15
  16 import org.eclipse.core.commands.ExecutionException;
  17 import org.eclipse.core.commands.operations.IUndoContext;
  18 import org.eclipse.core.runtime.IAdaptable;
  19 import org.eclipse.core.runtime.IProgressMonitor;
  20 import org.eclipse.core.runtime.IStatus;
  21
  22 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  23 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  24 import eu.etaxonomy.cdm.model.media.Media;
  25 import eu.etaxonomy.cdm.model.taxon.Taxon;
  26 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  27 import eu.etaxonomy.taxeditor.operation.AbstractPostTaxonOperation;
  28 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  29
  30 /**
  31  * <p>MoveMediaInListOperation class.</p>
  32  *
  33  * @author p.ciardelli
  34  * @created 05.02.2009
  35  * @version 1.0
  36  */
  37 public class MoveMediaInListOperation extends AbstractPostTaxonOperation {
  38
  39         /** Constant <code>UP=1</code> */
  40         public static final int UP = 1;
  41         /** Constant <code>DOWN=-1</code> */
  42         public static final int DOWN = -1;
  43
  44         private DescriptionBase description;
  45         private Media media;
  46         private int direction;
  47
  48         /**
  49          * <p>Constructor for MoveMediaInListOperation.</p>
  50          *
  51          * @param undoContext a {@link org.eclipse.core.commands.operations.IUndoContext} object.
  52          * @param taxon a {@link eu.etaxonomy.cdm.model.taxon.Taxon} object.
  53          * @param label a {@link java.lang.String} object.
  54          * @param description a {@link eu.etaxonomy.cdm.model.description.DescriptionBase} object.
  55          * @param media a {@link eu.etaxonomy.cdm.model.media.Media} object.
  56          * @param direction a int.
  57          * @param postOperationEnabled a {@link eu.etaxonomy.taxeditor.operation.IPostOperationEnabled} object.
  58          */
  59         public MoveMediaInListOperation(String label, IUndoContext undoContext,
  60                         Taxon taxon, DescriptionBase description, Media media,
  61                         int direction, IPostOperationEnabled postOperationEnabled) {
  62                 super(label, undoContext, taxon, postOperationEnabled);
  63
  64                 this.description = description;
  65                 this.media = media;
  66                 this.direction = direction;
  67         }
  68
  69         /* (non-Javadoc)
  70          * @see org.eclipse.core.commands.operations.AbstractOperation#execute(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  71          */
  72         /** {@inheritDoc} */
  73         @Override
  74         public IStatus execute(IProgressMonitor monitor, IAdaptable info)
  75                         throws ExecutionException {
  76
  77                 monitor.worked(20);
  78
  79                 moveMedia(description, media, direction);
  80                 monitor.worked(40);
  81
  82                 return postExecute(media);
  83         }
  84
  85         /* (non-Javadoc)
  86          * @see org.eclipse.core.commands.operations.AbstractOperation#redo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  87          */
  88         /** {@inheritDoc} */
  89         @Override
  90         public IStatus redo(IProgressMonitor monitor, IAdaptable info)
  91                         throws ExecutionException {
  92                 return execute(monitor, info);
  93         }
  94
  95         /* (non-Javadoc)
  96          * @see org.eclipse.core.commands.operations.AbstractOperation#undo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  97          */
  98         /** {@inheritDoc} */
  99         @Override
 100         public IStatus undo(IProgressMonitor monitor, IAdaptable info)
 101                         throws ExecutionException {
 102                 moveMedia(description, media, direction * -1);
 103                 return postExecute(media);
 104         }
 105
 106         private void moveMedia(DescriptionBase description, Media media, int direction){
 107                 Set<DescriptionElementBase> elements = description.getElements();
 108
 109                 if(elements.size() != 1){
 110                         MessagingUtils.error(this.getClass(), "More than one description element in this image gallery", null);
 111                 }
 112
 113                 DescriptionElementBase element = elements.iterator().next();
 114
 115                 List<Media> medias = element.getMedia();
 116
 117                 int index = medias.indexOf(media);
 118                 int newIndex = index + direction;
 119
 120                 if(index < 0){
 121                         return;
 122                 }
 123
 124                 if (newIndex >= 0 && newIndex < medias.size()) {
 125                         try{
 126                                 Collections.swap(medias, newIndex, index);
 127                         }catch(ArrayIndexOutOfBoundsException e){
 128                                 MessagingUtils.error(this.getClass(), e);
 129                         }
 130                 }
 131         }
 132 }