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.editor.l10n.Messages;
  27 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  28 import eu.etaxonomy.taxeditor.operation.AbstractPostTaxonOperation;
  29 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  30
  31 /**
  32  * <p>MoveMediaInListOperation class.</p>
  33  *
  34  * @author p.ciardelli
  35  * @created 05.02.2009
  36  * @version 1.0
  37  */
  38 public class MoveMediaInListOperation extends AbstractPostTaxonOperation {
  39
  40         /** Constant <code>UP=1</code> */
  41         public static final int UP = 1;
  42         /** Constant <code>DOWN=-1</code> */
  43         public static final int DOWN = -1;
  44
  45         private DescriptionBase description;
  46         private Media media;
  47         private int direction;
  48
  49         /**
  50          * <p>Constructor for MoveMediaInListOperation.</p>
  51          *
  52          * @param undoContext a {@link org.eclipse.core.commands.operations.IUndoContext} object.
  53          * @param taxon a {@link eu.etaxonomy.cdm.model.taxon.Taxon} object.
  54          * @param label a {@link java.lang.String} object.
  55          * @param description a {@link eu.etaxonomy.cdm.model.description.DescriptionBase} object.
  56          * @param media a {@link eu.etaxonomy.cdm.model.media.Media} object.
  57          * @param direction a int.
  58          * @param postOperationEnabled a {@link eu.etaxonomy.taxeditor.operation.IPostOperationEnabled} object.
  59          */
  60         public MoveMediaInListOperation(String label, IUndoContext undoContext,
  61                         Taxon taxon, DescriptionBase description, Media media,
  62                         int direction, IPostOperationEnabled postOperationEnabled) {
  63                 super(label, undoContext, taxon, postOperationEnabled);
  64
  65                 this.description = description;
  66                 this.media = media;
  67                 this.direction = direction;
  68         }
  69
  70         /* (non-Javadoc)
  71          * @see org.eclipse.core.commands.operations.AbstractOperation#execute(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  72          */
  73         /** {@inheritDoc} */
  74         @Override
  75         public IStatus execute(IProgressMonitor monitor, IAdaptable info)
  76                         throws ExecutionException {
  77
  78                 monitor.worked(20);
  79
  80                 moveMedia(description, media, direction);
  81                 monitor.worked(40);
  82
  83                 return postExecute(media);
  84         }
  85
  86         /* (non-Javadoc)
  87          * @see org.eclipse.core.commands.operations.AbstractOperation#redo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  88          */
  89         /** {@inheritDoc} */
  90         @Override
  91         public IStatus redo(IProgressMonitor monitor, IAdaptable info)
  92                         throws ExecutionException {
  93                 return execute(monitor, info);
  94         }
  95
  96         /* (non-Javadoc)
  97          * @see org.eclipse.core.commands.operations.AbstractOperation#undo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  98          */
  99         /** {@inheritDoc} */
 100         @Override
 101         public IStatus undo(IProgressMonitor monitor, IAdaptable info)
 102                         throws ExecutionException {
 103                 moveMedia(description, media, direction * -1);
 104                 return postExecute(media);
 105         }
 106
 107         private void moveMedia(DescriptionBase description, Media media, int direction){
 108                 Set<DescriptionElementBase> elements = description.getElements();
 109
 110                 if(elements.size() != 1){
 111                         MessagingUtils.error(this.getClass(), Messages.MoveMediaInListOperation_MORE_DESC, null);
 112                 }
 113
 114                 DescriptionElementBase element = elements.iterator().next();
 115
 116                 List<Media> medias = element.getMedia();
 117
 118                 int index = medias.indexOf(media);
 119                 int newIndex = index + direction;
 120
 121                 if(index < 0){
 122                         return;
 123                 }
 124
 125                 if (newIndex >= 0 && newIndex < medias.size()) {
 126                         try{
 127                                 Collections.swap(medias, newIndex, index);
 128                         }catch(ArrayIndexOutOfBoundsException e){
 129                                 MessagingUtils.error(this.getClass(), e);
 130                         }
 131                 }
 132         }
 133 }