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