eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/MediaContentProvider.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.taxeditor.editor.view.media;
  12
  13 import java.util.ArrayList;
  14 import java.util.HashSet;
  15 import java.util.List;
  16 import java.util.Set;
  17
  18 import org.eclipse.core.runtime.Assert;
  19 import org.eclipse.jface.viewers.ITreeContentProvider;
  20 import org.eclipse.jface.viewers.Viewer;
  21
  22 import eu.etaxonomy.cdm.api.facade.DerivedUnitFacade;
  23 import eu.etaxonomy.cdm.api.facade.DerivedUnitFacadeNotSupportedException;
  24 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  25 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  26 import eu.etaxonomy.cdm.model.description.SpecimenDescription;
  27 import eu.etaxonomy.cdm.model.media.Media;
  28 import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;
  29 import eu.etaxonomy.cdm.model.taxon.Taxon;
  30 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  31 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  32
  33 /**
  34  * <p>MediaContentProvider class.</p>
  35  *
  36  * @author n.hoffmann
  37  * @created Jun 15, 2010
  38  * @version 1.0
  39  */
  40 public class MediaContentProvider implements ITreeContentProvider{
  41
  42         private static final Object[] NO_CHILDREN = new Object[0];
  43
  44         /** {@inheritDoc} */
  45         public Object[] getChildren(Object parentElement) {
  46
  47                 if (parentElement instanceof TaxonEditorInput) {
  48                         Taxon taxon = ((TaxonEditorInput) parentElement).getTaxon();
  49                         if(taxon == null){
  50                                 MessagingUtils.error(getClass(), "Taxon is null", null);
  51                                 return NO_CHILDREN;
  52                         }
  53                         HashSet<DescriptionBase> imageGalleries = new HashSet<DescriptionBase>();
  54                         for(DescriptionBase description : taxon.getDescriptions()){
  55                                 if(description.isImageGallery()){
  56                                         imageGalleries.add(description);
  57                                 }
  58                         }
  59                         return imageGalleries.toArray();
  60                 }
  61                 else if (parentElement instanceof DescriptionBase) {
  62                         if (((DescriptionBase) parentElement).isImageGallery()) {
  63                                 return getImages((DescriptionBase) parentElement).toArray();
  64                         }
  65                 }
  66                 else if (parentElement instanceof DerivedUnit){
  67                         try {
  68                                 DerivedUnitFacade facade = DerivedUnitFacade.NewInstance((DerivedUnit) parentElement);
  69
  70                                 // TODO at the moment we always create image galleries because the facade is like so.
  71                                 // this should definitely change and we want to use normal getters and setters here
  72                                 List<DescriptionBase> derivedUnitFacadeImageGalleries = new ArrayList<DescriptionBase>(2);
  73
  74                                 SpecimenDescription derivedUnitImageGallery = facade.getDerivedUnitImageGallery(false);
  75                                 SpecimenDescription fieldObjectImageGallery = facade.getFieldObjectImageGallery(false);
  76
  77                                 if(derivedUnitImageGallery != null){
  78                                         derivedUnitFacadeImageGalleries.add(derivedUnitImageGallery);
  79                                 }
  80
  81                                 if(fieldObjectImageGallery != null){
  82                                         derivedUnitFacadeImageGalleries.add(fieldObjectImageGallery);
  83                                 }
  84
  85                                 return derivedUnitFacadeImageGalleries.toArray();
  86
  87                         } catch (DerivedUnitFacadeNotSupportedException e) {
  88                                 MessagingUtils.error(this.getClass(), "DerivedUnitFacadeNotSupportedException when trying to instantiate DerivedUnitFacade", e);
  89                         }
  90                 }
  91
  92                 return NO_CHILDREN;
  93         }
  94
  95         /** {@inheritDoc} */
  96         public Object getParent(Object element) {
  97                 // TODO Auto-generated method stub
  98                 return null;
  99         }
 100
 101         /** {@inheritDoc} */
 102         public boolean hasChildren(Object element) {
 103                 return (getChildren(element).length > 0);
 104         }
 105
 106         /** {@inheritDoc} */
 107         public Object[] getElements(Object inputElement) {
 108                 return getChildren(inputElement);
 109         }
 110
 111         /**
 112          * <p>dispose</p>
 113          */
 114         public void dispose() {}
 115
 116         /** {@inheritDoc} */
 117         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
 118
 119         private List<Media> getImages(DescriptionBase description){
 120                 Assert.isTrue(description.isImageGallery(), "Description should have the imageGallery flag set.");
 121
 122                 Set<DescriptionElementBase> elements = description.getElements();
 123                 if (elements != null) {
 124                         // by definition, image galleries have only one description element
 125                         if(elements.size() > 1){
 126                                 MessagingUtils.error(this.getClass(), "There should be one and only one description element to hold the images. Found: " + elements.size() + " InDescription ID: " + description.getUuid(), null);
 127                         }
 128
 129                         DescriptionElementBase element = elements.iterator().next();
 130
 131                         return element.getMedia();
 132                 }
 133                 return null;
 134         }
 135
 136         private SpecimenDescription createDerivedUnitFacadeImageGallery(DerivedUnitFacade facade){
 137                 SpecimenDescription description = SpecimenDescription.NewInstance();
 138                 description.setImageGallery(true);
 139
 140
 141
 142                 return description;
 143         }
 144 }