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.Collections;
  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.hibernate.HibernateProxyHelper;
  25 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  26 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  27 import eu.etaxonomy.cdm.model.description.SpecimenDescription;
  28 import eu.etaxonomy.cdm.model.media.Media;
  29 import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;
  30 import eu.etaxonomy.cdm.model.occurrence.FieldUnit;
  31 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationType;
  32 import eu.etaxonomy.cdm.model.taxon.Taxon;
  33 import eu.etaxonomy.taxeditor.bulkeditor.BulkEditor;
  34 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  35 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  36
  37 /**
  38  * <p>MediaContentProvider class.</p>
  39  *
  40  * @author n.hoffmann
  41  * @created Jun 15, 2010
  42  * @version 1.0
  43  */
  44 public class MediaContentProvider implements ITreeContentProvider{
  45
  46         private static final Object[] NO_CHILDREN = new Object[0];
  47
  48         /** {@inheritDoc} */
  49         @Override
  50     public Object[] getChildren(Object parentElement) {
  51
  52                 if (parentElement instanceof TaxonEditorInput || parentElement instanceof Taxon) {
  53
  54                         Taxon taxon = null;
  55                         if (parentElement instanceof TaxonEditorInput){
  56                                 taxon = ((TaxonEditorInput) parentElement).getTaxon();
  57                         } else{
  58                                 taxon = HibernateProxyHelper.deproxy(parentElement, Taxon.class);
  59                         }
  60
  61                         if(taxon == null){
  62                                 MessagingUtils.error(getClass(), "Taxon is null", null);
  63                                 return NO_CHILDREN;
  64                         }
  65                         HashSet<DescriptionBase> imageGalleries = new HashSet<DescriptionBase>();
  66                         for(DescriptionBase description : taxon.getDescriptions()){
  67                                 if(description.isImageGallery()){
  68                                         imageGalleries.add(description);
  69                                 }
  70                         }
  71                         return imageGalleries.toArray();
  72                 }
  73                 else if (parentElement instanceof DescriptionBase) {
  74                         if (((DescriptionBase) parentElement).isImageGallery()) {
  75                                 List<Media> images =  getImages((DescriptionBase) parentElement);
  76                                 if (images != null){
  77                                         return images.toArray();
  78                                 }
  79                                 return null;
  80
  81                         }
  82                 }
  83                 else if (parentElement instanceof DerivedUnit){
  84                         try {
  85                                 DerivedUnitFacade facade = DerivedUnitFacade.NewInstance((DerivedUnit) parentElement);
  86
  87                                 SpecimenDescription derivedUnitImageGallery = facade.getDerivedUnitImageGallery(false);
  88
  89                                 if(derivedUnitImageGallery != null){
  90                                         return Collections.singleton(derivedUnitImageGallery).toArray();
  91                                 }
  92
  93                         } catch (DerivedUnitFacadeNotSupportedException e) {
  94                                 MessagingUtils.error(this.getClass(), "DerivedUnitFacadeNotSupportedException when trying to instantiate DerivedUnitFacade", e);
  95                         }
  96                 }
  97                 else if (parentElement instanceof FieldUnit){
  98                         DerivedUnitFacade facade = DerivedUnitFacade.NewInstance(SpecimenOrObservationType.FieldUnit, (FieldUnit) parentElement);
  99
 100                         SpecimenDescription fieldObjectImageGallery = facade.getFieldObjectImageGallery(false);
 101
 102                         if(fieldObjectImageGallery != null){
 103                             return Collections.singleton(fieldObjectImageGallery).toArray();
 104                         }
 105                 }
 106                 return NO_CHILDREN;
 107         }
 108
 109         /** {@inheritDoc} */
 110         @Override
 111     public Object getParent(Object element) {
 112                 // TODO Auto-generated method stub
 113                 return null;
 114         }
 115
 116         /** {@inheritDoc} */
 117         @Override
 118     public boolean hasChildren(Object element) {
 119                 if (getChildren(element)== null) {
 120                         return false;
 121                 }
 122                 return (getChildren(element).length > 0);
 123         }
 124
 125         /** {@inheritDoc} */
 126         @Override
 127     public Object[] getElements(Object inputElement) {
 128                 return getChildren(inputElement);
 129         }
 130
 131         /**
 132          * <p>dispose</p>
 133          */
 134         @Override
 135     public void dispose() {}
 136
 137         /** {@inheritDoc} */
 138         @Override
 139     public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
 140
 141         private List<Media> getImages(DescriptionBase description){
 142                 Assert.isTrue(description.isImageGallery(), "Description should have the imageGallery flag set.");
 143
 144                 Set<DescriptionElementBase> elements = description.getElements();
 145                 if (elements != null) {
 146                         // by definition, image galleries have only one description element
 147                         if(elements.size() > 1){
 148                                 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);
 149                         }
 150                         if (!elements.isEmpty()){
 151                                 DescriptionElementBase element = elements.iterator().next();
 152                                 return element.getMedia();
 153                         }
 154
 155
 156                 }
 157                 return null;
 158         }
 159
 160         private SpecimenDescription createDerivedUnitFacadeImageGallery(DerivedUnitFacade facade){
 161                 SpecimenDescription description = SpecimenDescription.NewInstance();
 162                 description.setImageGallery(true);
 163
 164
 165
 166                 return description;
 167         }
 168 }