eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/MediaContentProvider.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;
  11
  12 import java.util.Collections;
  13 import java.util.HashSet;
  14 import java.util.List;
  15 import java.util.Set;
  16
  17 import org.eclipse.core.runtime.Assert;
  18 import org.eclipse.jface.viewers.ITreeContentProvider;
  19 import org.eclipse.jface.viewers.Viewer;
  20
  21 import eu.etaxonomy.cdm.api.facade.DerivedUnitFacade;
  22 import eu.etaxonomy.cdm.api.facade.DerivedUnitFacadeNotSupportedException;
  23 import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
  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.occurrence.FieldUnit;
  30 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationType;
  31 import eu.etaxonomy.cdm.model.taxon.Taxon;
  32 import eu.etaxonomy.taxeditor.editor.e4.TaxonEditorInputE4;
  33 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  34
  35 /**
  36  * <p>MediaContentProvider class.</p>
  37  *
  38  * @author n.hoffmann
  39  * @created Jun 15, 2010
  40  */
  41 public class MediaContentProvider implements ITreeContentProvider{
  42
  43         private static final Object[] NO_CHILDREN = new Object[0];
  44
  45         /** {@inheritDoc} */
  46         @Override
  47     public Object[] getChildren(Object parentElement) {
  48
  49                 if (parentElement instanceof TaxonEditorInputE4 || parentElement instanceof Taxon) {
  50
  51                         Taxon taxon = null;
  52                         if (parentElement instanceof TaxonEditorInputE4){
  53                                 taxon = ((TaxonEditorInputE4) parentElement).getTaxon();
  54                         } else{
  55                                 taxon = HibernateProxyHelper.deproxy(parentElement, Taxon.class);
  56                         }
  57
  58                         if(taxon == null){
  59                                 MessagingUtils.error(getClass(), "Taxon is null", null); //$NON-NLS-1$
  60                                 return NO_CHILDREN;
  61                         }
  62                         HashSet<DescriptionBase<?>> imageGalleries = new HashSet<>();
  63                         for(DescriptionBase<?> description : taxon.getDescriptions()){
  64                                 if(description.isImageGallery()){
  65                                         imageGalleries.add(description);
  66                                 }
  67                         }
  68                         return imageGalleries.toArray();
  69                 }
  70                 else if (parentElement instanceof DescriptionBase) {
  71                         if (((DescriptionBase<?>) parentElement).isImageGallery()) {
  72                                 List<Media> images =  getImages((DescriptionBase<?>) parentElement);
  73                                 if (images != null){
  74                                         return images.toArray();
  75                                 }
  76                                 return null;
  77
  78                         }
  79                 }
  80                 else if (parentElement instanceof DerivedUnit){
  81                         try {
  82                                 DerivedUnitFacade facade = DerivedUnitFacade.NewInstance((DerivedUnit) parentElement);
  83
  84                                 SpecimenDescription derivedUnitImageGallery = facade.getDerivedUnitImageGallery(false);
  85
  86                                 if(derivedUnitImageGallery != null){
  87                                         return Collections.singleton(derivedUnitImageGallery).toArray();
  88                                 }
  89
  90                         } catch (DerivedUnitFacadeNotSupportedException e) {
  91                                 MessagingUtils.error(this.getClass(), "DerivedUnitFacadeNotSupportedException when trying to instantiate DerivedUnitFacade", e); //$NON-NLS-1$
  92                         }
  93                 }
  94                 else if (parentElement instanceof FieldUnit){
  95                         DerivedUnitFacade facade = DerivedUnitFacade.NewInstance(SpecimenOrObservationType.FieldUnit, (FieldUnit) parentElement);
  96
  97                         SpecimenDescription fieldObjectImageGallery = facade.getFieldObjectImageGallery(false);
  98
  99                         if(fieldObjectImageGallery != null){
 100                             return Collections.singleton(fieldObjectImageGallery).toArray();
 101                         }
 102                 }
 103                 return NO_CHILDREN;
 104         }
 105
 106         /** {@inheritDoc} */
 107         @Override
 108     public Object getParent(Object element) {
 109                 // TODO Auto-generated method stub
 110                 return null;
 111         }
 112
 113         /** {@inheritDoc} */
 114         @Override
 115     public boolean hasChildren(Object element) {
 116                 if (getChildren(element)== null) {
 117                         return false;
 118                 }
 119                 return (getChildren(element).length > 0);
 120         }
 121
 122         /** {@inheritDoc} */
 123         @Override
 124     public Object[] getElements(Object inputElement) {
 125                 return getChildren(inputElement);
 126         }
 127
 128         /**
 129          * <p>dispose</p>
 130          */
 131         @Override
 132     public void dispose() {}
 133
 134         /** {@inheritDoc} */
 135         @Override
 136     public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
 137
 138         private List<Media> getImages(DescriptionBase description){
 139                 Assert.isTrue(description.isImageGallery(), "Description should have the imageGallery flag set."); //$NON-NLS-1$
 140
 141                 Set<DescriptionElementBase> elements = description.getElements();
 142                 if (elements != null) {
 143                         // by definition, image galleries have only one description element
 144                         if(elements.size() > 1){
 145                                 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); //$NON-NLS-1$ //$NON-NLS-2$
 146                         }
 147                         if (!elements.isEmpty()){
 148                                 DescriptionElementBase element = elements.iterator().next();
 149                                 return element.getMedia();
 150                         }
 151
 152
 153                 }
 154                 return null;
 155         }
 156
 157         private SpecimenDescription createDerivedUnitFacadeImageGallery(DerivedUnitFacade facade){
 158                 SpecimenDescription description = SpecimenDescription.NewInstance();
 159                 description.setImageGallery(true);
 160
 161
 162
 163                 return description;
 164         }
 165 }