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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.editor.view.media;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import org.eclipse.core.runtime.Assert;
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import org.eclipse.jface.viewers.ITreeContentProvider;
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import org.eclipse.jface.viewers.Viewer;
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import eu.etaxonomy.cdm.api.facade.DerivedUnitFacade;
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import eu.etaxonomy.cdm.api.facade.DerivedUnitFacadeNotSupportedException;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.model.description.DescriptionBase;
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import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
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import eu.etaxonomy.cdm.model.description.SpecimenDescription;
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import eu.etaxonomy.cdm.model.media.Media;
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import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;
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import eu.etaxonomy.cdm.model.occurrence.FieldUnit;
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import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationType;
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import eu.etaxonomy.cdm.model.taxon.Taxon;
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import eu.etaxonomy.taxeditor.editor.e4.TaxonEditorInputE4;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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/**
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* <p>MediaContentProvider class.</p>
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*
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* @author n.hoffmann
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* @created Jun 15, 2010
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*/
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public class MediaContentProvider implements ITreeContentProvider{
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private static final Object[] NO_CHILDREN = new Object[0];
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@Override
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public Object[] getChildren(Object parentElement) {
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if (parentElement instanceof TaxonEditorInputE4 || parentElement instanceof Taxon) {
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Taxon taxon = null;
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if (parentElement instanceof TaxonEditorInputE4){
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taxon = ((TaxonEditorInputE4) parentElement).getTaxon();
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} else{
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taxon = HibernateProxyHelper.deproxy(parentElement, Taxon.class);
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}
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if(taxon == null){
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MessagingUtils.error(getClass(), "Taxon is null", null); //$NON-NLS-1$
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return NO_CHILDREN;
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}
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HashSet<DescriptionBase<?>> imageGalleries = new HashSet<>();
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for(DescriptionBase<?> description : taxon.getDescriptions()){
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if(description.isImageGallery()){
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imageGalleries.add(description);
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}
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}
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return imageGalleries.toArray();
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}
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else if (parentElement instanceof DescriptionBase) {
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if (((DescriptionBase<?>) parentElement).isImageGallery()) {
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List<Media> images = getImages((DescriptionBase<?>) parentElement);
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if (images != null){
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return images.toArray();
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}
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return null;
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}
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}
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else if (parentElement instanceof DerivedUnit){
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try {
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DerivedUnitFacade facade = DerivedUnitFacade.NewInstance((DerivedUnit) parentElement);
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SpecimenDescription derivedUnitImageGallery = facade.getDerivedUnitImageGallery(false);
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if(derivedUnitImageGallery != null){
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return Collections.singleton(derivedUnitImageGallery).toArray();
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}
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} catch (DerivedUnitFacadeNotSupportedException e) {
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MessagingUtils.error(this.getClass(), "DerivedUnitFacadeNotSupportedException when trying to instantiate DerivedUnitFacade", e); //$NON-NLS-1$
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}
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}
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else if (parentElement instanceof FieldUnit){
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DerivedUnitFacade facade = DerivedUnitFacade.NewInstance(SpecimenOrObservationType.FieldUnit, (FieldUnit) parentElement);
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SpecimenDescription fieldObjectImageGallery = facade.getFieldObjectImageGallery(false);
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if(fieldObjectImageGallery != null){
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return Collections.singleton(fieldObjectImageGallery).toArray();
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}
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}
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return NO_CHILDREN;
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}
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@Override
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public Object getParent(Object element) {
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// TODO Auto-generated method stub
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return null;
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}
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@Override
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public boolean hasChildren(Object element) {
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if (getChildren(element)== null) {
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return false;
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}
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return (getChildren(element).length > 0);
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}
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@Override
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public Object[] getElements(Object inputElement) {
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return getChildren(inputElement);
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}
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@Override
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public void dispose() {}
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@Override
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public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
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private List<Media> getImages(DescriptionBase description){
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Assert.isTrue(description.isImageGallery(), "Description should have the imageGallery flag set."); //$NON-NLS-1$
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Set<DescriptionElementBase> elements = description.getElements();
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if (elements != null) {
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// by definition, image galleries have only one description element
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if(elements.size() > 1){
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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); //$NON-NLS-1$ //$NON-NLS-2$
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}
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if (!elements.isEmpty()){
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DescriptionElementBase element = elements.iterator().next();
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return element.getMedia();
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}
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}
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return null;
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}
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private SpecimenDescription createDerivedUnitFacadeImageGallery(DerivedUnitFacade facade){
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SpecimenDescription description = SpecimenDescription.NewInstance();
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description.setImageGallery(true);
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return description;
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}
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}
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