taxeditor-navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/navigator/SynonymContentProvider.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.navigation.navigator;
  12
  13 import java.util.ArrayList;
  14 import java.util.List;
  15
  16 import org.apache.log4j.Logger;
  17 import org.eclipse.jface.viewers.ITreeContentProvider;
  18 import org.eclipse.jface.viewers.Viewer;
  19
  20 import eu.etaxonomy.cdm.model.taxon.Synonym;
  21 import eu.etaxonomy.cdm.model.taxon.Taxon;
  22 import eu.etaxonomy.cdm.model.taxon.TaxonBase;
  23 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  24
  25 /**
  26  * <p>SynonymContentProvider class.</p>
  27  *
  28  * @author p.ciardelli
  29  * @created 02.06.2009
  30  * @version 1.0
  31  */
  32 public class SynonymContentProvider implements ITreeContentProvider {
  33         private static final Logger logger = Logger
  34                         .getLogger(SynonymContentProvider.class);
  35
  36         private static final Object[] NO_CHILDREN = new Object[0];
  37
  38         /** {@inheritDoc} */
  39         public Object[] getChildren(Object parentElement) {
  40                 Object[] children = null;
  41                 if (parentElement instanceof Synonym) {
  42                         children = NO_CHILDREN;
  43                 } else if (parentElement instanceof TaxonNode) {
  44                         List<TaxonBase> list = new ArrayList<TaxonBase>();
  45
  46                         Taxon taxon = ((TaxonNode) parentElement).getTaxon();
  47
  48                         for (TaxonBase taxonBase : new IterableSynonymyList(taxon)) {
  49                                 if (taxonBase instanceof Synonym) {
  50                                         list.add(taxonBase);
  51                                 }
  52                         }
  53                         children = list.toArray();
  54                 }
  55                 return children != null ? children : NO_CHILDREN;
  56         }
  57
  58         /** {@inheritDoc} */
  59         public Object getParent(Object element) {
  60                 return null;
  61         }
  62
  63         /** {@inheritDoc} */
  64         public boolean hasChildren(Object element) {
  65                 return this.getChildren(element).length > 0;
  66         }
  67
  68         /** {@inheritDoc} */
  69         public Object[] getElements(Object inputElement) {
  70                 return this.getChildren(inputElement);
  71         }
  72
  73         /**
  74          * <p>dispose</p>
  75          */
  76         public void dispose() {
  77         }
  78
  79         /** {@inheritDoc} */
  80         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  81         }
  82 }