taxeditor-store/src/main/java/eu/etaxonomy/taxeditor/view/datasource/handler/DataSourceMenuPropertyTester.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.view.datasource.handler;
  12
  13 import org.eclipse.core.expressions.PropertyTester;
  14 import org.eclipse.jface.viewers.IStructuredSelection;
  15
  16 import eu.etaxonomy.taxeditor.preference.IPreferenceKeys;
  17 import eu.etaxonomy.taxeditor.preference.PreferencesUtil;
  18 import eu.etaxonomy.taxeditor.view.datasource.CdmMetaDataAwareDataSourceContainer;
  19
  20 /**
  21  * <p>DataSourceMenuPropertyTester class.</p>
  22  *
  23  * @author n.hoffmann
  24  * @created Sep 23, 2010
  25  * @version 1.0
  26  */
  27 public class DataSourceMenuPropertyTester extends PropertyTester {
  28
  29         private static final String COMPATIBLE = "isCompatible";
  30
  31         /*
  32          * (non-Javadoc)
  33          *
  34          * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object,
  35          * java.lang.String, java.lang.Object[], java.lang.Object)
  36          */
  37         /** {@inheritDoc} */
  38         @Override
  39         public boolean test(Object receiver, String property, Object[] args,
  40                         Object expectedValue) {
  41
  42                 Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  43
  44                 if (selectedElements.length == 0) {
  45                         // nothing selected so all tests should fail
  46                         return false;
  47                 }
  48
  49                 if (COMPATIBLE.equals(property)) {
  50                         return isCompatible(selectedElements);
  51                 }
  52
  53
  54                 return false;
  55         }
  56
  57
  58
  59         /**
  60          * @param selectedElements
  61          * @return
  62          */
  63         private boolean isCompatible(Object[] selectedElements) {
  64                 for (Object object : selectedElements) {
  65
  66                         if (object instanceof CdmMetaDataAwareDataSourceContainer) {
  67                                 CdmMetaDataAwareDataSourceContainer container = (CdmMetaDataAwareDataSourceContainer) object;
  68                                 return container.isDataSourceCompatible();
  69                         }
  70                 }
  71                 return false;
  72         }
  73 }