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