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         private static final String TEST = "test";
  29
  30         /*
  31          * (non-Javadoc)
  32          *
  33          * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object,
  34          * java.lang.String, java.lang.Object[], java.lang.Object)
  35          */
  36         /** {@inheritDoc} */
  37         @Override
  38         public boolean test(Object receiver, String property, Object[] args,
  39                         Object expectedValue) {
  40
  41                 Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  42
  43                 if (selectedElements.length == 0 && property.equals(TEST)) {
  44                         // nothing selected so all tests should fail
  45                         return true;
  46                 }
  47                 if (selectedElements.length == 0 && COMPATIBLE.equals(property)) {
  48                         // nothing selected so all tests should fail
  49                         return true;
  50                 }
  51
  52                 if (COMPATIBLE.equals(property)) {
  53                         return isCompatible(selectedElements);
  54                 }
  55
  56
  57
  58
  59                 return false;
  60         }
  61
  62
  63
  64         /**
  65          * @param selectedElements
  66          * @return
  67          */
  68         private boolean isCompatible(Object[] selectedElements) {
  69
  70                 if (selectedElements.length == 0 ) {
  71                         // nothing selected so all tests should fail
  72                         return false;
  73                 }
  74                 for (Object object : selectedElements) {
  75
  76                         if (object instanceof CdmMetaDataAwareDataSourceContainer) {
  77                                 CdmMetaDataAwareDataSourceContainer container = (CdmMetaDataAwareDataSourceContainer) object;
  78                                 return container.isDataSourceCompatible();
  79                         }
  80                 }
  81                 return false;
  82
  83         }
  84 }