eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/derivate/DerivateMenuPropertyTester.java

   1 /**
   2  *
   3  */
   4 package eu.etaxonomy.taxeditor.editor.view.derivate;
   5
   6 import org.eclipse.core.expressions.PropertyTester;
   7 import org.eclipse.jface.viewers.IStructuredSelection;
   8
   9 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
  10
  11 /**
  12  * Property tester used by the DerivateView tree menu.
  13  *
  14  */
  15 public class DerivateMenuPropertyTester extends PropertyTester {
  16
  17         private static final String IS_SPECIMEN_OR_OBSERVATION = "isSpecimenOrObservation";
  18
  19         /* (non-Javadoc)
  20          * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
  21          */
  22         /** {@inheritDoc} */
  23         @Override
  24     public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
  25             //TODO: these simple instanceof-checks can be unified in one class because there are several
  26             // PropertyTesters that do the same, that is just checking which class the selection is of
  27
  28             Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  29
  30                 if(selectedElements.length == 0){
  31                         // nothing selected so all tests should fail
  32                         return false;
  33                 }
  34
  35                 if(IS_SPECIMEN_OR_OBSERVATION.equals(property)){
  36                     return isSpecimenOrObservation(selectedElements);
  37                 }
  38                 else{
  39                         return false;
  40                 }
  41         }
  42
  43         private boolean isSpecimenOrObservation(Object[] selectedElements) {
  44             for (Object object : selectedElements){
  45                 if(!(object instanceof SpecimenOrObservationBase)){
  46                     return false;
  47                 }
  48             }
  49             return true;
  50         }
  51
  52 }