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.molecular.Amplification;
  10 import eu.etaxonomy.cdm.model.molecular.Sequence;
  11 import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;
  12
  13 /**
  14  * Property tester used by the DerivateView tree menu.
  15  *
  16  */
  17 public class DerivateMenuPropertyTester extends PropertyTester {
  18
  19         private static final String IS_SPECIMEN_OR_OBSERVATION = "isSpecimenOrObservation";
  20
  21         /* (non-Javadoc)
  22          * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
  23          */
  24         /** {@inheritDoc} */
  25         @Override
  26     public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
  27             //TODO: these simple instanceof-checks can be unified in one class because there are several
  28             // PropertyTesters that do the same, that is just checking which class the selection is of
  29
  30             Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  31
  32                 if(selectedElements.length == 0){
  33                         // nothing selected so all tests should fail
  34                         return false;
  35                 }
  36
  37                 if(IS_SPECIMEN_OR_OBSERVATION.equals(property)){
  38                     return isSpecimenOrObservation(selectedElements);
  39                 }
  40                 else{
  41                         return false;
  42                 }
  43         }
  44
  45         private boolean isSpecimenOrObservation(Object[] selectedElements) {
  46             for (Object object : selectedElements){
  47                 if(!(object instanceof SpecimenOrObservationBase || object instanceof Amplification || object instanceof Sequence)){
  48                     return false;
  49                 }
  50             }
  51             return true;
  52         }
  53
  54 }