eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/TermTreePropertyTester.java

   1 /**
   2  *
   3  */
   4 package eu.etaxonomy.taxeditor.featuretree;
   5
   6 import org.eclipse.core.expressions.PropertyTester;
   7 import org.eclipse.jface.viewers.IStructuredSelection;
   8
   9 import eu.etaxonomy.cdm.model.term.TermTree;
  10
  11 /**
  12  * Property tester used by the feature tree menu.
  13  *
  14  * @author pplitzner
  15  * @since Jan 30, 2019
  16  *
  17  */
  18 public class TermTreePropertyTester extends PropertyTester {
  19
  20         private static final String FEATURE_TREE= "isFeatureTree"; //$NON-NLS-1$
  21
  22         @Override
  23     public boolean test(Object receiver, String property, Object[] args,
  24                         Object expectedValue) {
  25
  26             Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  27
  28             if(selectedElements.length == 0){
  29                         // nothing selected so all tests should fail
  30                         return false;
  31                 }
  32
  33                 if(FEATURE_TREE.equals(property)){
  34                     return isTermTree(selectedElements);
  35                 }
  36                 else{
  37                         return false;
  38                 }
  39         }
  40
  41         private boolean isTermTree(Object[] selectedElements) {
  42             for (Object object : selectedElements){
  43                 if(!(object instanceof TermTree)){
  44                     return false;
  45                 }
  46             }
  47             return true;
  48         }
  49
  50 }