eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/datasource/handler/DataSourceMenuPropertyTester.java

   1 /**
   2  * Copyright (C) 2007 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9
  10 package eu.etaxonomy.taxeditor.view.datasource.handler;
  11
  12 import org.eclipse.core.expressions.PropertyTester;
  13 import org.eclipse.jface.viewers.IStructuredSelection;
  14
  15 import eu.etaxonomy.cdm.model.metadata.CdmMetaData.MetaDataPropertyName;
  16 import eu.etaxonomy.taxeditor.view.datasource.CdmMetaDataAwareDataSourceContainer;
  17
  18 /**
  19  * @author n.hoffmann
  20  * @created Sep 23, 2010
  21  * @version 1.0
  22  */
  23 public class DataSourceMenuPropertyTester extends PropertyTester {
  24
  25         private static final String COMPATIBLE = "isCompatible";
  26         private static final String TEST = "test";
  27         private static final String HAS_DATA_MODEL = "hasDataModel";
  28
  29         /** {@inheritDoc} */
  30         @Override
  31         public boolean test(Object receiver, String property, Object[] args,
  32                         Object expectedValue) {
  33
  34                 Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  35                 if (selectedElements.length == 0 && property.equals(TEST)) {
  36                         // nothing selected so all tests should fail
  37                         return true;
  38                 }
  39                 if (selectedElements.length == 0 && COMPATIBLE.equals(property)) {
  40                         // nothing selected so all tests should fail
  41                         return true;
  42                 }
  43
  44                 if (COMPATIBLE.equals(property)) {
  45                         return isCompatible(selectedElements);
  46                 }
  47                 if (HAS_DATA_MODEL.equals(property)) {
  48                     return hasDataModel(selectedElements);
  49                 }
  50                 return false;
  51         }
  52
  53            private boolean hasDataModel(Object[] selectedElements) {
  54
  55                 if (selectedElements.length == 0 ) {
  56                     // nothing selected so all tests should fail
  57                     return false;
  58                 }
  59                 for (Object object : selectedElements) {
  60
  61                     if (object instanceof CdmMetaDataAwareDataSourceContainer) {
  62                         CdmMetaDataAwareDataSourceContainer container = (CdmMetaDataAwareDataSourceContainer) object;
  63                         String schemaVersion = container.getMetaData(MetaDataPropertyName.DB_SCHEMA_VERSION);
  64                     return !schemaVersion.equals(CdmMetaDataAwareDataSourceContainer.DEFAULT_ENTRY);
  65                     }
  66                 }
  67                 return false;
  68
  69             }
  70
  71
  72         private boolean isCompatible(Object[] selectedElements) {
  73
  74                 if (selectedElements.length == 0 ) {
  75                         // nothing selected so all tests should fail
  76                         return false;
  77                 }
  78                 for (Object object : selectedElements) {
  79
  80                         if (object instanceof CdmMetaDataAwareDataSourceContainer) {
  81                                 CdmMetaDataAwareDataSourceContainer container = (CdmMetaDataAwareDataSourceContainer) object;
  82                                 return container.isDataSourceCompatible();
  83                         }
  84                 }
  85                 return false;
  86
  87         }
  88 }