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.cdm.model.metadata.CdmMetaData.MetaDataPropertyName;
  17 import eu.etaxonomy.taxeditor.view.datasource.CdmMetaDataAwareDataSourceContainer;
  18
  19 /**
  20  * @author n.hoffmann
  21  * @created Sep 23, 2010
  22  * @version 1.0
  23  */
  24 public class DataSourceMenuPropertyTester extends PropertyTester {
  25
  26         private static final String COMPATIBLE = "isCompatible";
  27         private static final String TEST = "test";
  28         private static final String HAS_DATA_MODEL = "hasDataModel";
  29
  30         /** {@inheritDoc} */
  31         @Override
  32         public boolean test(Object receiver, String property, Object[] args,
  33                         Object expectedValue) {
  34
  35                 Object[] selectedElements = ((IStructuredSelection) receiver).toArray();
  36                 if (selectedElements.length == 0 && property.equals(TEST)) {
  37                         // nothing selected so all tests should fail
  38                         return true;
  39                 }
  40                 if (selectedElements.length == 0 && COMPATIBLE.equals(property)) {
  41                         // nothing selected so all tests should fail
  42                         return true;
  43                 }
  44
  45                 if (COMPATIBLE.equals(property)) {
  46                         return isCompatible(selectedElements);
  47                 }
  48                 if (HAS_DATA_MODEL.equals(property)) {
  49                     return hasDataModel(selectedElements);
  50                 }
  51                 return false;
  52         }
  53
  54            private boolean hasDataModel(Object[] selectedElements) {
  55
  56                 if (selectedElements.length == 0 ) {
  57                     // nothing selected so all tests should fail
  58                     return false;
  59                 }
  60                 for (Object object : selectedElements) {
  61
  62                     if (object instanceof CdmMetaDataAwareDataSourceContainer) {
  63                         CdmMetaDataAwareDataSourceContainer container = (CdmMetaDataAwareDataSourceContainer) object;
  64                         String schemaVersion = container.getMetaData(MetaDataPropertyName.DB_SCHEMA_VERSION);
  65                     return !schemaVersion.equals(CdmMetaDataAwareDataSourceContainer.DEFAULT_ENTRY);
  66                     }
  67                 }
  68                 return false;
  69
  70             }
  71
  72
  73         private boolean isCompatible(Object[] selectedElements) {
  74
  75                 if (selectedElements.length == 0 ) {
  76                         // nothing selected so all tests should fail
  77                         return false;
  78                 }
  79                 for (Object object : selectedElements) {
  80
  81                         if (object instanceof CdmMetaDataAwareDataSourceContainer) {
  82                                 CdmMetaDataAwareDataSourceContainer container = (CdmMetaDataAwareDataSourceContainer) object;
  83                                 return container.isDataSourceCompatible();
  84                         }
  85                 }
  86                 return false;
  87
  88         }
  89 }