=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElementService.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElementService.java	2009-11-07 14:09:00 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElementService.java	2009-11-10 15:53:07 +0000
@@ -29,6 +29,7 @@
 
 import java.util.Collection;
 import java.util.Map;
+import java.util.Set;
 
 import org.hisp.dhis.hierarchy.HierarchyViolationException;
 
@@ -229,6 +230,14 @@
      */
     Collection<DataElement> getDataElementsWithGroupSets();
     
+    /**
+     * Returns all DataElements which are associated with the given set of DataElementGroupSets.
+     * 
+     * @param groupSets the set of DataElementGroupSets.
+     * @return all DataElements which are associated with the given set of DataElementGroupSets.
+     */
+    Collection<DataElement> getDataElementsByGroupSets( Set<DataElementGroupSet> groupSets );
+    
     // -------------------------------------------------------------------------
     // Calculated Data Elements
     // -------------------------------------------------------------------------

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/dataelement/DefaultDataElementService.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/dataelement/DefaultDataElementService.java	2009-11-07 14:09:00 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/dataelement/DefaultDataElementService.java	2009-11-10 15:53:07 +0000
@@ -31,8 +31,10 @@
 import java.util.Collection;
 import java.util.Date;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Map;
+import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -264,6 +266,21 @@
         return dataElementStore.getDataElementsWithGroupSets();
     }
     
+    public Collection<DataElement> getDataElementsByGroupSets( Set<DataElementGroupSet> groupSets )
+    {
+        Collection<DataElement> dataElements = new HashSet<DataElement>();
+        
+        for ( DataElement dataElement : getDataElementsWithGroupSets() )
+        {
+            if ( dataElement.getGroupSets() != null && new HashSet<DataElementGroupSet>( dataElement.getGroupSets() ).equals( groupSets ) )
+            {
+                dataElements.add( dataElement );
+            }
+        }
+        
+        return dataElements;
+    }
+    
     // -------------------------------------------------------------------------
     // CalculatedDataElement
     // -------------------------------------------------------------------------

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/dimension/DefaultDimensionService.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/dimension/DefaultDimensionService.java	2009-11-10 15:17:51 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/dimension/DefaultDimensionService.java	2009-11-10 15:53:07 +0000
@@ -119,7 +119,7 @@
             {
                 Set<DataElementGroupSet> dimensionSet = getDataElementDimensionSet( getDimensionSetIdentifiers( identifier ) );
                 
-                // TODO return dataElementService.getDataElementsByDimensionSet( dimensionSet );
+                return dataElementService.getDataElementsByGroupSets( dimensionSet );
             }
         }
         

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/test/java/org/hisp/dhis/dataelement/DataElementServiceTest.java'
--- dhis-2/dhis-services/dhis-service-core/src/test/java/org/hisp/dhis/dataelement/DataElementServiceTest.java	2009-11-10 11:45:58 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/test/java/org/hisp/dhis/dataelement/DataElementServiceTest.java	2009-11-10 15:53:07 +0000
@@ -452,6 +452,41 @@
         assertEquals( 3, dataElementService.getDataElementsByType( DataElement.VALUE_TYPE_BOOL ).size() );
     }
 
+    @Test
+    public void testGetDataElementsByGroupSets()
+    {
+        DataElementGroupSet groupSetA = createDataElementGroupSet( 'A' );
+        DataElementGroupSet groupSetB = createDataElementGroupSet( 'B' );
+        
+        dataElementService.addDataElementGroupSet( groupSetA );
+        dataElementService.addDataElementGroupSet( groupSetB );
+        
+        DataElement dataElementA = createDataElement( 'A' );
+        DataElement dataElementB = createDataElement( 'B' );
+        DataElement dataElementC = createDataElement( 'C' );
+        DataElement dataElementD = createDataElement( 'D' );
+        
+        dataElementB.getGroupSets().add( groupSetA );
+        dataElementB.getGroupSets().add( groupSetB );
+        dataElementD.getGroupSets().add( groupSetA );
+        dataElementD.getGroupSets().add( groupSetB );
+        
+        dataElementService.addDataElement( dataElementA );
+        dataElementService.addDataElement( dataElementB );
+        dataElementService.addDataElement( dataElementC );
+        dataElementService.addDataElement( dataElementD );
+        
+        Set<DataElementGroupSet> groupSets = new HashSet<DataElementGroupSet>();
+        groupSets.add( groupSetA );
+        groupSets.add( groupSetB );
+        
+        Collection<DataElement> dataElements = dataElementService.getDataElementsByGroupSets( groupSets );
+        
+        assertEquals( 2, dataElements.size() );
+        assertTrue( dataElements.contains( dataElementB ) );
+        assertTrue( dataElements.contains( dataElementD ) );
+    }
+
     // -------------------------------------------------------------------------
     // CalculatedDataElements
     // -------------------------------------------------------------------------