=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/aggregation/AggregationService.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/aggregation/AggregationService.java	2011-01-25 20:50:16 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/aggregation/AggregationService.java	2011-03-16 20:50:40 +0000
@@ -30,6 +30,7 @@
 import java.util.Date;
 
 import org.hisp.dhis.dataelement.DataElement;
+import org.hisp.dhis.dataelement.DataElementCategoryOption;
 import org.hisp.dhis.dataelement.DataElementCategoryOptionCombo;
 import org.hisp.dhis.indicator.Indicator;
 import org.hisp.dhis.organisationunit.OrganisationUnit;
@@ -58,6 +59,21 @@
         OrganisationUnit organisationUnit );
 
     /**
+     * Calculates the aggregated value based on the aggregation operator defined
+     * in the given dataelement.
+     * 
+     * @param dataElement the DataElement to aggregate over.
+     * @param categoryOption the DataElementCategoryOption to aggregate over.
+     * @param startDate the start date of the aggregation period.
+     * @param endDate the end date of the aggregation period.
+     * @param organisationUnit the OrganisationUnit to aggregate over.
+     * @return the aggregated value or null if no values are found.
+     * @throws AggregationStoreException
+     */
+    Double getAggregatedDataValue( DataElement dataElement, Date startDate, Date endDate, OrganisationUnit organisationUnit, 
+        DataElementCategoryOption categoryOption );
+    
+    /**
      * Calculates the aggregated value of the given indicator.
      * 
      * @param indicator the Indicator to aggregate over.

=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElementCategoryCombo.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElementCategoryCombo.java	2011-02-15 13:50:33 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/dataelement/DataElementCategoryCombo.java	2011-03-16 20:50:40 +0000
@@ -102,6 +102,16 @@
         
         return categoryOptions;
     }
+
+    public boolean doTotal()
+    {
+        return optionCombos != null && optionCombos.size() > 1;
+    }
+    
+    public boolean doSubTotals()
+    {
+        return categories != null && categories.size() > 1;
+    }
     
     // -------------------------------------------------------------------------
     // hashCode, equals and toString

=== modified file 'dhis-2/dhis-services/dhis-service-aggregationengine-default/src/main/java/org/hisp/dhis/aggregation/impl/DefaultAggregationService.java'
--- dhis-2/dhis-services/dhis-service-aggregationengine-default/src/main/java/org/hisp/dhis/aggregation/impl/DefaultAggregationService.java	2010-07-10 14:50:48 +0000
+++ dhis-2/dhis-services/dhis-service-aggregationengine-default/src/main/java/org/hisp/dhis/aggregation/impl/DefaultAggregationService.java	2011-03-16 20:50:40 +0000
@@ -27,17 +27,22 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
 import org.hisp.dhis.aggregation.AggregationService;
 import org.hisp.dhis.aggregation.impl.cache.AggregationCache;
 import org.hisp.dhis.aggregation.impl.dataelement.AbstractDataElementAggregation;
 import org.hisp.dhis.aggregation.impl.indicator.IndicatorAggregation;
 import org.hisp.dhis.dataelement.DataElement;
+import org.hisp.dhis.dataelement.DataElementCategoryOption;
 import org.hisp.dhis.dataelement.DataElementCategoryOptionCombo;
 import org.hisp.dhis.indicator.Indicator;
 import org.hisp.dhis.organisationunit.OrganisationUnit;
 import static org.hisp.dhis.system.util.DateUtils.*;
+import static org.hisp.dhis.system.util.MathUtils.getAverage;
+import static org.hisp.dhis.system.util.MathUtils.getSum;
 
 import static org.hisp.dhis.dataelement.DataElement.*;
 
@@ -114,6 +119,18 @@
         return dataElementAggregation.getAggregatedValue( dataElement, optionCombo, startDate, endDate, organisationUnit );
     }
 
+    public Double getAggregatedDataValue( DataElement dataElement, Date startDate, Date endDate, OrganisationUnit organisationUnit, DataElementCategoryOption categoryOption )
+    {
+        final List<Double> values = new ArrayList<Double>();
+        
+        for ( DataElementCategoryOptionCombo optionCombo : categoryOption.getCategoryOptionCombos() )
+        {
+            values.add( getAggregatedDataValue( dataElement, optionCombo, startDate, endDate, organisationUnit ) );
+        }
+        
+        return dataElement.getAggregationOperator().equals( AGGREGATION_OPERATOR_SUM ) ? getSum( values ) : getAverage( values );
+    }
+    
     // -------------------------------------------------------------------------
     // Indicator
     // -------------------------------------------------------------------------

=== modified file 'dhis-2/dhis-services/dhis-service-aggregationengine-default/src/main/java/org/hisp/dhis/aggregation/impl/dataelement/AbstractDataElementAggregation.java'
--- dhis-2/dhis-services/dhis-service-aggregationengine-default/src/main/java/org/hisp/dhis/aggregation/impl/dataelement/AbstractDataElementAggregation.java	2010-07-10 15:19:02 +0000
+++ dhis-2/dhis-services/dhis-service-aggregationengine-default/src/main/java/org/hisp/dhis/aggregation/impl/dataelement/AbstractDataElementAggregation.java	2011-03-16 20:50:40 +0000
@@ -80,8 +80,7 @@
      * @param aggregationEndDate End date
      * @param organisationUnit The organisationUnit
      */
-    public abstract Double getAggregatedValue( DataElement dataElement, DataElementCategoryOptionCombo optionCombo, Date startDate, Date endDate,
-        OrganisationUnit organisationUnit );
+    public abstract Double getAggregatedValue( DataElement dataElement, DataElementCategoryOptionCombo optionCombo, Date startDate, Date endDate, OrganisationUnit organisationUnit );
     
     /**
      * Retrieves the datavalues registered for the given dataelement 

=== modified file 'dhis-2/dhis-services/dhis-service-importexport/src/test/java/org/hisp/dhis/importexport/dxf2/service/DataValueSetServiceTest.java'
--- dhis-2/dhis-services/dhis-service-importexport/src/test/java/org/hisp/dhis/importexport/dxf2/service/DataValueSetServiceTest.java	2011-02-25 18:08:38 +0000
+++ dhis-2/dhis-services/dhis-service-importexport/src/test/java/org/hisp/dhis/importexport/dxf2/service/DataValueSetServiceTest.java	2011-03-16 20:50:40 +0000
@@ -27,7 +27,10 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-import static junit.framework.Assert.*;
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertNull;
+import static junit.framework.Assert.assertTrue;
+import static junit.framework.Assert.fail;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -53,7 +56,6 @@
 import org.hisp.dhis.importexport.ImportService;
 import org.hisp.dhis.importexport.ImportStrategy;
 import org.hisp.dhis.importexport.dxf2.model.DataValueSet;
-import org.hisp.dhis.importexport.dxf2.service.DataValueSetService;
 import org.hisp.dhis.importexport.util.ImportExportUtils;
 import org.hisp.dhis.period.WeeklyPeriodType;
 import org.junit.Ignore;

=== modified file 'dhis-2/dhis-support/dhis-support-system/src/main/java/org/hisp/dhis/system/util/MathUtils.java'
--- dhis-2/dhis-support/dhis-support-system/src/main/java/org/hisp/dhis/system/util/MathUtils.java	2011-02-04 21:33:00 +0000
+++ dhis-2/dhis-support/dhis-support-system/src/main/java/org/hisp/dhis/system/util/MathUtils.java	2011-03-16 20:50:40 +0000
@@ -29,6 +29,7 @@
 
 import java.math.BigDecimal;
 import java.math.MathContext;
+import java.util.List;
 import java.util.Random;
 import java.util.regex.Pattern;
 
@@ -267,4 +268,35 @@
         
         return max;
     }
+    
+    /**
+     * Returns the average of the given values.
+     * 
+     * @param values the values.
+     * @return the average.
+     */
+    public static Double getAverage( List<Double> values )
+    {
+        Double sum = getSum( values );
+        
+        return sum / values.size();
+    }
+    
+    /**
+     * Returns the sum of the given values.
+     * 
+     * @param values the values.
+     * @return the sum.
+     */
+    public static Double getSum( List<Double> values )
+    {
+        Double sum = 0.0;
+        
+        for ( Double value : values )
+        {
+            sum += value;
+        }
+        
+        return sum;
+    }
 }

=== modified file 'dhis-2/dhis-support/dhis-support-system/src/test/java/org/hisp/dhis/system/util/MathUtilsTest.java'
--- dhis-2/dhis-support/dhis-support-system/src/test/java/org/hisp/dhis/system/util/MathUtilsTest.java	2011-02-04 21:33:00 +0000
+++ dhis-2/dhis-support/dhis-support-system/src/test/java/org/hisp/dhis/system/util/MathUtilsTest.java	2011-03-16 20:50:40 +0000
@@ -30,8 +30,15 @@
 import static junit.framework.Assert.assertEquals;
 import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertTrue;
+import static org.hisp.dhis.expression.Operator.equal_to;
+import static org.hisp.dhis.expression.Operator.greater_than;
+import static org.hisp.dhis.expression.Operator.greater_than_or_equal_to;
+import static org.hisp.dhis.expression.Operator.less_than;
+import static org.hisp.dhis.expression.Operator.less_than_or_equal_to;
+import static org.hisp.dhis.expression.Operator.not_equal_to;
 import static org.hisp.dhis.system.util.MathUtils.expressionIsTrue;
-import static org.hisp.dhis.expression.Operator.*;
+
+import java.util.Arrays;
 
 import org.junit.Test;
 
@@ -105,4 +112,10 @@
         assertFalse( MathUtils.isNumeric( " " ) );
         assertFalse( MathUtils.isNumeric( null ) );
     }
+    
+    @Test
+    public void testGetAverage()
+    {
+        assertEquals( 7.5, MathUtils.getAverage( Arrays.asList( 5.0, 5.0, 10.0, 10.0 ) ) );
+    }
 }