=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java	2011-06-29 15:25:19 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/expression/ExpressionService.java	2011-07-01 07:37:16 +0000
@@ -34,6 +34,7 @@
 import org.hisp.dhis.dataelement.DataElement;
 import org.hisp.dhis.dataelement.DataElementCategoryOptionCombo;
 import org.hisp.dhis.dataelement.DataElementOperand;
+import org.hisp.dhis.indicator.Indicator;
 import org.hisp.dhis.organisationunit.OrganisationUnit;
 import org.hisp.dhis.period.Period;
 
@@ -217,4 +218,13 @@
      * @param days The number to be substituted with the days expression in the formula.
      */
     String generateExpression( String expression, Map<DataElementOperand, Double> valueMap, Map<Integer, Double> constantMap, Integer days );
+    
+    /**
+     * Returns all Operands included in the formulas for the given collection of
+     * Indicators. Requires that the explodedNumerator and explodedDenominator
+     * properties have been populated.
+     * 
+     * @param indicators the collection of Indicators.
+     */
+    Set<DataElementOperand> getOperandsInIndicators( Collection<Indicator> indicators );
 }

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java	2011-06-29 15:25:19 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/expression/DefaultExpressionService.java	2011-07-01 07:37:16 +0000
@@ -54,6 +54,7 @@
 import org.hisp.dhis.dataelement.DataElementOperand;
 import org.hisp.dhis.dataelement.DataElementService;
 import org.hisp.dhis.datavalue.DataValueService;
+import org.hisp.dhis.indicator.Indicator;
 import org.hisp.dhis.organisationunit.OrganisationUnit;
 import org.hisp.dhis.period.Period;
 import org.hisp.dhis.system.util.MathUtils;
@@ -567,6 +568,22 @@
 
         return buffer != null ? buffer.toString() : null;
     }
+
+    public Set<DataElementOperand> getOperandsInIndicators( Collection<Indicator> indicators )
+    {
+        final Set<DataElementOperand> operands = new HashSet<DataElementOperand>();
+        
+        for ( Indicator indicator : indicators )
+        {
+            Set<DataElementOperand> temp = getOperandsInExpression( indicator.getExplodedNumerator() );
+            operands.addAll( temp != null ? temp : new HashSet<DataElementOperand>() );
+            
+            temp = getOperandsInExpression( indicator.getExplodedDenominator() );            
+            operands.addAll( temp != null ? temp : new HashSet<DataElementOperand>() );
+        }
+        
+        return operands;
+    }
     
     private static final String stripConstantExpression( String match )
     {

=== modified file 'dhis-2/dhis-services/dhis-service-datamart-default/src/main/java/org/hisp/dhis/datamart/engine/DefaultDataMartEngine.java'
--- dhis-2/dhis-services/dhis-service-datamart-default/src/main/java/org/hisp/dhis/datamart/engine/DefaultDataMartEngine.java	2011-07-01 07:12:30 +0000
+++ dhis-2/dhis-services/dhis-service-datamart-default/src/main/java/org/hisp/dhis/datamart/engine/DefaultDataMartEngine.java	2011-07-01 07:37:16 +0000
@@ -176,7 +176,7 @@
         // ---------------------------------------------------------------------
         
         Collection<DataElementOperand> dataElementOperands = categoryService.getOperands( dataElements );
-        List<DataElementOperand> indicatorOperands = new ArrayList<DataElementOperand>( categoryService.populateOperands( getOperandsInIndicators( indicators ) ) );
+        List<DataElementOperand> indicatorOperands = new ArrayList<DataElementOperand>( categoryService.populateOperands( expressionService.getOperandsInIndicators( indicators ) ) );
         
         Set<DataElementOperand> allOperands = new HashSet<DataElementOperand>();
         allOperands.addAll( dataElementOperands );
@@ -294,24 +294,4 @@
 
         clock.logTime( "Data mart export process completed" );
     }
-
-    // -------------------------------------------------------------------------
-    // Supportive methods
-    // -------------------------------------------------------------------------
-
-    private Set<DataElementOperand> getOperandsInIndicators( Collection<Indicator> indicators )
-    {
-        final Set<DataElementOperand> operands = new HashSet<DataElementOperand>();
-        
-        for ( Indicator indicator : indicators )
-        {
-            Set<DataElementOperand> temp = expressionService.getOperandsInExpression( indicator.getExplodedNumerator() );
-            operands.addAll( temp != null ? temp : new HashSet<DataElementOperand>() );
-            
-            temp = expressionService.getOperandsInExpression( indicator.getExplodedDenominator() );            
-            operands.addAll( temp != null ? temp : new HashSet<DataElementOperand>() );
-        }
-        
-        return operands;
-    }
 }