Bug 195607 NPE is thrown when calling DimensionHandle:: getAbsoluteValue()
If a DimensionHandle did not set DimensionValue, NPE will thrown when calling DimensionHandle:: getAbsoluteValue().
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/FontSizeValueHandler.java
*/
	DimensionValue getAbsoluteValueForFontSize(
			DimensionValue relativeDimensionValue )
	{
		assert relativeDimensionValue != null;
		assert !CSSLengthValueHandler.isAbsoluteUnit( relativeDimensionValue
				.getUnits( ) );
		
		DesignElementHandle containerHandle = dimensionHandle
				.getElementHandle( ).getContainer( );
		DimensionHandle dimensionHandleFromContainer = containerHandle
				.getDimensionProperty( dimensionHandle.getPropertyDefn( )
						.getName( ) );
		DimensionValue absoluteValueFromContainer = null;
		if ( dimensionHandleFromContainer != null )
		{
			absoluteValueFromContainer = dimensionHandleFromContainer
					.getAbsoluteValue( );
			assert absoluteValueFromContainer != null;
		}
		else
		{
			absoluteValueFromContainer = defaultFontSizeValue;
		}
		DimensionValue absoluteDimensionValue = computeRelativeValue(
				absoluteValueFromContainer, relativeDimensionValue );
		assert ( isAbsoluteUnit( absoluteDimensionValue.getUnits( ) ) );
		return absoluteDimensionValue;
	}
}