Bug 179737 The MeasureHandle should be able to provide data type info
We are now allow user input expression as measure expression. However this brings difficulties in determine the data type of a measure expression evaluation result. We need MeasureHandle to be enhanced to include the data type info. Please note that data type "any" is not accepted.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/olap/MeasureHandle.java
implements
			IMeasureModel
{
	/**
	 * Constructs a handle for the given design and design element. The
	 * application generally does not create handles directly. Instead, it uses
	 * one of the navigation methods available on other element handles.
	 * 
	 * @param module
	 *            the module
	 * @param element
	 *            the model representation of the element
	 */
	public MeasureHandle( Module module, DesignElement element )
	{
		super( module, element );
	}
	/**
	 * Gets the function defined in this measure.
	 * 
	 * @return function for this measure
	 */
	public String getFunction( )
	{
		return getStringProperty( FUNCTION_PROP );