Bug 214577 Support cube filter in chart
For chart consuming cube, need to support filtering on categories or series, possibly on values if time allows. The UI is similar to the filter dialog for cross tab, but there should be no measure or dimension concepts in chart's dialog.
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartCubeQueryHelper.java
* @return
	 */
	static String getMeasure( String expr ) throws DataException
	{
		if ( expr == null || !expr.matches( "\\Qmeasure[\"\\E.*\\Q\"]\\E" ) ) 
		{
			return null;
		}
		return expr.replaceFirst( "\\Qmeasure[\"\\E", "" ) 
				.replaceFirst( "\\Q\"]\\E", "" ); 
	}
	/**
	 * Return the binding name of data["binding"]
	 * 
	 * @param expr
	 */
	public static String getBindingName( String expr )
	{
		if ( !isBinding( expr ) )
			return null;
		return expr.replaceFirst( "\\Qdata[\"\\E", "" ) 
				.replaceFirst( "\\Q\"]\\E", "" ); 
	}
	static boolean isBinding( String expr )
	{
		if ( expr == null )
			return false;
		return expr.matches( "\\Qdata[\"\\E.*\\Q\"]\\E" ); 
	}
	static boolean isReferenceToDimLevel( String expr )