Bug 312859 The list of operator for Chart filter does not provide 30 visible items
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/dialogs/ChartCubeFilterConditionBuilder.java
* @param name
	 */
	public static String getValueForOperator( String name )
	{
		for ( int i = 0; i < OPERATOR.length; i++ )
		{
			if ( OPERATOR[i][0].equals( name ) )
			{
				return OPERATOR[i][1];
			}
		}
		return null;
	}
	/**
	 * Returns how many value fields this operator needs.
	 * 
	 * @param operatorValue
	 */
	public static int determineValueVisible( String operatorValue )
	{
		if ( DesignChoiceConstants.FILTER_OPERATOR_ANY.equals( operatorValue )
				|| DesignChoiceConstants.FILTER_OPERATOR_FALSE.equals( operatorValue )
				|| DesignChoiceConstants.FILTER_OPERATOR_TRUE.equals( operatorValue )
				|| DesignChoiceConstants.FILTER_OPERATOR_NULL.equals( operatorValue )
				|| DesignChoiceConstants.FILTER_OPERATOR_NOT_NULL.equals( operatorValue ) )
		{
			return 0;
		}
		else if ( DesignChoiceConstants.FILTER_OPERATOR_LT.equals( operatorValue )
				|| DesignChoiceConstants.FILTER_OPERATOR_LE.equals( operatorValue )