Bug 207120 Please model provide an API for data type conversion.
Currently, there're two data types: column data type and parameter data type. But they're inconsistent. Could model provide APIs for conversion between the two types. Thanks. In addition: please check the code into head and 2.2.1 branch, because we have a 2.2.1 bug to fix.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleUtil.java
*/
	public static boolean isListFilterValue( FilterConditionHandle filter )
	{
		if ( filter == null )
			return false;
		if ( DesignChoiceConstants.FILTER_OPERATOR_IN.equals( filter
				.getOperator( ) ) )
			return true;
		return false;
	}
	/**
	 * Determine if the value1 of this filter condition is a list.
	 * 
	 * @param filter
	 *            the filter need to check
	 * @return true if the value1 value is a list, false if it is a single
	 *         value.
	 * 
	 */
	public static boolean isListFilterValue( FilterConditionElementHandle filter )
	{
		if ( filter == null )
			return false;
		if ( DesignChoiceConstants.FILTER_OPERATOR_IN.equals( filter
				.getOperator( ) ) )
			return true;
		return false;
	}
}