Bug 213663 [2.2.2][2.3.0]Exception occurs when preview a datetime type data with highlight rule
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/api/DataAdapterUtil.java
*/
	private static void registerFilterOperator( )
	{
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_EQ,
				new Integer( IConditionalExpression.OP_EQ ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_NE,
				new Integer( IConditionalExpression.OP_NE ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_LT,
				new Integer( IConditionalExpression.OP_LT ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_LE,
				new Integer( IConditionalExpression.OP_LE ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_GE,
				new Integer( IConditionalExpression.OP_GE ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_GT,
				new Integer( IConditionalExpression.OP_GT ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_BETWEEN,
				new Integer( IConditionalExpression.OP_BETWEEN ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_NOT_BETWEEN,
				new Integer( IConditionalExpression.OP_NOT_BETWEEN ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_NULL,
				new Integer( IConditionalExpression.OP_NULL ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_NOT_NULL,
				new Integer( IConditionalExpression.OP_NOT_NULL ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_TRUE,
				new Integer( IConditionalExpression.OP_TRUE ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_FALSE,
				new Integer( IConditionalExpression.OP_FALSE ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_LIKE,
				new Integer( IConditionalExpression.OP_LIKE ) );
		filterOptMap.put( DesignChoiceConstants.FILTER_OPERATOR_TOP_N,