DANull

Overview

The DANull class defines a singleton object used to represent null values in the DADataTableRow values collection.

You do not have to use it directly. When you try to set a nil value for a field, the DANull value will be stored there. Also, if you try to obtain the value of a field that holds DANull, you will get back nil.

Location

• Reference: DANull.h
• Namespace: DataAbstract
• Ancestry: NSObject | DANull

Class Methods

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method that tests given value and returns YES if it is the NULL (otherwise returns NO)

+ (BOOL) isNullValue:(id)value

Parameters:

• value: value that should be tested

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An instance of the DANull class.

+ (DANull *) nullValue

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