Official | HULFT IoT EdgeStreaming Mapper Reference, 2nd Edition, (April 1, 2022):

Types of Mapper logic

Mapper logic is a function that can perform basic arithmetic, character substitution, and other various conversion and processing operations on values.

The types of Mapper logic are Loop, Condition, Number, Date, String, and Array.

= Remarks =

Mapper icon

When you place a Mapper logic on the mapping canvas of the Mapper editor, a connecting line appears to the left of the icon. This line is called an "input handler."

Example:

The upper connecting line is the "first input handler," and the lower connecting line is the "second input handler."

You can define the input data by connecting input schema elements, variables, or other Mapper logic to this connecting line.

For some logics, you can increase the number of connecting lines when you change the properties.

For details about how to use Mapper logic, refer to How to use Mapper logic.

Loop

Conditional loop

Icon	Logic Name	Function
	If Loop	This logic loops and outputs the items that match the conditions.

Condition

Boolean

Icon	Logic Name	Function
	And operation	This logic returns the logical conjunction (AND condition) of two input booleans.
	Or operation	This logic returns the logical disjunction (OR condition) between two input booleans.
	Not operation	This logic returns the negation (NOT condition) between two input booleans.
	Boolean constant	This logic outputs the boolean constant.
	Check null	This logic determines whether the input value is null.

Number

Icon	Logic Name	Function
	Equal	This logic determines whether two input numbers are equal.
	Not equal	This logic determines whether two input numbers differ.
	Less than	This logic determines whether the input value of the first input handler is smaller than the input value of the second input handler.
	Less than or equal	This logic determines whether the input value of the first input handler is equal to or lower than the input value of the second input handler.
	Greater than	This logic determines whether the input value of the first input handler is larger than the input value of the second input handler.
	Greater than or equal	This logic determines whether the input value of the first input handler is equal to or higher than the input value of the second input handler.

String

Icon	Logic Name	Function
	Equal	This logic determines whether two input strings are equal.
	Not equal	This logic determines whether two input strings differ.
	Start with	This logic determines whether the input string starts with the specified string.
	End with	This logic determines whether the input string ends with the specified string.
	Contain	This logic determines whether the input string contains the specified string.
	Match to regular expression	This logic determines whether the input string matches the specified regular expression.

Number

Basic

Icon	Logic Name	Function
	Numeric constant (integer)	This logic outputs the numeric constant (integer).
	Numeric constant (floating point)	This logic outputs the numeric constant (floating point).
	To Integer	This logic converts the input values into integers.
	Convert to floating point	This logic converts the input values into floating point values.
	Increment	This logic outputs the value incremented from 0.

Calculation

Icon	Logic Name	Function
	Add	This logic adds the input value of the second input handler to the input value of the first input handler and returns the result.
	Subtract	This logic subtracts the input value of the second input handler from the input value of the first input handler and returns the result.
	Multiply	This logic multiplies the input value of the first input handler by the input value of the second input handler and returns the result.
	Divide	This logic divides the input value of the first input handler by the input value of the second input handler and returns the result.
	Remainder	This logic divides the input value of the first input handler by the input value of the second input handler and returns the remainder.

Function

Icon	Logic Name	Function
	Ceiling	This logic rounds up the input numerical value to the nearest integer.
	Floor	This logic rounds down to the nearest integer of the input numerical value. If the input numerical value is a negative value, the output numerical value is the largest value less than or equal to the input numerical value.
	Floor (precision)	This logic rounds the input numeric value down according to the specified precision. If the input numerical value is a negative value, the output numerical value is the largest value less than or equal to the specified number of digits.
	Fraction processing	This logic rounds down to the fractional point of the input value. If the input numerical value is a negative value, this logic rounds down to the nearest integer.
	Rounding	This logic rounds the input numeric value.
	Rounding (precision)	This logic rounds the input numeric value according to the specified precision.
	Absolute value	This logic returns the absolute value of the input numerical value.
	Power	This logic raises the input numerical value to the power of the specified value.
	Bit length	This logic returns the bit length of the input character string.
	String length	This logic returns number of characters of the input character string.

Date

Icon	Logic Name	Function
	Get year	This logic gets the year from the input date and time.
	Get month	This logic gets the month from the input date and time.
	Get day	This logic gets the day from the input date and time.
	Get hour	This logic gets the hour from the input date and time.
	Get minute	This logic gets the minutes from the input date and time.
	Get second	This logic gets the seconds from the input date and time.
	Get day of the week	This logic gets the day of the week from the input date and time.

Set

Icon	Logic Name	Function
	Average	This logic outputs the average of the array.

Date

Basic

Icon	Logic Name	Function
	UNIX time	This logic outputs the Unix time.
	Current date/time (UTC)	This logic gets the current date and time based on Universal Time Coordinated (UTC).
	Current date/time (OS time zone)	This logic gets the current date and time based on the time zone of the OS running Runtime.

Calculation

Icon	Logic Name	Function
	Parse of date/time(Standard format)	This logic outputs the input string as date and time according to the selected layout.
	Parse of date/time(Custom)	This logic outputs the input string as date and time according to the specified layout.
	Increases or decreases hour	This logic increases or decreases the hour of the input date and time and returns the date and time value.
	Increases or decreases minute	This logic increases or decreases the minutes of the input date and time and returns the date and time value.
	Increases or decreases second	This logic increases or decreases the seconds of the input date and time and returns the date and time value.

String

Basic

Icon	Logic Name	Function
	String constant	This logic outputs a single-line string constant.
	Convert to string	This logic converts the input values to character strings.

Calculation

Icon	Logic Name	Function
	Concatenate	This logic joins multiple input strings.
	Zero padding	This logic pads the input value with zeros up to the specified number of digits and outputs the result as a string.
	Left String	This logic returns the specified number of bytes of string from the left of the input string.
	Right String	This logic returns the specified number of bytes of string from the right of the input string.
	Middle String	This logic returns the specified number of bytes of string from the specified start location of the input string.

Date

Icon	Logic Name	Function
	Date/Time formatting(Standard format)	This logic formats the date and time to the selected format.
	Date/Time formatting(Custom)	This logic formats the date and time to the specified format.

Array

Basic

Icon	Logic Name	Function
	Add	This logic adds all the specified elements to the array.
	Add (maximum size adjustment)	This logic adds all the specified elements to the array. Values are deleted starting from the oldest value if the maximum size is exceeded.

Official | HULFT IoT EdgeStreaming Mapper Reference, 2nd Edition, (April 1, 2022):