The case node

Evaluates a series of lambda expressions in a top down manner.

• The node will output / add the corresponding value of the first lambda expression that evaluates as true.
• If none of the lambda expressions evaluate as true, a default value will be used

The case node works in a similar way CASE expressions in SQL work.

Example

|case(
    lambda: "data.condition.name" == 'OK',
    lambda: "data.condition.name" == 'Warning',
    lambda: "data.condition.name" == 'Error'
)
.values(
    '{"cond": "Everything OK!"}',
    '{"cond": "Oh, oh, a Warning!"}',
    '{"cond": "Damn, Error!"}'
)
.json()
.as('data')
.default('{"cond": "Nothing matched!!!"}')

Parameters

Parameter	Description	Default
[node] lambdas( lambda_list )	list of lambda expressions
values( string_list\|text_list )	corresponding values
json( is_set )	if set, will treat the values and default parameters as json strings	false, not set
as (string)	field-path for the output value
default(any)	default value to use, if no case clause matches