Module map 

Map Function Module

Data transformation via JSONLogic expressions. Each mapping evaluates a compiled JSONLogic rule against the message’s context (OwnedDataValue) and assigns the result to a path. The result type is OwnedDataValue — no serde_json::Value intermediate.

Features

• JSONLogic-driven transformations
• Dot-path target paths with auto-creation
• Root-field merge semantics for data / metadata / temp_data
• Null results skip assignment by default (“set or keep”); on_null: "unset" removes the path instead
• unset: true removes a path outright
• mode: "append" / "extend" add to an array in place
• Audit-trail change tracking

Structs

MapConfig

Configuration for the map function containing a list of mappings.

MapMapping

A single mapping that transforms and assigns data — or, with unset, removes it.

Enums

MapMode

How a MapMapping writes a non-null result to its path.

OnNull

What a MapMapping does when its logic evaluates to null.