JsonLogic

public final class JsonLogic

It parses json rule strings and executes the rules on provided data.

  • It parses the string containing a json logic and caches the result for reuse. All calls to applyRule() will use the same parsed rule.

    Throws

    • JSONLogicError.canNotParseJSONRule If The jsonRule could not be parsed, possible the syntax is invalid
    • ParseError.UnimplementedExpressionFor(_ operator: String) : If you pass an json logic operation that is not currently implemented
    • ParseError.GenericError(String) : An error occurred during parsing of the rule

    Declaration

    Swift

    public convenience init(_ jsonRule: String) throws

    Parameters

    jsonRule

    A valid json rule string

  • It parses the string containing a json logic and caches the result for reuse. All calls to applyRule() will use the same parsed rule.

    Throws

    • JSONLogicError.canNotParseJSONRule If The jsonRule could not be parsed, possible the syntax is invalid
    • ParseError.UnimplementedExpressionFor(_ operator: String) : If you pass an json logic operation that is not currently implemented
    • ParseError.GenericError(String) : An error occurred during parsing of the rule

    Declaration

    Swift

    public init(_ jsonRule: String, customOperators: [String : (JsonForJsonLogic?) -> JsonForJsonLogic]?) throws

    Parameters

    jsonRule

    A valid json rule string
    customOperators

    custom operations that will be used during evalution

  • It applies the rule, you can optionally pass data to be used for the rule.

    Throws

    • JSONLogicError.canNotConvertResultToType(Any.Type) : When the result from the calculation can not be converted to the return type //This throws JSONLogicError.canNotConvertResultToType(Double) let r: Double = JsonLogic(“{ ”===“ : [1, 1] }”).applyRule()
    • JSONLogicError.canNotParseJSONData(String) : If jsonDataOrNil is not valid json

    Declaration

    Swift

    public func applyRule<T>(to jsonDataOrNil: String? = nil) throws -> T

    Parameters

    jsonDataOrNil

    Data for the rule to operate on