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Business Formulas can be used to define expressions and reuse them across logic documents.
You can add different types of expressions as Business Formulas.
- Formula: To write formulas
- Literal: To assign constants and literal formulas (without any parameters)
- Function: To assign a function with a list of expressions
- Native Method: To assign .NET native methods
- Embedded Model: To embed a document from the project
Formula expressions
We use formulas to store expressions with parameters.
Formula Expression Properties
- Business Formula: The type of the expression
- Expression: The expression you want to assign to the name
- Name: Name of the expression
- Parameters: The parameters used in the expression
Literal Expressions
Literals are used to store constant values or expressions that only contain literal values.
Literal Expressions Properties
- Business Formula: The type of the expression
- Expression: The expression you want to assign to the name
- Name: Name of the expression
- Type: Type of the formula’s expression result. Default is as the expression suggests or list as it will be translated to list.
Function expressions
Functions can store a set of expressions as one function.
Function Expressions Properties
- Business Formula: The type of the expression
- Expressions: The list of expressions you want to assign to the name
- Name: Name of the expression
- Parameters: The parameters used in the expressions
- Type: Type pf the formula’s expression result. Default is as an expression suggested or list as it will be translated into a list.
The expressions in a function will be executed according to the given order of expressions and the last expression’s output will be returned as the function’s output.
Native Methods
Native methods are used to define .NET type methods inside FlexRule.
You can add static methods from any .NET type.
Native Method Properties
- Business Formula: The type of the expression
- Name: Name of the expression
- Assembly: Assembly that has the type of implementation
- Method Signature: Signature of a static method of a type
- Type: Type of the native method
In the above figure, we use the method DateTime.DaysInMonth(Int32, Int32) .
Embedded Model
Embedded models are used to connect to an existing document such as a decision table.
For example, if you have a flow connecting to a REST API and you want to use this flow within a decision table, you can use an Embedded Model business formulas.
Embedded Model Properties
- Business Formulas: The expression you want to assign to the name
- Name: Name of the expression
- Logic Documents: The logic documents to be called
Business Formulas Sample Project
The attached project includes a set of examples for each expression type.