Expression

The Expression class has two key properties:

• expression: The actual script code (stored as text)

• engineName: The scripting language to use ("javascript" or "python")

Purpose of Expressions in the Campaign Process

Expressions serve as dynamic eligibility filters that determine which clients should be included in a campaign. This provides several important benefits:

1. Dynamic Client Selection: Rather than hardcoding client criteria in the application, expressions allow for flexible, rule-based selection that can be changed without code modifications.

2. Business User Control: Marketing teams can create and modify campaign targeting criteria without requiring developer intervention.

3. Scripting Flexibility: Supporting both JavaScript and Python gives users options based on their preference or specific needs.

How Expressions Are Used

1. During Campaign Setup: When creating a campaign, administrators define an expression that represents eligibility criteria (e.g., client.creditScore > 700 && client.income > 50000)

2. During Execution: When the campaign executes:

   • The system retrieves potential client data

   • Passes each client through the script engine along with the expression

   • The expression evaluates to true or false for each client

   • Only clients that evaluate to true are included in the execution

3. Application Creation: After filtering, applications are created only for the eligible clients

This approach allows for precise targeting of clients based on complex criteria that can be easily modified between campaigns.