Conditionally required rule

The conditionally required rule builder has the following additional properties:

Property	Description
expression	An expression using the attribute aliases. If • “x” is alias for the attribute with ID=“NUMBER_ATTRIBUTE_ID” • “y” is alias for the attribute with ID=”UNIT_ATTRIBUTE_ID” then the following kind of expressions are possible: `"x == y"` `"x == \"No\" and y == \"Yes\""` `"x != \"3\" or not y == \"5\""` Supported operators are `==, !=, and, or, not` IMPORTANT*: Values must be encoded as strings in expression!
aliases	A list of variable names that are used in expressions in place of attribute IDs. Aliases must be valid groovy variable names
conditional attribute	The attribute that is required to be non-empty when expression evaluates to true
error message	The error message that will show up in PDX UI if condition is true, but conditional attribute was not set to a value

Code Example:

BusinessRule rule = BusinessRuleBuilder.conditionallyRequiredRule("RULE_ID")
    .withAlias("x", "NUMBER_ATTRIBUTE_ID")
    .withAlias("y", "UNIT_ATTRIBUTE_ID")
    .withExpression("x == \"100\" and y == \"units\"")
    .withConditionallyRequiredAttribute("PER_HUNDRED_INFO_ID")
    .withErrorMessage("When quantity is set to 100 units, then 'Info per 100' is required")
    .build();

This produces the following JSON output when rule is serialized:

{
  "id": "RULE_ID",
  "templateId": "conditionallyRequired",
  "errorMessage": "When quantity is set to 100 units, then 'Info per 100' is required",
  "namedAttributes": {
    "x": "NUMBER_ATTRIBUTE_ID",
    "y": "UNIT_ATTRIBUTE_ID"
  },
  "parameters": {
    "expression": "x == \"100\" and y == \"units\"",
    "conditionalAttribute": "PER_HUNDRED_INFO_ID"
  },
  "requiredContexts": [],
  "execution": "CONTINUOUS",
  "businessRuleScopes": [],
  "staticProperties": {}
}