The Router statement contains one or more Option statements and can contain one Default statement. When the Data Processor transformation performs a Router statement, it tests each Option nested below the Router statement.
The first Option statement that matches is performed. The Option statement can contain one or more child statements of any type. If no Option statement matches, the Default statement is performed. If there is no Default statement, the Router statement fails.
You can configure multiple Option statements in the same Router group. The Data Processor transformation performs the first Option statement that it accepts. The Data Processor transformation does not perform any Option statement below it in the group. When the Data Processor transformation does not accept an Option statement, it tests the next Option statement.
When the transformation does not accept any Option statement and there is no Default statement, the Router statement fails. If the Option statement has a condition that is true but the mapping statements inside it fail and propagates the failure, the Router fails. You can configure the mapping to skip the Router if the Router fails.
If a Router contains no Option statement but does contain a Default statement, then the Default statement is always performed.
Router Statement Example
An XMap contains a repeating group under the context of Employee. The first child statement in the group is a Router statement. The Router statement has one Option statement. The Option statement contains a condition that checks if the value of Role is equal to the value of Manager. If the role equals manager, the Option statement evaluates to true. The mapping evaluates the Run XMap statement nested under the Option statement. The Data Processor transformation calls the EmployeeToWorker XMap to map elements to Manager.
If the role is not equal to manager, the Default statement is true. The mapping evaluates the next statement for the Default option. The default mapping statement calls EmployeeToWorker XMap to map the elements to Worker.
The following figure shows the Router statement with an Option statement and a Default statement: