public interface TaskInputExpression

Task Input Expressions

In some tasks, the input to the task needs to be passed to a service being called by the task, to a user-visible form, or other consumers of the input data. A TaskInputExpression can be used to do this declaratively.

A TaskInputExpression is a String prefixed with either "$input" or "$inputRecord", followed by an optional dot-separated hierarchical path, which can specify either an atomic data value (String, Number) or Record from the input data. For example, if the Process.state represented in JSON were:

  {
     orderId:5,
     orderItems: [
        {name:"Pencils", quantity:3, itemId:2344}
     ],
     orderUser: { name:"Henry Winkle", address:"...", ... }
  }
  

.. and a task specified an inputField of "orderId" and an inputFieldList of "orderItems","orderUser", then:

• $input is the value 5
• $inputRecord.orderUser.name is "Henry Winkle"
• $inputRecord.orderItems[0] is the first orderItems Record ({name:"Pencils", ... })