Simple evaluation
Description
The Simple evaluation action evaluates contents or value of a variable or a field in the result stream.
Connect two actions with the output of the Simple Evaluation.
The green (success) hop will be called if the condition was evaluated successfully, the red (failure) one will be called if the condition wasn’t evaluated successfully.
Usage
A Null value is the same as an empty string. For example, to detect a null for any data type, set the Type to String, and the Success condition to "If value is equal to", and have the Value textbox empty.
The Simple evaluation Action is limited. For more complex conditions see: https://hop.apache.org/manual/latest/workflow/actions/eval.html
Options
Action name
The name of the workflow action.
Source
Evaluate
Evaluation type: field or variable.
Field name
The field to evaluate
Type
Data type.
Success On
Success condition
If value equal to
If value different from
If value contains
If value not contains
If value starts with
If value not starts with
If value ends with
If value not ends with
If value valid regex
If value in list
If value not in list
Value
The value to compare.
Tips
Evaluating a variable
Source: Evaluate
Variable
Select this to evaluate a variable set before
Source: Variable name
e. g. ${VAR1}
Enter the variable name using the usual syntax
Source: Type
String, Number etc.
The type of your variable
Success on: Success when variable set
When this option is selected, the true path is followed when the variable is set. Note: The workflow action checks if the variable is defined, so an empty or null value is also true. When testing this within Hop you need to delete the line with the variable in the variables section of the Execute a workflow window. And remember: Once this variable is set, the variable keeps existing, even when deleting it from the list.
Success On: Success condition
Equal/Non equal/etc.
Select the condition to be met for a successful result
Success On: Value
Value to compare the variable to
Evaluating a field
Source: Evaluate
Field from previous result
Select this to evaluate a field value (generated by a pipeline using Copy rows to result)
Source: Field name
Enter the field name from the result row
Source: Type
String, Number etc.
The type of your field
Success On: Success condition
Equal/Non equal/etc.
Select the condition to be met for a successful result
Success On: Value
Value to compare the field to
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