Regular Expression Activity

Returns the number of matches for the regular expression pattern on the entity property value.

Target parameters (in) and Activity options

Source parameters (out)

Example

Another example 

As a developer you might want to validate user entered values in a field. Such as email addresses so it does not include faulty characters, and that the structure of the email looks correct. 

You can use the "Regular Expression" to do this. We can look at this example below: 

In my workflow that edits one of my entities called "Customer" I have a field called email. When a user has edit this value I want to check that the values are correct. 

Regular Expression 

• Place "Regular Expression Activity" after the dialog view in the process
• Make sure that the newly added activity is before the "Commit"
•  
• Bind the entity to the regular expression 
• 
• Click on "Regular Expression" 
  • Select the email property 
  • Paste this the value below into the "Pattern"
  • (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])
• 

Adjust the "Commit"

• Add a criteria on incoming branch to the "Commit" activity.
• [MatchCount] = 1 
• If the entered value matches our pattern/expression and the workflow will commit

Show a waring message if value is faulty 

• Drag a "Show message Box" and drop it on the "Regular Expression" activity. 
• 
• Edit some informational text into the Message Box. 
• 
• Add an additional branch, by pressing "Add Branch"
• Select the "Dialog View" (Edit) as "Sourcestep"
• 
• Save the workflow and verify that the newly added function works as supposed.