OCLinEcore and Regex to create valid IPv4 string
问题 I have an Ecore model, where I'm trying to add some OCL constraints. My problem comes when I try to make a property (a string) that is in valid IPv4 form. I guess I should use a regular expression, but I have no idea at all about how to use regex on OCLinEcore. 回答1: As of Eclipse Juno, you can use regular expressions in OCL. The function to call on it is matches(regex), just like in Java. context Packet inv ValidIPv4 : ip.matches('\b([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\b')