We can define dynamic properties in a class as follows:

Suppose we have injected a property named “UTCTimeInMills” in Date class which is of type “long”.
Now we need to enable syntax hinting for it, We can do it as follows:
(See inline comments for description)
[java]

//First we need to define a context
def dateContext = context(ctype: "java.util.Date") //ctype: takes the target class full name.

//Now we need to contribute the property to the class
contribute(dateContext) {

//name: Name of the method
//type: The type of the property, give full class name here or the keyword for native types
property(name: "UTCTimeInMills", type: ‘long’)

}

[/java]

Read Further in the “GDSL AWESOMENESS” Series

1. GDSL Awesomeness – Introduction to GDSL in IntelliJ Idea
2. GDSL Awesomeness – Understanding Context And Contributors in Detail
3. GDSL Awesomeness – Defining dynamic property in a class
4. GDSL Awesomeness – Defining dynamic method in a class
5. GDSL Awesomeness – Adding Hinting for missingMethod implementation
6. GDSL Awesomeness – Setting a global context
7. GDSL Awesomeness – Delegating Closure Calls
8. GDSL Awesomeness – Defining methods in a closure passed to method of particular name
9. GDSL Awesomeness – Defining Properties in a closure passed to method of particular name
10. GDSL Awesomeness – Contributing to classes which match a path/name pattern
11. GDSL Awesomeness – contributing methods with current class return types or parameters
12. GDSL Awesomeness – AutoComplete Script for grails-Mail-Plugin “sendMail” closure
13. GDSL Awesomeness – Getting Code of a method or Field in GDSL Script
14. GDSL Awesomeness – Advanced Example showing domain properties implementation

Hope it helps

Kushal Likhi