How closure is working in grails in GORM

Question

I was reading grails criteria API , I find the following code in grails API here

     def c = Account.createCriteria()
     def results = c {
         projections {
             groupProperty("branch")
         }
         like("holderFirstName", "Fred%")
         and {
             between("balance", 500, 1000)
             eq("branch", "London")
         }
         maxResults(10)
         order("holderLastName", "desc")
     }

my question is calling Account.createCriteria() will gives you grails.orm.HibernateCriteriaBuilder object but when say "c { ....}" , I know colsure is getting called but the object we have is HibernateCriteriaBuilder object not the Closure object , then how the closure is getting called .

Answer 1

As stated in the API this wraps the Hibernate Criteria API in a builder. Builders are used in Groovy to create Domain Specific Languages (DSLs) such as the GORM DSL.