[GROOVY-6484] Provide an AST that creates a "fluent builder" for an immutable class - ASF JIRA

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When working in Java, I've been using an Eclipse plugin to generate a builder for an immutable class with final fields in it.

The "fluent builder" is known at least from the Effective Java 2nd ed. book by Joshua Bloch .

I'd like to have an AST that creates a "fluent builder" for an immutable class.

For Groovy I'd prefer something like this for the syntax.

Example of the class:

@Immutable
@FluentBuilder
class Person {
   String firstName
   String lastName
}

The AST would generated a public inner class Person.Builder with setters, fluent property methods and a build method.

Examples of code using the builder support:

def person = new Person.Builder().with {
    firstName = 'John'
    lastName = 'Doe'
}.build()

def person = new Person.Builder().firstName('John').lastName('Doe').build()

def person = new Person.Builder([firstName: 'John', lastName: 'Doe').build()

relates to

GROOVY-6604 PojoBuilder New Feature Proposal