public class InitializerStrategy
extends BuilderASTTransformationAbstractBuilderStrategy

This strategy is used with the Builder AST transform to create a builder helper class for the fluent and type-safe creation of instances of a specified class. It is modelled roughly on the design outlined here: http://michid.wordpress.com/2008/08/13/type-safe-builder-pattern-in-java/ You define classes which use the type-safe initializer pattern as follows:

 import groovy.transform.builder.*
 import groovy.transform.*

 @ToString
 @Builder(builderStrategy=InitializerStrategy) class Person {
     String firstName
     String lastName
     int age
 }
 

 @CompileStatic
 def main() {
     println new Person(Person.createInitializer().firstName("John").lastName("Smith").age(21))
 }
 

 Person(John, Smith, 21)
 

 println new Person(Person.createInitializer().firstName("John").lastName("Smith"))
 

 [Static type checking] - Cannot find matching method Person#<init>(Person$PersonInitializer <groovy.transform.builder.InitializerStrategy$SET, groovy.transform.builder.InitializerStrategy$SET, groovy.transform.builder.InitializerStrategy$UNSET>). Please check if the declared type is correct and if the method exists.