AS3 AutoMapper gist.

gistfile1.as

class PersonModel {
	private var _firstName : String;
	private var _lastName : String;
	
	public function PersonModel(firstName : String, lastName : String) { 
		_firstName = firstName;
		_lastName = lastName;
	}
	
	public function get firstName() : String { 
		return _firstName;
	}
	
	public function get lastName() : String {
		return _lastName;
	}
}

class PersonDTO() {
	public fullName : String;
}

var daveModel = new PersonModel("Dave", "Chang");

// Rule for mapping PersonModel => PersonDTO.
Mapper.create(PersonModel, PersonDTO)()
	.forMember("fullName", function(source : PersonModel) : String { 
		return source.firstName + " " + source.lastName;
	});
	
var daveDTO : DTO = Mapper.map(daveModel, PersonDTO);
trace(daveDTO.firstName); // "Dave Chang".

// Rule for mapping PersonDTO => PersonModel
Mapper.create(PersonDTO, PersonModel)()
	.forConstructor(function (source : PersonDTO) : PersonModel) {
		var nameParts = source.split(" ");
		return new PersonModel(nameParts.shift(), nameParts.join(" "));
	});
	
var resultModel = Mapper.map(daveDTO, PersonModel);
trace(resultModel.firstName); // "Dave".
trace(resultModel.lastName); // "Chang".