gistfile1.java

import griffon.presentation.Scaffold

class Book {
    String title
    String author
}

@Scaffold(Book)
class BookBeanModel {}

// @Scaffold AST xform generates
//class BookBeanModel extends AbstractBeanModel {
//    final Model title
//    final Model author
//
//    BookBeanModel() {
//        super(Book)
//        title = ModelUtils.makeModelFor(Book, this, 'title')
//        author = ModelUtils.makeModelFor(Book, this, 'author')
//    }
//
//    List<Model<?>> getModelAttributes() {
//       Arrays.asList(title, author)
//    }
// }
// Model classes are fully observable

Model model = new BookBeanModel()
assert !model.value
assert !model.title.value
assert !model.author.value

Book book = new Book(title: 'Title1', author: 'Author1')
model.value = book
assert model.title.value == book.title
assert model.author.value == book.author

model.title.value = 'Title Changed'
assert book.title == 'Title Changed'