PacktLib: Groovy for Domain-Specific Languages

Groovy for Domain-Specific Languages

About the Author

About the Reviewers

Introduction to DSL and Groovy

DSL: New name for an old idea

Groovy Quick Start

How to find and install Groovy

Groovy IDE and editor integration

Introducing the Groovy Language

Groovy Closures

What is a closure

Closures and collection methods

Closures as method parameters

Calling closures

Finding a named closure field

Closure parameters

Closure return values

Example DSL: GeeTwitter

Working with the Twitter APIs

Groovy improvements

Removing boilerplate

Adding a command-line interface

Adding built-in methods

Power Groovy DSL features

Named parameters

Method pointers

Metaprogramming and the Groovy MOP

How Builders work

ExpandoMetaClasses

Existing Groovy DSLs

The Grails Object Relational Mapping (GORM)

ATDD, BDD with GSpec, EasyB, and Spock

Building a Builder

Builder code structure

FactoryBuilderSupport

Implementing a Rules DSL

Groovy bindings

Building a Rewards DSL

Integrating it all

Mixing and matching Groovy and Java

GroovyClassLoader