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A Walkthrough of Groovy AST Transformations
The document discusses AST transformations in Groovy, which enable compile-time metaprogramming. It describes various annotations in Groovy like @Delegate, @Singleton, @Immutable, @Category, @Mixin, @Grab, @Synchronized, @Lazy, @Newify, @Bindable, @Log, @InheritConstructors, @ToString, @EqualsAndHashCode, @TupleConstructor, and @Canonical. These annotations were available in Groovy 1.7 and 1.8. Other projects also contain annotations that transform the AST.
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A Walkthrough of Groovy AST Transformations
- 1. A Walkthrough of Groovy AST Transformations
- 2. About the speaker ๏ Java developer since the beginning ๏ True believer in Open Source ๏ Groovy committer since 2007 ๏ Project lead of the Griffon framework ๏ Currently working for www.canoo.com 2
- 3. What are ASTTransformations? ๏ Essentially byte code generation ๏ They enable compile-time metaprogramming ๏ Groovy has two types of AST transformations: global and local www.canoo.com 3
- 4. Available in Groovy1.7 www.canoo.com
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- 15. Available in Groovy1.8 www.canoo.com
- 16. @Log (@Commons @Log4j@Slf4j) www.canoo.com 16
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- 21. @Canonical ๏ Merges @ToString,@EqualsAndHashCode and @TupleConstructor ๏ Allows specific tweaks per annotation www.canoo.com 21
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- 23. And there aremany more… ๏ @AutoClone ๏ @AutoExternalize ๏ @ConditionalInterrupt @TimedInterrupt @ThreadInterrupt ๏ @PackageScope ๏ @WithReadLock @WithWriteLock ๏ @Field www.canoo.com 23
- 24. Found in otherprojects ๏ . ‣ @Entity ๏ . ‣ @EventPublisher ‣ @Listener ‣ @Entity ‣ @Scaffold ๏ Modules ‣ @Scalify ‣ @Bytecode ๏ Groovy++ ‣ @Typed www.canoo.com 24
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