Programming Grails - Cdn.oreilly.com

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Table of Contents Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi 1. Introduction to Groovy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Installing Groovy 1 Groovy Console 2 Optional Typing 3 Collections and Maps 4 Properties 5 Using the AST Browser 7 Decompiling with JD-GUI 8 Decompiling with javap 8 Closures 8 Interface Coercion 11 Programmatic Closures 11 Owner, Delegate, and this 12 Groovy’s Contributions in the War Against Verbosity 13 Constructors 14 Checked Exceptions 15 Groovy Truth 15 Semicolons 16 Optional Return 16 Scope 16 Parentheses 16 Default Imports 16 Differences Between Java and Groovy 17 Array Initialization 17 in and def Keywords 17 do/while Loops 17 for Loops 17 iii
Annotations 18 Groovy Equality 18 Multimethod Dispatch 18 Groovy Strings 19 Static this 20 The Groovy JDK (GDK) 21 DefaultGroovyMethods and InvokerHelper 21 Metaprogramming and the MOP 21 Adding Methods 22 Intercepting Method Calls 23 Operators 26 Null-Safe Dereference 26 Elvis 26 Spread 27 Spaceship 27 Field Access 28 as 28 in 28 Method Reference 29 Overload Your Operators 29 Being Too Groovy 31 def Considered Harmful 31 Closures Versus Methods 32 TypeChecked, CompileStatic, and invokedynamic 33 2. Grails Internals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Installing Grails 38 Creating an Application 38 The Grails Command Line 39 IDE Support 41 Plugins 42 Optional Plugins 43 Core Plugins 45 Conventions 57 Controller and View Conventions 57 Service Conventions 60 Domain Class Conventions 61 More Information 65 3. Persistence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Data Mapping 67 Nonpersistent Domain Classes 69 iv | Table of Contents
Page 2 and 3: Want to read more? Spreading the kn
Page 6 and 7: Data Validation 69 Custom Validatio
Page 8 and 9: Custom Configurations 148 Mapping V
Page 10 and 11: Monitoring and the Cloud Foundry UI
Page 12 and 13: standalone utility applications. Ju
Page 14 and 15: Collections and Maps Creating and p
Page 16 and 17: The default scope for classes, fiel
Page 18 and 19: Decompiling with JD-GUI I highly re
Page 20 and 21: println hello.getClass().superclass
Page 22 and 23: } }; This can be invoked from Groov
Page 24 and 25: You’ve already seen how property
Page 26 and 27: with: String s = someMethod(...) if
Page 28 and 29: or you could just skip the whole fo
Page 30 and 31: Using a StringBuilder (the preferre
Page 32 and 33: Every Groovy class implements the g
Page 34 and 35: You called add with args [2, 3] nul
Page 36 and 37: The output from the above code is:
Page 38 and 39: assert [alJones, jedSmith, zakJones
Page 40 and 41: } def leftShift(Person child) { chi
Page 42 and 43: def strings = [] but when the right
Page 44 and 45: See the Groovy 2.0 release notes an

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