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<h5>PART 2: GROOVY TOOLS</h5> • construct procedures
• checking out Groovy and Java tasks
<h5>PART three: GROOVY within the actual WORLD</h5> • The Spring framework
• Database entry
• RESTful internet prone
• construction and trying out net applications
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Extra info for Java Reflection in Action
If this feature is disabled, all of these methods throw a SecurityException. 1 Methods of Class for field introspection Method Description Field getField( String name) Returns a Field object that represents the specified public member field of the class or interface represented by this Class object Field getFields() Returns an array of Field objects that represents all the accessible public fields of the class or interface represented by this Class object Field getDeclaredField( String name ) Returns a Field object that represents the specified declared field of the class or interface represented by this Class object Field getDeclaredFields() Returns an array of Field objects that represents each field declared by the class or interface represented by this Class object Unfortunately, neither getFields nor getDeclaredFields provides exactly the information necessary for serialization.
In this case, metaobjects are objects that hold information about the program. Class and Method are classes whose instances represent the program. We refer to these as classes of metaobjects or metaobject classes. Metaobject classes are most of what make up Java’s reflection API. We refer to objects that are used to accomplish the main purposes of an application as base-level objects. In the setObjectColor example above, the application that calls George’s method as well as the objects passed to it as parameters are baselevel objects.
A Method object also provides the ability to call the method that it represents. For our example, we are most interested in the ability to call methods, so the rest of this section focuses on the invoke method. 1 Using dynamic invocation Dynamic invocation enables a program to call a method on an object at runtime without specifying which method at compile time. 2, George does not know which setColor method to call when he writes the program. His program relies upon introspection to examine the class of a parameter, obj, at runtime to find the right method.