Package org.codehaus.groovy.runtime.metaclass

Class ReflectorLoader

java.lang.Object

java.lang.ClassLoader

org.codehaus.groovy.runtime.metaclass.ReflectorLoader

public class ReflectorLoader
extends ClassLoader

Reflector creation helper. This class is used to define the Reflector classes. For each ClassLoader such a loader will be created by MetaClass. Special about this loader is, that it knows the classes form the Groovy Runtime. The Reflector class is resolved in different ways: During the definition of a class Reflector will resolve to the Reflector class of the runtime, even if there is another Reflector class in the parent loader. After the new class is defined Reflector will resolve like other Groovy classes. This loader is able to resolve all Groovy classes even if the parent does not know them, but the parent serves first (Reflector during a class definition is different).

Constructor Summary

Constructors

Constructor	Description
ReflectorLoader(ClassLoader parent)	Creates a new ReflectorLoader with the specified parent class loader.

Method Summary

Modifier and Type	Method	Description
Class	defineClass(String name, byte[] bytecode, ProtectionDomain domain)	Helper method to define Reflector classes.
protected Class	findClass(String name)	Tries to find a Groovy class.
Class	getLoadedClass(String name)	Retrieves a previously defined Reflector class by name from the cache.
protected Class	loadClass(String name, boolean resolve)	Loads a class per name.

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ReflectorLoader

public ReflectorLoader(ClassLoader parent)

Creates a new ReflectorLoader with the specified parent class loader. This loader is responsible for defining Reflector classes that can resolve the Reflector class from the Groovy runtime correctly.

Parameters:

parent - the parent class loader (should never be null)

Method Details

findClass

protected Class findClass(String name)
                   throws ClassNotFoundException

Tries to find a Groovy class. Uses the delegation loader to load classes when available.

Overrides:

findClass in class ClassLoader

Parameters:

name - the fully qualified name of the class to find

Returns:

the class if found

Throws:

ClassNotFoundException - if the class cannot be found

loadClass

protected Class loadClass(String name,
 boolean resolve)
                   throws ClassNotFoundException

Loads a class per name. Unlike a normal loadClass this version behaves different during a class definition. In that case it checks if the class we want to load is Reflector and returns class if the check is successful. If it is not during a class definition it just calls the super class version of loadClass.

Overrides:

loadClass in class ClassLoader

Parameters:

name - of the class to load

resolve - is true if the class should be resolved

Throws:

ClassNotFoundException

See Also:

• Reflector
• ClassLoader.loadClass(String, boolean)

defineClass

public Class defineClass(String name,
 byte[] bytecode,
 ProtectionDomain domain)

Helper method to define Reflector classes. This method sets the inDefine flag to true during class definition to ensure Reflector is resolved correctly, then resolves the newly defined class and stores it in the loadedClasses cache.

Parameters:

name - the fully qualified name of the Reflector class

bytecode - the bytecode of the Reflector class

domain - the protection domain for the class

Returns:

the newly defined class

getLoadedClass

public Class getLoadedClass(String name)

Retrieves a previously defined Reflector class by name from the cache.

Parameters:

name - the fully qualified name of the Reflector class

Returns:

the Reflector class if it has been defined, or null otherwise