Package org.codehaus.groovy.runtime.metaclass

Class MixedInMetaClass

java.lang.Object

groovy.lang.DelegatingMetaClass

org.codehaus.groovy.runtime.metaclass.OwnedMetaClass

org.codehaus.groovy.runtime.metaclass.MixedInMetaClass

All Implemented Interfaces:

GroovyObject, MetaClass, MetaObjectProtocol, MutableMetaClass

public class MixedInMetaClass
extends OwnedMetaClass

A delegating MetaClass that allows mixing in a mixin object. This class delegates method invocation to an owner object's MetaClass while maintaining a weak reference to the owner to prevent memory leaks.

This implementation is for internal use by the Groovy runtime's mixin feature.

Field Summary

Fields inherited from class groovy.lang.DelegatingMetaClass

delegate

Constructor Summary

Constructors

Constructor	Description
MixedInMetaClass(Object instance, Object owner)	Constructs a new MixedInMetaClass.

Method Summary

Modifier and Type	Method	Description
protected Object	getOwner()	Returns the owner object whose MetaClass should be used for delegated operations.
protected MetaClass	getOwnerMetaClass(Object owner)	Returns the MetaClass of the owner object.
Object	invokeMethod(Class sender, Object receiver, String methodName, Object[] arguments, boolean isCallToSuper, boolean fromInsideClass)	Invokes a method on the owner's MetaClass with caller context.

Methods inherited from class org.codehaus.groovy.runtime.metaclass.OwnedMetaClass

equals, getAttribute, getAttribute, getClassNode, getMetaMethod, getMetaMethod, getMetaMethods, getMetaProperty, getMethods, getProperties, getProperty, getProperty, getStaticMetaMethod, getStaticMetaMethod, getTheClass, hashCode, hasProperty, invokeConstructor, invokeMethod, invokeMethod, invokeMissingMethod, invokeMissingProperty, invokeStaticMethod, isGroovyObject, respondsTo, respondsTo, selectConstructorAndTransformArguments, setAttribute, setAttribute, setProperty, setProperty, toString

Methods inherited from class groovy.lang.DelegatingMetaClass

addMetaBeanProperty, addMetaMethod, addNewInstanceMethod, addNewStaticMethod, getAdaptee, getMetaClass, getProperty, initialize, invokeMethod, isModified, pickMethod, setAdaptee, setMetaClass, setProperty

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

MixedInMetaClass

public MixedInMetaClass(Object instance,
 Object owner)

Constructs a new MixedInMetaClass.

Parameters:

instance - the instance that will have the mixin applied

owner - the owner object that provides the mixin functionality

Method Details

getOwner

protected Object getOwner()

Description copied from class: OwnedMetaClass

Returns the owner object whose MetaClass should be used for delegated operations.

Specified by:

getOwner in class OwnedMetaClass

Returns:

the owner object

getOwnerMetaClass

protected MetaClass getOwnerMetaClass(Object owner)

Description copied from class: OwnedMetaClass

Returns the MetaClass of the owner object.

Specified by:

getOwnerMetaClass in class OwnedMetaClass

Parameters:

owner - the owner object

Returns:

the owner's MetaClass

invokeMethod

public Object invokeMethod(Class sender,
 Object receiver,
 String methodName,
 Object[] arguments,
 boolean isCallToSuper,
 boolean fromInsideClass)

Description copied from class: OwnedMetaClass

Invokes a method on the owner's MetaClass with caller context.

Specified by:

invokeMethod in interface MetaClass

Overrides:

invokeMethod in class OwnedMetaClass

Parameters:

sender - the class making the request

receiver - the receiver object (ignored; the owner is used instead)

methodName - the method name

arguments - the method arguments

isCallToSuper - whether this is a super method call

fromInsideClass - whether this is called from inside the class

Returns:

the method result