groovy.lang
Interface MetaClassRegistry

interface MetaClassRegistry

A MetaClassRegistry is an object that is responsible for managing the a cache of MetaClass instances. Each java.lang.Class instance has an associated MetaClass and client code can query this interface for the MetaClass for a given associated java.lang.Class

see:

MetaClass

author:

John Wilson

author:

Graeme Rocher

author:

Jochen Theodorou

addMetaClassRegistryChangeEventListener

public void addMetaClassRegistryChangeEventListener(MetaClassRegistryChangeEventListener listener)

adds a ConstantMetaClassChangeListener

param:

listener - the update listener

getMetaClass

public MetaClass getMetaClass(Class theClass)

getMetaClassCreationHandler

public MetaClassCreationHandle getMetaClassCreationHandler()

Retrieves the MetaClassCreationHandle that is responsible for constructing MetaClass instances

return:

The MetaClassCreationHandle instance

getMetaClassRegistryChangeEventListeners

public MetaClassRegistryChangeEventListener[] getMetaClassRegistryChangeEventListeners()

Returns all registered ConstantMetaClassChangeListener objects.

return:

an array containing all change listener

iterator

public Iterator iterator()

gets a snapshot of the current constant meta classes and returns it as Iterator. Modifications done using this Iterator will not cause a ConcurrentMoidificationExcpetion. If a MetaClass is removed using this Iterator, then the MetaClass will only be removed if the MetaClass was not replaced by another MetaClass in the meantime. If a MetaClass is added while using this Iterator, then it will be part of the Iteration. If a MetaClass replaces another constant meta class, then the Iteration might show two meta classes for the same class.
This Iterator may not used in multiple threads.

return:

Iterator for the constant meta classes

removeMetaClass

public void removeMetaClass(Class theClass)

Removes a cached MetaClass from the registry

param:

theClass The Java class of the MetaClass to remove

removeMetaClassRegistryChangeEventListener

public void removeMetaClassRegistryChangeEventListener(MetaClassRegistryChangeEventListener listener)

removes a ConstantMetaClassChangeListener

param:

listener - the update listener

setMetaClass

public void setMetaClass(Class theClass, MetaClass theMetaClass)

setMetaClassCreationHandle

public void setMetaClassCreationHandle(MetaClassCreationHandle handle)

Sets the MetaClassCreationHandle instance that is responsible for constructing instances

param:

handle The handle instance

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