org.codehaus.groovy.runtime.metaclass

## Class MetaClassRegistryImpl

- java.lang.Object
- - org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl

All Implemented Interfaces:
  MetaClassRegistry

    public class MetaClassRegistryImpl
    extends Object
    implements MetaClassRegistry

A registry of MetaClass instances which caches introspection & reflection information and allows methods to be dynamically added to existing classes at runtime

Version:
  $Revision: 21040 $
Author:
  James Strachan, John Wilson, Jochen Theodorou, Graeme Rocher, Alex Tkachman

### Nested Class Summary

### Nested classes/interfaces inherited from interface groovy.lang.MetaClassRegistry

`MetaClassRegistry.MetaClassCreationHandle`

### Field Summary

Fields
`static int` `DONT_LOAD_DEFAULT`
`static int` `LOAD_DEFAULT`

### Constructor Summary

Constructors
Constructor and Description
`MetaClassRegistryImpl()`
`MetaClassRegistryImpl(boolean useAccessible)`
`MetaClassRegistryImpl(int loadDefault)`
`MetaClassRegistryImpl(int loadDefault, boolean useAccessible)`

### Method Summary

Methods
`void` `addMetaClassRegistryChangeEventListener(MetaClassRegistryChangeEventListener listener)` Adds a listener for constant meta classes.
`protected void` `fireConstantMetaClassUpdate(Class c, MetaClass newMc)` Causes the execution of all registered listeners.
`static MetaClassRegistry` `getInstance(int includeExtension)` Singleton of MetaClassRegistry.
`FastArray` `getInstanceMethods()`
`MetaClass` `getMetaClass(Class theClass)`
`MetaClass` `getMetaClass(Object obj)`
`MetaClassRegistry.MetaClassCreationHandle` `getMetaClassCreationHandler()` Gets a handle internally used to create MetaClass implementations WARNING: experimental code, likely to change soon
`MetaClassRegistryChangeEventListener[]` `getMetaClassRegistryChangeEventListeners()` Gets an array of of all registered ConstantMetaClassListener instances.
`FastArray` `getStaticMethods()`
`Iterator` `iterator()` Returns an iterator to iterate over all constant meta classes.
`void` `removeMetaClass(Class theClass)` Removes a cached MetaClass from the registry
`void` `removeMetaClassRegistryChangeEventListener(MetaClassRegistryChangeEventListener listener)` Removes a constant meta class listener.
`void` `setMetaClass(Class theClass, MetaClass theMetaClass)` Registers a new MetaClass in the registry to customize the type
`void` `setMetaClass(Object obj, MetaClass theMetaClass)`
`void` `setMetaClassCreationHandle(MetaClassRegistry.MetaClassCreationHandle handle)` Sets a handle internally used to create MetaClass implementations.
`boolean` `useAccessible()`

### Methods inherited from class java.lang.Object

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

### Field Detail

#### LOAD_DEFAULT

    public static final int LOAD_DEFAULT

See Also:
  Constant Field Values

#### DONT_LOAD_DEFAULT

    public static final int DONT_LOAD_DEFAULT

See Also:
  Constant Field Values

### Constructor Detail

#### MetaClassRegistryImpl

    public MetaClassRegistryImpl()

#### MetaClassRegistryImpl

    public MetaClassRegistryImpl(int loadDefault)

#### MetaClassRegistryImpl

    public MetaClassRegistryImpl(boolean useAccessible)

Parameters:
  `useAccessible` - defines whether or not the `AccessibleObject.setAccessible(boolean)` method will be called to enable access to all methods when using reflection

#### MetaClassRegistryImpl

    public MetaClassRegistryImpl(int loadDefault,
                         boolean useAccessible)

### Method Detail

#### getMetaClass

    public final MetaClass getMetaClass(Class theClass)

Specified by:
  `getMetaClass` in interface `MetaClassRegistry`

#### getMetaClass

    public MetaClass getMetaClass(Object obj)

#### removeMetaClass

    public void removeMetaClass(Class theClass)

Description copied from interface: `MetaClassRegistry`
Removes a cached MetaClass from the registry

Specified by:
  `removeMetaClass` in interface `MetaClassRegistry`
Parameters:
  `theClass` - The Java class of the MetaClass to remove

#### setMetaClass

    public void setMetaClass(Class theClass,
                    MetaClass theMetaClass)

Registers a new MetaClass in the registry to customize the type

Specified by:
  `setMetaClass` in interface `MetaClassRegistry`
Parameters:
  `theClass` -
  `theMetaClass` -

#### setMetaClass

    public void setMetaClass(Object obj,
                    MetaClass theMetaClass)

#### useAccessible

    public boolean useAccessible()

#### getMetaClassCreationHandler

    public MetaClassRegistry.MetaClassCreationHandle getMetaClassCreationHandler()

Gets a handle internally used to create MetaClass implementations WARNING: experimental code, likely to change soon

Specified by:
  `getMetaClassCreationHandler` in interface `MetaClassRegistry`
Returns:
  the handle

#### setMetaClassCreationHandle

    public void setMetaClassCreationHandle(MetaClassRegistry.MetaClassCreationHandle handle)

Sets a handle internally used to create MetaClass implementations. When replacing the handle with a custom version, you should reuse the old handle to keep custom logic and to use the default logic as fall back. WARNING: experimental code, likely to change soon

Specified by:
  `setMetaClassCreationHandle` in interface `MetaClassRegistry`
Parameters:
  `handle` - the handle

#### addMetaClassRegistryChangeEventListener

    public void addMetaClassRegistryChangeEventListener(MetaClassRegistryChangeEventListener listener)

Adds a listener for constant meta classes.

Specified by:
  `addMetaClassRegistryChangeEventListener` in interface `MetaClassRegistry`
Parameters:
  `listener` - the listener

#### removeMetaClassRegistryChangeEventListener

    public void removeMetaClassRegistryChangeEventListener(MetaClassRegistryChangeEventListener listener)

Removes a constant meta class listener.

Specified by:
  `removeMetaClassRegistryChangeEventListener` in interface `MetaClassRegistry`
Parameters:
  `listener` - the listener

#### fireConstantMetaClassUpdate

    protected void fireConstantMetaClassUpdate(Class c,
                                   MetaClass newMc)

Causes the execution of all registered listeners. This method is used mostly internal to kick of the listener notification. It can also be used by subclasses to achieve the same.

Parameters:
  `c` - the class
  `newMc` - the new MetaClass

#### getMetaClassRegistryChangeEventListeners

    public MetaClassRegistryChangeEventListener[] getMetaClassRegistryChangeEventListeners()

Gets an array of of all registered ConstantMetaClassListener instances.

Specified by:
  `getMetaClassRegistryChangeEventListeners` in interface `MetaClassRegistry`
Returns:
  an array containing all change listener

#### getInstance

    public static MetaClassRegistry getInstance(int includeExtension)

Singleton of MetaClassRegistry.

Parameters:
  `includeExtension` -
Returns:
  the registry

#### getInstanceMethods

    public FastArray getInstanceMethods()

#### getStaticMethods

    public FastArray getStaticMethods()

#### iterator

    public Iterator iterator()

Returns an iterator to iterate over all constant meta classes. This iterator can be seen as making a snapshot of the current state of the registry. The snapshot will include all meta classes that has been used unless they are already collected. Collected meta classes will be skipped automatically, so you can expect that each element of the iteration is not null. Calling this method is thread safe, the usage of the iterator is not.

Specified by:
  `iterator` in interface `MetaClassRegistry`
Returns:
  the iterator.