Package: groovy.lang

## [Java] Interface MutableMetaClass

- groovy.lang.MetaObjectProtocol

- All Superinterfaces:
    MetaClass, MetaObjectProtocol

      public interface MutableMetaClass
      extends MetaClass

  An interface that defines methods that implementers of mutable Meta classes should specify. It provides operations to perform mutations on the MetaClass instance.

  Whether a MetaClass allows mutation is up to the MetaClass itself and considerations of Thread safety need to be taken into account when making a MetaClass mutable

  The default implementation allows mutation of MetaClass instances before initialisation (before the initialize() method is called) but not after, thus ensuring Thread safety once a MetaClass has been constructed and placed in the registry

  See Also:
    MetaClassImpl
    MetaClass
  Since:
    1.5

- - ### Methods Summary

    Methods
    Type Params | Return Type | Name and description
    --- | --- | ---
    `` | `public void` | `addMetaBeanProperty(MetaBeanProperty metaBeanProperty)` Adds a new MetaBeanProperty to the MetaClass
    `` | `public void` | `addMetaMethod(MetaMethod metaMethod)` Adds a new MetaMethod to the MetaClass
    `` | `public void` | `addNewInstanceMethod(Method method)` adds a new instance method to this MetaClass.
    `` | `public void` | `addNewStaticMethod(Method method)` adds a new static method to this MetaClass.
    `` | `public boolean` | `isModified()` Return whether the MetaClass has been modified or not

  - ### Inherited Methods Summary

    Inherited Methods
    Methods inherited from class | Name
    --- | ---
    `interface MetaClass` | `getAttribute, getClassNode, getMetaMethods, getMethods, getProperties, getProperty, initialize, invokeMethod, invokeMissingMethod, invokeMissingProperty, pickMethod, selectConstructorAndTransformArguments, setAttribute, setProperty`
    `interface MetaObjectProtocol` | `getAttribute, getMetaMethod, getMetaProperty, getMethods, getProperties, getProperty, getStaticMetaMethod, getTheClass, hasProperty, invokeConstructor, invokeMethod, invokeMethod, invokeStaticMethod, respondsTo, respondsTo, setAttribute, setProperty`

- - ### Method Detail

    - #### public void addMetaBeanProperty(MetaBeanProperty metaBeanProperty)

      Adds a new MetaBeanProperty to the MetaClass

      Parameters:
        `metaBeanProperty` - The MetaBeanProperty instance

    - #### public void addMetaMethod(MetaMethod metaMethod)

      Adds a new MetaMethod to the MetaClass

      Parameters:
        `metaMethod` - The MetaMethod to add

    - #### public void addNewInstanceMethod(Method method)

      adds a new instance method to this MetaClass. Instance methods are able to overwrite the original methods of the class. Calling this method should not be done after initialise was called.

      Parameters:
        `method` - the method to be added

    - #### public void addNewStaticMethod(Method method)

      adds a new static method to this MetaClass. This is only possible as long as initialise was not called.

      Parameters:
        `method` - the method to be added

    - #### public boolean isModified()

      Return whether the MetaClass has been modified or not

      Returns:
        True if it has