Package: org.codehaus.groovy.reflection

## [Java] Class ClassInfo

- org.codehaus.groovy.reflection.ClassInfo

- All Implemented Interfaces and Traits:
    Finalizable

      public class ClassInfo
      extends Object

  Handle for all information we want to keep about the class

  This class handles caching internally and its advisable to not store references directly to objects of this class. The static factory method ClassInfo.getClassInfo should be used to retrieve an instance from the cache. Internally the `Class` associated with a `ClassInfo` instance is kept as WeakReference, so it not safe to reference and instance without the Class being either strongly or softly reachable.

  Authors:
    Alex.Tkachman

- - ### Nested Class Summary

    Nested classes
    Modifiers | Name | Description
    --- | --- | ---
    `interface` | `ClassInfo.ClassInfoAction` |

  - ### Field Summary

    Fields
    Modifiers | Name | Description
    --- | --- | ---
    `int` | `hash` |

  - ### Methods Summary

    Methods
    Type Params | Return Type | Name and description
    --- | --- | ---
    `` | `static void` | `clearModifiedExpandos()`
    `` | `void` | `finalizeReference()`
    `` | `static int` | `fullSize()`
    `` | `static Collection<ClassInfo>` | `getAllClassInfo()`
    `` | `ClassLoaderForClassArtifacts` | `getArtifactClassLoader()`
    `` | `CachedClass` | `getCachedClass()`
    `` | `static ClassInfo` | `getClassInfo(Class cls)`
    `` | `MetaClass` | `getMetaClass()` Returns the `MetaClass` for the `Class` associated with this `ClassInfo`.
    `` | `MetaClass` | `getMetaClass(Object obj)`
    `` | `MetaClass` | `getMetaClassForClass()`
    `` | `ExpandoMetaClass` | `getModifiedExpando()`
    `` | `MetaClass` | `getPerInstanceMetaClass(Object obj)`
    `` | `MetaClass` | `getStrongMetaClass()`
    `` | `Class<?>` | `getTheClass()` Returns the `Class` associated with this `ClassInfo`.
    `` | `int` | `getVersion()`
    `` | `MetaClass` | `getWeakMetaClass()`
    `` | `boolean` | `hasPerInstanceMetaClasses()`
    `` | `void` | `incVersion()`
    `` | `void` | `lock()`
    `` | `static void` | `onAllClassInfo(ClassInfo.ClassInfoAction action)`
    `` | `static void` | `remove(Class<?> cls)` Removes a `ClassInfo` from the cache.
    `` | `void` | `setPerInstanceMetaClass(Object obj, MetaClass metaClass)`
    `` | `void` | `setStrongMetaClass(MetaClass answer)`
    `` | `void` | `setWeakMetaClass(MetaClass answer)`
    `` | `static int` | `size()`
    `` | `void` | `unlock()`

  - ### Inherited Methods Summary

    Inherited Methods
    Methods inherited from class | Name
    --- | ---
    `class Object` | `equals, toString, hashCode, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### public final int hash

  - ### Method Detail

    - #### public static void clearModifiedExpandos()

    - #### @Override public void finalizeReference()

    - #### public static int fullSize()

    - #### public static Collection<ClassInfo> getAllClassInfo()

    - #### public ClassLoaderForClassArtifacts getArtifactClassLoader()

    - #### public CachedClass getCachedClass()

    - #### public static ClassInfo getClassInfo(Class cls)

    - #### public final MetaClass getMetaClass()

      Returns the `MetaClass` for the `Class` associated with this `ClassInfo`. If no `MetaClass` exists one will be created.

      It is not safe to call this method without a `Class` associated with this `ClassInfo`. It is advisable to aways retrieve a ClassInfo instance from the cache by using the static factory method ClassInfo.getClassInfo to ensure the referenced Class is strongly reachable.

      Returns:
        a `MetaClass` instance

    - #### public MetaClass getMetaClass(Object obj)

    - #### public MetaClass getMetaClassForClass()

    - #### public ExpandoMetaClass getModifiedExpando()

    - #### public MetaClass getPerInstanceMetaClass(Object obj)

    - #### public MetaClass getStrongMetaClass()

    - #### public final Class<?> getTheClass()

      Returns the `Class` associated with this `ClassInfo`.

      This method can return `null` if the `Class` is no longer reachable through any strong or soft references. A non-null return value indicates that this `ClassInfo` is valid.

      Returns:
        the `Class` associated with this `ClassInfo`, else `null`

    - #### public int getVersion()

    - #### public MetaClass getWeakMetaClass()

    - #### public boolean hasPerInstanceMetaClasses()

    - #### public void incVersion()

    - #### public void lock()

    - #### public static void onAllClassInfo(ClassInfo.ClassInfoAction action)

    - #### public static void remove(Class<?> cls)

      Removes a `ClassInfo` from the cache. This is useful in cases where the Class is parsed from a script, such as when using GroovyClassLoader#parseClass, and is executed for its result but the Class is not retained or cached. Removing the `ClassInfo` associated with the Class will make the Class and its ClassLoader eligible for garbage collection sooner that it would otherwise.

      Parameters:
        `cls` - the Class associated with the ClassInfo to remove from cache

    - #### public void setPerInstanceMetaClass(Object obj, MetaClass metaClass)

    - #### public void setStrongMetaClass(MetaClass answer)

    - #### public void setWeakMetaClass(MetaClass answer)

    - #### public static int size()

    - #### public void unlock()