[Java] Class ClassInfo
- org.codehaus.groovy.reflection.ClassInfo
- All Implemented Interfaces and Traits:
- Finalizable
public class ClassInfo extends Object implements Finalizable
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.
Nested Class Summary
Modifiers | Name | Description |
---|---|---|
interface | ClassInfo.ClassInfoAction |
Field Summary
Modifiers | Name | Description |
---|---|---|
int | hash |
Methods Summary
Type Params | Return Type | Name and description |
---|---|---|
public static void |
clearModifiedExpandos() | |
public ClassInfo |
computeValue(Class<?> type) | |
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 . | |
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 . | |
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. | |
public void |
setPerInstanceMetaClass(Object obj, MetaClass metaClass) | |
public void |
setStrongMetaClass(MetaClass answer) | |
public void |
setWeakMetaClass(MetaClass answer) | |
public static int |
size() | |
public void |
unlock() |
Inherited Methods Summary
Methods inherited from class | Name |
---|---|
class Object | wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll |
Field Detail
public final int hash
Method Detail
public static void clearModifiedExpandos()
@Override public ClassInfo computeValue(Class<?> type)
@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 thisClassInfo
, elsenull
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()
© 2003-2020 The Apache Software Foundation
Licensed under the Apache license.
https://docs.groovy-lang.org/3.0.7/html/gapi/org/codehaus/groovy/reflection/ClassInfo.html