Package com.helger.commons.lang

Class ClassHierarchyCache

java.lang.Object

com.helger.commons.lang.ClassHierarchyCache

@ThreadSafe
public final class ClassHierarchyCache
extends Object

A small class hierarchy cache

Author:

Philip Helger

Method Summary

Modifier and Type	Method	Description
static EChange	clearCache()	It's important to clear the cache upon application shutdown, because for web applications, keeping a cache of classes may prevent the web application from unloading
static ICommonsSet<Class<?>>	getClassHierarchy(Class<?> aClass)	Get the complete super class hierarchy of the passed class including all super classes and all interfaces of the passed class and of all parent classes.
static ICommonsIterable<WeakReference<Class<?>>>	getClassHierarchyIterator(Class<?> aClass)	Iterate the complete super class hierarchy of the passed class including all super classes and all interfaces of the passed class and of all parent classes.
static ICommonsList<Class<?>>	getClassHierarchyList(Class<?> aClass)	Get the complete super class hierarchy of the passed class including all super classes and all interfaces of the passed class and of all parent classes.

Methods inherited from class java.lang.Object

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

Method Detail

clearCache

@Nonnull
public static EChange clearCache()

It's important to clear the cache upon application shutdown, because for web applications, keeping a cache of classes may prevent the web application from unloading

Returns:

EChange

getClassHierarchy

@Nonnull
@ReturnsMutableCopy
public static ICommonsSet<Class<?>> getClassHierarchy(@Nonnull
                                                      Class<?> aClass)

Get the complete super class hierarchy of the passed class including all super classes and all interfaces of the passed class and of all parent classes.

Parameters:

aClass - The source class to get the hierarchy from.

Returns:

A non-null and non-empty Set containing the passed class and all super classes, and all super-interfaces.

getClassHierarchyList

@Nonnull
@ReturnsMutableCopy
public static ICommonsList<Class<?>> getClassHierarchyList(@Nonnull
                                                           Class<?> aClass)

Get the complete super class hierarchy of the passed class including all super classes and all interfaces of the passed class and of all parent classes.

Parameters:

aClass - The source class to get the hierarchy from.

Returns:

A non-null and non-empty list containing the passed class and all super classes, and all super-interfaces. Duplicates were already removed.

getClassHierarchyIterator

@Nonnull
public static ICommonsIterable<WeakReference<Class<?>>> getClassHierarchyIterator(@Nonnull
                                                                                  Class<?> aClass)

Iterate the complete super class hierarchy of the passed class including all super classes and all interfaces of the passed class and of all parent classes.

Parameters:

aClass - The source class to get the hierarchy from.

Returns:

A non-null and non-empty list containing the passed class and all super classes, and all super-interfaces. Duplicates were already removed.