org.bson.util

类 ClassMap<T>

java.lang.Object

org.bson.util.ClassMap<T>

public class ClassMap<T>
extends Object

Maps Class objects to values. A ClassMap is different from a regular Map in that get(c) does not only look to see if 'c' is a key in the Map, but also walks the up superclass and interface graph of 'c' to find matches. Derived matches of this sort are then "cached" in the registry so that matches are faster on future gets. This is a very useful class for Class based registries. Example: ClassMap m = new ClassMap(); m.put(Animal.class, "Animal"); m.put(Fox.class, "Fox"); m.Fox.class) --> "Fox" m.get(Dog.class) --> "Animal" (assuming Dog.class < Animal.class)

构造器概要

构造器

构造器和说明
ClassMap()

方法概要

方法

限定符和类型	方法和说明
void	clear()
T	get(Object key)
static <T> List<Class<?>>	getAncestry(Class<T> c) Walks superclass and interface graph, superclasses first, then interfaces, to compute an ancestry list.
boolean	isEmpty()
T	put(Class<?> key, T value)
T	remove(Object key)
int	size()

从类继承的方法 java.lang.Object

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

构造器详细资料

ClassMap

public ClassMap()

方法详细资料

getAncestry

public static <T> List<Class<?>> getAncestry(Class<T> c)

Walks superclass and interface graph, superclasses first, then interfaces, to compute an ancestry list. Supertypes are visited left to right. Duplicates are removed such that no Class will appear in the list before one of its subtypes.

get

public T get(Object key)

put

public T put(Class<?> key,
    T value)

remove

public T remove(Object key)

clear

public void clear()

size

public int size()

isEmpty

public boolean isEmpty()