jaxx
Class ClassMap<T>

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap<ClassDescriptor,T>
          jaxx.ClassMap<T>

Type Parameters:

T - type of the class

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<ClassDescriptor,T>

public class ClassMap<T>
extends java.util.HashMap<ClassDescriptor,T>

A Map implementation which uses Classes as keys. ClassMap differs from typical maps in that it takes subclasses into account; mapping a class to a value also maps all subclasses of that class to the value.

A get operation will return the value associated with the class itself, or failing that, with its nearest ancestor for which there exists a mapping.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Field Summary

protected static org.apache.commons.logging.Log

log log

Constructor Summary

ClassMap()

Method Summary

T	get(java.lang.Object key) Returns the value associated with the key Class.
T	put(ClassDescriptor key, T value) Associates a value with a class and all of its descendents.

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, entrySet, isEmpty, keySet, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

log

protected static final org.apache.commons.logging.Log log

log

Constructor Detail

ClassMap

public ClassMap()

Method Detail

get

public T get(java.lang.Object key)

Returns the value associated with the key Class. If the class itself does not have a mapping, its superclass will be checked, and so on until an ancestor class with a mapping is located. If none of the class' ancestors have a mapping, null is returned.

Specified by:

get in interface java.util.Map<ClassDescriptor,T>

Overrides:

get in class java.util.HashMap<ClassDescriptor,T>

Parameters:

key - the class to check

Returns:

the mapping for the class

put

public T put(ClassDescriptor key,
             T value)

Associates a value with a class and all of its descendents.

Specified by:

put in interface java.util.Map<ClassDescriptor,T>

Overrides:

put in class java.util.HashMap<ClassDescriptor,T>

Parameters:

key - the class to map

value - the value to map to the class

Returns:

the old value associated with the class