org.skfiy.util

类 CachingMapDecorator<K,V>

java.lang.Object

org.skfiy.util.CachingMapDecorator<K,V>

所有已实现的接口:

Serializable, Map<K,V>

已过时。

as of Spring 3.2, to be removed along with LabeledEnum support

@Deprecated
public abstract class CachingMapDecorator<K,V>
extends Object
implements Map<K,V>, Serializable

A simple decorator for a Map, encapsulating the workflow for caching expensive values in a target Map. Supports caching weak or strong keys.

This class is an abstract template. Caching Map implementations should subclass and override the create(key) method which encapsulates expensive creation of a new object.

从以下版本开始:

1.2.2

作者:

Keith Donald, Juergen Hoeller

另请参阅:

序列化表格

嵌套类概要

从接口继承的嵌套类/接口 java.util.Map

Map.Entry<K,V>

构造器概要

构造器

构造器和说明
CachingMapDecorator() 已过时。 Create a CachingMapDecorator with strong keys, using an underlying synchronized Map.
CachingMapDecorator(boolean weak) 已过时。 Create a CachingMapDecorator, using an underlying synchronized Map.
CachingMapDecorator(boolean weak, int size) 已过时。 Create a CachingMapDecorator with initial size, using an underlying synchronized Map.
CachingMapDecorator(Map<K,V> targetMap) 已过时。 Create a CachingMapDecorator for the given Map.
CachingMapDecorator(Map<K,V> targetMap, boolean synchronize, boolean weak) 已过时。 Create a CachingMapDecorator for the given Map.

方法概要

方法

限定符和类型	方法和说明
void	clear() 已过时。
boolean	containsKey(Object key) 已过时。
boolean	containsValue(Object value) 已过时。
protected abstract V	create(K key) 已过时。 Create a value to cache for the given key.
Set<Map.Entry<K,V>>	entrySet() 已过时。
V	get(Object key) 已过时。 Get value for key.
boolean	isEmpty() 已过时。
Set<K>	keySet() 已过时。
V	put(K key, V value) 已过时。 Put an object into the cache, possibly wrapping it with a weak reference.
void	putAll(Map<? extends K,? extends V> map) 已过时。
V	remove(Object key) 已过时。
int	size() 已过时。
String	toString() 已过时。
protected boolean	useWeakValue(K key, V value) 已过时。 Decide whether to use a weak reference for the value of the given key-value pair.
Collection<V>	values() 已过时。

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Map

equals, hashCode

构造器详细资料

CachingMapDecorator

public CachingMapDecorator()

已过时。

Create a CachingMapDecorator with strong keys, using an underlying synchronized Map.

CachingMapDecorator

public CachingMapDecorator(boolean weak)

已过时。

Create a CachingMapDecorator, using an underlying synchronized Map.

参数:

weak - whether to use weak references for keys and values

CachingMapDecorator

public CachingMapDecorator(boolean weak,
                   int size)

已过时。

Create a CachingMapDecorator with initial size, using an underlying synchronized Map.

参数:

weak - whether to use weak references for keys and values

size - the initial cache size

CachingMapDecorator

public CachingMapDecorator(Map<K,V> targetMap)

已过时。

Create a CachingMapDecorator for the given Map.

The passed-in Map won't get synchronized explicitly, so make sure to pass in a properly synchronized Map, if desired.

参数:

targetMap - the Map to decorate

CachingMapDecorator

public CachingMapDecorator(Map<K,V> targetMap,
                   boolean synchronize,
                   boolean weak)

已过时。

Create a CachingMapDecorator for the given Map.

The passed-in Map won't get synchronized explicitly unless you specify "synchronize" as "true".

参数:

targetMap - the Map to decorate

synchronize - whether to synchronize on the given Map

weak - whether to use weak references for values

方法详细资料

size

public int size()

已过时。

指定者:

size 在接口中 Map<K,V>

isEmpty

public boolean isEmpty()

已过时。

指定者:

isEmpty 在接口中 Map<K,V>

containsKey

public boolean containsKey(Object key)

已过时。

指定者:

containsKey 在接口中 Map<K,V>

containsValue

public boolean containsValue(Object value)

已过时。

指定者:

containsValue 在接口中 Map<K,V>

remove

public V remove(Object key)

已过时。

指定者:

remove 在接口中 Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> map)

已过时。

指定者:

putAll 在接口中 Map<K,V>

clear

public void clear()

已过时。

指定者:

clear 在接口中 Map<K,V>

keySet

public Set<K> keySet()

已过时。

指定者:

keySet 在接口中 Map<K,V>

values

public Collection<V> values()

已过时。

指定者:

values 在接口中 Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

已过时。

指定者:

entrySet 在接口中 Map<K,V>

put

public V put(K key,
    V value)

已过时。

Put an object into the cache, possibly wrapping it with a weak reference.

指定者:

put 在接口中 Map<K,V>

另请参阅:

useWeakValue(Object, Object)

useWeakValue

protected boolean useWeakValue(K key,
                   V value)

已过时。

Decide whether to use a weak reference for the value of the given key-value pair.

参数:

key - the candidate key

value - the candidate value

返回:

true in order to use a weak reference; false otherwise.

get

public V get(Object key)

已过时。

Get value for key. Creates and caches value if it doesn't already exist in the cache.

This implementation is not synchronized: This is highly concurrent but does not guarantee unique instances in the cache, as multiple values for the same key could get created in parallel. Consider overriding this method to synchronize it, if desired.

指定者:

get 在接口中 Map<K,V>

另请参阅:

create(Object)

create

protected abstract V create(K key)

已过时。

Create a value to cache for the given key. Called by get if there is no value cached already.

参数:

key - the cache key

另请参阅:

get(Object)

toString

public String toString()

已过时。

覆盖:

toString 在类中 Object