com.gentlyweb.utils

类 ObjectCache

java.lang.Object

com.gentlyweb.utils.ObjectCache

所有已实现的接口:

ObjectCacheManager

public class ObjectCache
extends Object
implements ObjectCacheManager

The ObjectCache is it's own manager which means that classes that extend this one can do so quickly and without having to implement the ObjectCacheManager interface they only have to provide their own functionality whilst client classes can rely on the interface. All operations defined with ObjectCacheManager are supported here.

字段概要

字段

限定符和类型	字段和说明
static int	OLDEST
static int	RANDOM
static int	YOUNGEST

构造器概要

构造器

构造器和说明
ObjectCache(int policy)

方法概要

限定符和类型	方法和说明
ObjectCache	cacheSlice(Date from, Date to)
ObjectCache	cacheSliceFrom(Date from)
ObjectCache	cacheSliceTo(Date to)
int	capacity() Return the current capacity of the cache, it should basically be (max size - current size).
boolean	containsKey(Object key)
Object	firstKey()
Object	firstValue()
void	flush() Clear our data structures.
Object	get(Object key)
Date	getLastAccessTime(Object key)
int	getMaxSize()
int	getPolicy()
boolean	isEmpty() Return whether the cache is empty or not.
Iterator	iterator()
List	keys() Return a List of all the keys in the cache.
List	keys(GeneralFilter f)
List	keysForFilteredValues(GeneralFilter f)
void	keysToList(List list)
Object	lastValue()
void	merge(ObjectCache cache) Merge the current cache with another.
void	put(Object key, Object value)
void	putAll(Map map) Add all the entries in the Map to cache.
void	remove(Object key)
protected void	resize()
void	resize(int size) Resize the cache to a particular size, if the size is actually bigger than the current size then this operation should not touch the cached objects, if the size is less then the cache should be reduced in size using the current policy until the size is reached.
void	setMaxSize(int size) Set the maximum size of the cache.
void	setPolicy(int type)
int	size()
Map	slice(Date from, Date to)
Map	sliceFrom(Date from)
Map	sliceTo(Date to)
void	toMap(Map map) Get all the entries in the cache as a Map of key to value.
List	values() Return a List of all the values in the cache.
List	values(GeneralFilter f)
void	valuesToList(List list)

从类继承的方法 java.lang.Object

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

字段详细资料

OLDEST

public static final int OLDEST

另请参阅:

常量字段值

YOUNGEST

public static final int YOUNGEST

另请参阅:

常量字段值

RANDOM

public static final int RANDOM

另请参阅:

常量字段值

构造器详细资料

ObjectCache

public ObjectCache(int policy)
            throws IllegalArgumentException

抛出:

IllegalArgumentException

方法详细资料

setPolicy

public void setPolicy(int type)
               throws IllegalArgumentException

指定者:

setPolicy 在接口中 ObjectCacheManager

抛出:

IllegalArgumentException

getPolicy

public int getPolicy()

iterator

public Iterator iterator()

keys

public List keys()

Return a List of all the keys in the cache.

返回:

The List (ArrayList) of all the keys in the cache.

values

public List values()

Return a List of all the values in the cache.

返回:

The List (ArrayList) of all the values in the cache.

keysForFilteredValues

public List keysForFilteredValues(GeneralFilter f)
                           throws IllegalAccessException,
                                  InvocationTargetException,
                                  FilterException

抛出:

IllegalAccessException

InvocationTargetException

FilterException

values

public List values(GeneralFilter f)
            throws IllegalAccessException,
                   InvocationTargetException,
                   FilterException

抛出:

IllegalAccessException

InvocationTargetException

FilterException

keys

public List keys(GeneralFilter f)
          throws IllegalAccessException,
                 InvocationTargetException,
                 FilterException

抛出:

IllegalAccessException

InvocationTargetException

FilterException

valuesToList

public void valuesToList(List list)

keysToList

public void keysToList(List list)

toMap

public void toMap(Map map)

从接口复制的说明: ObjectCacheManager

Get all the entries in the cache as a Map of key to value.

指定者:

toMap 在接口中 ObjectCacheManager

参数:

map - The Map that should be populated with the key/values in the cache.

putAll

public void putAll(Map map)

从接口复制的说明: ObjectCacheManager

Add all the entries in the Map to cache.

指定者:

putAll 在接口中 ObjectCacheManager

参数:

map - The Map to get key/values from.

containsKey

public boolean containsKey(Object key)

merge

public void merge(ObjectCache cache)

从接口复制的说明: ObjectCacheManager

Merge the current cache with another.

指定者:

merge 在接口中 ObjectCacheManager

参数:

cache - The cache to merge.

cacheSliceTo

public ObjectCache cacheSliceTo(Date to)

cacheSliceFrom

public ObjectCache cacheSliceFrom(Date from)

cacheSlice

public ObjectCache cacheSlice(Date from,
                              Date to)

sliceFrom

public Map sliceFrom(Date from)

sliceTo

public Map sliceTo(Date to)

slice

public Map slice(Date from,
                 Date to)

getLastAccessTime

public Date getLastAccessTime(Object key)

isEmpty

public boolean isEmpty()

从接口复制的说明: ObjectCacheManager

Return whether the cache is empty or not.

指定者:

isEmpty 在接口中 ObjectCacheManager

返回:

true if the cache is empty, false if it has entries.

capacity

public int capacity()

从接口复制的说明: ObjectCacheManager

Return the current capacity of the cache, it should basically be (max size - current size).

指定者:

capacity 在接口中 ObjectCacheManager

返回:

The current number of items that can be added until the cache reaches it's maximum size.

getMaxSize

public int getMaxSize()

setMaxSize

public void setMaxSize(int size)

从接口复制的说明: ObjectCacheManager

Set the maximum size of the cache.

指定者:

setMaxSize 在接口中 ObjectCacheManager

参数:

size - The maximum size.

get

public Object get(Object key)

firstValue

public Object firstValue()

lastValue

public Object lastValue()

firstKey

public Object firstKey()

size

public int size()

remove

public void remove(Object key)

resize

public void resize(int size)

从接口复制的说明: ObjectCacheManager

Resize the cache to a particular size, if the size is actually bigger than the current size then this operation should not touch the cached objects, if the size is less then the cache should be reduced in size using the current policy until the size is reached. Either way the maximum size should be set to this value.

指定者:

resize 在接口中 ObjectCacheManager

参数:

size - The new size.

resize

protected void resize()

put

public void put(Object key,
                Object value)

flush

public void flush()

Clear our data structures.

指定者:

flush 在接口中 ObjectCacheManager