Package org.infinispan.container.entries

Class NullCacheEntry<K,V>

java.lang.Object

org.infinispan.container.entries.NullCacheEntry<K,V>

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map.Entry<K,V>, CacheEntry<K,V>, MetadataAware

public class NullCacheEntry<K,V>
extends java.lang.Object
implements CacheEntry<K,V>

Method Summary

Modifier and Type	Method	Description
CacheEntry	clone()
void	commit(DataContainer container)	Commits changes
static <K,V> NullCacheEntry<K,V>	getInstance()
K	getKey()	Retrieves the key to this entry
long	getLifespan()
long	getMaxIdle()
Metadata	getMetadata()	Get metadata of this cache entry.
V	getValue()	Retrieves the value of this entry
boolean	isChanged()
boolean	isCreated()
boolean	isEvicted()
boolean	isNull()	Tests whether the entry represents a null value, typically used for repeatable read.
boolean	isRemoved()
void	setChanged(boolean changed)
void	setCreated(boolean created)
void	setEvicted(boolean evicted)
void	setMetadata(Metadata metadata)	Set the metadata in the cache entry.
void	setRemoved(boolean removed)
void	setSkipLookup(boolean skipLookup)	See CacheEntry.skipLookup().
java.lang.Object	setValue(java.lang.Object value)	Sets the value of the entry, returning the previous value
boolean	skipLookup()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.container.entries.CacheEntry

getCreated, getLastUsed, setCreated, setLastUsed

Methods inherited from interface java.util.Map.Entry

equals, hashCode

Method Detail

getInstance

public static <K,V> NullCacheEntry<K,V> getInstance()

isNull

public boolean isNull()

Description copied from interface: CacheEntry

Tests whether the entry represents a null value, typically used for repeatable read.

Specified by:

isNull in interface CacheEntry<K,V>

Returns:

true if this represents a null, false otherwise.

isChanged

public boolean isChanged()

Specified by:

isChanged in interface CacheEntry<K,V>

Returns:

true if this entry has changed since being read from the container, false otherwise.

isCreated

public boolean isCreated()

Specified by:

isCreated in interface CacheEntry<K,V>

Returns:

true if this entry has been newly created, false otherwise.

isRemoved

public boolean isRemoved()

Specified by:

isRemoved in interface CacheEntry<K,V>

Returns:

true if this entry has been removed since being read from the container, false otherwise.

isEvicted

public boolean isEvicted()

Specified by:

isEvicted in interface CacheEntry<K,V>

Returns:

true if this entry has been evicted since being read from the container, false otherwise.

getKey

public K getKey()

Description copied from interface: CacheEntry

Retrieves the key to this entry

Specified by:

getKey in interface CacheEntry<K,V>

Specified by:

getKey in interface java.util.Map.Entry<K,V>

Returns:

a key

getValue

public V getValue()

Description copied from interface: CacheEntry

Retrieves the value of this entry

Specified by:

getValue in interface CacheEntry<K,V>

Specified by:

getValue in interface java.util.Map.Entry<K,V>

Returns:

the value of the entry

getLifespan

public long getLifespan()

Specified by:

getLifespan in interface CacheEntry<K,V>

Returns:

retrieves the lifespan of this entry. -1 means an unlimited lifespan.

getMaxIdle

public long getMaxIdle()

Specified by:

getMaxIdle in interface CacheEntry<K,V>

Returns:

the maximum allowed time for which this entry can be idle, after which it is considered expired.

skipLookup

public boolean skipLookup()

Specified by:

skipLookup in interface CacheEntry<K,V>

Returns:

true if the value must not be fetch from an external source

setValue

public java.lang.Object setValue(java.lang.Object value)

Description copied from interface: CacheEntry

Sets the value of the entry, returning the previous value

Specified by:

setValue in interface CacheEntry<K,V>

Specified by:

setValue in interface java.util.Map.Entry<K,V>

Parameters:

value - value to set

Returns:

previous value

commit

public void commit(DataContainer container)

Description copied from interface: CacheEntry

Commits changes

Specified by:

commit in interface CacheEntry<K,V>

Parameters:

container - data container to commit to

setChanged

public void setChanged(boolean changed)

Specified by:

setChanged in interface CacheEntry<K,V>

setCreated

public void setCreated(boolean created)

Specified by:

setCreated in interface CacheEntry<K,V>

setRemoved

public void setRemoved(boolean removed)

Specified by:

setRemoved in interface CacheEntry<K,V>

setEvicted

public void setEvicted(boolean evicted)

Specified by:

setEvicted in interface CacheEntry<K,V>

setSkipLookup

public void setSkipLookup(boolean skipLookup)

Description copied from interface: CacheEntry

See CacheEntry.skipLookup().

Specified by:

setSkipLookup in interface CacheEntry<K,V>

clone

public CacheEntry clone()

Specified by:

clone in interface CacheEntry<K,V>

Overrides:

clone in class java.lang.Object

getMetadata

public Metadata getMetadata()

Description copied from interface: MetadataAware

Get metadata of this cache entry.

Specified by:

getMetadata in interface MetadataAware

Returns:

a Metadata instance

setMetadata

public void setMetadata(Metadata metadata)

Description copied from interface: MetadataAware

Set the metadata in the cache entry.

Specified by:

setMetadata in interface MetadataAware

Parameters:

metadata - to apply to the cache entry

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object