Package org.omnifaces.util.cache

Class CacheEntry

java.lang.Object

org.omnifaces.util.cache.CacheEntry

All Implemented Interfaces:

Serializable

public class CacheEntry
extends Object
implements Serializable

Meta data for a value that's stored in a cache. Can be used for cache implementations that don't support both validity and attributes natively. Cache implementations are not required to use this type.

Since OmniFaces 3.0 the Object value and Map<String, Object> attributes have been reworked to Serializable value and Map<String, Serializable> attributes in order to explicitly set the expected type.

Since:

1.1

Author:

Arjan Tijms

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
CacheEntry(Serializable value, Date validTill)

Method Summary

Modifier and Type	Method	Description
Map<String,Serializable>	getAttributes()	Gets a map of attributes associated with this entry.
Date	getValidTill()	Returns the date that's the last moment in time the value obtained via getValue() is valid.
Serializable	getValue()	Returns the value for which this object is keeping meta data
boolean	isValid()	Returns whether this entry holds a valid value.
void	setValidTill(Date validTill)	Sets the date that's the last moment in time the value obtained via getValue() is valid.
void	setValue(Serializable value)	Sets the value for which this object is keeping meta data

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheEntry

public CacheEntry(Serializable value,
                  Date validTill)

Method Detail

getValue

public Serializable getValue()

Returns the value for which this object is keeping meta data

Returns:

The value for which meta data is kept

setValue

public void setValue(Serializable value)

Sets the value for which this object is keeping meta data

Parameters:

value - The value for which meta data is kept

getValidTill

public Date getValidTill()

Returns the date that's the last moment in time the value obtained via getValue() is valid. After that moment, the value should not be used.

Returns:

date indicating last moment value hold by this object is valid.

setValidTill

public void setValidTill(Date validTill)

Sets the date that's the last moment in time the value obtained via getValue() is valid. After that moment, the value should not be used.

Parameters:

validTill - date indicating last moment value hold by this object is valid.

Since:

1.2

isValid

public boolean isValid()

Returns whether this entry holds a valid value. If false is returned, the value should not be used and the cache implementation should try to remove this entry and its associated value from the cache.

Returns:

true if this entry is still valid, false otherwise.

getAttributes

public Map<String,Serializable> getAttributes()

Gets a map of attributes associated with this entry.

Attributes are general key,value pairs, that are currently mainly used to store the result of EL expressions that appear in the rendering represented by the main value this entry represents.

Returns:

a map of attributes associated with this entry.

Since:

1.2