DefaultExpirationPolicy

java.lang.Object

org.apache.xmlgraphics.image.loader.cache.DefaultExpirationPolicy

All Implemented Interfaces:: ExpirationPolicy

public class DefaultExpirationPolicy extends Object implements ExpirationPolicy

Implements the default expiration policy for the image cache.

Field Summary

Fields

Modifier and Type

Field

Description

static final int

EXPIRATION_IMMEDIATE

static final int

EXPIRATION_NEVER

private int

expirationAfter
Constructor Summary

Constructors

Constructor

Description

DefaultExpirationPolicy()

Creates a new policy with default settings (expiration in 60 seconds).

DefaultExpirationPolicy(int expirationAfter)

Creates a new policy.
Method Summary

Modifier and Type

Method

Description

boolean

isExpired(TimeStampProvider provider, long timestamp)

Indicates whether a cache entry is expired given its creation time stamp.

private boolean

isNeverExpired()

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- EXPIRATION_IMMEDIATE
  
  public static final int EXPIRATION_IMMEDIATE
  See Also:
  
  Constant Field Values
- EXPIRATION_NEVER
  
  public static final int EXPIRATION_NEVER
  See Also:
  
  Constant Field Values
- expirationAfter
  
  private int expirationAfter
Constructor Details
- DefaultExpirationPolicy
  
  public DefaultExpirationPolicy()
  
  Creates a new policy with default settings (expiration in 60 seconds).
- DefaultExpirationPolicy
  
  public DefaultExpirationPolicy(int expirationAfter)
  
  Creates a new policy.
  
  Parameters:
  
  expirationAfter - the expiration in seconds (a negative value means: never expire)
Method Details
- isNeverExpired
  
  private boolean isNeverExpired()
- isExpired
  
  public boolean isExpired(TimeStampProvider provider, long timestamp)
  
  Indicates whether a cache entry is expired given its creation time stamp.
  
  Specified by:
  
  isExpired in interface ExpirationPolicy
  
  Parameters:
  
  provider - the provider for new time stamps
  
  timestamp - the creation time stamp (the semantics of System.currentTimeMillis() apply)
  
  Returns:
  
  true if the entry is to be considered expired, false if not