Package org.apache.oro.util

Class GenericCache

java.lang.Object
org.apache.oro.util.GenericCache
All Implemented Interfaces:
Serializable, Cache
Direct Known Subclasses:
CacheFIFO, CacheFIFO2, CacheLRU, CacheRandom
public abstract class GenericCache extends Object implements Cache, Serializable
This is the base class for all cache implementations provided in the org.apache.oro.util package. To derive a subclass from GenericCache only the ... methods need be overridden. Although 4 subclasses of GenericCache are provided with this package, users may not derive subclasses from this class. Rather, users should create their own implmentations of the Cache interface.
Since:
1.0
Version:
2.0.8
See Also:

  • Field Details

    • DEFAULT_CAPACITY

      public static final int DEFAULT_CAPACITY
      The default capacity to be used by the GenericCache subclasses provided with this package. Its value is 20.
      See Also:

  • Method Details

    • addElement

      public abstract void addElement(Object key, Object value)
      Specified by:
      addElement in interface Cache

    • getElement

      public Object getElement(Object key)
      Specified by:
      getElement in interface Cache

    • keys

      public final Iterator keys()

    • size

      public final int size()
      Returns the number of elements in the cache, not to be confused with the capacity() which returns the number of elements that can be held in the cache at one time.

      Specified by:
      size in interface Cache
      Returns:
      The current size of the cache (i.e., the number of elements currently cached).

    • capacity

      public final int capacity()
      Returns the maximum number of elements that can be cached at one time.

      Specified by:
      capacity in interface Cache
      Returns:
      The maximum number of elements that can be cached at one time.

    • isFull

      public final boolean isFull()