com.jniwrapper.util

Class SoftCache

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap

com.jniwrapper.util.SoftCache

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map

public class SoftCache
extends java.util.HashMap

SoftCache is a Map that provides caching and retrieving of objects via SoftReference. Entries put in the cache are cleared when the value objects become unreachable.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
SoftCache()
SoftCache(int initialCapacity)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	get(java.lang.Object key) Looks for the key in the cache.
java.lang.Object	put(java.lang.Object key, java.lang.Object value) Associates the passed key with the value via SoftReference.

Methods inherited from class java.util.HashMap

clear, clone, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, forEach, getOrDefault, isEmpty, keySet, merge, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

SoftCache

public SoftCache(int initialCapacity)

SoftCache

public SoftCache()

Method Detail

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Associates the passed key with the value via SoftReference.

Specified by:

put in interface java.util.Map

Overrides:

put in class java.util.HashMap

Parameters:

key - a key with which the specified value is to be associated.

value - a value to be associated with the key.

Returns:

previously associated value or null if there was no value associated, or if it became unreachable. A null value can also be returned, if it was previously associated with the key.

get

public java.lang.Object get(java.lang.Object key)

Looks for the key in the cache.

Specified by:

get in interface java.util.Map

Overrides:

get in class java.util.HashMap

Parameters:

key - a key for which the value should be returned.

Returns:

a cached object or null if the entry for the passed key is missing, or if the value become unreachable, or if the null value was associated with the key.