rabbit.util
Class StringCache

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.WeakHashMap<String,WeakReference<String>>
          rabbit.util.StringCache

All Implemented Interfaces:

Map<String,WeakReference<String>>

public class StringCache
extends WeakHashMap<String,WeakReference<String>>

A cache for strings. The cache is weak so GC can happen quickly. String.intern may seem similar, but String.intern is a hard cache, that is no GC will remove interned strings.

Author:

Robert Olofsson

Nested Class Summary

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

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

Constructor Summary

StringCache()

Method Summary

String	getCachedString(String s) Get a cached string with the same contents as the given string.
static StringCache	getSharedInstance() Get the shared instance of the string caches.

Methods inherited from class java.util.WeakHashMap

clear, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

clone, 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

StringCache

public StringCache()

Method Detail

getSharedInstance

public static StringCache getSharedInstance()

Get the shared instance of the string caches.

getCachedString

public String getCachedString(String s)

Get a cached string with the same contents as the given string. If the string given is not null then the cache will hold one entry with the same value as the given string after this method has completed.

Parameters:

s - the string to get a shared string for.