org.apache.jackrabbit.spi.commons.util
Class StringCache

java.lang.Object
  org.apache.jackrabbit.spi.commons.util.StringCache

public class StringCache
extends java.lang.Object

A few String utility functions.

Field Summary

static boolean	OBJECT_CACHE
static int	OBJECT_CACHE_SIZE

Method Summary

static java.lang.String	cache(java.lang.String s) Get the string from the cache if possible.
static void	clearCache() Clear the cache.
static java.lang.String	fromCacheOrNew(java.lang.String s) Get a string from the cache, and if no such string has been found, create a new one with only this content.

Methods inherited from class java.lang.Object

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

Field Detail

OBJECT_CACHE

public static final boolean OBJECT_CACHE

OBJECT_CACHE_SIZE

public static final int OBJECT_CACHE_SIZE

Method Detail

cache

public static java.lang.String cache(java.lang.String s)

Get the string from the cache if possible. If the string has not been found, it is added to the cache. If there is such a string in the cache, that one is returned.

Parameters:

s - the original string

Returns:

a string with the same content, if possible from the cache

fromCacheOrNew

public static java.lang.String fromCacheOrNew(java.lang.String s)

Get a string from the cache, and if no such string has been found, create a new one with only this content. This solves out of memory problems if the string is a substring of another, large string. In Java, strings are shared, which could lead to memory problems. This avoid such problems.

Parameters:

s - the string

Returns:

a string that is guaranteed not be a substring of a large string

clearCache

public static void clearCache()

Clear the cache. This method is used for testing.