Module openj9.dtfj

Package com.ibm.j9ddr.corereaders.tdump.zebedee.util

Class IntegerLruCache

java.lang.Object

com.ibm.j9ddr.corereaders.tdump.zebedee.util.AbstractHashMap

com.ibm.j9ddr.corereaders.tdump.zebedee.util.AbstractLruCache

com.ibm.j9ddr.corereaders.tdump.zebedee.util.IntegerLruCache

All Implemented Interfaces:

Serializable

public final class IntegerLruCache
extends AbstractLruCache

This class provides an LRU (Least Recently Used) cache which maps integer keys to int values. See the description in the superclass AbstractLruCache for more details. Like its sibling IntegerMap it is low footprint. Note that the value -1 is not allowed (see discussion in IntegerMap).

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
IntegerLruCache(int maxSize)	Create a new IntegerLruCache.

Method Summary

Modifier and Type	Method	Description
int	get(long key)	Returns the value mapped by the given key.
static void	main(String[] args)	Run some basic tests on this class.
void	put(long key, int value)	Add the key/value pair to the map.

Methods declared in class com.ibm.j9ddr.corereaders.tdump.zebedee.util.AbstractLruCache

getIndexAndPromote, putIndexAndPromote

Methods declared in class com.ibm.j9ddr.corereaders.tdump.zebedee.util.AbstractHashMap

getKeys, getKeysArray, size

Methods declared in class java.lang.Object

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

Constructor Details

IntegerLruCache

public IntegerLruCache(int maxSize)

Create a new IntegerLruCache.

Parameters:

maxSize - the maximum size the cache can grow to

Method Details

get

public int get(long key)

Returns the value mapped by the given key. Also promotes this key to the most recently used.

Returns:

the value or -1 if it cannot be found

put

public void put(long key,
 int value)

Add the key/value pair to the map. The value must not be -1.

main

public static void main(String[] args)

Run some basic tests on this class.