Module openj9.dtfj

Package com.ibm.dtfj.corereaders.zos.util

Class ObjectLruCache

java.lang.Object

com.ibm.dtfj.corereaders.zos.util.AbstractHashMap

com.ibm.dtfj.corereaders.zos.util.AbstractLruCache

com.ibm.dtfj.corereaders.zos.util.ObjectLruCache

All Implemented Interfaces:

Serializable

public final class ObjectLruCache
extends AbstractLruCache

This class provides an LRU (Least Recently Used) cache which maps integer keys to object values. See the description in the superclass AbstractLruCache for more details.

See Also:

• Serialized Form

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
Object	get(long key)	Returns the value mapped by the given key.
void	put(long key, Object value)	Add the key/value pair to the map.

Methods declared in class com.ibm.dtfj.corereaders.zos.util.AbstractLruCache

getIndexAndPromote, putIndexAndPromote

Methods declared in class com.ibm.dtfj.corereaders.zos.util.AbstractHashMap

getKeys, getKeysArray

Methods declared in class java.lang.Object

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

Constructor Details

ObjectLruCache

public ObjectLruCache(int maxSize)

Create a new ObjectLruCache.

Parameters:

maxSize - the maximum size the cache can grow to

Method Details

get

public Object get(long key)

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

Returns:

the value or null if it cannot be found

put

public void put(long key,
 Object value)

Add the key/value pair to the map.