oracle.ucp.util

Class MappedGetter<KEY,VALUE>

java.lang.Object

oracle.ucp.util.MappedGetter<KEY,VALUE>

public class MappedGetter<KEY,VALUE>
extends Object

This class is a simple map that does nothing but gets a value for a given key. If there is no key, it inserts an entry for a key. The class is thread-safe: This class synchronization is based on ReentrantReadWriteLock, so for better performance it assumes a lot of reads while small amount of writes

Constructor Summary

Constructors

Constructor and Description
MappedGetter()

Method Summary

Modifier and Type	Method and Description
VALUE	computeIfAbsent(KEY key, java.util.function.Function<? super KEY,? extends VALUE> mappingFunction) Retrieve VALUE by a given KEY if no such entry, compute a value and insert an entry
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

MappedGetter

public MappedGetter()

Method Detail

computeIfAbsent

public VALUE computeIfAbsent(KEY key,
                             java.util.function.Function<? super KEY,? extends VALUE> mappingFunction)

Retrieve VALUE by a given KEY if no such entry, compute a value and insert an entry

Parameters:

key - connection retrieval information

mappingFunction - function to compute new value

Returns:

connection retrieval stats

toString

public String toString()

Overrides:

toString in class Object