com.scvngr.levelup.core.ui.view

Class HashMapCache

java.lang.Object

com.scvngr.levelup.core.ui.view.HashMapCache

All Implemented Interfaces:

LevelUpCodeCache

@ThreadSafe
public final class HashMapCache
extends Object
implements LevelUpCodeCache

A simple in-memory cache of the codes. The cache is static, so it'll be shared across all instances of this class.

Constructor Summary

Constructors

Constructor and Description
HashMapCache()

Method Summary

Modifier and Type	Method and Description
LevelUpQrCodeGenerator.LevelUpQrCodeImage	getCode(String key)
boolean	hasCode(String key)
void	putCode(String key, LevelUpQrCodeGenerator.LevelUpQrCodeImage image)

Methods inherited from class java.lang.Object

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

Constructor Detail

HashMapCache

public HashMapCache()

Method Detail

putCode

public void putCode(String key,
                    LevelUpQrCodeGenerator.LevelUpQrCodeImage image)

Specified by:

putCode in interface LevelUpCodeCache

Parameters:

key - the key under which to store the code. This should be unique for each code.

image - the code image. This should be the smallest-possible code image.

getCode

public LevelUpQrCodeGenerator.LevelUpQrCodeImage getCode(String key)

Specified by:

getCode in interface LevelUpCodeCache

Parameters:

key - the key under which the image is stored.

Returns:

the cached code image or null if there is no entry.

hasCode

public boolean hasCode(String key)

Specified by:

hasCode in interface LevelUpCodeCache

Parameters:

key - the key under which the image is stored.

Returns:

true if the cache has a mapping for the given key.