org.arp.javautil.map

Class ImnuMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

org.arp.javautil.map.ImnuMap<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class ImnuMap<K,V>
extends HashMap<K,V>

ImnuMap is a HashMap that specifies a default value for keys that are not in the map. The default value is specified through an interface called DefaultValue that defines one method: defaultValue. defaultValue accepts the key as an argument, so an implementing class can decide what default value should be returned based on the supplied key. While there are many ways of providing a default value for missing keys, the name of this class enshrines the fact that the design of this particular implementation was suggested by Himanshu Rathod. Specifically, {IMNU} = {HIMANSHU} - {HASH}. In other words, ImnuMap is the difference between Himanshu's suggestion and a plain ol' HashMap.

Author:

Michel Mansour

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ImnuMap.DefaultValue<V>

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
ImnuMap() Creates a new ImnuMap instance that returns null for all missing keys.
ImnuMap(ImnuMap.DefaultValue<V> defaultValue)

Method Summary

Modifier and Type	Method and Description
V	get(Object key)

Methods inherited from class java.util.HashMap

clear, clone, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, forEach, getOrDefault, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

ImnuMap

public ImnuMap(ImnuMap.DefaultValue<V> defaultValue)

ImnuMap

public ImnuMap()

Creates a new ImnuMap instance that returns null for all missing keys.

Method Detail

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class HashMap<K,V>