org.organicdesign.fp.collections

Class AbstractUnmodMap<K,V>

java.lang.Object

org.organicdesign.fp.collections.AbstractUnmodIterable<UnmodMap.UnEntry<K,V>>

org.organicdesign.fp.collections.AbstractUnmodMap<K,V>

All Implemented Interfaces:

Iterable<UnmodMap.UnEntry<K,V>>, Map<K,V>, Sized, UnmodIterable<UnmodMap.UnEntry<K,V>>, UnmodMap<K,V>, Transformable<UnmodMap.UnEntry<K,V>>

Direct Known Subclasses:

PersistentHashMap, PersistentHashMap.MutableHashMap, PersistentTreeMap

public abstract class AbstractUnmodMap<K,V>
extends AbstractUnmodIterable<UnmodMap.UnEntry<K,V>>
implements UnmodMap<K,V>

Implements equals() and hashCode() methods compatible with java.util.Map (which ignores order) to make defining unmod Maps easier. Inherits hashCode() and toString() from AbstractUnmodIterable.

Nested Class Summary

Nested classes/interfaces inherited from interface org.organicdesign.fp.collections.UnmodMap

UnmodMap.UnEntry<K,V>

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

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
AbstractUnmodMap()

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) When comparing against a SortedMap, this is correct and O(n) fast, but BEWARE! It is also Compatible with AbstractMap.equals(Object) which unfortunately means equality as defined by this method (and java.util.AbstractMap) is not commutative when comparing ordered and unordered maps (it is also O(n log n) slow).

Methods inherited from class org.organicdesign.fp.collections.AbstractUnmodIterable

hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.organicdesign.fp.collections.UnmodMap

clear, compute, computeIfAbsent, computeIfPresent, containsValue, entrySet, isEmpty, keyIterator, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, valIterator, values

Methods inherited from interface java.util.Map

containsKey, forEach, get, getOrDefault, hashCode, size

Methods inherited from interface org.organicdesign.fp.collections.UnmodIterable

concat, drop, dropWhile, filter, flatMap, fold, foldUntil, hash, head, iterator, map, precat, take, takeWhile, toString

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface org.organicdesign.fp.xform.Transformable

toImList, toImMap, toImRrbt, toImSet, toImSortedMap, toImSortedSet, toMutableList, toMutableMap, toMutableRrbt, toMutableSet, toMutableSortedMap, toMutableSortedSet

Methods inherited from interface org.organicdesign.fp.collections.Sized

size

Constructor Detail

AbstractUnmodMap

public AbstractUnmodMap()

Method Detail

equals

public boolean equals(Object other)

When comparing against a SortedMap, this is correct and O(n) fast, but BEWARE! It is also Compatible with AbstractMap.equals(Object) which unfortunately means equality as defined by this method (and java.util.AbstractMap) is not commutative when comparing ordered and unordered maps (it is also O(n log n) slow). The Equator defined by this class prevents comparison with unordered Maps.

Specified by:

equals in interface Map<K,V>

Overrides:

equals in class Object