org.biojava.nbio.structure.align.util

Class AlignmentTools.IdentityMap<K>

java.lang.Object

java.util.AbstractMap<K,K>

org.biojava.nbio.structure.align.util.AlignmentTools.IdentityMap<K>

Type Parameters:

K -

All Implemented Interfaces:

Map<K,K>

Enclosing class:

AlignmentTools

public static class AlignmentTools.IdentityMap<K>
extends AbstractMap<K,K>

A Map can be viewed as a function from K to V. This class represents the identity function. Getting a value results in the value itself.

The class is a bit inconsistent when representing its contents. On the one hand, containsKey(key) is true for all objects. However, attempting to iterate through the values returns an empty set.

Author:

Spencer Bliven

Nested Class Summary

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
IdentityMap()

Method Summary

Modifier and Type	Method and Description
boolean	containsKey(Object key)
Set<Map.Entry<K,K>>	entrySet() Always returns the empty set
K	get(Object key)

Methods inherited from class java.util.AbstractMap

clear, clone, containsValue, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, toString, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

IdentityMap

public IdentityMap()

Method Detail

get

public K get(Object key)

Specified by:

get in interface Map<K,K>

Overrides:

get in class AbstractMap<K,K>

Parameters:

key -

Returns:

the key

Throws:

ClassCastException - if key is not of type K

entrySet

public Set<Map.Entry<K,K>> entrySet()

Always returns the empty set

Specified by:

entrySet in interface Map<K,K>

Specified by:

entrySet in class AbstractMap<K,K>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,K>

Overrides:

containsKey in class AbstractMap<K,K>