AlignmentTools.IdentityMap (biojava 6.1.0 API)

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 extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>
- Nested classes/interfaces inherited from interface java.util.Map
  Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors
Constructor Description

IdentityMap()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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>