org.biojava.bio.structure.align.util
Class AlignmentTools.IdentityMap<K>

java.lang.Object
  java.util.AbstractMap<K,K>
      org.biojava.bio.structure.align.util.AlignmentTools.IdentityMap<K>

Type Parameters:

K -

V -

All Implemented Interfaces:

java.util.Map<K,K>

Enclosing class:

AlignmentTools

public static class AlignmentTools.IdentityMap<K>
extends java.util.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

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

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

java.util.Map.Entry<K,V>

Constructor Summary

AlignmentTools.IdentityMap()

Method Summary

boolean	containsKey(java.lang.Object key)
java.util.Set<java.util.Map.Entry<K,K>>	entrySet() Always returns the empty set
K	get(java.lang.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

Constructor Detail

AlignmentTools.IdentityMap

public AlignmentTools.IdentityMap()

Method Detail

get

public K get(java.lang.Object key)

Specified by:

get in interface java.util.Map<K,K>

Overrides:

get in class java.util.AbstractMap<K,K>

Parameters:

key -

Returns:

the key

Throws:

java.lang.ClassCastException - if key is not of type K

entrySet

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

Always returns the empty set

Specified by:

entrySet in interface java.util.Map<K,K>

Specified by:

entrySet in class java.util.AbstractMap<K,K>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<K,K>

Overrides:

containsKey in class java.util.AbstractMap<K,K>