edu.rice.cs.plt.collect
Class EmptyMap<K,V>

java.lang.Object
  edu.rice.cs.plt.collect.EmptyMap<K,V>

All Implemented Interfaces:

LambdaMap<K,V>, Lambda<K,V>, java.io.Serializable, java.util.Map<K,V>

public class EmptyMap<K,V>
extends java.lang.Object
implements LambdaMap<K,V>, java.io.Serializable

An empty LambdaMap.

See Also:

Serialized Form

Nested Class Summary

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

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

Field Summary

static EmptyMap<java.lang.Object,java.lang.Object>

INSTANCE

Method Summary

void	clear()
boolean	containsKey(java.lang.Object o)
boolean	containsValue(java.lang.Object o)
EmptySet<java.util.Map.Entry<K,V>>	entrySet()
boolean	equals(java.lang.Object o)
V	get(java.lang.Object key)
int	hashCode()
boolean	isEmpty()
EmptySet<K>	keySet()
static <K,V> EmptyMap<K,V>	make() Return a singleton, cast to the appropriate type.
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> t)
V	remove(java.lang.Object key)
int	size()
java.lang.String	toString()
V	value(K key)
EmptySet<V>	values()

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final EmptyMap<java.lang.Object,java.lang.Object> INSTANCE

Method Detail

value

public V value(K key)

Specified by:

value in interface Lambda<K,V>

get

public V get(java.lang.Object key)

Specified by:

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

size

public int size()

Specified by:

size in interface java.util.Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,V>

containsKey

public boolean containsKey(java.lang.Object o)

Specified by:

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

containsValue

public boolean containsValue(java.lang.Object o)

Specified by:

containsValue in interface java.util.Map<K,V>

keySet

public EmptySet<K> keySet()

Specified by:

keySet in interface LambdaMap<K,V>

Specified by:

keySet in interface java.util.Map<K,V>

values

public EmptySet<V> values()

Specified by:

values in interface java.util.Map<K,V>

entrySet

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

Specified by:

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

put

public V put(K key,
             V value)

Specified by:

put in interface java.util.Map<K,V>

putAll

public void putAll(java.util.Map<? extends K,? extends V> t)

Specified by:

putAll in interface java.util.Map<K,V>

remove

public V remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<K,V>

clear

public void clear()

Specified by:

clear in interface java.util.Map<K,V>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Map<K,V>

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Map<K,V>

Overrides:

hashCode in class java.lang.Object

make

public static <K,V> EmptyMap<K,V> make()

Return a singleton, cast to the appropriate type.