org.apache.openjpa.lib.util.collections

Class UnmodifiableMapEntry<K,V>

java.lang.Object

org.apache.openjpa.lib.util.collections.AbstractKeyValue<K,V>

org.apache.openjpa.lib.util.collections.AbstractMapEntry<K,V>

org.apache.openjpa.lib.util.collections.UnmodifiableMapEntry<K,V>

Type Parameters:

K - the type of keys

V - the type of mapped values

All Implemented Interfaces:

Map.Entry<K,V>, KeyValue<K,V>, Unmodifiable

public final class UnmodifiableMapEntry<K,V>
extends AbstractMapEntry<K,V>
implements Unmodifiable

A Map.Entry that throws UnsupportedOperationException when setValue is called.

Since:

3.0

Constructor Summary

Constructors

Constructor and Description
UnmodifiableMapEntry(KeyValue<? extends K,? extends V> pair) Constructs a new entry from the specified KeyValue.
UnmodifiableMapEntry(K key, V value) Constructs a new entry with the specified key and given value.
UnmodifiableMapEntry(Map.Entry<? extends K,? extends V> entry) Constructs a new entry from the specified Map.Entry.

Method Summary

Modifier and Type	Method and Description
V	setValue(V value) Throws UnsupportedOperationException.

Methods inherited from class org.apache.openjpa.lib.util.collections.AbstractMapEntry

equals, hashCode

Methods inherited from class org.apache.openjpa.lib.util.collections.AbstractKeyValue

getKey, getValue, setKey, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map.Entry

comparingByKey, comparingByKey, comparingByValue, comparingByValue, getKey, getValue

Constructor Detail

UnmodifiableMapEntry

public UnmodifiableMapEntry(K key,
                            V value)

Constructs a new entry with the specified key and given value.

Parameters:

key - the key for the entry, may be null

value - the value for the entry, may be null

UnmodifiableMapEntry

public UnmodifiableMapEntry(KeyValue<? extends K,? extends V> pair)

Constructs a new entry from the specified KeyValue.

Parameters:

pair - the pair to copy, must not be null

Throws:

NullPointerException - if the entry is null

UnmodifiableMapEntry

public UnmodifiableMapEntry(Map.Entry<? extends K,? extends V> entry)

Constructs a new entry from the specified Map.Entry.

Parameters:

entry - the entry to copy, must not be null

Throws:

NullPointerException - if the entry is null

Method Detail

setValue

public V setValue(V value)

Throws UnsupportedOperationException.

Specified by:

setValue in interface Map.Entry<K,V>

Overrides:

setValue in class AbstractMapEntry<K,V>

Parameters:

value - the new value

Returns:

the previous value

Throws:

UnsupportedOperationException - always