org.glassfish.jersey.internal.guava

Class ForwardingMapEntry<K,V>

java.lang.Object

org.glassfish.jersey.internal.guava.ForwardingMapEntry<K,V>

All Implemented Interfaces:

Map.Entry<K,V>

public abstract class ForwardingMapEntry<K,V>
extends Object
implements Map.Entry<K,V>

A map entry which forwards all its method calls to another map entry. Subclasses should override one or more methods to modify the behavior of the backing map entry as desired per the decorator pattern.

Warning: The methods of ForwardingMapEntry forward indiscriminately to the methods of the delegate. For example, overriding getValue() alone will not change the behavior of equals(java.lang.Object), which can lead to unexpected behavior. In this case, you should override equals as well, either providing your own implementation, or delegating to the provided standardEquals method.

Each of the standard methods, where appropriate, use Objects#equal to test equality for both keys and values. This may not be the desired behavior for map implementations that use non-standard notions of key equality, such as the entry of a SortedMap whose comparator is not consistent with equals.

The standard methods are not guaranteed to be thread-safe, even when all of the methods that they depend on are thread-safe.

Since:

2.0 (imported from Google Collections Library)

Author:

Mike Bostock, Louis Wasserman

Method Summary

Modifier and Type	Method and Description
protected abstract Map.Entry<K,V>	delegate() Returns the backing delegate instance that methods are forwarded to.
boolean	equals(Object object)
K	getKey()
V	getValue()
int	hashCode()
V	setValue(V value)
String	toString() Returns the string representation generated by the delegate's toString method.

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

Method Detail

delegate

protected abstract Map.Entry<K,V> delegate()

Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.

getKey

public K getKey()

Specified by:

getKey in interface Map.Entry<K,V>

getValue

public V getValue()

Specified by:

getValue in interface Map.Entry<K,V>

setValue

public V setValue(V value)

Specified by:

setValue in interface Map.Entry<K,V>

equals

public boolean equals(Object object)

Specified by:

equals in interface Map.Entry<K,V>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map.Entry<K,V>

Overrides:

hashCode in class Object

toString

public String toString()

Returns the string representation generated by the delegate's toString method.

Overrides:

toString in class Object