class ReferenceSerializedForm<T> extends Object implements Referrer<T>, Serializable
Modifier and Type | Field and Description |
---|---|
private int |
hash |
private T |
obj |
private static long |
serialVersionUID |
Constructor and Description |
---|
ReferenceSerializedForm() |
ReferenceSerializedForm(T t) |
Modifier and Type | Method and Description |
---|---|
void |
clear() |
boolean |
enqueue() |
boolean |
equals(Object o)
Equals is calculated on IDENTITY or EQUALITY.
|
T |
get() |
int |
hashCode()
Standard hashCode calculation for IDENTITY based references, where k
is the referent.
|
boolean |
isEnqueued() |
private void |
readObject(ObjectInputStream in) |
private void |
writeObject(ObjectOutputStream out) |
private static final long serialVersionUID
private T obj
private transient int hash
ReferenceSerializedForm()
ReferenceSerializedForm(T t)
public T get()
get
in interface Referrer<T>
Reference.get()
public void clear()
clear
in interface Referrer<T>
Reference.clear()
public boolean isEnqueued()
isEnqueued
in interface Referrer<T>
Reference.isEnqueued()
public boolean enqueue()
enqueue
in interface Referrer<T>
Reference.enqueue()
public boolean equals(Object o)
Referrer
Equals is calculated on IDENTITY or EQUALITY.
IDENTITY calculation:
if (this == o) return true;
if (!(o instanceof Referrer)) return false;
Object k1 = get();
Object k2 = ((Referrer) o).get();
if ( k1 != null && k1 == k2 ) return true;
return ( k1 == null && k2 == null && hashCode() == o.hashCode());
if (this == o) return true; // Same reference.
if (!(o instanceof Referrer)) return false;
Object k1 = get();
Object k2 = ((Referrer) o).get();
if ( k1 != null && k1.equals(k2)) return true;
return ( k1 == null && k2 == null && hashCode() == o.hashCode());
public int hashCode()
Referrer
Standard hashCode calculation for IDENTITY based references, where k is the referent. This may be stored in a final field:
int hash = 7;
hash = 29 * hash + System.identityHashCode(k);
hash = 29 * hash + k.getClass().hashCode();
Standard hashCode calculation for EQUALITY based references, where k is the referent:
int hash = 7;
hash = 29 * hash + k.hashCode();
hash = 29 * hash + k.getClass().hashCode();
The hash must be calculated during construction and if the reference is cleared, the recorded hashCode returned. While the referent remains reachable the hashCode must be calculated each time.
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
private void writeObject(ObjectOutputStream out) throws IOException
IOException
Copyright 2007-2013, multiple authors.
Licensed under the Apache License, Version 2.0, see the NOTICE file for attributions.