delta

Class DeltaObserver

java.lang.Object

delta.DeltaObserver

public class DeltaObserver
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected static Map	currentReferences
protected static List	fromDeltaKeys
protected static List	hasDeltaKeys
protected static Map	toDeltaIdNumbers
protected static List	toDeltaKeys

Constructor Summary

Constructors

Constructor and Description
DeltaObserver()

Method Summary

Modifier and Type	Method and Description
static void	addFromDeltaKey(Object key) Keep a record of keys whose value had fromDelta called on them.
static void	addHasDeltaKey(Object key) Keep a record of keys whose value had hasDelta called on them.
static void	addReference(DeltaObject anObj) Given a delta object, save it's object reference to a map for later validation for cloning.
static Object	addToDeltaIdNumber(long idNumber, Object key) Keep a record of toDelta id numbers received at the fromDelta calls.
static void	addToDeltaKey(Object key) Keep a record of keys whose value had toDelta called on them.
static void	clear() Clear the saved lists.
static List	getFromDeltaKeys() Return the list of keys whose value had fromDelta called on them.
static List	getHasDeltaKeys() Return the list of keys whose value had hasDelta called on them.
static Map	getReferences() Return the Map of current region references (to be used for cloning validation).
static List	getToDeltaKeys() Return the list of keys whose value had toDelta called on them.
static void	nullReference(Object key) Null the given object from the current references.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

toDeltaKeys

protected static List toDeltaKeys

fromDeltaKeys

protected static List fromDeltaKeys

hasDeltaKeys

protected static List hasDeltaKeys

toDeltaIdNumbers

protected static Map toDeltaIdNumbers

currentReferences

protected static Map currentReferences

Constructor Detail

DeltaObserver

public DeltaObserver()

Method Detail

addToDeltaKey

public static void addToDeltaKey(Object key)

Keep a record of keys whose value had toDelta called on them. Used for validation later.

addFromDeltaKey

public static void addFromDeltaKey(Object key)

Keep a record of keys whose value had fromDelta called on them. Used for validation later.

addHasDeltaKey

public static void addHasDeltaKey(Object key)

Keep a record of keys whose value had hasDelta called on them. Used for validation later.

addReference

public static void addReference(DeltaObject anObj)

Given a delta object, save it's object reference to a map for later validation for cloning. The reference is saved in a map where the key is the region key for the DeltaObject, and the value is an Object[] where [0] is an object reference obtained by the identityHashCode of the object (Integer), and [1] is a string representation of anObj.

Parameters:

anObj - The DeltaObject whose object reference is saved

nullReference

public static void nullReference(Object key)

Null the given object from the current references.

Parameters:

key - The key to null.

addToDeltaIdNumber

public static Object addToDeltaIdNumber(long idNumber,
                                        Object key)

Keep a record of toDelta id numbers received at the fromDelta calls. This is called from fromDelta to ensure that we do not call fromDelta more than once per vm with the given toDelta id number (ie the same toDelta stream). This is called from fromDelta after retrieving the toDelta id number from the stream.

Parameters:

idNumber - The id number encoded into the toDelta call, which is now being retrieved in a fromDelta call.

key - The key corresponding to the DeltaObject for the fromDelta call containing the idNumber.

getFromDeltaKeys

public static List getFromDeltaKeys()

Return the list of keys whose value had fromDelta called on them.

getToDeltaKeys

public static List getToDeltaKeys()

Return the list of keys whose value had toDelta called on them.

getHasDeltaKeys

public static List getHasDeltaKeys()

Return the list of keys whose value had hasDelta called on them.

getReferences

public static Map getReferences()

Return the Map of current region references (to be used for cloning validation).

clear

public static void clear()

Clear the saved lists.