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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.core.persist

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.cougaar.core.persist .IdentityTable

IdentityTable
class IdentityTable (Code)
	Identifies all objects that have been (or are about to be) written to persistence media. This purpose of this table is to remember objects that have persisted in previous persistence snapshots so that references to such objects in subsequent persistence deltas can be replaced with references to the previously persisted objects. This is similar to the wire handle of the Java serialization process (ObjectOutputStream), but applies across persistence snapshots whereas the wire handle applies within a single snapshot. This class is essentially a hash table implementation. It differs from the java.util versions of hash tables in that the values are WeakReference s so that values to which there are no longer any references get removed from the table. WeakHashMap has weak keys, not weak values.

Inner Class :static class MyArrayList extends ArrayList

Constructor Summary
	IdentityTable(Logger logger)

Method Summary
public void	clear()
public PersistenceAssociation	create(Object o, PersistenceReference ref) Create a new PersistenceAssociation and enter it into the table. Parameters: o - the object of the PersistenceAssociation Parameters: ref - The PersistenceReference of the object.
public PersistenceAssociation	find(Object object) Find the PersistenceAssociation for an object.
public PersistenceAssociation	findOrCreate(Object o) Assign an identity to the given object.
public PersistenceAssociation	get(PersistenceReference ref) Get the PersistenceAssociation corresponding to a PersistenceReference.
public PersistenceAssociation	get(int ix) Get the PersistenceAssociation at a particular index.
public int	getNextId()
public Iterator	iterator()
public void	setNextId(int newNextId)
public void	setRehydrationCollection(Collection list)
public int	size()

Constructor Detail

IdentityTable
IdentityTable(Logger logger)(Code)

Method Detail

clear
public void clear()(Code)

create
public PersistenceAssociation create(Object o, PersistenceReference ref)(Code)
	Create a new PersistenceAssociation and enter it into the table. Parameters: o - the object of the PersistenceAssociation Parameters: ref - The PersistenceReference of the object. the new PersistenceAssociation

find
public PersistenceAssociation find(Object object)(Code)
	Find the PersistenceAssociation for an object. Parameters: object - the object the PersistenceAssociation for the object null if the object has no current association

findOrCreate
public PersistenceAssociation findOrCreate(Object o)(Code)
	Assign an identity to the given object. Makes an entry in the identityTable if not already there and marks the entry as "needing to be written". The next time the ObjectOutputStream.replaceObject method is called for the object it will be written. Thereafter, a reference object will be written.

get
public PersistenceAssociation get(PersistenceReference ref)(Code)
	Get the PersistenceAssociation corresponding to a PersistenceReference. Parameters: ref - the PersistenceReference the corresponding PersistenceAssociation null if the is no corresponding PersistenceAssociation

get
public PersistenceAssociation get(int ix)(Code)
	Get the PersistenceAssociation at a particular index. Parameters: ix - the index the corresponding PersistenceAssociation null if the is no corresponding PersistenceAssociation

getNextId
public int getNextId()(Code)

iterator
public Iterator iterator()(Code)

setNextId
public void setNextId(int newNextId)(Code)

setRehydrationCollection
public void setRehydrationCollection(Collection list)(Code)

size
public int size()(Code)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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