org.apache.openjpa.util
Class ProxyHashSet

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet<E>
          java.util.HashSet
              org.apache.openjpa.util.ProxyHashSet

All Implemented Interfaces:

Serializable, Cloneable, Iterable, Collection, Set, Proxy, ProxyCollection

public class ProxyHashSet
extends HashSet
implements ProxyCollection

Extension of the HashSet type that dirties the persistent/transactional field it is assigned to on modification. The need to dirty the field on any modification mandates that this class must override all mutator methods of the base type. This may lead to multiple calls to dirty for one state change if one mutator method of the base type calls another.

Author:

Abe White

See Also:

Serialized Form

Constructor Summary

ProxyHashSet()

ProxyHashSet(Class elementType, boolean trackChanges, OpenJPAConfiguration conf)

Method Summary

boolean	add(Object value)
boolean	addAll(Collection values)
void	clear()
Object	copy(Object orig) Return an unproxied copy of the given instance.
ChangeTracker	getChangeTracker() Return the change tracker for this proxy, or null if none.
OpenJPAStateManager	getOwner() Return the owning object.
int	getOwnerField() Return the owning field index.
Iterator	iterator()
ProxyCollection	newInstance(Class elementType, Comparator compare, boolean trackChanges, OpenJPAConfiguration conf) This method should return a new proxy of the same concrete type as the implementing class.
boolean	remove(Object o)
boolean	removeAll(Collection c)
boolean	retainAll(Collection c)
void	setOwner(OpenJPAStateManager sm, int field) Reset the state of the proxy, and set the owning instance of the proxy and the name of the field it is assigned to.
protected Object	writeReplace()

Methods inherited from class java.util.HashSet

clone, contains, isEmpty, size

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

containsAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

containsAll, equals, hashCode, toArray, toArray

Constructor Detail

ProxyHashSet

public ProxyHashSet()

ProxyHashSet

public ProxyHashSet(Class elementType,
                    boolean trackChanges,
                    OpenJPAConfiguration conf)

Method Detail

setOwner

public void setOwner(OpenJPAStateManager sm,
                     int field)

Description copied from interface: Proxy

Reset the state of the proxy, and set the owning instance of the proxy and the name of the field it is assigned to. Set to null to indicate that the proxy is no longer managed.

Specified by:

setOwner in interface Proxy

getOwner

public OpenJPAStateManager getOwner()

Description copied from interface: Proxy

Return the owning object.

Specified by:

getOwner in interface Proxy

getOwnerField

public int getOwnerField()

Description copied from interface: Proxy

Return the owning field index.

Specified by:

getOwnerField in interface Proxy

getChangeTracker

public ChangeTracker getChangeTracker()

Description copied from interface: Proxy

Return the change tracker for this proxy, or null if none.

Specified by:

getChangeTracker in interface Proxy

copy

public Object copy(Object orig)

Description copied from interface: Proxy

Return an unproxied copy of the given instance. This method is used by proxy managers to create backup values for use in rollback.

Specified by:

copy in interface Proxy

newInstance

public ProxyCollection newInstance(Class elementType,
                                   Comparator compare,
                                   boolean trackChanges,
                                   OpenJPAConfiguration conf)

Description copied from interface: ProxyCollection

This method should return a new proxy of the same concrete type as the implementing class. Used by the ProxyManager factories: one template instance of each type is created for the purpose of producing new instances via this method. Overcomes the performance penalties of reflection.

Specified by:

newInstance in interface ProxyCollection

add

public boolean add(Object value)

Specified by:

add in interface Collection

Specified by:

add in interface Set

Overrides:

add in class HashSet

addAll

public boolean addAll(Collection values)

Specified by:

addAll in interface Collection

Specified by:

addAll in interface Set

Overrides:

addAll in class AbstractCollection

clear

public void clear()

Specified by:

clear in interface Collection

Specified by:

clear in interface Set

Overrides:

clear in class HashSet

iterator

public Iterator iterator()

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Set

Overrides:

iterator in class HashSet

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection

Specified by:

remove in interface Set

Overrides:

remove in class HashSet

removeAll

public boolean removeAll(Collection c)

Specified by:

removeAll in interface Collection

Specified by:

removeAll in interface Set

Overrides:

removeAll in class AbstractSet

retainAll

public boolean retainAll(Collection c)

Specified by:

retainAll in interface Collection

Specified by:

retainAll in interface Set

Overrides:

retainAll in class AbstractCollection

writeReplace

protected Object writeReplace()
                       throws ObjectStreamException

Throws:

ObjectStreamException