Package org.hibernate.collection.spi

Class PersistentSet<E>

java.lang.Object

org.hibernate.collection.spi.AbstractPersistentCollection<E>

org.hibernate.collection.spi.PersistentSet<E>

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, Set<E>, LazyInitializable, PersistentCollection<E>

Direct Known Subclasses:

PersistentSortedSet

@Incubating
public class PersistentSet<E>
extends AbstractPersistentCollection<E>
implements Set<E>

A persistent wrapper for a Set. The underlying collection is a HashSet.

Author:

Gavin King

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.hibernate.collection.spi.AbstractPersistentCollection

AbstractPersistentCollection.AbstractValueDelayedOperation, AbstractPersistentCollection.DelayedOperation<E>, AbstractPersistentCollection.IteratorProxy<E>, AbstractPersistentCollection.LazyInitializationWork<T>, AbstractPersistentCollection.ListIteratorProxy, AbstractPersistentCollection.ListProxy, AbstractPersistentCollection.SetProxy<E>, AbstractPersistentCollection.ValueDelayedOperation<E>

Field Summary

Fields

Modifier and Type	Field	Description
protected Set<E>	set

Fields inherited from class org.hibernate.collection.spi.AbstractPersistentCollection

elementRemoved, UNKNOWN

Constructor Summary

Constructors

Constructor	Description
PersistentSet()	Empty constructor.
PersistentSet(SharedSessionContractImplementor session)	Constructor matching super.
PersistentSet(SharedSessionContractImplementor session, Set<E> set)	Instantiates a non-lazy set (the underlying set is constructed from the incoming set reference).

Method Summary

Modifier and Type	Method	Description
boolean	add(E value)
boolean	addAll(Collection<? extends E> coll)
void	clear()
boolean	contains(Object object)
boolean	containsAll(Collection<?> coll)
Object	disassemble(CollectionPersister persister)	Disassemble the collection to get it ready for the cache
boolean	empty()	Is the collection empty?
Iterator<E>	entries(CollectionPersister persister)	Iterate all collection entries, during update of the database
boolean	entryExists(Object key, int i)	Does the given element/entry exist in the collection?
boolean	equals(Object other)
boolean	equalsSnapshot(CollectionPersister persister)	Does the current state exactly match the snapshot?
Iterator<?>	getDeletes(CollectionPersister persister, boolean indexIsFormula)	Get all the elements that need deleting
Object	getElement(Object entry)	Get the value of the given collection entry.
Object	getIndex(Object entry, int i, CollectionPersister persister)	Get the index of the given collection entry
Collection<E>	getOrphans(Serializable snapshot, String entityName)	get all "orphaned" elements
Serializable	getSnapshot(CollectionPersister persister)	Return a new snapshot of the current state of the collection
Object	getSnapshotElement(Object entry, int i)	Get the snapshot value of the given collection entry
int	hashCode()
void	initializeEmptyCollection(CollectionPersister persister)
void	initializeFromCache(CollectionPersister persister, Object disassembled, Object owner)	Read the state of the collection from a disassembled cached value
void	injectLoadedState(PluralAttributeMapping attributeMapping, List<?> loadingStateList)	Inject the state loaded for a collection instance.
boolean	isEmpty()
boolean	isRowUpdatePossible()	Can each element in the collection be mapped unequivocally to a single row in the database?
boolean	isSnapshotEmpty(Serializable snapshot)	Is the snapshot empty?
boolean	isWrapper(Object collection)	Is this the wrapper for the given collection instance?
Iterator<E>	iterator()
boolean	needsInserting(Object entry, int i, Type elemType)	Do we need to insert this element?
boolean	needsUpdating(Object entry, int i, Type elemType)	Do we need to update this element?
boolean	remove(Object value)
boolean	removeAll(Collection<?> coll)
boolean	retainAll(Collection<?> coll)
int	size()
Object[]	toArray()
<A> A[]	toArray(A[] array)
String	toString()

Methods inherited from class org.hibernate.collection.spi.AbstractPersistentCollection

afterInitialize, afterRowInsert, beforeInitialize, beginRead, clearDirty, clearOperationQueue, dirty, elementByIndex, elementExists, endRead, forceInitialization, getCachedSize, getIdentifier, getKey, getOrphans, getOwner, getQueuedOrphans, getRole, getSession, getSize, getSnapshot, getStoredSnapshot, getValue, hasQueuedOperations, identityRemove, initialize, isClearQueueEnabled, isConnectedToSession, isDirectlyAccessible, isDirty, isElementRemoved, isInitialized, isInitializing, isInverseCollection, isInverseCollectionNoOrphanDelete, isInverseOneToManyOrNoOrphanDelete, isOperationQueueEnabled, isPutQueueEnabled, isUnreferenced, needsRecreate, performQueuedOperations, postAction, preInsert, prepareForPossibleLoadingOutsideTransaction, queuedAdditionIterator, queueOperation, read, readElementByIndex, readElementExistence, readIndexExistence, readSize, replaceQueuedOperationValues, setCurrentSession, setDirectlyAccessible, setInitialized, setOwner, setSnapshot, unsetSession, wasInitialized, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.hibernate.collection.spi.PersistentCollection

includeInInsert, includeInRecreate, isDirectlyProvidedCollection, isNewlyInstantiated, needsUpdating, render

Methods inherited from interface java.util.Set

spliterator

Field Details

set

protected Set<E> set

Constructor Details

PersistentSet

public PersistentSet()

Empty constructor.

Note: this form is not ever ever ever used by Hibernate; it is, however, needed for SOAP libraries and other such marshalling code.

PersistentSet

public PersistentSet(SharedSessionContractImplementor session)

Constructor matching super. Instantiates a lazy set (the underlying set is un-initialized).

Parameters:

session - The session to which this set will belong.

PersistentSet

public PersistentSet(SharedSessionContractImplementor session,
 Set<E> set)

Instantiates a non-lazy set (the underlying set is constructed from the incoming set reference).

Parameters:

session - The session to which this set will belong.

set - The underlying set data.

Method Details

getSnapshot

public Serializable getSnapshot(CollectionPersister persister)
                         throws HibernateException

Description copied from interface: PersistentCollection

Return a new snapshot of the current state of the collection

Specified by:

getSnapshot in interface PersistentCollection<E>

Parameters:

persister - The collection persister

Returns:

The snapshot

Throws:

HibernateException

getOrphans

public Collection<E> getOrphans(Serializable snapshot,
 String entityName)
                         throws HibernateException

Description copied from interface: PersistentCollection

get all "orphaned" elements

Specified by:

getOrphans in interface PersistentCollection<E>

Specified by:

getOrphans in class AbstractPersistentCollection<E>

Parameters:

snapshot - The snapshot state

entityName - The name of the entity that are the elements of the collection

Returns:

The orphans

Throws:

HibernateException

initializeEmptyCollection

public void initializeEmptyCollection(CollectionPersister persister)

Specified by:

initializeEmptyCollection in interface PersistentCollection<E>

equalsSnapshot

public boolean equalsSnapshot(CollectionPersister persister)
                       throws HibernateException

Description copied from interface: PersistentCollection

Does the current state exactly match the snapshot?

Specified by:

equalsSnapshot in interface PersistentCollection<E>

Parameters:

persister - The collection persister

Returns:

true if the current state and the snapshot state match.

Throws:

HibernateException

isSnapshotEmpty

public boolean isSnapshotEmpty(Serializable snapshot)

Description copied from interface: PersistentCollection

Is the snapshot empty?

Specified by:

isSnapshotEmpty in interface PersistentCollection<E>

Parameters:

snapshot - The snapshot to check

Returns:

true if the given snapshot is empty

initializeFromCache

public void initializeFromCache(CollectionPersister persister,
 Object disassembled,
 Object owner)
                         throws HibernateException

Description copied from interface: PersistentCollection

Read the state of the collection from a disassembled cached value

Specified by:

initializeFromCache in interface PersistentCollection<E>

Parameters:

persister - The collection persister

disassembled - The disassembled cached state

owner - The collection owner

Throws:

HibernateException

empty

public boolean empty()

Description copied from interface: PersistentCollection

Is the collection empty? (don't try to initialize the collection)

Specified by:

empty in interface PersistentCollection<E>

Specified by:

empty in class AbstractPersistentCollection<E>

Returns:

false if the collection is non-empty; true otherwise.

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in interface Set<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<E>

Specified by:

isEmpty in interface Set<E>

contains

public boolean contains(Object object)

Specified by:

contains in interface Collection<E>

Specified by:

contains in interface Set<E>

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in interface Set<E>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<E>

Specified by:

toArray in interface Set<E>

toArray

public <A> A[] toArray(A[] array)

Specified by:

toArray in interface Collection<E>

Specified by:

toArray in interface Set<E>

add

public boolean add(E value)

Specified by:

add in interface Collection<E>

Specified by:

add in interface Set<E>

remove

public boolean remove(Object value)

Specified by:

remove in interface Collection<E>

Specified by:

remove in interface Set<E>

containsAll

public boolean containsAll(Collection<?> coll)

Specified by:

containsAll in interface Collection<E>

Specified by:

containsAll in interface Set<E>

addAll

public boolean addAll(Collection<? extends E> coll)

Specified by:

addAll in interface Collection<E>

Specified by:

addAll in interface Set<E>

retainAll

public boolean retainAll(Collection<?> coll)

Specified by:

retainAll in interface Collection<E>

Specified by:

retainAll in interface Set<E>

removeAll

public boolean removeAll(Collection<?> coll)

Specified by:

removeAll in interface Collection<E>

Specified by:

removeAll in interface Set<E>

clear

public void clear()

Specified by:

clear in interface Collection<E>

Specified by:

clear in interface Set<E>

toString

public String toString()

Overrides:

toString in class Object

injectLoadedState

public void injectLoadedState(PluralAttributeMapping attributeMapping,
 List<?> loadingStateList)

Description copied from interface: PersistentCollection

Inject the state loaded for a collection instance.

Specified by:

injectLoadedState in interface PersistentCollection<E>

entries

public Iterator<E> entries(CollectionPersister persister)

Description copied from interface: PersistentCollection

Iterate all collection entries, during update of the database

Specified by:

entries in interface PersistentCollection<E>

Parameters:

persister - The collection persister.

Returns:

The iterator

disassemble

public Object disassemble(CollectionPersister persister)
                   throws HibernateException

Description copied from interface: PersistentCollection

Disassemble the collection to get it ready for the cache

Specified by:

disassemble in interface PersistentCollection<E>

Parameters:

persister - The collection persister

Returns:

The disassembled state

Throws:

HibernateException

getDeletes

public Iterator<?> getDeletes(CollectionPersister persister,
 boolean indexIsFormula)
                       throws HibernateException

Description copied from interface: PersistentCollection

Get all the elements that need deleting

Specified by:

getDeletes in interface PersistentCollection<E>

Parameters:

persister - The collection persister

indexIsFormula - For indexed collections, tells whether the index is a formula (calculated value) mapping

Returns:

An iterator over the elements to delete

Throws:

HibernateException

needsInserting

public boolean needsInserting(Object entry,
 int i,
 Type elemType)
                       throws HibernateException

Description copied from interface: PersistentCollection

Do we need to insert this element?

Specified by:

needsInserting in interface PersistentCollection<E>

Parameters:

entry - The collection element to check

i - The index (for indexed collections)

elemType - The type for the element

Returns:

true if the element needs inserting

Throws:

HibernateException

needsUpdating

public boolean needsUpdating(Object entry,
 int i,
 Type elemType)

Description copied from interface: PersistentCollection

Do we need to update this element?

Specified by:

needsUpdating in interface PersistentCollection<E>

Parameters:

entry - The collection element to check

i - The index (for indexed collections)

elemType - The type for the element

Returns:

true if the element needs updating

isRowUpdatePossible

public boolean isRowUpdatePossible()

Description copied from interface: PersistentCollection

Can each element in the collection be mapped unequivocally to a single row in the database? Generally bags and sets are the only collections that cannot be.

Specified by:

isRowUpdatePossible in interface PersistentCollection<E>

Overrides:

isRowUpdatePossible in class AbstractPersistentCollection<E>

Returns:

true if the row for each element is known

getIndex

public Object getIndex(Object entry,
 int i,
 CollectionPersister persister)

Description copied from interface: PersistentCollection

Get the index of the given collection entry

Specified by:

getIndex in interface PersistentCollection<E>

Parameters:

entry - The collection entry/element

i - The assumed index

persister - it was more elegant before we added this...

Returns:

The index value

getElement

public Object getElement(Object entry)

Description copied from interface: PersistentCollection

Get the value of the given collection entry. Generally the given entry parameter value will just be returned. Might get a different value for a duplicate entries in a Set.

Specified by:

getElement in interface PersistentCollection<E>

Parameters:

entry - The object instance for which to get the collection element instance.

Returns:

The corresponding object that is part of the collection elements.

getSnapshotElement

public Object getSnapshotElement(Object entry,
 int i)

Description copied from interface: PersistentCollection

Get the snapshot value of the given collection entry

Specified by:

getSnapshotElement in interface PersistentCollection<E>

Parameters:

entry - The entry

i - The index

Returns:

The snapshot state for that element

equals

public boolean equals(Object other)

Specified by:

equals in interface Collection<E>

Specified by:

equals in interface Set<E>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<E>

Specified by:

hashCode in interface Set<E>

Overrides:

hashCode in class Object

entryExists

public boolean entryExists(Object key,
 int i)

Description copied from interface: PersistentCollection

Does the given element/entry exist in the collection?

Specified by:

entryExists in interface PersistentCollection<E>

Parameters:

key - The object to check if it exists as a collection element

i - Unused

Returns:

true if the given entry is a collection element

isWrapper

public boolean isWrapper(Object collection)

Description copied from interface: PersistentCollection

Is this the wrapper for the given collection instance?

Specified by:

isWrapper in interface PersistentCollection<E>

Parameters:

collection - The collection to check whether this is wrapping it

Returns:

true if this is a wrapper around that given collection instance.