Package org.hibernate.collection.spi

Class PersistentMap<K,E>

java.lang.Object

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

org.hibernate.collection.spi.PersistentMap<K,E>

All Implemented Interfaces:

Serializable, Map<K,E>, LazyInitializable, PersistentCollection<E>

Direct Known Subclasses:

PersistentSortedMap

@Incubating
public class PersistentMap<K,E>
extends AbstractPersistentCollection<E>
implements Map<K,E>

A persistent wrapper for a Map. Underlying collection is a HashMap.

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>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<K,E>	map

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

elementRemoved, UNKNOWN

Constructor Summary

Constructors

Constructor	Description
PersistentMap()	Empty constructor.
PersistentMap(SharedSessionContractImplementor session)	Instantiates a lazy map (the underlying map is un-initialized).
PersistentMap(SharedSessionContractImplementor session, Map<K,E> map)	Instantiates a non-lazy map (the underlying map is constructed from the incoming map reference).

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Object	disassemble(CollectionPersister persister)	Disassemble the collection to get it ready for the cache
boolean	empty()	Is the collection empty?
Iterator<Map.Entry<K,E>>	entries(CollectionPersister persister)	Iterate all collection entries, during update of the database
boolean	entryExists(Object entry, int i)	Does the given element/entry exist in the collection?
Set<Map.Entry<K,E>>	entrySet()
boolean	equals(Object other)
boolean	equalsSnapshot(CollectionPersister persister)	Does the current state exactly match the snapshot?
E	get(Object key)
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<?> loadingState)	Inject the state loaded for a collection instance.
boolean	isEmpty()
boolean	isSnapshotEmpty(Serializable snapshot)	Is the snapshot empty?
boolean	isWrapper(Object collection)	Is this the wrapper for the given collection instance?
Set<K>	keySet()
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?
E	put(K key, E value)
void	putAll(Map<? extends K,? extends E> puts)
E	remove(Object key)
int	size()
String	toString()
Collection<E>	values()

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, isRowUpdatePossible, 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.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

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

includeInInsert, includeInRecreate, isDirectlyProvidedCollection, isNewlyInstantiated, needsUpdating, render

Field Details

map

protected Map<K,E> map

Constructor Details

PersistentMap

public PersistentMap()

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.

PersistentMap

public PersistentMap(SharedSessionContractImplementor session)

Instantiates a lazy map (the underlying map is un-initialized).

Parameters:

session - The session to which this map will belong.

PersistentMap

public PersistentMap(SharedSessionContractImplementor session,
 Map<K,E> map)

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

Parameters:

session - The session to which this map will belong.

map - The underlying map 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<K>

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<K>

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<K>

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<K>

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<K>

Parameters:

snapshot - The snapshot to check

Returns:

true if the given snapshot is empty

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<K>

Parameters:

collection - The collection to check whether this is wrapping it

Returns:

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

size

public int size()

Specified by:

size in interface Map<K,E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,E>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,E>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,E>

get

public E get(Object key)

Specified by:

get in interface Map<K,E>

put

public E put(K key,
 E value)

Specified by:

put in interface Map<K,E>

remove

public E remove(Object key)

Specified by:

remove in interface Map<K,E>

putAll

public void putAll(Map<? extends K,? extends E> puts)

Specified by:

putAll in interface Map<K,E>

clear

public void clear()

Specified by:

clear in interface Map<K,E>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,E>

values

public Collection<E> values()

Specified by:

values in interface Map<K,E>

entrySet

public Set<Map.Entry<K,E>> entrySet()

Specified by:

entrySet in interface Map<K,E>

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<K>

Specified by:

empty in class AbstractPersistentCollection<E>

Returns:

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

toString

public String toString()

Overrides:

toString in class Object

entries

public Iterator<Map.Entry<K,E>> entries(CollectionPersister persister)

Description copied from interface: PersistentCollection

Iterate all collection entries, during update of the database

Specified by:

entries in interface PersistentCollection<K>

Parameters:

persister - The collection persister.

Returns:

The iterator

injectLoadedState

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

Description copied from interface: PersistentCollection

Inject the state loaded for a collection instance.

Specified by:

injectLoadedState in interface PersistentCollection<K>

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<K>

Parameters:

persister - The collection persister

disassembled - The disassembled cached state

owner - The collection owner

Throws:

HibernateException

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<K>

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<K>

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<K>

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)
                      throws HibernateException

Description copied from interface: PersistentCollection

Do we need to update this element?

Specified by:

needsUpdating in interface PersistentCollection<K>

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

Throws:

HibernateException

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<K>

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<K>

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<K>

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 Map<K,E>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,E>

Overrides:

hashCode in class Object

entryExists

public boolean entryExists(Object entry,
 int i)

Description copied from interface: PersistentCollection

Does the given element/entry exist in the collection?

Specified by:

entryExists in interface PersistentCollection<K>

Parameters:

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

i - Unused

Returns:

true if the given entry is a collection element