程序包 org.hibernate.collection.internal

类 PersistentBag

java.lang.Object

org.hibernate.collection.internal.AbstractPersistentCollection

org.hibernate.collection.internal.PersistentBag

所有已实现的接口:

Serializable, Iterable, Collection, List, PersistentCollection

public class PersistentBag
extends AbstractPersistentCollection
implements List

An unordered, unkeyed collection that can contain the same element multiple times. The Java collections API, curiously, has no Bag. Most developers seem to use Lists to represent bag semantics, so Hibernate follows this practice.

作者:

Gavin King

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.hibernate.collection.internal.AbstractPersistentCollection

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

字段概要

字段

修饰符和类型	字段	说明
protected List	bag

从类继承的字段 org.hibernate.collection.internal.AbstractPersistentCollection

elementRemoved, UNKNOWN

构造器概要

构造器

构造器	说明
PersistentBag()	Constructs a PersistentBag.
PersistentBag(SessionImplementor session)	已过时。 PersistentBag(SharedSessionContractImplementor) should be used instead.
PersistentBag(SessionImplementor session, Collection coll)	已过时。 PersistentBag(SharedSessionContractImplementor, Collection) should be used instead.
PersistentBag(SharedSessionContractImplementor session)	Constructs a PersistentBag
PersistentBag(SharedSessionContractImplementor session, Collection coll)	Constructs a PersistentBag

方法概要

修饰符和类型	方法	说明
void	add(int i, Object o)
boolean	add(Object object)
boolean	addAll(int i, Collection c)
boolean	addAll(Collection values)
void	beforeInitialize(CollectionPersister persister, int anticipatedSize)	Called before any elements are read into the collection, allowing appropriate initializations to occur.
void	clear()
boolean	contains(Object object)
boolean	containsAll(Collection c)
Serializable	disassemble(CollectionPersister persister)	Disassemble the collection to get it ready for the cache
boolean	empty()	Is the collection empty?
Iterator	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?
boolean	equals(Object obj)	Bag does not respect the collection API and do an JVM instance comparison to do the equals.
boolean	equalsSnapshot(CollectionPersister persister)	Does the current state exactly match the snapshot?
Object	get(int i)
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	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()
int	indexOf(Object o)
void	initializeFromCache(CollectionPersister persister, Serializable disassembled, Object owner)	Read the state of the collection from a disassembled cached value
boolean	isDirectlyProvidedCollection(Object collection)	Was collection provided directly to this PersistentCollection (i.e., provided as an argument to a constructor)?
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	iterator()
int	lastIndexOf(Object o)
ListIterator	listIterator()
ListIterator	listIterator(int i)
boolean	needsInserting(Object entry, int i, Type elemType)	Do we need to insert this element?
boolean	needsRecreate(CollectionPersister persister)	Do we need to completely recreate this collection when it changes?
boolean	needsUpdating(Object entry, int i, Type elemType)	Do we need to update this element?
int	occurrences(Object o)	Count how many times the given object occurs in the elements
Object	readFrom(ResultSet rs, CollectionPersister persister, CollectionAliases descriptor, Object owner)	Read a row from the JDBC result set
Object	remove(int i)
boolean	remove(Object o)
boolean	removeAll(Collection c)
boolean	retainAll(Collection c)
Object	set(int i, Object o)
int	size()
List	subList(int start, int end)
Object[]	toArray()
Object[]	toArray(Object[] a)
String	toString()

从类继承的方法 org.hibernate.collection.internal.AbstractPersistentCollection

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

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Collection

parallelStream, removeIf, stream, toArray

从接口继承的方法 java.lang.Iterable

forEach

从接口继承的方法 java.util.List

replaceAll, sort, spliterator

字段详细资料

bag

protected List bag

构造器详细资料

PersistentBag

public PersistentBag()

Constructs a PersistentBag. Needed for SOAP libraries, etc

PersistentBag

public PersistentBag(SharedSessionContractImplementor session)

Constructs a PersistentBag

参数:

session - The session

PersistentBag

@Deprecated
public PersistentBag(SessionImplementor session)

已过时。

PersistentBag(SharedSessionContractImplementor) should be used instead.

Constructs a PersistentBag

参数:

session - The session

PersistentBag

public PersistentBag(SharedSessionContractImplementor session,
                     Collection coll)

Constructs a PersistentBag

参数:

session - The session

coll - The base elements.

PersistentBag

@Deprecated
public PersistentBag(SessionImplementor session,
                     Collection coll)

已过时。

PersistentBag(SharedSessionContractImplementor, Collection) should be used instead.

Constructs a PersistentBag

参数:

session - The session

coll - The base elements.

方法详细资料

isWrapper

public boolean isWrapper(Object collection)

从接口复制的说明: PersistentCollection

Is this the wrapper for the given collection instance?

指定者:

isWrapper 在接口中 PersistentCollection

参数:

collection - The collection to check whether this is wrapping it

返回:

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

isDirectlyProvidedCollection

public boolean isDirectlyProvidedCollection(Object collection)

从接口复制的说明: PersistentCollection

Was collection provided directly to this PersistentCollection (i.e., provided as an argument to a constructor)?

Implementors that can copy elements out of a directly provided collection into the wrapped collection should override this method.

指定者:

isDirectlyProvidedCollection 在接口中 PersistentCollection

参数:

collection - The collection

返回:

true, if collection was provided directly to this PersistentCollection; false, otherwise.

empty

public boolean empty()

从接口复制的说明: PersistentCollection

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

指定者:

empty 在接口中 PersistentCollection

指定者:

empty 在类中 AbstractPersistentCollection

返回:

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

entries

public Iterator entries(CollectionPersister persister)

从接口复制的说明: PersistentCollection

Iterate all collection entries, during update of the database

指定者:

entries 在接口中 PersistentCollection

参数:

persister - The collection persister.

返回:

The iterator

readFrom

public Object readFrom(ResultSet rs,
                       CollectionPersister persister,
                       CollectionAliases descriptor,
                       Object owner)
                throws HibernateException,
                       SQLException

从接口复制的说明: PersistentCollection

Read a row from the JDBC result set

指定者:

readFrom 在接口中 PersistentCollection

参数:

rs - The JDBC ResultSet

persister - The collection role

descriptor - The aliases used for the columns making up the collection

owner - The collection owner

返回:

The read object

抛出:

HibernateException - Generally indicates a problem resolving data read from the ResultSet

SQLException - Indicates a problem accessing the ResultSet

beforeInitialize

public void beforeInitialize(CollectionPersister persister,
                             int anticipatedSize)

从接口复制的说明: PersistentCollection

Called before any elements are read into the collection, allowing appropriate initializations to occur.

指定者:

beforeInitialize 在接口中 PersistentCollection

参数:

persister - The underlying collection persister.

anticipatedSize - The anticipated size of the collection after initialization is complete.

equalsSnapshot

public boolean equalsSnapshot(CollectionPersister persister)
                       throws HibernateException

从接口复制的说明: PersistentCollection

Does the current state exactly match the snapshot?

指定者:

equalsSnapshot 在接口中 PersistentCollection

参数:

persister - The collection persister

返回:

true if the current state and the snapshot state match.

抛出:

HibernateException

isSnapshotEmpty

public boolean isSnapshotEmpty(Serializable snapshot)

从接口复制的说明: PersistentCollection

Is the snapshot empty?

指定者:

isSnapshotEmpty 在接口中 PersistentCollection

参数:

snapshot - The snapshot to check

返回:

true if the given snapshot is empty

getSnapshot

public Serializable getSnapshot(CollectionPersister persister)
                         throws HibernateException

从接口复制的说明: PersistentCollection

Return a new snapshot of the current state of the collection

指定者:

getSnapshot 在接口中 PersistentCollection

参数:

persister - The collection persister

返回:

The snapshot

抛出:

HibernateException

getOrphans

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

从接口复制的说明: PersistentCollection

get all "orphaned" elements

指定者:

getOrphans 在接口中 PersistentCollection

指定者:

getOrphans 在类中 AbstractPersistentCollection

参数:

snapshot - The snapshot state

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

返回:

The orphans

抛出:

HibernateException

disassemble

public Serializable disassemble(CollectionPersister persister)
                         throws HibernateException

从接口复制的说明: PersistentCollection

Disassemble the collection to get it ready for the cache

指定者:

disassemble 在接口中 PersistentCollection

参数:

persister - The collection persister

返回:

The disassembled state

抛出:

HibernateException

initializeFromCache

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

从接口复制的说明: PersistentCollection

Read the state of the collection from a disassembled cached value

指定者:

initializeFromCache 在接口中 PersistentCollection

参数:

persister - The collection persister

disassembled - The disassembled cached state

owner - The collection owner

抛出:

HibernateException

needsRecreate

public boolean needsRecreate(CollectionPersister persister)

从接口复制的说明: PersistentCollection

Do we need to completely recreate this collection when it changes?

指定者:

needsRecreate 在接口中 PersistentCollection

覆盖:

needsRecreate 在类中 AbstractPersistentCollection

参数:

persister - The collection persister

返回:

true if a change requires a recreate.

getDeletes

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

从接口复制的说明: PersistentCollection

Get all the elements that need deleting

指定者:

getDeletes 在接口中 PersistentCollection

参数:

persister - The collection persister

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

返回:

An iterator over the elements to delete

抛出:

HibernateException

needsInserting

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

从接口复制的说明: PersistentCollection

Do we need to insert this element?

指定者:

needsInserting 在接口中 PersistentCollection

参数:

entry - The collection element to check

i - The index (for indexed collections)

elemType - The type for the element

返回:

true if the element needs inserting

抛出:

HibernateException

isRowUpdatePossible

public boolean isRowUpdatePossible()

从接口复制的说明: 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.

指定者:

isRowUpdatePossible 在接口中 PersistentCollection

覆盖:

isRowUpdatePossible 在类中 AbstractPersistentCollection

返回:

true if the row for each element is known

needsUpdating

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

从接口复制的说明: PersistentCollection

Do we need to update this element?

指定者:

needsUpdating 在接口中 PersistentCollection

参数:

entry - The collection element to check

i - The index (for indexed collections)

elemType - The type for the element

返回:

true if the element needs updating

size

public int size()

指定者:

size 在接口中 Collection

指定者:

size 在接口中 List

isEmpty

public boolean isEmpty()

指定者:

isEmpty 在接口中 Collection

指定者:

isEmpty 在接口中 List

contains

public boolean contains(Object object)

指定者:

contains 在接口中 Collection

指定者:

contains 在接口中 List

iterator

public Iterator iterator()

指定者:

iterator 在接口中 Collection

指定者:

iterator 在接口中 Iterable

指定者:

iterator 在接口中 List

toArray

public Object[] toArray()

指定者:

toArray 在接口中 Collection

指定者:

toArray 在接口中 List

toArray

public Object[] toArray(Object[] a)

指定者:

toArray 在接口中 Collection

指定者:

toArray 在接口中 List

add

public boolean add(Object object)

指定者:

add 在接口中 Collection

指定者:

add 在接口中 List

remove

public boolean remove(Object o)

指定者:

remove 在接口中 Collection

指定者:

remove 在接口中 List

containsAll

public boolean containsAll(Collection c)

指定者:

containsAll 在接口中 Collection

指定者:

containsAll 在接口中 List

addAll

public boolean addAll(Collection values)

指定者:

addAll 在接口中 Collection

指定者:

addAll 在接口中 List

removeAll

public boolean removeAll(Collection c)

指定者:

removeAll 在接口中 Collection

指定者:

removeAll 在接口中 List

retainAll

public boolean retainAll(Collection c)

指定者:

retainAll 在接口中 Collection

指定者:

retainAll 在接口中 List

clear

public void clear()

指定者:

clear 在接口中 Collection

指定者:

clear 在接口中 List

getIndex

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

从接口复制的说明: PersistentCollection

Get the index of the given collection entry

指定者:

getIndex 在接口中 PersistentCollection

参数:

entry - The collection entry/element

i - The assumed index

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

返回:

The index value

getElement

public Object getElement(Object entry)

从接口复制的说明: 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.

指定者:

getElement 在接口中 PersistentCollection

参数:

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

返回:

The corresponding object that is part of the collection elements.

getSnapshotElement

public Object getSnapshotElement(Object entry,
                                 int i)

从接口复制的说明: PersistentCollection

Get the snapshot value of the given collection entry

指定者:

getSnapshotElement 在接口中 PersistentCollection

参数:

entry - The entry

i - The index

返回:

The snapshot state for that element

occurrences

public int occurrences(Object o)

Count how many times the given object occurs in the elements

参数:

o - The object to check

返回:

The number of occurrences.

add

public void add(int i,
                Object o)

指定者:

add 在接口中 List

addAll

public boolean addAll(int i,
                      Collection c)

指定者:

addAll 在接口中 List

get

public Object get(int i)

指定者:

get 在接口中 List

indexOf

public int indexOf(Object o)

指定者:

indexOf 在接口中 List

lastIndexOf

public int lastIndexOf(Object o)

指定者:

lastIndexOf 在接口中 List

listIterator

public ListIterator listIterator()

指定者:

listIterator 在接口中 List

listIterator

public ListIterator listIterator(int i)

指定者:

listIterator 在接口中 List

remove

public Object remove(int i)

指定者:

remove 在接口中 List

set

public Object set(int i,
                  Object o)

指定者:

set 在接口中 List

subList

public List subList(int start,
                    int end)

指定者:

subList 在接口中 List

entryExists

public boolean entryExists(Object entry,
                           int i)

从接口复制的说明: PersistentCollection

Does the given element/entry exist in the collection?

指定者:

entryExists 在接口中 PersistentCollection

参数:

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

i - Unused

返回:

true if the given entry is a collection element

toString

public String toString()

覆盖:

toString 在类中 Object

equals

public boolean equals(Object obj)

Bag does not respect the collection API and do an JVM instance comparison to do the equals. The semantic is broken not to have to initialize a collection for a simple equals() operation.

指定者:

equals 在接口中 Collection

指定者:

equals 在接口中 List

覆盖:

equals 在类中 Object

另请参阅:

hashCode

public int hashCode()

指定者:

hashCode 在接口中 Collection

指定者:

hashCode 在接口中 List

覆盖:

hashCode 在类中 Object