CascadeStyle (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.engine
Class CascadeStyle

java.lang.Object
  org.hibernate.engine.CascadeStyle

All Implemented Interfaces:: Serializable

Direct Known Subclasses:: CascadeStyle.MultipleCascadeStyle

public abstract class CascadeStyle
extends Object
implements Serializable

A contract for defining the aspects of cascading various persistence actions.

Author:: Gavin King
See Also:: CascadingAction, Serialized Form

Nested Class Summary

static class CascadeStyle.MultipleCascadeStyle


Field Summary

static CascadeStyle ALL
          save / delete / update / evict / lock / replicate / merge / persist

static CascadeStyle ALL_DELETE_ORPHAN
          save / delete / update / evict / lock / replicate / merge / persist + delete orphans

static CascadeStyle DELETE
          delete

static CascadeStyle DELETE_ORPHAN
          delete + delete orphans

static CascadeStyle EVICT
          evict

static CascadeStyle LOCK
          lock

static CascadeStyle MERGE
          merge

static CascadeStyle NONE
          no cascades

static CascadeStyle PERSIST
          create

static CascadeStyle REFRESH
          refresh

static CascadeStyle REPLICATE
          replicate

static CascadeStyle UPDATE
          save / update

Method Summary

abstract boolean doCascade(CascadingAction action)
          For this style, should the given action be cascaded?

static CascadeStyle getCascadeStyle(String cascade)
          Factory method for obtaining named cascade styles

boolean hasOrphanDelete()
          Do we need to delete orphaned collection elements?

boolean reallyDoCascade(CascadingAction action)
          Probably more aptly named something like doCascadeToCollectionElements(); it is however used from both the collection and to-one logic branches...

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ALL_DELETE_ORPHAN

public static final CascadeStyle ALL_DELETE_ORPHAN

save / delete / update / evict / lock / replicate / merge / persist + delete orphans

ALL

public static final CascadeStyle ALL

save / delete / update / evict / lock / replicate / merge / persist

UPDATE

public static final CascadeStyle UPDATE

save / update

LOCK

public static final CascadeStyle LOCK

lock

REFRESH

public static final CascadeStyle REFRESH

refresh

EVICT

public static final CascadeStyle EVICT

evict

REPLICATE

public static final CascadeStyle REPLICATE

replicate

MERGE

public static final CascadeStyle MERGE

merge

PERSIST

public static final CascadeStyle PERSIST

create

DELETE

public static final CascadeStyle DELETE

delete

DELETE_ORPHAN

public static final CascadeStyle DELETE_ORPHAN

delete + delete orphans

NONE

public static final CascadeStyle NONE

no cascades

Method Detail

doCascade

public abstract boolean doCascade(CascadingAction action)

For this style, should the given action be cascaded?

Parameters:: action - The action to be checked for cascade-ability.
Returns:: True if the action should be cascaded under this style; false otherwise.

reallyDoCascade

public boolean reallyDoCascade(CascadingAction action)

Probably more aptly named something like doCascadeToCollectionElements(); it is however used from both the collection and to-one logic branches...

For this style, should the given action really be cascaded? The default implementation is simply to return doCascade(org.hibernate.engine.CascadingAction); for certain styles (currently only delete-orphan), however, we need to be able to control this seperately.

Parameters:: action - The action to be checked for cascade-ability.
Returns:: True if the action should be really cascaded under this style; false otherwise.

hasOrphanDelete

public boolean hasOrphanDelete()

Do we need to delete orphaned collection elements?

Returns:: True if this style need to account for orphan delete operations; false othwerwise.

getCascadeStyle

public static CascadeStyle getCascadeStyle(String cascade)

Factory method for obtaining named cascade styles

Parameters:: cascade - The named cascade style name.
Returns:: The appropriate CascadeStyle