javax.ejb.EntityContext翻译

<!-- --> Overview Package Class Tree Deprecated Index Help	JavaTM 2 Platform Ent. Ed. v1.4
PREV CLASS NEXT CLASS	FRAMES NO FRAMES &lt;!-- if(window==top) { document.writeln('&lt;A HREF="../../allclasses-noframe.html"&gt;&lt;B&gt;All Classes&lt;/B&gt;&lt;/A&gt;'); } //--&gt; All Classes <noscript></noscript>
SUMMARY:NESTED|FIELD|CONSTR|METHOD	DETAIL:FIELD|CONSTR|METHOD

<!-- ========= END OF TOP NAVBAR ========= -->

---

<!-- ======== START OF CLASS DATA ======== -->

javax.ejb
Interface EntityContext

All Superinterfaces:

EJBContext

---

public interface EntityContext

extends EJBContext

The EntityContext interface provides an instance with access to the container-provided runtime context of an entity enterprise Bean instance. The container passes the EntityContext interface to an entity enterprise Bean instance after the instance has been created. EntityContext接口提供了一个实例来访问容器提供的实体Bean实例的运行时上下文。容器在实例创建后将EntityContext接口传递给实体Bean实例。

The EntityContext interface remains associated with the instance for the lifetime of the instance. Note that the information that the instance obtains using the EntityContext interface (such as the result of the getPrimaryKey() method) may change, as the container assigns the instance to different EJB objects during the instance's life cycle. EntityContext接口在实例的生命周期内保留与实例的关联。注意实例使用EntityContext 接口（比如作为getPrimaryKey()方法的结果）获得的信息可能会有变化，因为容器在实例的 生命周期内会分配给实例以不同的EJB对象。

---

<!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><!-- ========== METHOD SUMMARY =========== --><!-- -->

Method Summary
EJBLocalObject	getEJBLocalObject() Obtain a reference to the EJB local object that is currently associated with the instance. 获得当前与该实例关联的EJB本地对象的引用。
EJBObject	getEJBObject() Obtain a reference to the EJB object that is currently associated with the instance. 获得当前与该实例关联的EJB对象的引用。
Object	getPrimaryKey() Obtain the primary key of the EJB object that is currently associated with this instance. 获得当前与该实例关联的EJB本地对象的主键。

<!-- -->

Methods inherited from interface javax.ejb.EJBContext

getCallerIdentity, getCallerPrincipal, getEJBHome, getEJBLocalHome, getEnvironment, getRollbackOnly, getTimerService, getUserTransaction, isCallerInRole, isCallerInRole, setRollbackOnly

<!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><!-- ============ METHOD DETAIL ========== --><!-- -->

Method Detail

<!-- -->

getEJBLocalObject

public EJBLocalObject getEJBLocalObject()
                                 throws IllegalStateException

Obtain a reference to the EJB local object that is currently associated with the instance. 获得当前与该实例关联的EJB本地对象的引用。

An instance of an entity enterprise Bean can call this method only when the instance is associated with an EJB local object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods. 只有当实体Bean的实例和一个EJB本地对象标识关联，它才可以调用该方法，也就是 ejbActivate、ejbPassivate、ejbPostCreate、ejbRemove、ejbLoad、ejbStore和业务方法。

An instance can use this method, for example, when it wants to pass a reference to itself in a method argument or result. 实例可以使用该方法，比如，以方法参数或结果形式传递自身引用。

Returns:

The EJB local object currently associated with the instance. 当前与实例关联的EJB本地对象。

Throws:

IllegalStateException - if the instance invokes this method while the instance is in a state that does not allow the instance to invoke this method, or if the instance does not have a local interface. 如果实例调用改方法而实例所在的状态不允许其调用该方法或者实例没有本地接口时抛出。

---

<!-- -->

getEJBObject

public EJBObject getEJBObject()
                       throws IllegalStateException

Obtain a reference to the EJB object that is currently associated with the instance. 获得当前与该实例关联的EJB对象的引用。

An instance of an entity enterprise Bean can call this method only when the instance is associated with an EJB object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods. 只有当实体Bean的实例和一个EJB对象标识关联，它才可以调用该方法，也就是 ejbActivate、ejbPassivate、ejbPostCreate、ejbRemove、ejbLoad、ejbStore和业务方法。

An instance can use this method, for example, when it wants to pass a reference to itself in a method argument or result. 实例可以使用该方法，比如，以方法参数或结果形式传递自身引用。

Returns:

The EJB object currently associated with the instance. 当前与实例关联的EJB对象。

Throws:

IllegalStateException - Thrown if the instance invokes this method while the instance is in a state that does not allow the instance to invoke this method, or if the instance does not have a remote interface. 如果实例调用改方法而实例所在的状态不允许其调用该方法或者实例没有远程接口时抛出。

---

<!-- -->

getPrimaryKey

public Object getPrimaryKey()
                     throws IllegalStateException

Obtain the primary key of the EJB object that is currently associated with this instance. 获得当前与该实例关联的EJB本地对象的主键。

An instance of an entity enterprise Bean can call this method only when the instance is associated with an EJB object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods. 只有当实体Bean的实例和一个EJB对象标识关联，它才可以调用该方法，也就是 ejbActivate、ejbPassivate、ejbPostCreate、ejbRemove、ejbLoad、ejbStore和业务方法。

Note: The result of this method is that same as the result of getEJBObject().getPrimaryKey(). 注意：该方法的结果和getEJBObject().getPrimaryKey()的结果相同。

Returns:

The primary key currently associated with the instance. 当前与实例关联的主键。

Throws:

IllegalStateException - Thrown if the instance invokes this method while the instance is in a state that does not allow the instance to invoke this method. 如果实例调用改方法而实例所在的状态不允许其 调用该方法时抛出。

<!-- ========= END OF CLASS DATA ========= -->

---

<!-- ======= START OF BOTTOM NAVBAR ====== --> <!-- -->

<!-- --> Overview Package Class Tree Deprecated Index Help	JavaTM 2 Platform Ent. Ed. v1.4
PREV CLASS NEXT CLASS	FRAMES NO FRAMES &lt;!-- if(window==top) { document.writeln('&lt;A HREF="../../allclasses-noframe.html"&gt;&lt;B&gt;All Classes&lt;/B&gt;&lt;/A&gt;'); } //--&gt; All Classes <noscript></noscript>
SUMMARY:NESTED|FIELD|CONSTR|METHOD	DETAIL:FIELD|CONSTR|METHOD

<!-- ======== END OF BOTTOM NAVBAR ======= -->

---

Submit a bug or feature

Copyright 2003 Sun Microsystems, Inc. All rights reserved.