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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.4.2_02) on Thu Nov 13 17:20:33 PST 2003 --><TITLE>EntityBean (Java 2 Platform Ent. Ed. v1.4)</TITLE><META NAME="keywords" CONTENT="javax.ejb.EntityBean interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="EntityBean (Java 2 Platform Ent. 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Ed. v1.4</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../javax/ejb/EnterpriseBean.html" title="interface in javax.ejb"><B>PREV CLASS</B></A> <A HREF="../../javax/ejb/EntityContext.html" title="interface in javax.ejb"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="EntityBean.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.ejb</FONT><BR>Interface EntityBean</H2><DL><DT><B>All Superinterfaces:</B> <DD><A HREF="../../javax/ejb/EnterpriseBean.html" title="interface in javax.ejb">EnterpriseBean</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A></DD></DL><HR><DL><DT>public interface <B>EntityBean</B><DT>extends <A HREF="../../javax/ejb/EnterpriseBean.html" title="interface in javax.ejb">EnterpriseBean</A></DL><P>The EntityBean interface is implemented by every entity enterprise Bean class. The container uses the EntityBean methods to notify the enterprise Bean instances of the instance's life cycle events.<P><P><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#ejbActivate()">ejbActivate</A></B>()</CODE><BR> A container invokes this method when the instance is taken out of the pool of available instances to become associated with a specific EJB object. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#ejbLoad()">ejbLoad</A></B>()</CODE><BR> A container invokes this method to instruct the instance to synchronize its state by loading it state from the underlying database. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#ejbPassivate()">ejbPassivate</A></B>()</CODE><BR> A container invokes this method on an instance before the instance becomes disassociated with a specific EJB object. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#ejbRemove()">ejbRemove</A></B>()</CODE><BR> A container invokes this method before it removes the EJB object that is currently associated with the instance. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#ejbStore()">ejbStore</A></B>()</CODE><BR> A container invokes this method to instruct the instance to synchronize its state by storing it to the underlying database. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#setEntityContext(javax.ejb.EntityContext)">setEntityContext</A></B>(<A HREF="../../javax/ejb/EntityContext.html" title="interface in javax.ejb">EntityContext</A> ctx)</CODE><BR> Set the associated entity context. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/ejb/EntityBean.html#unsetEntityContext()">unsetEntityContext</A></B>()</CODE><BR> Unset the associated entity context. </TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="setEntityContext(javax.ejb.EntityContext)"><!-- --></A><H3>setEntityContext</H3><PRE>public void <B>setEntityContext</B>(<A HREF="../../javax/ejb/EntityContext.html" title="interface in javax.ejb">EntityContext</A> ctx) throws <A HREF="../../javax/ejb/EJBException.html" title="class in javax.ejb">EJBException</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/rmi/RemoteException.html" title="class or interface in java.rmi">RemoteException</A></PRE><DL><DD>Set the associated entity context. The container invokes this method on an instance after the instance has been created. <p> This method is called in an unspecified transaction context.<P><DD><DL></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>ctx</CODE> - An EntityContext interface for the instance. The instance should store the reference to the context in an instance variable.<DT><B>Throws:</B><DD><CODE><A HREF="../../javax/ejb/EJBException.html" title="class in javax.ejb">EJBException</A></CODE> - Thrown by the method to indicate a failure caused by a system-level error.<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/rmi/RemoteException.html" title="class or interface in java.rmi">RemoteException</A></CODE> - This exception is defined in the method signature to provide backward compatibility for enterprise beans written for the EJB 1.0 specification. Enterprise beans written for the EJB 1.1 specification should throw the javax.ejb.EJBException instead of this exception. Enterprise beans written for the EJB2.0 and higher specifications must throw the javax.ejb.EJBException instead of this exception.</DL></DD></DL><HR><A NAME="unsetEntityContext()"><!-- --></A><H3>unsetEntityContext</H3><PRE>public void <B>unsetEntityContext</B>() throws <A HREF="../../javax/ejb/EJBException.html" title="class in javax.ejb">EJBException</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/rmi/RemoteException.html" title="class or interface in java.rmi">RemoteException</A></PRE><DL><DD>Unset the associated entity context. The container calls this method before removing the instance. <p> This is the last method that the container invokes on the instance. The Java garbage collector will eventually invoke the finalize() method on the instance.⌨️ 快捷键说明
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