Ooops, Thanks Stanislas.
Don't for get the hashCode and equals methods in the primary key
classes........
-----Original Message-----
From: Stanislas Truffaut
Sent: 20 December 2000 17:11
To: Tim Squires
Subject: RE: compound key
Hi,
be carefull a PK class as said in ejb specification must implement
hashCode() and equals() method....
----------------------------------------------------------------------------
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From: Tim Squires
Subject: RE: compound key
Date: Wed, 20 Dec 2000 04:21:46 -0800
----------------------------------------------------------------------------
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What you need to do is create a primary key class with the primary keys in
it:
--------------------
public class answerPK implements java.io.Serializable
{
public Integer Id;
public Integer Answer_Type_Id;
/**
* Constructor
*/
public answerPK( Integer Id, Integer Answer_Type_Id )
{
this.Id = Id;
this.Answer_Type_Id = Answer_Type_Id;
}
public answerPK() {}
public Integer getId() throws java.rmi.RemoteException
{
return Id;
}
public void setId( Integer Id ) throws java.rmi.RemoteException
{
this.Id = Id;
}
public Integer getAnswer_Type_Id()
throws java.rmi.RemoteException
{
return Answer_Type_Id;
}
public void setAnswer_Type_Id( Integer Answer_Type_Id )
throws java.rmi.RemoteException
{
this.Answer_Type_Id = Answer_Type_Id;
}
}
--------------------------------------------------------
You can then specify in your descriptor:
<prim-key-class>answerPK</prim-key-class>
You still put the variables into your bean class and return the primary key
class ( e.g. answerPK ) from the ejbCreate.
public answerPK ejbCreate( Integer Id, Integer Answer_Type_Id )
throws CreateException, RemoteException
{
this.Id = Id;
this.Answer_Type_Id = Answer_Type_Id;
return new answerPK( Id, Answer_Type_Id );
}
Have fun,
Tim.
-----Original Message-----
From: Henry Hu [mailto:[EMAIL PROTECTED]]
Sent: 16 December 2000 02:21
To: Orion-Interest
Subject: compound key
Could anybody tell me how I can specify a compound key in the descriptor
file? When the primary key consists of 2 or more fields, the DTD told
me not to specify the "<primkey-field></primkey-field> "tag. However,
the deployment has an error as
No direct database fields for primary key
Please help.
Henry
