Eve,
Now I'm confused...
out.println("<td>");out.println(itemlist.getDeptID());out.println("</td>")
will print the department (if Department class has toString() method - otherwise
it'll print it's hashcode).
So what else is not working?
thanks,
-marina
Eve Pokua wrote:
>
> Hello everyone,
>
> I believe I have identitied where this problem lies especailly between my
> and
>
>
>
> In my client, I am using my helper class (Iteamdetailhlp) to print
> details from the database.
>
> try{
> InitialContext ctx=new InitialContext();
> Iteamdetails
> iteamdetails=(Iteamdetails)ctx.lookup("IteamdetailsBeanJNDI");
>
> iteamdetailhlp=iteamdetails.BargainCornItems(barconr);
>
>
> out.println("<TABLE BORDER='1' CELLPADDING='3'
> CELLSPACING='1'>");
> out.println("<TR>");
> out.println("<td>"
> +"Itemcode");out.println("<td>" +"Name"); out.println("<td>"
> +"Description"); out.println("<td>" +"Size"); out.println("<td>"
> +"Colour");out.println("<td>" +"Price");out.println("</td>");
> out.println("</TR>");
>
>
> for(Iteamdetailhlp itemlist: iteamdetailhlp){
>
> out.println("<TR>");
> out.println("<form method='get'
> action='AllItemsser'>");
>
>
> out.println("<td>");out.println(itemlist.getItmid());out.println("</td>");
> out.println("<td>");out.println(itemlist.getItmname());out.println("</td>");
>
> out.println("<td>");out.println(itemlist.getDescription());out.println("</td>");
>
> out.println("<td>");out.println(itemlist.getItemsize());out.println("</td>");
>
> out.println("<td>");out.println(itemlist.getColour());out.println("</td>");
>
> out.println("<td>");out.println(itemlist.getPrice());out.println("</td>");
>
> out.println("<td>");out.println(itemlist.getDeptID());out.println("</td>");
> out.println("</td>");
>
>
> But I was having issues linking the helper class to the
> my Departmentent,
>
> So this would not work:
>
> public String toString() {
> String s = itmid + " " + itmname +" " + description + " "+
> itemsize + " " + colour + " " + price + " " + departmentent;
> return s;
> }
>
> This is why the departmentent above in the toString() does not work
> because, there is
> no relationship between this class the related class. However, my
> entity class (Iteamdetailsent)
> is mapped and related to the Departmentent entity.
>
> How do I go about this? Any ideas?
>
> Thanks
>
> eve
>
>
> ------------------------------------------------------------------------
> From: gorgeous65_at_msn.com
> To: persistence_at_glassfish.dev.java.net
> CC: ejb_at_glassfish.dev.java.net
> Date: Thu, 16 Aug 2007 15:52:11 +0100
> Subject: RE: printing composite/foreign keys in the client
>
> Hello everyone,
>
> I have made changes to methods of my classes. I understand this
> mistake was causing some
> confusion. Please, see attached.
>
> Thanks
>
> eve
>
>
> ------------------------------------------------------------------------
> From: gorgeous65_at_msn.com
> To: persistence_at_glassfish.dev.java.net
> CC: ejb_at_glassfish.dev.java.net
> Date: Thu, 16 Aug 2007 12:38:59 +0100
> Subject: RE: printing composite/foreign keys in the client
>
> hi,
>
> > Iteamdetailsent.toString()
>
> I believe this is what you are talking about:
>
> public String toString() {
> String s = itmid + ' ' + itmname +' ' + description +
> ' '+ itemsize + ' ' + colour + ' ' + price + ' ' +
> departmentent;
>
> return s;
> }
>
> it is mapped at the being of the class:
>
> @ManyToOne()
> @JoinColumn(name='DeptID')
> private Departmentent departmentent;
>
> although, I am not sure if I should map these as well:
>
> public Departmentent getDeptID(){
> return departmentent;}
>
> public void setDeptID(Departmentent departmentent){
> this.departmentent=departmentent;}
>
> This is all in the Iteamdetailsent class
>
>
> I will make more changes and see if it works.
>
> Thanks
>
> eve
>
>
>
>
> > Date: Wed, 15 Aug 2007 19:38:58 -0700
> > From: Marina.Vatkina_at_Sun.COM
> > To: persistence_at_glassfish.dev.java.net
> > CC: ejb_at_glassfish.dev.java.net
> > Subject: Re: printing composite/foreign keys in the client
> >
> > Eve,
> >
> > Eve Pokua wrote:
> > > Thanks Marina,
> > >
> > > I will try and clean them up as much as possible. I have
> commented most
> > > out for testing. Just a few questions:
> > >
> > > b) You current example prints the departmentent object ref.
> Does it
> > > print null?
> > >
> > > Are you refering this to the client AllItem??
> >
> > Iteamdetailsent.toString()
> >
> > >
> > > > d) Your properties are not capitalized in CollOrdline -
> that's not a
> > > JavaBean style.
> > >
> > > Sorry! Do you mean I have to state the mothods or variable?
> capital?
> > > Please, explain yourself. I am still learning or I might
> have ignore
> > > certain java styles.
> > > Bear with me please.
> >
> > JavaBean style properties mean having getFoo/setFoo methods
> to represent
> > property named 'foo'.
> >
> > >
> > > e) 'iteamdetailsent' is not initialized - are you sure you
> set it up?
> > >
> > > which of the client are you refering to?? AllItem?/
> >
> > Departmentent. It's not only that the client will be creating
> new instances, but
> > the JPA provider as well.
> >
> > HTH,
> > -marina
> >
> >
> > > Thanks
> > >
> > > eve
> > >
> > >
> > >
> > > > Date: Tue, 14 Aug 2007 12:52:40 -0700
> > > > From: Marina.Vatkina_at_Sun.COM
> > > > To: persistence_at_glassfish.dev.java.net
> > > > CC: ejb_at_glassfish.dev.java.net
> > > > Subject: Re: printing composite/foreign keys in the client
> > > >
> > > > Eve,
> > > >
> > > > Can you cleanup your example? This is a quick list of
> things that can
> > > or cannot
> > > > affect the results, but will make the example(s) easier
> to read:
> > > >
> > > > a) There are too many commented out lines so it's not
> clear if you
> > > used them for
> > > > testing or not.
> > > > b) You current example prints the departmentent object
> ref. Does it
> > > print null?
> > > > c) Your CollOrdlinementKey has other fields besides ids -
> if they are
> > > not used,
> > > > please remove them.
> > > > d) Your properties are not capitalized in CollOrdline -
> that's not a
> > > JavaBean style.
> > > > e) 'iteamdetailsent' is not initialized - are you sure
> you set it up?
> > > TLE caches
> > > > objects as-is, so if you didn't set that relationship, it
> will be
> > > null until you
> > > > refresh the instance.
> > > >
> > > > thanks,
> > > > -marina
> > > >
> > > > Eve Pokua wrote:
> > > > > Marina,
> > > > >
> > > > > I have attached the Iteamdetailsent and Department in a
> zip file.
> > > > > And I have also attached CollOrdline with the client.
> Please, feel free
> > > > > to edit them. Or maybe I didn't make use of
> 'bidirectional entity
> > > > > persistence relations'. How do I specified this type of
> relation in my
> > > > > entities? Or maybe I
> > > > > did not map my getmethods well. Whatever, the reason, I
> would
> > > > > appreciate any help.
> > > > >
> > > > > There is an IdClass in my composite entity
> CollOrderline. I have
> > > > > attached this as well. There was an issue about this
> some time ago and
> > > > > I do believe I have done it right but maybe I'm wrong.
> Please, feel
> > > > > free to edit this as well.
> > > > >
> > > > > here is an example:
> > > > >
> > > > >
> > > > > StUDENT
> > > > >
> > > > >
> > > > > sid
> > > > >
> > > > >
> > > > > fname
> > > > >
> > > > >
> > > > > surname
> > > > >
> > > > >
> > > > > Course
> > > > >
> > > > >
> > > > > cid
> > > > >
> > > > > discription
> > > > >
> > > > >
> > > > > ENROLMENT
> > > > >
> > > > >
> > > > > sid
> > > > >
> > > > >
> > > > > cid
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Thanks
> > > > >
> > > > > eve
> > > > >
> > > > > > Date: Mon, 13 Aug 2007 10:14:46 -0700
> > > > > > From: Marina.Vatkina_at_Sun.COM
> > > > > > To: persistence_at_glassfish.dev.java.net
> > > > > > CC: ejb_at_glassfish.dev.java.net
> > > > > > Subject: Re: printing composite/foreign keys in the
> client
> > > > > >
> > > > > > Eve,
> > > > > >
> > > > > > I do not see getDeptID() method on Iteamdetailsent.
> Do you map
> > > the FK
> > > > > twice,
> > > > > > once as a relationship and another time as a field?
> > > > > >
> > > > > > Also, CollOrdline does not define an @IdClass - is it
> a typo?
> > > > > >
> > > > > > thanks,
> > > > > > -marina
> > > > > >
> > > > > > Eve Pokua wrote:
> > > > > > > Hello everyone,
> > > > > > >
> > > > > > > I wonder if somebody could provide me with some help.
> > > > > > >
> > > > > > > First of all I have two entities relating to each
> other:
> > > > > > >
> > > > > > > public class Iteamdetailsent implements Serializable{
> > > > > > > ....................
> > > > > > > @ManyToOne()
> > > > > > > @JoinColumn(name='DeptID')
> > > > > > > private Departmentent departmentent;
> > > > > > > }
> > > > > > >
> > > > > > >
> > > > > > > relating to:
> > > > > > >
> > > > > > >
> > > > > > > public class Departmentent implements
> java.io.Serializable{
> > > > > > > ...
> > > > > > > @OneToMany(mappedBy='departmentent')
> > > > > > > private Collection <Iteamdetailsent> iteamdetailsent;
> > > > > > >
> > > > > > > ...
> > > > > > > }
> > > > > > >
> > > > > > > In the client when I print details as follows:
> > > > > > >
> > > > > > > for(Iteamdetailhlp itemlist: iteamdetailhlp){
> > > > > > >
> > > > > > > out.println('<TR>');
> > > > > > >
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getitmid());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getitmname());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getdescription());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getitemsize());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getcolour());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getprice());out.println('</td>');
> > > > > > >
> > > > > > > out.println('<td>');out.println(
> > > > > itemlist.getDeptID());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > > > > ...........}
> > > > > > >
> > > > > > > The Iteamdetailhlp is a helper class
> > > > > > >
> > > > > > > But this last column gives me a null:
> > > > > > >
> > > > > > >
> > > > >
> > >
> out.println('<td>');out.println(itemlist.getprice());out.println('</td>');
> > > > > > >
> > > > > > > out.println('<td>');out.println(
> > > > > itemlist.getDeptID());out.println('</td>');
> > > > > > >
> > > > > > >
> > > > > > > Itemcode Name Description Size Colour Price
> > > > > > > 4547887 iris table 17in red 1.20 null
> > > > > > > 5456865 protey asdf 52in sdf 5.00 null
> > > > > > > 5468679 opara table 16in pink 12.00 null
> > > > > > > 5475686 asdf asdf 12inch white 1.02 null
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Why is this?
> > > > > > >
> > > > > > > In the log file I get this:
> > > > > > >
> > > > > > >
> > > > >
> > >
> [#|2007-08-13T15:50:10.603+0100|INFO|sun-appserver-pe9.0|javax.enterprise.system.stream.out|_ThreadID=15;_ThreadName=httpWorkerThread-8080-1;|All
>
> > >
> > > > >
> > > > > > > Items:|#]
> > > > > > >
> > > > > > >
> > > > > > > Secondly, i have 3 entities relating to each other.
> To resolve
> > > many to
> > > > > > > many relationship and from my understanding of DB,
> I created and
> > > > > entity
> > > > > > > for composition, containing all the primary keys of
> all three
> > > entities
> > > > > > > as follows:
> > > > > > >
> > > > > > > public class Iteamdetailsent implements Serializable{
> > > > > > >
> > > > > > > @Id
> > > > > > > @Column(name='ITMID', nullable=false)
> > > > > > > private String itmid;
> > > > > > >
> > > > > > > ................
> > > > > > >
> > > > > > > }
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > public class Customerent implements Serializable {
> > > > > > >
> > > > > > > @Id
> > > > > > > @Column(name='CUSID', nullable=false)
> > > > > > > private String cusid;
> > > > > > >
> > > > > > > ..................
> > > > > > > }
> > > > > > >
> > > > > > > public class CollOrdersrement implements
> java.io.Serializable{
> > > > > > >
> > > > > > >
> > > > > > > @Id
> > > > > > > @Column(name='CollORDID', nullable=false)
> > > > > > > private String collOrdID;
> > > > > > >
> > > > > > > ............
> > > > > > > }
> > > > > > >
> > > > > > > with the composite keys defined in the following class:
> > > > > > >
> > > > > > > public class CollOrdline implements
> java.io.Serializable{
> > > > > > >
> > > > > > > private String itmid;
> > > > > > > private String cusid;
> > > > > > > private String collOrdID;
> > > > > > >
> > > > > > > public CollOrdline(){}
> > > > > > >
> > > > > > >
> > > > > > > @Id
> > > > > > > public String getitmid(){
> > > > > > > return itmid;}
> > > > > > >
> > > > > > > public void setitmid(String itmid){
> > > > > > > this.itmid=itmid;}
> > > > > > >
> > > > > > > @Id
> > > > > > > //_at_Column(name = 'CollORDID', nullable = false,
> insertable = false,
> > > > > > > updatable = false)
> > > > > > > public String getcollOrdID(){
> > > > > > > return collOrdID;}
> > > > > > >
> > > > > > > public void setcollOrdID(String collOrdID){
> > > > > > > this.collOrdID=collOrdID;}
> > > > > > >
> > > > > > >
> > > > > > > @Id
> > > > > > > public String getcusid()
> > > > > > > {return cusid;}
> > > > > > >
> > > > > > > public void setcusid(String cusid){
> > > > > > > this.cusid=cusid;
> > > > > > > }
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Now when I try to retrieve data from CollOrdline as
> below:
> > > > > > >
> > > > > > > try{
> > > > > > > InitialContext ctx=new InitialContext();
> > > > > > > //call the interface
> > > > > > >
> > > > > > >
> collOrdlinerem=(CollOrdlinerem)ctx.lookup('CollOrdersrementJNDI');
> > > > > > > String sbc='1';
> > > > > > > String rest;
> > > > > > > collOrdline=collOrdlinerem.Collpoinordid(sbc);
> > > > > > > rest=collOrdline.getcollOrdID();
> > > > > > >
> > > > > > > System.out.print(rest);
> > > > > > >
> > > > > > >
> > > > > > > }catch(Exception ex){
> > > > > > > System.err.println('Can not
> > > > > > > show the collection point order');
> > > > > > > }
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > I get a null with the following message in my log file:
> > > > > > >
> > > > > > >
> > > > >
> > >
> [#|2007-08-13T16:18:36.993+0100|INFO|sun-appserver-pe9.0|javax.enterprise.system.stream.out|_ThreadID=15;_ThreadName=httpWorkerThread-8080-1;|
> > > > > > > null|#]
> > > > > > >
> > > > > > > I believe, this has something to do with the way I
> have
> > > specified the
> > > > > > > relationships. How do I resolve this issue?
> > > > > > >
> > > > > > > Any suggestion will be greatly appreciated.
> > > > > > >
> > > > > > > Thanks
> > > > > > >
> > > > > > > eve
> > > > > > >
> > >
> > >
> ------------------------------------------------------------------------
> > > Are you the Quizmaster? Play BrainBattle with a friend now!
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>
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