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RE: [Xdoclet-user] Aggregate DataObjects
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From: Vincent H. <vin...@hu...> - 2002-02-28 21:54:24
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Does your related beans (the tagged ones) are in the sourcepath of
<ejbdoclet/>
I need theem :)
Vincent
> -----Original Message-----
> From: xdo...@li...=20
> [mailto:xdo...@li...] On Behalf=20
> Of Steve Knight
> Sent: jeudi 28 f=E9vrier 2002 22:44
> To: vin...@hu...; xdo...@li...
> Subject: Re: [Xdoclet-user] Aggregate DataObjects
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> Vincent,
> I am having problems using 1-n value objects.
> <entitycmp/> fails whenever it tries to generate the CMP for=20
> a bean with a 1-n value object defined:
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> Running <entitycmp/>
> Generating CMP class for 'com.elequip.ejb.AssetBean'.
> Running XDoclet failed.
> <<Javadoc couldnt load class {0}, add it to the sourcepath=20
> please.>> 1 error 58 warnings
> javadoc: In doclet class xdoclet.DocletTask$DocletMain, =20
> method start has thrown an exception=20
> java.lang.reflect.InvocationTargetException
> E:\MultiViewTest\build.xml:79: Javadoc returned 1
> at org.apache.tools.ant.taskdefs.Javadoc.execute(Javadoc.java:966)
> at xdoclet.DocletTask.execute(DocletTask.java:240)
> at=20
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:104)
> at org.apache.tools.ant.Task.perform(Task.java:217)
> at org.apache.tools.ant.Target.execute(Target.java:184)
> at org.apache.tools.ant.Target.performTasks(Target.java:202)
> at org.apache.tools.ant.Project.executeTarget(Project.java:601)
> at org.apache.tools.ant.Project.executeTargets(Project.java:560)
> at com.intellij.ant.AntMain.a(AntMain.java:114)
> at com.intellij.ant.AntMain.a(AntMain.java:211)
> at com.intellij.ant.AntMain.main(AntMain.java:125)
> E:\MultiViewTest\build.xml:79: Javadoc returned 1
> at org.apache.tools.ant.taskdefs.Javadoc.execute(Javadoc.java:966)
> at xdoclet.DocletTask.execute(DocletTask.java:240)
> at=20
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:104)
> at org.apache.tools.ant.Task.perform(Task.java:217)
> at org.apache.tools.ant.Target.execute(Target.java:184)
> at org.apache.tools.ant.Target.performTasks(Target.java:202)
> at org.apache.tools.ant.Project.executeTarget(Project.java:601)
> at org.apache.tools.ant.Project.executeTargets(Project.java:560)
> at com.intellij.ant.AntMain.a(AntMain.java:114)
> at com.intellij.ant.AntMain.a(AntMain.java:211)
> at com.intellij.ant.AntMain.main(AntMain.java:125)
> E:\MultiViewTest\build.xml:79: Javadoc returned 1
> at org.apache.tools.ant.taskdefs.Javadoc.execute(Javadoc.java:966)
> at xdoclet.DocletTask.execute(DocletTask.java:240)
> at=20
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:104)
> at org.apache.tools.ant.Task.perform(Task.java:217)
> at org.apache.tools.ant.Target.execute(Target.java:184)
> at org.apache.tools.ant.Target.performTasks(Target.java:202)
> at org.apache.tools.ant.Project.executeTarget(Project.java:601)
> at org.apache.tools.ant.Project.executeTargets(Project.java:560)
> at com.intellij.ant.AntMain.a(AntMain.java:114)
> at com.intellij.ant.AntMain.a(AntMain.java:211)
> at com.intellij.ant.AntMain.main(AntMain.java:125)
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> Build completed with 3 errors and 59 warnings. Time: 31 s
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> It seems to stop just after generating the ejbRemove and just=20
> before the section headed by: /* Value Objects BEGIN */ I=20
> don't know what this line "<<Javadoc couldnt load class {0},=20
> add it to the sourcepath please.>>" is referring to?
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> Am I forgetting to include something??? I have been trying=20
> to follow the examples, but I am still unsure as to the=20
> purpose of the "members-name" tag. I have tried 1-1=20
> relationships and it works beautifully.
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> Any ideas?
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> Thanks,
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> Steve
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> ----- Original Message -----
> From: "Vincent Harcq" <vin...@hu...>
> To: "'Steve Knight'" <sck...@ho...>;=20
> <xdo...@li...>
> Sent: Thursday, February 28, 2002 2:13 PM
> Subject: RE: [Xdoclet-user] Aggregate DataObjects
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> The diff are on the entity bean accessor
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> Create:
> comp : creation of composed
> aggr : fbpk + set link
> Remove:
> comp : deletion of composed
> aggr : -
> Set:
> comp : fbpk + set link + set on composed
> aggr : fbpk + set link
> Get:
> comp : fbpk + get Cached
> aggr : fbpk + get at every call
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> This was made for cmp1.1 relation in mind so maybe some of=20
> these have no or less sense with cmp2.
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> Vincent
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>=20
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> > -----Original Message-----
> > From: Steve Knight [mailto:sck...@ho...]
> > Sent: jeudi 28 f=E9vrier 2002 18:45
> > To: vin...@hu...; xdo...@li...
> > Subject: Re: [Xdoclet-user] Aggregate DataObjects
> >
> >
> > Thanks for the explanation, Vincent.
> > I am now using value objects and so far so good.
> > I understand the difference between Aggregation and=20
> Composition, but=20
> > what is the difference in terms of what gets generated by XDoclet?
> >
> > Thanks,
> >
> > Steve
> >
> >
> > ----- Original Message -----
> > From: "Vincent Harcq" <vin...@ya...>
> > To: "'Steve Knight'" <sck...@ho...>;=20
> > <xdo...@li...>
> > Sent: Monday, February 25, 2002 2:14 PM
> > Subject: RE: [Xdoclet-user] Aggregate DataObjects
> >
> >
> > OK
> >
> > You need <valueobject/> subtask
> >
> > AddressBean have @ejb:value-object name=3D"Address" match=3D"*"=20
> > instantiation=3D"eager" That means that a AddressValue will=20
> be created=20
> > containing all fields of the entity bean "eager" means the=20
> VO is build=20
> > on ejbLoad
> >
> > Customer Bean have
> > * @ejb:value-object name=3D"CustomerLight" match=3D"light"
> > * @ejb:value-object name=3D"CustomerNormal" match=3D"normal"=20
> > instantiation=3D"eager"
> > * @ejb:value-object name=3D"Customer" match=3D"*"
> >
> > 3 VO will be build. CustomerValue containing all fields=20
> > CustomerNormalValue contains only fields that have a corresponding=20
> > @ejb:value-object match=3D"normal" For example
> > getCredit() Etc... For LightValue
> >
> > You can avoid a field appearing in the VO (for example I=20
> > XMLized/String Object that are saved in the DB and SAX them=20
> on read. =20
> > Then my String has no meaning in my VO. I want the object. Use =20
> > @ejb:value-object match=3D"*" exclude=3D"true"
> > (Account.getLastModifiedDate) to avoid a field to be picked=20
> up in the=20
> > VO In the opposite use @ejb:value-object name=3D"..."=20
> match=3D"..." on non=20
> > persistent fields to put it in the VO See Accountean.getTotalAmount
> >
> > The attribute relation=3D"external" on a field say this:=20
> because the VO=20
> > is cached in the bean, sometimes you wan to update some=20
> fields because=20
> > you did not have an setSth() that killed your VO. For example=20
> > TotalAmount looks at other Account. The Acount on wich you get the=20
> > VO, you must rerun this computation at get time.
> >
> > Aggregation (1-1)
> > AccountBean ---> CustomerBean
> > @ejb:value-object match=3D"*" aggregate=3D"CustomerNormalValue"=20
> > aggregate-name=3D"OwnerNormalValue"
> >
> > Association (1-1)
> > CustomerBean ---> AddressBean
> > ...
> >
> > For these look at generated code. The idea is=20
> "responsability" of an=20
> > entity bean over its related relationship For Composition Customer=20
> > knows he is the master of Address, .... In all these,=20
> > aggregate/compose is the Java type of the aggregate/compose VO (you=20
> > could read test.interfaces... In fact)=20
> Aggregate-name/compose-name is
> > the name given to the get/set method
> >
> > Aggregation (1-n)
> > CustomerBean ---> AccountBean
> > @ejb:value-object match=3D"*" aggregate=3D"CustomerNormalValue"=20
> > aggregate-name=3D"OwnerNormalValue" ...
> >
> > Association (1-n)
> > CustomerBean ---> AddressBean
> > @ejb:value-object
> > * match=3D"normal"
> > * type=3D"Collection"
> > * relation=3D"external"
> > * compose=3D"test.interfaces.AddressValue"
> > * compose-name=3D"ShippingAddressValue"
> > * members=3D"test.interfaces.Address"
> > * members-name=3D"ShippingAddress"
> >
> > For 1-n I also need the type of what is in the Collection so the=20
> > members and members-name For 1-n relation=3D"external" should=20
> always be=20
> > used.
> >
> > Finally this has not been tested and was written with CMP=20
> 1.1 in mind,=20
> > so more work will be needed for sure. This covers more than Data=20
> > Object but I am listening to any improvements that could be added...
> >
> > Vincent
> >
> >
> > > -----Original Message-----
> > > From: xdo...@li...
> > > [mailto:xdo...@li...] On Behalf
> > Of Steve
> > > Knight
> > > Sent: lundi 25 f=E9vrier 2002 16:30
> > > To: xdo...@li...
> > > Subject: Re: [Xdoclet-user] Aggregate DataObjects
> > >
> > >
> > > Hi Vincent,
> > > Would you mind providing a brief explanation of how to use=20
> > > ValueObjects. I am looking at the XDoclet samples, but I=20
> think an=20
> > > explanation might be helpful as well.
> > >
> > > Thanks,
> > >
> > > Steve
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Vincent Harcq" <vin...@ya...>
> > > To: <bwi...@pd...>; <sck...@ho...>;=20
> > > <xdo...@li...>
> > > Sent: Monday, February 25, 2002 8:12 AM
> > > Subject: RE: [Xdoclet-user] Aggregate DataObjects
> > >
> > >
> > > > Aggregation on _DataObjects_ works only for 1-1
> > > relationship. For 1-n,
> > > > you may want to look at _ValueObject_ (only in cvs and=20
> not fully=20
> > > > tested). It is a kind of _DataObject_ but more=20
> sophiticated. We=20
> > > > introduced there 1-n relationships (as well as multiple VO
> > > per entity
> > > > bean with bean's attributes matching facility,=20
> > > > aggregation/composition,
> > > > ...) Have a look if you want. I'll appreciate feedback :)
> > > >
> > > > Vincent
> > > >
> > > > --- bwi...@pd... wrote:
> > > > > Hi,
> > > > >
> > > > > I'm also interested in knowing more about this. From what I=20
> > > > > understand is you can put an ejb:aggregate task in the
> > > javadocs for
> > > > > a method: eg. for
> > > > > public abstract Collection getAddresses() in a person
> > > entity bean and
> > > > > then I
> > > > > would get a method in my person value object as follows:
> > > public void
> > > > > setAddresses(Collection addresses) and public Collection=20
> > > > > getAddresses().
> > > > >
> > > > > If I include ejb:aggregate as such I get the following error:
> > > > >
> > > > > [ejbdoclet] Running XDoclet failed:
> > > > > [ejbdoclet] <<The bean implementation class for interface=20
> > > > > 'java.util.Collection' not found!>> [ejbdoclet] 1 error=20
> > > > > [ejbdoclet] 100 warnings [ejbdoclet] javadoc: In doclet class
> > > xdoclet.DocletTask$DocletMain,
> > > > > method
> > > > > star
> > > > > t has thrown an exception
> > > java.lang.reflect.InvocationTargetException
> > > > >
> > > > > BUILD FAILED
> > > > >
> > > > > What is wrong here?
> > > > >
> > > > > Thanks :)
> > > > > Bernie
> > > > >
> > > > > -----Urspr=FCngliche Nachricht-----
> > > > > Von: Steve Knight [mailto:sck...@ho...]
> > > > > Gesendet: Samstag, 23. Februar 2002 19:15
> > > > > An: xdo...@li...
> > > > > Betreff: [Xdoclet-user] Aggregate DataObjects
> > > > >
> > > > >
> > > > > Hello,
> > > > > Can someone please explain how to use XDoclet to make=20
> Aggregate=20
> > > > > DataObjects. I realize there is a ejb:aggregate tag,
> > but I'm not
> > > > > sure how to use it properly. And what gets generated?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Steve
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > __________________________________________________
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> > > >
> > >
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> > >
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> >
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> >
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