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GMF link (Relationship) between two nodes [message #437998]

Fri, 31 July 2009 02:52

Swapnil is currently offline

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Messages: 19
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Can a link between two nodes has its own properties same as a node.

I mean i am trying to create a graphical editor for the following domain
model:

<?xml version="1.0" encoding="UTF-8"?>
<SMC>
<Roles>
<Role />
<Role />
</Roles>
<Contracts>
<Contract>
<Description />
<Role>lc1</Role>
<Role>rta</Role>
<Terms>
<Term />
<Terms>
</Contract>
</Contracts>
</SMC>

Now there is a reference to Role from a Contract element. While
representing it graphically there will be a link between two Roles.

So can this link (Relationship) be of type Contract & can it have its own
attributes & references?

Please give me some hint on this.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #441303 is a reply to message #437998]

Fri, 31 July 2009 10:23

Alexander Shatalin is currently offline

Alexander Shatalin

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Messages: 2928
Registered: July 2009

Senior Member

Hello Swapnil,

> Can a link between two nodes has its own properties same as a node.
>
> I mean i am trying to create a graphical editor for the following
> domain model:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <SMC>
> <Roles>
> <Role />
> <Role />
> </Roles>
> <Contracts>
> <Contract>
> <Description />
> <Role>lc1</Role>
> <Role>rta</Role>
> <Terms>
> <Term />
> <Terms>
> </Contract>
> </Contracts>
> </SMC>
> Now there is a reference to Role from a Contract element. While
> representing it graphically there will be a link between two Roles.
>

> So can this link (Relationship) be of type Contract & can it have its
> own attributes & references?
Yes. Just create EClass "RoleReference" in .ecore. This EClass should keep
a reference to Role instance + desired properties + should be located inside
"Conttract" EClass (Contract should have containment reference to "RoleReference"
EClass).

Then you can model RoleReference as a link. See Ecore diagram example - EReference
link visualized there using this idea.

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #442757 is a reply to message #441303]

Fri, 31 July 2009 13:25

Swapnil is currently offline

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Messages: 19
Registered: July 2009

Junior Member

Thanks Alex.

The example you mentioned is the Mindmap example? I mean is it the one in
the tutorial?

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #443559 is a reply to message #442757]

Fri, 31 July 2009 15:08

Alexander Shatalin is currently offline

Alexander Shatalin

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Messages: 2928
Registered: July 2009

Senior Member

Hello Swapnil,

> The example you mentioned is the Mindmap example? I mean is it the one
> in the tutorial?
No. it is in CVS and in distributed as a part of GMF. In mindmap Relationship
from Topic to topic is modeled in a same way.

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #443663 is a reply to message #443559]

Fri, 31 July 2009 15:29

Swapnil is currently offline

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Messages: 19
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Thanks a lot Alex.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #467832 is a reply to message #441303]

Mon, 03 August 2009 04:24

Swapnil is currently offline

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Messages: 19
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Hi Alex,

While creating Generator diagram code using Dashboard for following model
i get some errors:

<?xml version="1.0" encoding="UTF-8"?>
<SMC>
<Roles>
<Role />
<Role />
</Roles>
<Contracts>
<Contract>
<Description />
<Role>lc1</Role>
<Role>rta</Role>
<Terms>
<Term />
<Terms>
</Contract>
</Contracts>
</SMC>

Errors are:

The method getRole() is undefined for the type SMCType
TestSMCDiagramUpdater.java

The type SMCTypeImpl must implement the inherited abstract method
SMCType.setRole(RoleType) SMCTypeImpl.java

So my question is that: Can GMF support three leves of nested references
or is that a bug?

e.g.

<SMC>
<Roles>
<Role />
<Role />
</Roles>
</SMC>

where SMC, Roles & Role are of complex type elements in an XML schema.

Please provide some hints on this.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #467929 is a reply to message #467832]

Mon, 03 August 2009 11:59

Alexander Shatalin is currently offline

Alexander Shatalin

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Messages: 2928
Registered: July 2009

Senior Member

Hello Swapnil,

> The method getRole() is undefined for the type SMCTypeTestSMCDiagramUpdater.java
>
> The type SMCTypeImpl must implement the inherited abstract method
> SMCType.setRole(RoleType) SMCTypeImpl.java
Is it a compilation problem in SMCTypeImpl.java generated by EMF?

> So my question is that: Can GMF support three leves of nested
> references or is that a bug?
It is possible in GMF to create a node on a diagram and then create subnode
in this node. Do you mean something different by "three leves of nested references"?

> Please provide some hints on this.
I suggest you to edit all the models in corresponding editors instead of
using dashboad.

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #468081 is a reply to message #467929]

Tue, 04 August 2009 01:29

Swapnil is currently offline

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Messages: 19
Registered: July 2009

Junior Member

Hi Alex,

These are the compilation errors with GMF diagram generated code.

The problem is that when i set Containment Meta Feature of Role as
roles:RolesType, it gives these compilation error in the code.

In ecore model, there is a reference to Role from Roles, with
containment=true.

<eClassifiers xsi:type="ecore:EClass" name="RolesType">
<eAnnotations
source="http:///org/eclipse/emf/ecore/util/ExtendedMetaData">
<details key="name" value="Roles_._type"/>
<details key="kind" value="elementOnly"/>
</eAnnotations>
<eStructuralFeatures xsi:type="ecore:EReference" name="role"
lowerBound="1" upperBound="-1"
eType="#//RoleType" containment="true" resolveProxies="false">
<eAnnotations source="http:///org/eclipse/emf/ecore'
/util/ExtendedMetaData">
<details key="kind" value="element"/>
<details key="name" value="Role"/>
<details key="namespace" value="##targetNamespace"/>
</eAnnotations>
</eStructuralFeatures>
</eClassifiers>

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #468135 is a reply to message #468081]

Tue, 04 August 2009 10:34

Alexander Shatalin is currently offline

Alexander Shatalin

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Messages: 2928
Registered: July 2009

Senior Member

Hello Swapnil,

> The problem is that when i set Containment Meta Feature of Role as
> roles:RolesType, it gives these compilation error in the code.
>
> In ecore model, there is a reference to Role from Roles, with
> containment=true.
Ok. Currently you need to:
- have Roles object represented on diagram
- or create derived feature in SMC EClass representing all the "Role"s below
corresponding "Roles" instance (collection returned by this feature should
be able to handle new elements addition and can be used as a containment
feature for Role's NodeMapping)
- or you can modify generated code manually in order to make it working

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #468155 is a reply to message #468135]

Tue, 04 August 2009 12:20

Swapnil is currently offline

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Messages: 19
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Hi Alex,

Thanks for the reply.

I actually do have Roles element on the diagram i think that's why it is
getting displayed under Containment Meta Feature drop-down list under
gmfgen (generator model) file as roles:RolesType

Is that what i need to do? And if i do select roles:RolesType from
drop-down menu i get the compilation errors in generated code.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #468182 is a reply to message #468155]

Tue, 04 August 2009 13:04

Alexander Shatalin is currently offline

Alexander Shatalin

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Registered: July 2009

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Hello Swapnil,

> I actually do have Roles element on the diagram i think that's why it
If you have a NodeMapping for Roles element in .gmfmap model then you have
to create ChildNodeMapping for Role element below this one to avoid compilation
problems.

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #468183 is a reply to message #468182]

Tue, 04 August 2009 13:09

Swapnil is currently offline

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Got that. Thanks a lot Alex.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #468367 is a reply to message #441303]

Wed, 05 August 2009 09:55

Swapnil is currently offline

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Hi Alex,

I checked out Ecore diagram editor example project from CVS.

But this project doesn't contain ecore model (Ecore.ecore) used for this
project. Where can i get it form?

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #468368 is a reply to message #468367]

Wed, 05 August 2009 09:58

Alexander Shatalin is currently offline

Alexander Shatalin

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Hello Swapnil,

It is in one of EMF models: org.eclipse.emf.ecore/model/Ecore.ecore

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #468402 is a reply to message #468368]

Wed, 05 August 2009 12:40

Swapnil is currently offline

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Messages: 19
Registered: July 2009

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Hi Alex,

Is this repository for EMF models?

http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.emf/?ro ot=Modeling_Project

But it's not present here.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #476648 is a reply to message #468402]

Thu, 06 August 2009 00:49

Swapnil is currently offline

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Messages: 19
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Found Ecore.ecore. Please ignore my last post.

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #477598 is a reply to message #441303]

Thu, 06 August 2009 05:36

Swapnil is currently offline

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Messages: 19
Registered: July 2009

Junior Member

Hi Alex,

When i drag & drop a link between two nodes on the canvas the two nodes &
the link between them gets disappeared from the canvas. Although in domain
model file (xml file getting created) they are persisted. I mean they are
present in the xml file (domain model file) but not on the canvas
(.diagram file).

Is this a bug or i am i doing something wrong?

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #478166 is a reply to message #477598]

Thu, 06 August 2009 08:35

Alexander Shatalin is currently offline

Alexander Shatalin

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Messages: 2928
Registered: July 2009

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Hello Swapnil,

> Is this a bug or i am i doing something wrong?
Try to reopen/refresh diagram by pressing F5.
It really depends on the configuration, but corresponding functionality is
working well with Ecore diagram..

-----------------
Alex Shatalin

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Re: GMF link (Relationship) between two nodes [message #478811 is a reply to message #478166]

Fri, 07 August 2009 02:47

Swapnil is currently offline

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Messages: 19
Registered: July 2009

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Hi Alex,

In Ecore diagram example, the association between two classes is of type
EReference.

But EReference type is not getting created in ecore model file (.ecore
file getting generated).

I mean it is creating two EClasses but EReference & its own properties are
not getting created in Ecore model file:

<?xml version="1.0" encoding="UTF-8"?>
<ecore:EPackage xmi:version="2.0"
xmlns:xmi="http://www.omg.org/XMI"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore">
<eClassifiers xsi:type="ecore:EClass" name="Test1">
<eStructuralFeatures xsi:type="ecore:EReference" name="Test1-Test2"
eType="#//Test2" />
</eClassifiers>
<eClassifiers xsi:type="ecore:EClass" name="Test2">
<eStructuralFeatures xsi:type="ecore:EReference" name="test2-test1"
eType="#//Test1" />
</eClassifiers>
</ecore:EPackage>

I want to have a link of type Contract & its own properties created as xml
file.

e.g.

<SMC>
<Role>
<Contract /> 
</Role>

<Contract id= "1">
<Term />
<Description />
</Contract>
</SMC>

Can you please tell me what am i missing?

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #479091 is a reply to message #478811]

Sun, 09 August 2009 03:12

Swapnil is currently offline

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Messages: 19
Registered: July 2009

Junior Member

Hi Alex,

I have fixed the issue with my Ecore model. Please ignore my previous post
question.

I have one question now: At runtime model digram file is getting created.

But it uses XPath (?) to reference the created elements. But this is
incompatible with JAXB. Is there any fix for this?

e.g. <Role1>//@sMC/@role.0</Role1>

<?xml version="1.0" encoding="UTF-8"?>
<SMC>
<Role id="Role_1" name="Role_1">
<Description>Role_1</Description>
</Role>
<Role id="Role_2" name="Role_2">
<Description>Role_2</Description>
</Role>
<Contract id="Contract_1" name="Contract_1">
<Abstract>true</Abstract>
<State>state2</State>
<Role1>//@sMC/@role.0</Role1>
<Role2>//@sMC/@role.1</Role2>
</Contract>
</SMC>

Cheers,

Swapnil

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Re: GMF link (Relationship) between two nodes [message #480533 is a reply to message #479091]

Mon, 17 August 2009 14:39

Alexander Shatalin is currently offline

Alexander Shatalin

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Messages: 2928
Registered: July 2009

Senior Member

Hello Swapnil,

> But it uses XPath (?) to reference the created elements. But this is
> incompatible with JAXB. Is there any fix for this?
It is using EMF to persist references across model objects, so if you need
to travers these references by java code you need to load EMf resource and
use EMF-generated API to traverse it.

-----------------
Alex Shatalin

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