Home » Modeling » EMF » EMF databinding Recipe
| EMF databinding Recipe [message #420232] |
Mon, 23 June 2008 21:08  |
 Al B
Messages: 130
Registered: July 2009 |
Senior Member |
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|
Hi,
I have a view implementation that displays my EMF model via this mechanism:
treeViewer.setContentProvider(new
AdapterFactoryContentProvider(adapterFactory));
treeViewer.setLabelProvider(new DecoratingLabelProvider(new
AdapterFactoryLabelProvider(adapterFactory),
new ADElementLabelDecorator()));
However, now we would like to make use of the EMF databinding capability
in 2.4 so I have tried to replace the above code with something similar to
the one suggested in the EMF Recipes, as shown below:
ObservableListTreeContentProvider provider = new
ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
treeViewer.setContentProvider(provider);
IObservableSet knownElements = provider.getKnownElements();
IObservableMap[] observeMaps = EMFObservables.observeMaps(knownElements,
new EStructuralFeature[] {
ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
});
ObservableMapLabelProvider labelProvider = new
ObservableMapLabelProvider(observeMaps);
treeViewer.setLabelProvider(labelProvider);
getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
(MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
But, I am getting this IllegalArgumentException: The feature 'mSLADL' is
not a valid feature at the
BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput is
called.
Although I have been using our best friend (the debugger) to trace the
exception, I would like to know first if anyone see any problems in the
way I am setting up the treeviewer content and label providers for
databinding. Unfortunately, the few examples available are using
trableviewers instead of treeviewers.
Thanks in advance!
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| Re: EMF databinding Recipe [message #420235 is a reply to message #420232] |
Tue, 24 June 2008 00:24  |
Ed Merks
Messages: 33141
Registered: July 2009 |
Senior Member |
|
|
AJ,
Comments below.
AJ wrote:
> Hi,
>
> I have a view implementation that displays my EMF model via this
> mechanism:
>
> treeViewer.setContentProvider(new
> AdapterFactoryContentProvider(adapterFactory));
> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
> AdapterFactoryLabelProvider(adapterFactory),
> new ADElementLabelDecorator()));
>
> However, now we would like to make use of the EMF databinding
> capability in 2.4 so I have tried to replace the above code with
> something similar to the one suggested in the EMF Recipes, as shown
> below:
>
> ObservableListTreeContentProvider provider = new
> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
This feature isn't really a list though...
> treeViewer.setContentProvider(provider);
>
> IObservableSet knownElements = provider.getKnownElements();
> IObservableMap[] observeMaps =
> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
> });
> ObservableMapLabelProvider labelProvider = new
> ObservableMapLabelProvider(observeMaps);
> treeViewer.setLabelProvider(labelProvider);
>
> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
> (MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>
>
> But, I am getting this IllegalArgumentException: The feature 'mSLADL'
> is not a valid feature at the
> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput is
> called.
Is it being called for a DocumentRoot instance?
>
> Although I have been using our best friend (the debugger) to trace the
> exception,
You've been reading the newsgroup a lot hey? :-P
> I would like to know first if anyone see any problems in the way I am
> setting up the treeviewer content and label providers for
> databinding. Unfortunately, the few examples available are using
> trableviewers instead of treeviewers.
What type of object is eOpenGet being called on. It will only work for
a document root instance...
>
> Thanks in advance!
>
Ed Merks
Professional Support: https://www.macromodeling.com/
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| Re: EMF databinding Recipe [message #420259 is a reply to message #420235] |
Tue, 24 June 2008 15:39 |
Al B
Messages: 130
Registered: July 2009 |
Senior Member |
|
|
This is a multi-part message in MIME format.
--------------070004040406010505020800
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit
Hello, Ed,
Please see my comments/answers below. Thanks!
Ed Merks wrote:
> AJ,
>
> Comments below.
>
> AJ wrote:
>> Hi,
>>
>> I have a view implementation that displays my EMF model via this
>> mechanism:
>>
>> treeViewer.setContentProvider(new
>> AdapterFactoryContentProvider(adapterFactory));
>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>> AdapterFactoryLabelProvider(adapterFactory),
>> new ADElementLabelDecorator()));
>>
>> However, now we would like to make use of the EMF databinding
>> capability in 2.4 so I have tried to replace the above code with
>> something similar to the one suggested in the EMF Recipes, as shown
>> below:
>>
>> ObservableListTreeContentProvider provider = new
>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
Hum? For some reason, I don't have/see the Literal.
> This feature isn't really a list though...
>> treeViewer.setContentProvider(provider);
>> IObservableSet knownElements = provider.getKnownElements();
>> IObservableMap[] observeMaps =
>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>> });
>> ObservableMapLabelProvider labelProvider = new
>> ObservableMapLabelProvider(observeMaps);
>> treeViewer.setLabelProvider(labelProvider);
>>
>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>> (MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>
>>
>> But, I am getting this IllegalArgumentException: The feature 'mSLADL'
>> is not a valid feature at the
>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput is
>> called.
> Is it being called for a DocumentRoot instance?
No, it was not. So, I have changed to this:
getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
However, it throws a ClassCastException at EObjectObservableList.
java.lang.ClassCastException:
gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
at
org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
at
org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>
>> Although I have been using our best friend (the debugger) to trace the
>> exception,
> You've been reading the newsgroup a lot hey? :-P
>> I would like to know first if anyone see any problems in the way I am
>> setting up the treeviewer content and label providers for
>> databinding. Unfortunately, the few examples available are using
>> trableviewers instead of treeviewers.
> What type of object is eOpenGet being called on. It will only work for
> a document root instance...
With the above change, eGet is now called instead of eOpenGet since the
featureID value is 3.
public Object eGet(EStructuralFeature eFeature, boolean resolve, boolean
coreType)
{
int featureID = eDerivedStructuralFeatureID(eFeature);
if (featureID >= 0)
{
return eGet(featureID, resolve, coreType);
}
else
{
return eOpenGet(eFeature, resolve);
}
}
>>
>> Thanks in advance!
>>
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| Re: EMF databinding Recipe [message #420268 is a reply to message #420259] |
Tue, 24 June 2008 16:59 |
Ed Merks
Messages: 33141
Registered: July 2009 |
Senior Member |
|
|
This is a multi-part message in MIME format.
--------------070605010802020106090007
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AJ,
Comments below.
AJ wrote:
> Hello, Ed,
>
> Please see my comments/answers below. Thanks!
>
>
> Ed Merks wrote:
>> AJ,
>>
>> Comments below.
>>
>> AJ wrote:
>>> Hi,
>>>
>>> I have a view implementation that displays my EMF model via this
>>> mechanism:
>>>
>>> treeViewer.setContentProvider(new
>>> AdapterFactoryContentProvider(adapterFactory));
>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>> AdapterFactoryLabelProvider(adapterFactory),
>>> new ADElementLabelDecorator()));
>>>
>>> However, now we would like to make use of the EMF databinding
>>> capability in 2.4 so I have tried to replace the above code with
>>> something similar to the one suggested in the EMF Recipes, as shown
>>> below:
>>>
>>> ObservableListTreeContentProvider provider = new
>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>
>
> Hum? For some reason, I don't have/see the Literal.
Maybe your model is huge and it's not generated in that case because you
can only have so many constants in an interface. What you have is fine,
it's just that a constant is a better faster.
>
>> This feature isn't really a list though...
>>> treeViewer.setContentProvider(provider);
>>> IObservableSet knownElements = provider.getKnownElements();
>>> IObservableMap[] observeMaps =
>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>> });
>>> ObservableMapLabelProvider labelProvider = new
>>> ObservableMapLabelProvider(observeMaps);
>>> treeViewer.setLabelProvider(labelProvider);
>>>
>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>> (MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>
>>>
>>> But, I am getting this IllegalArgumentException: The feature
>>> 'mSLADL' is not a valid feature at the
>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>> is called.
>> Is it being called for a DocumentRoot instance?
>
> No, it was not. So, I have changed to this:
>
> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>
>
> However, it throws a ClassCastException at EObjectObservableList.
>
> java.lang.ClassCastException:
> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
> at
> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>
> at
> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>
Well, it's a single valued feature, so eGet won't return a list. It
sounds like you'd want observeValuoe.
>
>>>
>>> Although I have been using our best friend (the debugger) to trace
>>> the exception,
>> You've been reading the newsgroup a lot hey? :-P
>>> I would like to know first if anyone see any problems in the way I
>>> am setting up the treeviewer content and label providers for
>>> databinding. Unfortunately, the few examples available are using
>>> trableviewers instead of treeviewers.
>> What type of object is eOpenGet being called on. It will only work
>> for a document root instance...
>
> With the above change, eGet is now called instead of eOpenGet since
> the featureID value is 3.
That sounds like an improvement. You've just written it assuming a list
will come back when it's a single-valued feature (in the context of a
document root).
>
> public Object eGet(EStructuralFeature eFeature, boolean resolve,
> boolean coreType)
> {
> int featureID = eDerivedStructuralFeatureID(eFeature);
> if (featureID >= 0)
> {
> return eGet(featureID, resolve, coreType);
> }
> else
> {
> return eOpenGet(eFeature, resolve);
> }
> }
>
>>>
>>> Thanks in advance!
>>>
>
>
> ------------------------------------------------------------ ------------
>
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http-equiv="Content-Type">
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<body bgcolor="#ffffff" text="#000000">
AJ,<br>
<br>
Comments below.<br>
<br>
AJ wrote:
<blockquote cite="mid:g3r4ia$954$1@build.eclipse.org" type="cite">Hello,
Ed,
<br>
<br>
Please see my comments/answers below. Thanks!
<br>
<br>
<br>
Ed Merks wrote:
<br>
<blockquote type="cite">AJ,
<br>
<br>
Comments below.
<br>
<br>
AJ wrote:
<br>
<blockquote type="cite">Hi,
<br>
<br>
I have a view implementation that displays my EMF model via this
mechanism:
<br>
<br>
treeViewer.setContentProvider(new
AdapterFactoryContentProvider(adapterFactory));
<br>
treeViewer.setLabelProvider(new DecoratingLabelProvider(new
AdapterFactoryLabelProvider(adapterFactory),
<br>
new ADElementLabelDecorator()));
<br>
<br>
However, now we would like to make use of the EMF databinding
capability in 2.4 so I have tried to replace the above code with
something similar to the one suggested in the EMF Recipes, as shown
below:
<br>
<br>
ObservableListTreeContentProvider provider = new
ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
<br>
</blockquote>
Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
<br>
</blockquote>
<br>
<br>
Hum? For some reason, I don't have/see the Literal.
<br>
</blockquote>
Maybe your model is huge and it's not generated in that case because
you can only have so many constants in an interface.
Ed Merks
Professional Support: https://www.macromodeling.com/
|
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| Re: EMF databinding Recipe [message #420283 is a reply to message #420268] |
Tue, 24 June 2008 19:50 |
Al B
Messages: 130
Registered: July 2009 |
Senior Member |
|
|
Ed,
Good point regarding the observeValue and the single-valued feature.
That did help, thanks!
Now, the hookListener is throwing a ClassCastException saying: Cannot
cast org.eclipse.emf.databinding.EObjectObservableValue to
org.eclipse.emf.ecore.EObject
protected void hookListener(Object domainElement)
{
((EObject)domainElement).eAdapters().add(elementListener);
}
So, I am not sure what I am missing at this point.
Thanks again Ed!
Ed Merks wrote:
> AJ,
>
> Comments below.
>
> AJ wrote:
>> Hello, Ed,
>>
>> Please see my comments/answers below. Thanks!
>>
>>
>> Ed Merks wrote:
>>> AJ,
>>>
>>> Comments below.
>>>
>>> AJ wrote:
>>>> Hi,
>>>>
>>>> I have a view implementation that displays my EMF model via this
>>>> mechanism:
>>>>
>>>> treeViewer.setContentProvider(new
>>>> AdapterFactoryContentProvider(adapterFactory));
>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>> new ADElementLabelDecorator()));
>>>>
>>>> However, now we would like to make use of the EMF databinding
>>>> capability in 2.4 so I have tried to replace the above code with
>>>> something similar to the one suggested in the EMF Recipes, as shown
>>>> below:
>>>>
>>>> ObservableListTreeContentProvider provider = new
>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>
>>
>> Hum? For some reason, I don't have/see the Literal.
> Maybe your model is huge and it's not generated in that case because you
> can only have so many constants in an interface. What you have is fine,
> it's just that a constant is a better faster.
>>
>>> This feature isn't really a list though...
>>>> treeViewer.setContentProvider(provider);
>>>> IObservableSet knownElements = provider.getKnownElements();
>>>> IObservableMap[] observeMaps =
>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>> });
>>>> ObservableMapLabelProvider labelProvider = new
>>>> ObservableMapLabelProvider(observeMaps);
>>>> treeViewer.setLabelProvider(labelProvider);
>>>>
>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>> (MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>
>>>>
>>>> But, I am getting this IllegalArgumentException: The feature
>>>> 'mSLADL' is not a valid feature at the
>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>>> is called.
>>> Is it being called for a DocumentRoot instance?
>>
>> No, it was not. So, I have changed to this:
>>
>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>
>>
>> However, it throws a ClassCastException at EObjectObservableList.
>>
>> java.lang.ClassCastException:
>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>> at
>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>
>> at
>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>
> Well, it's a single valued feature, so eGet won't return a list. It
> sounds like you'd want observeValuoe.
>>
>>>>
>>>> Although I have been using our best friend (the debugger) to trace
>>>> the exception,
>>> You've been reading the newsgroup a lot hey? :-P
>>>> I would like to know first if anyone see any problems in the way I
>>>> am setting up the treeviewer content and label providers for
>>>> databinding. Unfortunately, the few examples available are using
>>>> trableviewers instead of treeviewers.
>>> What type of object is eOpenGet being called on. It will only work
>>> for a document root instance...
>>
>> With the above change, eGet is now called instead of eOpenGet since
>> the featureID value is 3.
> That sounds like an improvement. You've just written it assuming a list
> will come back when it's a single-valued feature (in the context of a
> document root).
>>
>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>> boolean coreType)
>> {
>> int featureID = eDerivedStructuralFeatureID(eFeature);
>> if (featureID >= 0)
>> {
>> return eGet(featureID, resolve, coreType);
>> }
>> else
>> {
>> return eOpenGet(eFeature, resolve);
>> }
>> }
>>
>>>>
>>>> Thanks in advance!
>>>>
>>
>>
>> ------------------------------------------------------------ ------------
>>
>
|
|
|
| Re: EMF databinding Recipe [message #420284 is a reply to message #420283] |
Tue, 24 June 2008 20:05 |
Ed Merks
Messages: 33141
Registered: July 2009 |
Senior Member |
|
|
AJ,
I'm not sure how you're getting there. Obviously it's expecting an
EObject, but it's getting the wrapper instead...
AJ wrote:
> Ed,
>
> Good point regarding the observeValue and the single-valued feature.
> That did help, thanks!
>
> Now, the hookListener is throwing a ClassCastException saying: Cannot
> cast org.eclipse.emf.databinding.EObjectObservableValue to
> org.eclipse.emf.ecore.EObject
>
> protected void hookListener(Object domainElement)
> {
> ((EObject)domainElement).eAdapters().add(elementListener);
> }
>
>
> So, I am not sure what I am missing at this point.
>
>
> Thanks again Ed!
>
>
>
> Ed Merks wrote:
>> AJ,
>>
>> Comments below.
>>
>> AJ wrote:
>>> Hello, Ed,
>>>
>>> Please see my comments/answers below. Thanks!
>>>
>>>
>>> Ed Merks wrote:
>>>> AJ,
>>>>
>>>> Comments below.
>>>>
>>>> AJ wrote:
>>>>> Hi,
>>>>>
>>>>> I have a view implementation that displays my EMF model via this
>>>>> mechanism:
>>>>>
>>>>> treeViewer.setContentProvider(new
>>>>> AdapterFactoryContentProvider(adapterFactory));
>>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>>> new ADElementLabelDecorator()));
>>>>>
>>>>> However, now we would like to make use of the EMF databinding
>>>>> capability in 2.4 so I have tried to replace the above code with
>>>>> something similar to the one suggested in the EMF Recipes, as
>>>>> shown below:
>>>>>
>>>>> ObservableListTreeContentProvider provider = new
>>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>>
>>>
>>> Hum? For some reason, I don't have/see the Literal.
>> Maybe your model is huge and it's not generated in that case because
>> you can only have so many constants in an interface. What you have
>> is fine, it's just that a constant is a better faster.
>>>
>>>> This feature isn't really a list though...
>>>>> treeViewer.setContentProvider(provider);
>>>>> IObservableSet knownElements = provider.getKnownElements();
>>>>> IObservableMap[] observeMaps =
>>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>>> });
>>>>> ObservableMapLabelProvider labelProvider = new
>>>>> ObservableMapLabelProvider(observeMaps);
>>>>> treeViewer.setLabelProvider(labelProvider);
>>>>>
>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>> (MSLADLType)model,
>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>>
>>>>>
>>>>> But, I am getting this IllegalArgumentException: The feature
>>>>> 'mSLADL' is not a valid feature at the
>>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>>>> is called.
>>>> Is it being called for a DocumentRoot instance?
>>>
>>> No, it was not. So, I have changed to this:
>>>
>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>>
>>>
>>> However, it throws a ClassCastException at EObjectObservableList.
>>>
>>> java.lang.ClassCastException:
>>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>>> at
>>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>>
>>> at
>>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>>
>> Well, it's a single valued feature, so eGet won't return a list.
>> It sounds like you'd want observeValuoe.
>>>
>>>>>
>>>>> Although I have been using our best friend (the debugger) to trace
>>>>> the exception,
>>>> You've been reading the newsgroup a lot hey? :-P
>>>>> I would like to know first if anyone see any problems in the way I
>>>>> am setting up the treeviewer content and label providers for
>>>>> databinding. Unfortunately, the few examples available are using
>>>>> trableviewers instead of treeviewers.
>>>> What type of object is eOpenGet being called on. It will only work
>>>> for a document root instance...
>>>
>>> With the above change, eGet is now called instead of eOpenGet since
>>> the featureID value is 3.
>> That sounds like an improvement. You've just written it assuming a
>> list will come back when it's a single-valued feature (in the context
>> of a document root).
>>>
>>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>>> boolean coreType)
>>> {
>>> int featureID = eDerivedStructuralFeatureID(eFeature);
>>> if (featureID >= 0)
>>> {
>>> return eGet(featureID, resolve, coreType);
>>> }
>>> else
>>> {
>>> return eOpenGet(eFeature, resolve);
>>> }
>>> }
>>>
>>>>>
>>>>> Thanks in advance!
>>>>>
>>>
>>>
>>> ------------------------------------------------------------ ------------
>>>
>>>
>>
Ed Merks
Professional Support: https://www.macromodeling.com/
|
|
|
| Re: EMF databinding Recipe [message #420353 is a reply to message #420283] |
Wed, 25 June 2008 20:31 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi AJ,
I've started to checkout how to use the new support and here is how it
works (The trick is that you need a mediator for EMF).
I'm just writing an example application showing EMF&Databinding with 3.4
at its best:
> Soccer soccer = SoccerFactory.eINSTANCE.createSoccer();
> Association fifa = SoccerFactory.eINSTANCE.createAssociation();
> fifa.setName("FIFA");
> Association uefa = SoccerFactory.eINSTANCE.createAssociation();
> uefa.setName("UEFA");
> fifa.getChildren().add(uefa);
> soccer.setAssociation(fifa);
>
> viewer.setContentProvider(new ObservableListTreeContentProvider(new ObservableFactoryImpl(),new TreeStructureAdvisorImpl()));
> viewer.setLabelProvider(new LabelProvider());
> viewer.setInput(new WritableList(Collections.singletonList(fifa),Association.cla ss));
The helper classes:
> private class ObservableFactoryImpl implements IObservableFactory {
>
> public IObservable createObservable(Object target) {
> if( target instanceof IObservableList ) {
> return (IObservable) target;
> } else {
> return EMFObservables.listFactory(Realm.getDefault(), SoccerPackage.Literals.ASSOCIATION__CHILDREN).createObservab le(target);
> }
> }
>
> }
>
> private class TreeStructureAdvisorImpl extends TreeStructureAdvisor {
>
> @Override
> public Object getParent(Object element) {
> if( element instanceof Association ) {
> return ((Association)element).getParent();
> }
> return null;
> }
>
> @Override
> public Boolean hasChildren(Object element) {
> if( element instanceof Association ) {
> return ((Association)element).getChildren().size() > 0;
> }
>
> return false;
> }
>
> }
AJ schrieb:
> Ed,
>
> Good point regarding the observeValue and the single-valued feature.
> That did help, thanks!
>
> Now, the hookListener is throwing a ClassCastException saying: Cannot
> cast org.eclipse.emf.databinding.EObjectObservableValue to
> org.eclipse.emf.ecore.EObject
>
> protected void hookListener(Object domainElement)
> {
> ((EObject)domainElement).eAdapters().add(elementListener);
> }
>
>
> So, I am not sure what I am missing at this point.
>
>
> Thanks again Ed!
>
>
>
> Ed Merks wrote:
>> AJ,
>>
>> Comments below.
>>
>> AJ wrote:
>>> Hello, Ed,
>>>
>>> Please see my comments/answers below. Thanks!
>>>
>>>
>>> Ed Merks wrote:
>>>> AJ,
>>>>
>>>> Comments below.
>>>>
>>>> AJ wrote:
>>>>> Hi,
>>>>>
>>>>> I have a view implementation that displays my EMF model via this
>>>>> mechanism:
>>>>>
>>>>> treeViewer.setContentProvider(new
>>>>> AdapterFactoryContentProvider(adapterFactory));
>>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>>> new ADElementLabelDecorator()));
>>>>>
>>>>> However, now we would like to make use of the EMF databinding
>>>>> capability in 2.4 so I have tried to replace the above code with
>>>>> something similar to the one suggested in the EMF Recipes, as shown
>>>>> below:
>>>>>
>>>>> ObservableListTreeContentProvider provider = new
>>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>>
>>>
>>> Hum? For some reason, I don't have/see the Literal.
>> Maybe your model is huge and it's not generated in that case because
>> you can only have so many constants in an interface. What you have is
>> fine, it's just that a constant is a better faster.
>>>
>>>> This feature isn't really a list though...
>>>>> treeViewer.setContentProvider(provider);
>>>>> IObservableSet knownElements = provider.getKnownElements();
>>>>> IObservableMap[] observeMaps =
>>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>>> });
>>>>> ObservableMapLabelProvider labelProvider = new
>>>>> ObservableMapLabelProvider(observeMaps);
>>>>> treeViewer.setLabelProvider(labelProvider);
>>>>>
>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>> (MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>>
>>>>>
>>>>> But, I am getting this IllegalArgumentException: The feature
>>>>> 'mSLADL' is not a valid feature at the
>>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>>>> is called.
>>>> Is it being called for a DocumentRoot instance?
>>>
>>> No, it was not. So, I have changed to this:
>>>
>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>>
>>>
>>> However, it throws a ClassCastException at EObjectObservableList.
>>>
>>> java.lang.ClassCastException:
>>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>>> at
>>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>>
>>> at
>>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>>
>> Well, it's a single valued feature, so eGet won't return a list. It
>> sounds like you'd want observeValuoe.
>>>
>>>>>
>>>>> Although I have been using our best friend (the debugger) to trace
>>>>> the exception,
>>>> You've been reading the newsgroup a lot hey? :-P
>>>>> I would like to know first if anyone see any problems in the way I
>>>>> am setting up the treeviewer content and label providers for
>>>>> databinding. Unfortunately, the few examples available are using
>>>>> trableviewers instead of treeviewers.
>>>> What type of object is eOpenGet being called on. It will only work
>>>> for a document root instance...
>>>
>>> With the above change, eGet is now called instead of eOpenGet since
>>> the featureID value is 3.
>> That sounds like an improvement. You've just written it assuming a
>> list will come back when it's a single-valued feature (in the context
>> of a document root).
>>>
>>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>>> boolean coreType)
>>> {
>>> int featureID = eDerivedStructuralFeatureID(eFeature);
>>> if (featureID >= 0)
>>> {
>>> return eGet(featureID, resolve, coreType);
>>> }
>>> else
>>> {
>>> return eOpenGet(eFeature, resolve);
>>> }
>>> }
>>>
>>>>>
>>>>> Thanks in advance!
>>>>>
>>>
>>>
>>> ------------------------------------------------------------ ------------
>>>
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
|
|
|
| Re: EMF databinding Recipe [message #420355 is a reply to message #420283] |
Wed, 25 June 2008 21:28 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi AJ,
I don't think you are missing anything here and currently to me it looks
like a mismatch between EMF-Databinding and Beans-Databinding.
I think Boris, Ed and Matt should get together some time and discuss
what's wrong here.
Tom
AJ schrieb:
> Ed,
>
> Good point regarding the observeValue and the single-valued feature.
> That did help, thanks!
>
> Now, the hookListener is throwing a ClassCastException saying: Cannot
> cast org.eclipse.emf.databinding.EObjectObservableValue to
> org.eclipse.emf.ecore.EObject
>
> protected void hookListener(Object domainElement)
> {
> ((EObject)domainElement).eAdapters().add(elementListener);
> }
>
>
> So, I am not sure what I am missing at this point.
>
>
> Thanks again Ed!
>
>
>
> Ed Merks wrote:
>> AJ,
>>
>> Comments below.
>>
>> AJ wrote:
>>> Hello, Ed,
>>>
>>> Please see my comments/answers below. Thanks!
>>>
>>>
>>> Ed Merks wrote:
>>>> AJ,
>>>>
>>>> Comments below.
>>>>
>>>> AJ wrote:
>>>>> Hi,
>>>>>
>>>>> I have a view implementation that displays my EMF model via this
>>>>> mechanism:
>>>>>
>>>>> treeViewer.setContentProvider(new
>>>>> AdapterFactoryContentProvider(adapterFactory));
>>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>>> new ADElementLabelDecorator()));
>>>>>
>>>>> However, now we would like to make use of the EMF databinding
>>>>> capability in 2.4 so I have tried to replace the above code with
>>>>> something similar to the one suggested in the EMF Recipes, as shown
>>>>> below:
>>>>>
>>>>> ObservableListTreeContentProvider provider = new
>>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>>
>>>
>>> Hum? For some reason, I don't have/see the Literal.
>> Maybe your model is huge and it's not generated in that case because
>> you can only have so many constants in an interface. What you have is
>> fine, it's just that a constant is a better faster.
>>>
>>>> This feature isn't really a list though...
>>>>> treeViewer.setContentProvider(provider);
>>>>> IObservableSet knownElements = provider.getKnownElements();
>>>>> IObservableMap[] observeMaps =
>>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>>> });
>>>>> ObservableMapLabelProvider labelProvider = new
>>>>> ObservableMapLabelProvider(observeMaps);
>>>>> treeViewer.setLabelProvider(labelProvider);
>>>>>
>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>> (MSLADLType)model, ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>>
>>>>>
>>>>> But, I am getting this IllegalArgumentException: The feature
>>>>> 'mSLADL' is not a valid feature at the
>>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>>>> is called.
>>>> Is it being called for a DocumentRoot instance?
>>>
>>> No, it was not. So, I have changed to this:
>>>
>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>>
>>>
>>> However, it throws a ClassCastException at EObjectObservableList.
>>>
>>> java.lang.ClassCastException:
>>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>>> at
>>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>>
>>> at
>>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>>
>> Well, it's a single valued feature, so eGet won't return a list. It
>> sounds like you'd want observeValuoe.
>>>
>>>>>
>>>>> Although I have been using our best friend (the debugger) to trace
>>>>> the exception,
>>>> You've been reading the newsgroup a lot hey? :-P
>>>>> I would like to know first if anyone see any problems in the way I
>>>>> am setting up the treeviewer content and label providers for
>>>>> databinding. Unfortunately, the few examples available are using
>>>>> trableviewers instead of treeviewers.
>>>> What type of object is eOpenGet being called on. It will only work
>>>> for a document root instance...
>>>
>>> With the above change, eGet is now called instead of eOpenGet since
>>> the featureID value is 3.
>> That sounds like an improvement. You've just written it assuming a
>> list will come back when it's a single-valued feature (in the context
>> of a document root).
>>>
>>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>>> boolean coreType)
>>> {
>>> int featureID = eDerivedStructuralFeatureID(eFeature);
>>> if (featureID >= 0)
>>> {
>>> return eGet(featureID, resolve, coreType);
>>> }
>>> else
>>> {
>>> return eOpenGet(eFeature, resolve);
>>> }
>>> }
>>>
>>>>>
>>>>> Thanks in advance!
>>>>>
>>>
>>>
>>> ------------------------------------------------------------ ------------
>>>
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
|
|
|
| Re: EMF databinding Recipe [message #420358 is a reply to message #420355] |
Wed, 25 June 2008 21:56 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Just that it is not lost. The hookListener-method is never called in
case of BeansObservables.
I think we should file a bug.
Tom
Tom Schindl schrieb:
> Hi AJ,
>
> I don't think you are missing anything here and currently to me it looks
> like a mismatch between EMF-Databinding and Beans-Databinding.
>
> I think Boris, Ed and Matt should get together some time and discuss
> what's wrong here.
>
> Tom
>
> AJ schrieb:
>> Ed,
>>
>> Good point regarding the observeValue and the single-valued feature.
>> That did help, thanks!
>>
>> Now, the hookListener is throwing a ClassCastException saying: Cannot
>> cast org.eclipse.emf.databinding.EObjectObservableValue to
>> org.eclipse.emf.ecore.EObject
>>
>> protected void hookListener(Object domainElement)
>> {
>> ((EObject)domainElement).eAdapters().add(elementListener);
>> }
>>
>>
>> So, I am not sure what I am missing at this point.
>>
>>
>> Thanks again Ed!
>>
>>
>>
>> Ed Merks wrote:
>>> AJ,
>>>
>>> Comments below.
>>>
>>> AJ wrote:
>>>> Hello, Ed,
>>>>
>>>> Please see my comments/answers below. Thanks!
>>>>
>>>>
>>>> Ed Merks wrote:
>>>>> AJ,
>>>>>
>>>>> Comments below.
>>>>>
>>>>> AJ wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I have a view implementation that displays my EMF model via this
>>>>>> mechanism:
>>>>>>
>>>>>> treeViewer.setContentProvider(new
>>>>>> AdapterFactoryContentProvider(adapterFactory));
>>>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>>>> new ADElementLabelDecorator()));
>>>>>>
>>>>>> However, now we would like to make use of the EMF databinding
>>>>>> capability in 2.4 so I have tried to replace the above code with
>>>>>> something similar to the one suggested in the EMF Recipes, as
>>>>>> shown below:
>>>>>>
>>>>>> ObservableListTreeContentProvider provider = new
>>>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>>>
>>>>
>>>> Hum? For some reason, I don't have/see the Literal.
>>> Maybe your model is huge and it's not generated in that case because
>>> you can only have so many constants in an interface. What you have
>>> is fine, it's just that a constant is a better faster.
>>>>
>>>>> This feature isn't really a list though...
>>>>>> treeViewer.setContentProvider(provider);
>>>>>> IObservableSet knownElements = provider.getKnownElements();
>>>>>> IObservableMap[] observeMaps =
>>>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>>>> });
>>>>>> ObservableMapLabelProvider labelProvider = new
>>>>>> ObservableMapLabelProvider(observeMaps);
>>>>>> treeViewer.setLabelProvider(labelProvider);
>>>>>>
>>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>>> (MSLADLType)model,
>>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>>>
>>>>>>
>>>>>> But, I am getting this IllegalArgumentException: The feature
>>>>>> 'mSLADL' is not a valid feature at the
>>>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>>>>> is called.
>>>>> Is it being called for a DocumentRoot instance?
>>>>
>>>> No, it was not. So, I have changed to this:
>>>>
>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>>>
>>>>
>>>> However, it throws a ClassCastException at EObjectObservableList.
>>>>
>>>> java.lang.ClassCastException:
>>>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>>>> at
>>>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>>>
>>>> at
>>>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>>>
>>> Well, it's a single valued feature, so eGet won't return a list.
>>> It sounds like you'd want observeValuoe.
>>>>
>>>>>>
>>>>>> Although I have been using our best friend (the debugger) to trace
>>>>>> the exception,
>>>>> You've been reading the newsgroup a lot hey? :-P
>>>>>> I would like to know first if anyone see any problems in the way I
>>>>>> am setting up the treeviewer content and label providers for
>>>>>> databinding. Unfortunately, the few examples available are using
>>>>>> trableviewers instead of treeviewers.
>>>>> What type of object is eOpenGet being called on. It will only work
>>>>> for a document root instance...
>>>>
>>>> With the above change, eGet is now called instead of eOpenGet since
>>>> the featureID value is 3.
>>> That sounds like an improvement. You've just written it assuming a
>>> list will come back when it's a single-valued feature (in the context
>>> of a document root).
>>>>
>>>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>>>> boolean coreType)
>>>> {
>>>> int featureID = eDerivedStructuralFeatureID(eFeature);
>>>> if (featureID >= 0)
>>>> {
>>>> return eGet(featureID, resolve, coreType);
>>>> }
>>>> else
>>>> {
>>>> return eOpenGet(eFeature, resolve);
>>>> }
>>>> }
>>>>
>>>>>>
>>>>>> Thanks in advance!
>>>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------ ------------
>>>>
>>>>
>>>
>
>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
|
|
|
| Re: EMF databinding Recipe [message #420370 is a reply to message #420355] |
Thu, 26 June 2008 15:50 |
Al B
Messages: 130
Registered: July 2009 |
Senior Member |
|
|
Hi Tom,
So, does it mean that there are still problems when one tries to utilize
the platform databinding API in conjunction with the EMF databinding
interface?
Thanks,
-AJ
Tom Schindl wrote:
> Hi AJ,
>
> I don't think you are missing anything here and currently to me it looks
> like a mismatch between EMF-Databinding and Beans-Databinding.
>
> I think Boris, Ed and Matt should get together some time and discuss
> what's wrong here.
>
> Tom
>
> AJ schrieb:
>> Ed,
>>
>> Good point regarding the observeValue and the single-valued feature.
>> That did help, thanks!
>>
>> Now, the hookListener is throwing a ClassCastException saying: Cannot
>> cast org.eclipse.emf.databinding.EObjectObservableValue to
>> org.eclipse.emf.ecore.EObject
>>
>> protected void hookListener(Object domainElement)
>> {
>> ((EObject)domainElement).eAdapters().add(elementListener);
>> }
>>
>>
>> So, I am not sure what I am missing at this point.
>>
>>
>> Thanks again Ed!
>>
>>
>>
>> Ed Merks wrote:
>>> AJ,
>>>
>>> Comments below.
>>>
>>> AJ wrote:
>>>> Hello, Ed,
>>>>
>>>> Please see my comments/answers below. Thanks!
>>>>
>>>>
>>>> Ed Merks wrote:
>>>>> AJ,
>>>>>
>>>>> Comments below.
>>>>>
>>>>> AJ wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I have a view implementation that displays my EMF model via this
>>>>>> mechanism:
>>>>>>
>>>>>> treeViewer.setContentProvider(new
>>>>>> AdapterFactoryContentProvider(adapterFactory));
>>>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>>>> new ADElementLabelDecorator()));
>>>>>>
>>>>>> However, now we would like to make use of the EMF databinding
>>>>>> capability in 2.4 so I have tried to replace the above code with
>>>>>> something similar to the one suggested in the EMF Recipes, as
>>>>>> shown below:
>>>>>>
>>>>>> ObservableListTreeContentProvider provider = new
>>>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>>>
>>>>
>>>> Hum? For some reason, I don't have/see the Literal.
>>> Maybe your model is huge and it's not generated in that case because
>>> you can only have so many constants in an interface. What you have
>>> is fine, it's just that a constant is a better faster.
>>>>
>>>>> This feature isn't really a list though...
>>>>>> treeViewer.setContentProvider(provider);
>>>>>> IObservableSet knownElements = provider.getKnownElements();
>>>>>> IObservableMap[] observeMaps =
>>>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>>>> });
>>>>>> ObservableMapLabelProvider labelProvider = new
>>>>>> ObservableMapLabelProvider(observeMaps);
>>>>>> treeViewer.setLabelProvider(labelProvider);
>>>>>>
>>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>>> (MSLADLType)model,
>>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>>>
>>>>>>
>>>>>> But, I am getting this IllegalArgumentException: The feature
>>>>>> 'mSLADL' is not a valid feature at the
>>>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when setInput
>>>>>> is called.
>>>>> Is it being called for a DocumentRoot instance?
>>>>
>>>> No, it was not. So, I have changed to this:
>>>>
>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>>>
>>>>
>>>> However, it throws a ClassCastException at EObjectObservableList.
>>>>
>>>> java.lang.ClassCastException:
>>>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>>>> at
>>>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>>>
>>>> at
>>>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>>>
>>> Well, it's a single valued feature, so eGet won't return a list.
>>> It sounds like you'd want observeValuoe.
>>>>
>>>>>>
>>>>>> Although I have been using our best friend (the debugger) to trace
>>>>>> the exception,
>>>>> You've been reading the newsgroup a lot hey? :-P
>>>>>> I would like to know first if anyone see any problems in the way I
>>>>>> am setting up the treeviewer content and label providers for
>>>>>> databinding. Unfortunately, the few examples available are using
>>>>>> trableviewers instead of treeviewers.
>>>>> What type of object is eOpenGet being called on. It will only work
>>>>> for a document root instance...
>>>>
>>>> With the above change, eGet is now called instead of eOpenGet since
>>>> the featureID value is 3.
>>> That sounds like an improvement. You've just written it assuming a
>>> list will come back when it's a single-valued feature (in the context
>>> of a document root).
>>>>
>>>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>>>> boolean coreType)
>>>> {
>>>> int featureID = eDerivedStructuralFeatureID(eFeature);
>>>> if (featureID >= 0)
>>>> {
>>>> return eGet(featureID, resolve, coreType);
>>>> }
>>>> else
>>>> {
>>>> return eOpenGet(eFeature, resolve);
>>>> }
>>>> }
>>>>
>>>>>>
>>>>>> Thanks in advance!
>>>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------ ------------
>>>>
>>>>
>>>
>
>
|
|
|
| Re: EMF databinding Recipe [message #420371 is a reply to message #420370] |
Thu, 26 June 2008 16:04 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi AJ,
I didn't get to the bottom of the problem yesterday and today in the
evening I don't have time because I need to watch soccer :-)
I have a small test EMF model for an example application I writing which
I will attach to a bug report when ready.
As far as I can see now the problem is in the content provider which is
build the knowElements but I haven't yet understood how this is supposed
to work I simply stepped through it with the debugger and found out that
in case of Beans-Example it is not trying to attach a listener to the
IObservableSet but I have no idea why :-(
Tom
AJ schrieb:
> Hi Tom,
>
> So, does it mean that there are still problems when one tries to utilize
> the platform databinding API in conjunction with the EMF databinding
> interface?
>
> Thanks,
> -AJ
>
>
> Tom Schindl wrote:
>> Hi AJ,
>>
>> I don't think you are missing anything here and currently to me it
>> looks like a mismatch between EMF-Databinding and Beans-Databinding.
>>
>> I think Boris, Ed and Matt should get together some time and discuss
>> what's wrong here.
>>
>> Tom
>>
>> AJ schrieb:
>>> Ed,
>>>
>>> Good point regarding the observeValue and the single-valued feature.
>>> That did help, thanks!
>>>
>>> Now, the hookListener is throwing a ClassCastException saying: Cannot
>>> cast org.eclipse.emf.databinding.EObjectObservableValue to
>>> org.eclipse.emf.ecore.EObject
>>>
>>> protected void hookListener(Object domainElement)
>>> {
>>> ((EObject)domainElement).eAdapters().add(elementListener);
>>> }
>>>
>>>
>>> So, I am not sure what I am missing at this point.
>>>
>>>
>>> Thanks again Ed!
>>>
>>>
>>>
>>> Ed Merks wrote:
>>>> AJ,
>>>>
>>>> Comments below.
>>>>
>>>> AJ wrote:
>>>>> Hello, Ed,
>>>>>
>>>>> Please see my comments/answers below. Thanks!
>>>>>
>>>>>
>>>>> Ed Merks wrote:
>>>>>> AJ,
>>>>>>
>>>>>> Comments below.
>>>>>>
>>>>>> AJ wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I have a view implementation that displays my EMF model via this
>>>>>>> mechanism:
>>>>>>>
>>>>>>> treeViewer.setContentProvider(new
>>>>>>> AdapterFactoryContentProvider(adapterFactory));
>>>>>>> treeViewer.setLabelProvider(new DecoratingLabelProvider(new
>>>>>>> AdapterFactoryLabelProvider(adapterFactory),
>>>>>>> new ADElementLabelDecorator()));
>>>>>>>
>>>>>>> However, now we would like to make use of the EMF databinding
>>>>>>> capability in 2.4 so I have tried to replace the above code with
>>>>>>> something similar to the one suggested in the EMF Recipes, as
>>>>>>> shown below:
>>>>>>>
>>>>>>> ObservableListTreeContentProvider provider = new
>>>>>>> ObservableListTreeContentProvider(EMFObservables.listFactory (Realm.getDefault(),
>>>>>>> ADPackage.eINSTANCE.getDocumentRoot_MSLADL()), null);
>>>>>> Probably ADPackage.Literals.DOCUMENT_ROOT__MSLADL is more efficient.
>>>>>
>>>>>
>>>>> Hum? For some reason, I don't have/see the Literal.
>>>> Maybe your model is huge and it's not generated in that case because
>>>> you can only have so many constants in an interface. What you have
>>>> is fine, it's just that a constant is a better faster.
>>>>>
>>>>>> This feature isn't really a list though...
>>>>>>> treeViewer.setContentProvider(provider);
>>>>>>> IObservableSet knownElements = provider.getKnownElements();
>>>>>>> IObservableMap[] observeMaps =
>>>>>>> EMFObservables.observeMaps(knownElements, new EStructuralFeature[] {
>>>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs(),
>>>>>>> ADPackage.eINSTANCE.getMSLADLType_AuthorInformation()
>>>>>>> });
>>>>>>> ObservableMapLabelProvider labelProvider = new
>>>>>>> ObservableMapLabelProvider(observeMaps);
>>>>>>> treeViewer.setLabelProvider(labelProvider);
>>>>>>>
>>>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>>>> (MSLADLType)model,
>>>>>>> ADPackage.eINSTANCE.getMSLADLType_ActivityDefs()));
>>>>>>>
>>>>>>>
>>>>>>> But, I am getting this IllegalArgumentException: The feature
>>>>>>> 'mSLADL' is not a valid feature at the
>>>>>>> BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1062 when
>>>>>>> setInput is called.
>>>>>> Is it being called for a DocumentRoot instance?
>>>>>
>>>>> No, it was not. So, I have changed to this:
>>>>>
>>>>> getViewer().setInput(EMFObservables.observeList(Realm.getDef ault(),
>>>>> ((MSLADLType)model).eContainer(),ADPackage.eINSTANCE.getDocu mentRoot_MSLADL()));
>>>>>
>>>>>
>>>>> However, it throws a ClassCastException at EObjectObservableList.
>>>>>
>>>>> java.lang.ClassCastException:
>>>>> gov.nasa.ensemble.jfa.activityDictionary.model.impl.MSLADLTy peImpl
>>>>> at
>>>>> org.eclipse.emf.databinding.EObjectObservableList.<init>(EObjectObservableList.java:52)
>>>>>
>>>>> at
>>>>> org.eclipse.emf.databinding.EMFObservables.observeList(EMFOb servables.java:81)
>>>>>
>>>> Well, it's a single valued feature, so eGet won't return a list.
>>>> It sounds like you'd want observeValuoe.
>>>>>
>>>>>>>
>>>>>>> Although I have been using our best friend (the debugger) to
>>>>>>> trace the exception,
>>>>>> You've been reading the newsgroup a lot hey? :-P
>>>>>>> I would like to know first if anyone see any problems in the way
>>>>>>> I am setting up the treeviewer content and label providers for
>>>>>>> databinding. Unfortunately, the few examples available are using
>>>>>>> trableviewers instead of treeviewers.
>>>>>> What type of object is eOpenGet being called on. It will only
>>>>>> work for a document root instance...
>>>>>
>>>>> With the above change, eGet is now called instead of eOpenGet since
>>>>> the featureID value is 3.
>>>> That sounds like an improvement. You've just written it assuming a
>>>> list will come back when it's a single-valued feature (in the
>>>> context of a document root).
>>>>>
>>>>> public Object eGet(EStructuralFeature eFeature, boolean resolve,
>>>>> boolean coreType)
>>>>> {
>>>>> int featureID = eDerivedStructuralFeatureID(eFeature);
>>>>> if (featureID >= 0)
>>>>> {
>>>>> return eGet(featureID, resolve, coreType);
>>>>> }
>>>>> else
>>>>> {
>>>>> return eOpenGet(eFeature, resolve);
>>>>> }
>>>>> }
>>>>>
>>>>>>>
>>>>>>> Thanks in advance!
>>>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------ ------------
>>>>>
>>>>>
>>>>
>>
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
|
|
| |
| Re: EMF databinding Recipe [message #420391 is a reply to message #420353] |
Fri, 27 June 2008 19:09 |
Al B
Messages: 130
Registered: July 2009 |
Senior Member |
|
|
Hey Tom,
I have been experimenting with your mediator approach and I have
encountered a couple of problems.
If I use a WritableList to set the viewer's input, it causes a
ClassCastException in the EObjectObservableMap::hookListener because it is
expecting an EObject instead.
Also, in my case, I need to display the container for the ActivityDef
elements; which is a single valued feature. So, I need to call
EMFObservables.valueFactory instead of EMFObservables.listFactory, as
shown below. However,
ObservableCollectionTreeContentProvider::initChildren is always assuming
that createObservable will return an IObservableCollection causing it to
throw a ClassCastException as well.
return EMFObservables.valueFactory(Realm.getDefault(),
MSLADLPackage.Literals.MSLADL_TYPE__ACTIVITY_DEFS)
.createObservable((target instanceof CategoriesItemProvider) ?
((CategoriesItemProvider) target).getParent(target) : target);
MSLADLType
|
|->ActivityDefs
|
|-->ActivityDef1
|
|-->ActivityDef2
|
|-->ActivityDefN
I might be missing something, but it seems to me that there are still some
integration problems between EMF and the Platform/JFace databinding.
|
|
| | | |
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