 Validation error while data binding [message #1760527] |
Fri, 28 April 2017 06:16  |
 Muniraj K A
Messages: 11
Registered: May 2016 |
Junior Member |
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I am developing an rcp application where I bind my UI widgets in the editor to the model objects. Whenever I modify the text box value in my UI, the bound model object's attribute is updated properly but it however shows a validation error message called "An error occurred while setting the value" in my control decorator. No idea why this validation error message is shown every time a character is entered into the text box.
My data binding code is as follows:
public void initDataBinding(EObject selectedObjectDef, EObject selectedObject, Widget widget) {
EMFDataBindingContext bindingContext = new EMFDataBindingContext();
IObservableValue modelObservableVal = EMFObservables.observeValue(selectedObject, selectedObject.eClass()
.getEStructuralFeature(EcucdescriptionPackage.ECUC_TEXTUAL_PARAM_VALUE__VALUE));
ISWTObservableValue targetObservableVal = WidgetProperties.text(SWT.Modify).observe(widget);
Binding bindValue = bindingContext.bindValue(targetObservableVal, modelObservableVal);
ControlDecorationSupport.create(bindValue, SWT.TOP | SWT.LEFT);
}
On further debugging I found this error is thrown by one of the super classes called BasicNotifierImpl#eNotify()
1 public void eNotify(Notification notification)
2 {
3 Adapter[] eAdapters = eBasicAdapterArray();
4 if (eAdapters != null && eDeliver())
5 {
6 for (int i = 0, size = eAdapters.length; i < size; ++i)
7 {
8 eAdapters[i].notifyChanged(notification);
9 }
10 }
11 }
at line no.8 when i == 1, giving java.lang.IllegalStateException: Cannot modify resource set without a write transaction. I tried using an editing domain but still I get the same exception. But in the UI, validation msg shown is "An error occurred while setting the value" even before I use an UpdateValueStrategy validator.
Any help is greatly appreciated. Thanks in anticipation.
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| Re: Validation error while data binding [message #1760825 is a reply to message #1760563] |
Wed, 03 May 2017 11:15  |
Muniraj K A
Messages: 11
Registered: May 2016 |
Junior Member |
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modifying initDataBinding() method as below does not work properly :
public void initDataBinding(EObject selectedObjectDef, EObject selectedObject, Widget widget) {
EMFDataBindingContext bindingContext = new EMFDataBindingContext();
IObservableValue modelObservableVal = EMFEditObservables.observeValue(editingDomain, selectedObject, selectedObject.eClass()
.getEStructuralFeature(EcucdescriptionPackage.ECUC_NUMERICAL_PARAM_VALUE__VALUE));
ISWTObservableValue targetObservableVal = WidgetProperties.text(SWT.Modify).observe(widget);
Binding bindValue = bindingContext.bindValue(targetObservableVal, modelObservableVal);
ControlDecorationSupport.create(bindValue, SWT.TOP | SWT.LEFT);
}
Data binding happens properly when IObservableValue is created for the attribute with id EcucdescriptionPackage.
ECUC_TEXTUAL_PARAM_VALUE__VALUE but does not when it is created for the attribute with id EcucdescriptionPackage.
ECUC_NUMERICAL_PARAM_VALUE__VALUE as in the above code. This is because in the earlier case the bound model object's
(Bean) Attribute TYPE is 'String' but in the latter case it is an 'Object'(binding does not happen). Should I add converter?
What is the mistake I am making? please help me.
[Updated on: Wed, 03 May 2017 11:17] Report message to a moderator |
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| Re: Validation error while data binding [message #1760958 is a reply to message #1760865] |
Thu, 04 May 2017 14:58 |
Muniraj K A
Messages: 11
Registered: May 2016 |
Junior Member |
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Hi Mr Ed Merks, the Model design is not in my control actually. I am just binding my UI widgets to the existing model attributes provided by the artop. The user in my application enters numerical values(Integer or float), I am binding this value in the widget to the existing model object(EcucNumericalParamValue provided by artop)'s attribute called value. After realising that, this value attribute's EDataType is NumericalValueVariationPoint which is not serializable I changed my binding code as follows :
1 public void initDataBinding(EObject selectedObjectDef, EObject selectedObject, Widget widget) {
2 EMFDataBindingContext bindingContext = new EMFDataBindingContext();
3
4 NumericalValueVariationPoint numValueVP = ((EcucNumericalParamValue) selectedObject).getValue();
5 FeatureMap mixedFeatureMap = numValueVP.getMixed();
6 Entry entry = mixedFeatureMap.get(0);
7 EStructuralFeature feature = entry.getEStructuralFeature();
8 ISWTObservableValue modelObservableVal = EMFEditObservables.observeValue(editingDomain, entry, feature);
9
10 ISWTObservableValue targetObservableVal = WidgetProperties.text(SWT.Modify).observe(widget);
11 Binding bindValue = bindingContext.bindValue(targetObservableVal, modelObservableVal);
12 ControlDecorationSupport.create(bindValue, SWT.TOP | SWT.LEFT);
13 }
Now the EDataType of 'feature' is String which should support data binding. But in the above code, I get a compile time error at line no.8 saying "The method observeValue(EditingDomain, EObject, EStructuralFeature) in the type EMFEditObservables is not applicable for the arguments (TransactionalEditingDomain, FeatureMap.Entry, EStructuralFeature)". I am not getting the EObject to pass as the 2nd argument to EMFEditObservables.observeValue() method. I have attached the EcucNumericalParamValueImpl.class file which has the model Object attributes I am binding, for your reference(autosar40.ecucdescription.impl.EcucNumericalParamValueImpl). Or is there a way to bind the Object(NumericalValueVariationPoint) itself? It was difficult for me to implement as per your suggestion in the previous reply, So I did this way. Kindly help me in resolving this problem. Thank you.
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| Re: Validation error while data binding [message #1761002 is a reply to message #1760958] |
Fri, 05 May 2017 08:27 |
Ed Merks
Messages: 33133
Registered: July 2009 |
Senior Member |
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I can't do anything with a .class file. You can't observe an entry; an entry's value can never change. What features does NumericalValueVariationPoint have, other than the mixed feature? It might be the case that EMFEditObservables.observeValue(editingDomain, numValueVP , feature) works, but I don't know what kind of feature 'feature" is...
Ed Merks
Professional Support: https://www.macromodeling.com/
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