Home » Modeling » M2T (model-to-text transformation) » [Xtend] Wrong parameter type
| [Xtend] Wrong parameter type [message #525412] |
Tue, 06 April 2010 14:21  |
 MaximeLecourt 
Messages: 108
Registered: February 2010
Location: France |
Senior Member |
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Still trying my m2m transformation with Xtend, I get a problem with types.
| Quote: | import metamodel;
import relationnel;
extension metamodel::Extensions reexport;
extension object2relationnal::SQLExtensions reexport;
//takes a Package as parameter, and creating a Database from it
create relationnel::Base transform (metamodel::Package p) :
this.setTables(p.classes().createTable());
// transforms all classes into SQL tables
create relationnel::Table createTable (metamodel::Class c) :
this.setName(c.name) ->
this.setColumn(c.attributs().createColumn());
// create a Column for every attribute which is not a composition or agregation
create relationnel::Column createColumn(metamodel::Attribute a) :
this.setName(a.name) ->
this.setType(a.type.name);
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On last line, I get "couldn't find operation 'setType(String)' for type 'relationnel::Column'
But type is an Eattribute of Column, points to Type (abstract), which is either a Domain or a Datatype.
All of those types have only one Eattribute, called name, of type EString (inherited).
So what is wrong ?
One day I shall master M2T, but that day has yet to come...
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| Re: [Xtend] Wrong parameter type [message #525438 is a reply to message #525412] |
Tue, 06 April 2010 15:04  |
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An EAttribute cannot refer to an EClass, only to EDatatype. If you have the need to refer to another type then ise an EReference instead of EAttribute.
So 'type' in Column should rather be an EReference.
HTH,
~Karsten
Need professional support for Xtext, EMF, Eclipse IDE?
Go to: http://devhub.karakun.com
Twitter : @kthoms
Blog : www.karsten-thoms.de
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 Re: [Xtend] Wrong parameter type [message #525598 is a reply to message #525412] |
Wed, 07 April 2010 06:21 |
MaximeLecourt
Messages: 108
Registered: February 2010
Location: France |
Senior Member |
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I'm sorry, I made a dumb mistake writing my former post, type is a EReference, and references Type, it's not a EAttribute.
That is the complete message I get running the workflow.
0 INFO WorkflowRunner - --------------------------------------------------------------------------------------
0 INFO WorkflowRunner - EMF Modeling Workflow Engine 0.7.2, Build v200908120417
0 INFO WorkflowRunner - (c) 2005-2009 openarchitectureware.org and contributors
0 INFO WorkflowRunner - --------------------------------------------------------------------------------------
0 INFO WorkflowRunner - running workflow: C:/Documents and Settings/Lecourt/workspace/genCPP/src/object2relationnal/m2m.mwe
0 INFO WorkflowRunner -
281 INFO StandaloneSetup - Registering platform uri 'C:\Documents and Settings\Lecourt\workspace'
390 INFO StandaloneSetup - Adding dynamic EPackage 'http://www.example.org/metamodel' from 'platform:/resource/genCPP/src/metamodel/metamodel.ecore'
390 INFO StandaloneSetup - Adding dynamic EPackage 'http://relationnel/1.0' from 'platform:/resource/genCPP/src/metamodel/relationnel.ecore'
484 INFO CompositeComponent - Reader: Loading model from src/Model.xmi
500 INFO CompositeComponent - XtendComponent: executing 'object2relationnal::object2relationnal'
812 ERROR AbstractExpressionsUsingWorkflowComponent - Error in Component of type org.eclipse.xtend.XtendComponent:
EvaluationException : Couldn't find operation 'setType(String)' for relationnel::Column.
object2relationnal::object2relationnal.ext[671,25] on line 19 'this.setType(a.type.name)'
object2relationnal::object2relationnal.ext[462,28] on line 14 'c.attributs().createColumn()'
object2relationnal::object2relationnal.ext[284,25] on line 9 'p.classes().createTable()'
nofile[0,16] on line 1 'transform(model)'
812 ERROR WorkflowRunner - Workflow interrupted. Reason: Couldn't find operation 'setType(String)' for relationnel::Column.
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: this.setType(a.type.name); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: this.setName(a.name)->this.setType(a.type.name); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: c.attributs().createColumn(); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: this.setColumn(c.attributs().createColumn()); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: this.setName(c.name)->this.setColumn(c.attributs().createColumn()); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: p.classes().createTable(); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: this.setTables(p.classes().createTable()); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
812 ERROR WorkflowRunner - [ERROR]: Couldn't find operation 'setType(String)' for relationnel::Column.(Element: transform(model); Reported by: XtendComponent: executing 'object2relationnal::object2relationnal')
Weirdly, since yesterday, when running the workflow messages are in black and no more in red, and are displayed differently than before.
One day I shall master M2T, but that day has yet to come...
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| Re: [Xtend] Wrong parameter type [message #525610 is a reply to message #525606] |
Wed, 07 April 2010 07:47 |
MaximeLecourt
Messages: 108
Registered: February 2010
Location: France |
Senior Member |
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I'm only interested in the name of the type.
To simplify modelisation, I created types in my source metamodel (GBool, GInteger, and so on), but I don't need that in my destination model, which I want to use to generate SQL. I only need the name, and with Xpand I'll print the according SQL type in my sql file.
Do you think I should modify my metamodel and have the EReference Type become a EAttribute (which would be a GString) ?
I thought I could just map the types from my source model into a generic Datatype, using type (the EReference) to keep the type, and name to keep (obviously) the name.
So having a GBool called isActive in my source model, in destination model I would get a Column, of type GBool, of name isActive, and I would use that in Xpand to generate my sql file.
I guess I understand where the problem lies, GBool doesn't exist as a type in my destination metamodel. As Type is abstract, and can be a Datatype, or a Domain, I have to think about it again.
One day I shall master M2T, but that day has yet to come...
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