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Re: [gmt-dev] Error occurs while combining Xtext and Xtend.

Hi Xiaorui,

it seems that your workflow file is an invalid xml file.
This has nothing to do with Workflow internals or Xtend just XML syntax.

regards,
Sven

On May 18, 2007, at 22:04 , Xiaorui Zhang wrote:

Hi,
I am new to Xtend, and using it in my course project. In my project, first I use Xtext to define the dsl syntax. Then I want to transform the instance of the generated syntax ecore to the instance of another ecore( also EmfMetaModel which is different from the uml2->emfmetamodel example). The following presents what I've written:

For the workflow :
<property name='targetDir' value='src-gen/'/>
<component class="org.example.parser.ParserComponent">
<metaModel class=" oaw.type.emf.EmfMetaModel "
metaModelFile="siwadsl.ecore" />
<modelFile value="${modelFile}"/>
<outputSlot value='theModel'/>
</component>
<component class=" oaw.xtend.XtendComponent">

<metaModel class="oaw.type.emf.EmfMetaModel">
<metaModelFile value="dsl.ecore" />
</metaModel>
<metaModel class=" oaw.type.emf.EmfMetaModel">
<metaModelFile value="dsl.ecore" />
</metaModel>
<invoke value="org::example::transform::transform(theModel)/>
<outputSlot value="transformed_model"/>
</component>
<component class="oaw.emf.XmiWriter">
<modelFile value="out.xmi"/>
<inputSlot value="transformed_model"/>

</component>
</workflow>


For the transform.ext file:
import dsl;
import dsl;
create xxmodel this transform(xxmodel m):
   setName( m.name)->
   xxxelement.addAll(m.xxxelement);
.....

After running the workflow, I got error messages below:
406 ERROR WorkflowParser - The value of attribute "value" associated with an element type "invoke" must not contain the '<' character.
org.xml.sax.SAXParseException: The value of attribute "value" associated with an element type "invoke" must not contain the '<' character.
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException (Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError (Unknown Source)
at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)
at org.apache.xerces.impl.XMLScanner.scanAttributeValue(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanAttribute (Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse (Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at org.openarchitectureware.workflow.ast.parser.WorkflowParser.parse(WorkflowParser.java:81)
at org.openarchitectureware.workflow.ast.util.VisitorInitializer.visitInclusionAST (VisitorInitializer.java:115)
at org.openarchitectureware.workflow.ast.util.VisitorBase.visit(VisitorBase.java:34)
at org.openarchitectureware.workflow.ast.AbstractASTBase.accept(AbstractASTBase.java:40)
at org.openarchitectureware.workflow.ast.util.VisitorInitializer.traverseChildren (VisitorInitializer.java:61)
at org.openarchitectureware.workflow.ast.util.VisitorInitializer.visitComponentAST(VisitorInitializer.java:70)
at org.openarchitectureware.workflow.ast.util.VisitorBase.visit(VisitorBase.java :37)
at org.openarchitectureware.workflow.ast.AbstractASTBase.accept(AbstractASTBase.java:40)
at org.openarchitectureware.workflow.ast.util.WorkflowFactory.parseAndInitialize(WorkflowFactory.java:107)
at org.openarchitectureware.workflow.ast.util.WorkflowFactory.parseInitAndCreate (WorkflowFactory.java:58)
at org.openarchitectureware.workflow.ast.util.WorkflowFactory.parseInitAndCreate(WorkflowFactory.java:53)
at org.openarchitectureware.workflow.WorkflowRunner.prepare(WorkflowRunner.java:208)
at org.openarchitectureware.workflow.WorkflowRunner.run(WorkflowRunner.java:169)
at org.openarchitectureware.workflow.WorkflowRunner.main(WorkflowRunner.java:122)
422 ERROR WorkflowRunner - The value of attribute "value" associated with an element type "invoke" must not contain the '<' character. [org/example/generator.oaw]
422 ERROR WorkflowRunner - Workflow interrupted because of configuration errors.

As shown above, the error message "
The value of attribute "value" associated with an element type "invoke" must not contain the '<' character. [org/example/generator.oaw]" really got me confused. Why did it find a  the '<' character?

Does anyone can give me some clues? Is there anything wrong with my workflow configuration and extension file? Thank you in advance.

Regards,
Xiaorui









--
Best regards!
Sincerely yours,
Zhang Xiaorui
Master student of ICT,
Agder University College
mob: +47 9429 8603
mailTo : zxrvillain@xxxxxxxxx
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Sven Efftinge

Am Sophienhof 33
24941 Flensburg

fon   : +49 176 21769757