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xsd to Ecore: Trouble with xsd:Extension [message #1852429]

Mon, 16 May 2022 10:35

Anne Hermann

Messages: 3
Registered: May 2022

Junior Member

Hello,

I am having problems with extensions in my xsd. I used the xsd to build an ecore model and then generated my java code.

In my xsd I have the following code:

<xsd:complexType ecore:name="DistinctRowsNodeType" name="distinctRowsNode_._type">
    <xsd:complexContent>
      <xsd:extension base="nodes_._type">
        <xsd:sequence>
          <xsd:element maxOccurs="unbounded" minOccurs="0" ref="inputs" />
        </xsd:sequence>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
  <xsd:complexType ecore:name="NodesType" name="nodes_._type">
    <xsd:attribute name="id" type="xsd:string" />
    <xsd:attribute name="location" type="xsd:string" />
    <xsd:attribute name="nodeClassId" type="xsd:string" />
    <xsd:attribute name="nodeName" type="xsd:string" />
  </xsd:complexType>

Now I am trying to read an XML document and everything works fine until this section:

 <nodes>           
            <distinctRowsNode id="fEH_EvE2CEq_mwx6TPx9Yg" nodeClassId="PVTOVUhxYEWWtVDhyu58Mg" nodeName="distinct-rows" location="830,396">
                <inputs>
                    <input parameter="Source">
                        <source id="P98crK3zdU-IbZv4Hm55Zw" node="nt3QKwi-QUCdwfYzi99O3Q"/>
                        <source id="mM2APobMOk-8Ih27ENmxWg" node="HG8wjtoWpUixOpInRCWBDA"/>
                        <source id="r-kvCD8OQUWVvAmdqp0CLQ" node="HeRo9bY0mUWX76DYwr5VNA"/>
                        <source id="ig-0PotDBkmdlAQboi7_LQ" node="-HXQss6mlESysB_mW7D4jA"/>
                      </input>
                      <input parameter="Columns">
                        <source id="aSfVqrhdAkWz0ySflGp3fg"/>
                      </input>
                   </inputs>
            </distinctRowsNode>
</nodes>

This is the error I get:

org.eclipse.emf.ecore.resource.Resource$IOWrappedException: Feature 'distinctRowsNode' not found. (, 657, 140)
at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.handleErrors(XMLLoadImpl.java:77)
at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:185)
at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:261)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1563)
at app.XMLConverter.ConvertLowCodeXML(XMLConverter.java:48)
at app.App.main(App.java:13)

If you need more information to solve this, please let me know. I don't understand why distinctRowsNode can't be read :(

Thanks you all
Anne

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Re: xsd to Ecore: Trouble with xsd:Extension [message #1852447 is a reply to message #1852429]

Mon, 16 May 2022 17:31

Ed Merks

Messages: 33141
Registered: July 2009

Senior Member

Are you using the generated XyzResourceFactoryImpl to create the resource that is being used to load this instance? Set a breakpoint in its createResource method to be sure.

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: xsd to Ecore: Trouble with xsd:Extension [message #1852449 is a reply to message #1852447]

Mon, 16 May 2022 18:56

Anne Hermann

Messages: 3
Registered: May 2022

Junior Member

This is my code to load a XML:

xyzPackage pack = xyzPackageImpl.init();
ResourceSet resourceSet = new ResourceSetImpl();
resourceSet.getPackageRegistry().put(pack.getNsURI(), pack);
resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put("xml", new XMLResourceFactoryImpl());

XMLResourceImpl resource = new XMLResourceImpl();

try {
			resource.load(new FileInputStream(new File(PATH_TO_XML).getAbsolutePath()), Collections.EMPTY_MAP);
} catch (FileNotFoundException e1) {
			System.out.println("Datei konnte nicht gefunden werden.");
			e1.printStackTrace();
} catch (IOException e1) {
			System.out.println("Datei konnte nicht eingelesen werden.");
			e1.printStackTrace();
}

return (DocumentRoot) resource.getContents().get(0);

I don't think that I am using the XyzResourceFactoryImpl

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Re: xsd to Ecore: Trouble with xsd:Extension [message #1852456 is a reply to message #1852449]

Tue, 17 May 2022 06:33

Ed Merks

Messages: 33141
Registered: July 2009

Senior Member

I asked because the generated resource factor's create method looks like this:

	/**
	 * Creates an instance of the resource.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Resource createResource(URI uri) {
		XMLResource result = new DcResourceImpl(uri);
		result.getDefaultSaveOptions().put(XMLResource.OPTION_EXTENDED_META_DATA, Boolean.TRUE);
		result.getDefaultLoadOptions().put(XMLResource.OPTION_EXTENDED_META_DATA, Boolean.TRUE);

		result.getDefaultSaveOptions().put(XMLResource.OPTION_SCHEMA_LOCATION, Boolean.TRUE);

		result.getDefaultLoadOptions().put(XMLResource.OPTION_USE_ENCODED_ATTRIBUTE_STYLE, Boolean.TRUE);
		result.getDefaultSaveOptions().put(XMLResource.OPTION_USE_ENCODED_ATTRIBUTE_STYLE, Boolean.TRUE);

		result.getDefaultLoadOptions().put(XMLResource.OPTION_USE_LEXICAL_HANDLER, Boolean.TRUE);
		return result;
	}

Without those options, it's not going to work. Worse still, you don't actually use a resource factory or the resource set at all, you directly create an XMLResourceImpl.

I'd suggest invoking Generate Test Code and look for the XyzExample.java. The generated main method will show how to read and write resources properly/correctly. Copy and paste from that...

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: xsd to Ecore: Trouble with xsd:Extension [message #1852461 is a reply to message #1852456]

Tue, 17 May 2022 08:47

Anne Hermann

Messages: 3
Registered: May 2022

Junior Member

thanks for the hint!

So I've changed it to this:

ResourceSet resourceSet = new ResourceSetImpl();
resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put(Resource.Factory.Registry.DEFAULT_EXTENSION,  new xyzResourceFactoryImpl());
resourceSet.getPackageRegistry().put(xyzPackage.eNS_URI, xyzPackage.eINSTANCE);
				
File file = new File(PATH_TO_XML);
URI uri = file.isFile() ? URI.createFileURI(file.getAbsolutePath()): URI.createURI(PATH_TO_XML);
		
try {
		Resource resource = resourceSet.getResource(uri, true);
		System.out.println("Loaded " + uri);
		return (DocumentRoot) resource.getContents().get(0);

	} catch (RuntimeException exception) {
		System.out.println("Problem loading " + uri);
		exception.printStackTrace();
	}

but I still have the same problem. Everything is read just fine until the distinctRowsNode.

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Re: xsd to Ecore: Trouble with xsd:Extension [message #1852462 is a reply to message #1852461]

Tue, 17 May 2022 09:23

Ed Merks

Messages: 33141
Registered: July 2009

Senior Member

Given you haven't shown anything in a schema with an element definition named distinctRowsNode I cannot guess what could be wrong. Is the serialization you are trying to read one that you produced yourself with this model or it came from somewhere else?

Ed Merks
Professional Support: https://www.macromodeling.com/

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