[news.eclipse.modeling.m2m] Re: QVT XSD

[min.kong@xxxxxxxxxxxxxxxxx (Min)]

Sergey,

I downloaded the modified jar, and was going to replace the original one 
with it. But I have problem opening the jar with Winzip - "Cannot open 
file: it does not appear to be a valid archive."

Subsequently, in my .qvto, the line: 
"import library org.eclipse.m2m.qvt.oml.ocl.emf.libraries.XSDUtil;"
doesn't compile in Eclipse - "Library '..... XSDUtil' not found."

Could you upload the modified jar again please? Thanks.

-Min



> Sergey Boyko wrote:

> Hello,

> Ed, thank you for pointing about XSD serialization issues.

> So for XSDSchema initialization QVT script intends to use custom 
> library. Short howto about these libraries was answered in thread
> "[QVTO] Adding custom operations for primitive data types" some time ago.

> I've attached modified 'org.eclipse.m2m.qvt.oml.ocl.emf.libraries' 
> plugin that provides easy XSDUtil functionality.
> Original qvto script (that produced same output as java-code) is changed 
> to the follow:

> modeltype ecore uses ecore('http://www.eclipse.org/emf/2002/Ecore');
> modeltype XSD uses "http://www.eclipse.org/xsd/2002/XSD";;

> transformation interop2xsd(in interop: ecore , out XSD);

> import library org.eclipse.m2m.qvt.oml.ocl.emf.libraries.XSDUtil;

> main(in interopModel: EClass, out xsd: XSD::XSDSchema) {
> 	xsd:= interopModel.map interop2Xsd();
> }

> mapping EClass::interop2Xsd() : XSD::XSDSchema {
> init {
> 	var schemaTargetNamespace := 'DUMMY';
> 	var schemaTargetPrefix := 'tns';

> 	var schemaForSchemaNamespace := 'http://www.w3.org/2001/XMLSchema';
> 	var schemaForSchemaPrefix := 'xsd';

> 	result := object xsd::XSDSchema {		
> 		targetNamespace:= schemaTargetNamespace;
> 	};

> 	result := result.setSchemaForSchemaQNamePrefix(schemaForSchemaPrefix);
> 	result := 
> result.putIntoQNamePrefixToNamespaceMap(schemaForSchemaPrefix, 
> schemaForSchemaNamespace);
> 	result := result.putIntoQNamePrefixToNamespaceMap(schemaTargetPrefix, 
> schemaTargetNamespace);

> }
> }




> Regards,
>    Sergey.


> Ed Merks wrote:
> > Sergey,
> >
> > Just note that XSD wasn't designed to serialize as XMI:
> >
> >       https://bugs.eclipse.org/bugs/show_bug.cgi?id=166638
> >
> >
> > It's there some way to accomplish what's done like this with the Java 
> > APIs can be expressed in QVT?
> >
> >     
http://download.eclipse.org/modeling/emf/emf/javadoc/xsd/2.4.0/org/eclipse/xsd/util/XSDPrototypicalSchema.html#initializePrototypeSchema()
> >     
<http://download.eclipse.org/modeling/emf/emf/javadoc/xsd/2.4.0/org/eclipse/xsd/util/XSDPrototypicalSchema.html#initializePrototypeSchema%28%29>
> > Sergey Boyko wrote:
> > > Hi Min,
> > >
> > > I'm not quite familiar with XSDResourceImpl but seems that your case 
> > > somehow depends on ones behavior. Namely on 
> > > XSDResourceImpl.serialize(..) impl.
> > >
> > > For your case just try to specify output URI with file extension 
> > > differ from ".xsd" (for example ".xsde"). That way I've got the 
> > > following output:
> > >
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <xsd:XSDSchema xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"; 
> > > xmlns:xsd="http://www.eclipse.org/xsd/2002/XSD"; argetNamespace="DUMMY"/>
> > >
> > >
> > > Regards,
> > >   Sergey.
> > >
> > > Min wrote:
> > > > Hi,
> > > >
> > > > 1. QVT -
> > > >
> > > > Executing the following .qvto :
> > > >
> > > >    modeltype INTEROP uses "http://ms.com/interop";;
> > > >    modeltype XSD uses "http://www.eclipse.org/xsd/2002/XSD";;
> > > >
> > > >    transformation interop2xsd(in interop: INTEROP , out XSD);
> > > >        main(in interopModel: INTEROP::InteropSchema, out xsd: 
> > > > XSD::XSDSchema) {
> > > >     xsd:= interopModel.map interop2Xsd();
> > > >    }
> > > >
> > > >    mapping INTEROP::InteropSchema::interop2Xsd() : XSD::XSDSchema {
> > > >     targetNamespace := 'DUMMY';
> > > >    }
> > > >
> > > > with OUT target file specifies as <something>.xsd, produces:
> > > >
> > > >    <?xml version="1.0" encoding="UTF-8"?>
> > > >    <schema targetNamespace="DUMMY"/>
> > > >
> > > > which does not look like a valid xsd schema root element.
> > > >
> > > > 2. Java-
> > > > On the other hand, running the following Java code:
> > > >
> > > >    class Schema {
> > > >
> > > >     private XSDFactory _xsdFactory;
> > > >     private XSDSchema _schema;
> > > >     private ByteArrayOutputStream _outputStream = new 
> > > > ByteArrayOutputStream();
> > > >         private Schema() {
> > > >         _xsdFactory = XSDFactory.eINSTANCE;
> > > >         initSchema();       }
> > > >     private void initSchema() {
> > > >         _schema = _xsdFactory.createXSDSchema();
> > > >         _schema.setTargetNamespace("DUMMY");
> > > >                _schema.setSchemaForSchemaQNamePrefix("xsd");
> > > >         Map<String, String> qNamePrefixToNamespaceMap 
> > > > =_schema.getQNamePrefixToNamespaceMap();
> > > >        qNamePrefixToNamespaceMap.put("tns", 
> > > > _schema.getTargetNamespace());
> > > >        
> > > > qNamePrefixToNamespaceMap.put(_schema.getSchemaForSchemaQNamePrefix(), 
> > > > XSDConstants.SCHEMA_FOR_SCHEMA_URI_2001);
> > > >                  _schema.updateElement();
> > > >             }
> > > >     private String serialize() {
> > > >         XSDResourceImpl.serialize(_outputStream, _schema.getDocument());
> > > >         return _outputStream.toString();
> > > >     }
> > > >         public static void main(String [ ] args) {
> > > >         Schema schema = new Schema();
> > > >         System.out.println(schema.serialize());
> > > >     }
> > > >    }
> > > >
> > > > produces, in stdout:
> > > >
> > > >   <?xml version="1.0" encoding="UTF-8"?>
> > > >   <xsd:schema xmlns:tns="DUMMY" 
> > > > xmlns:xsd="http://www.w3.org/2001/XMLSchema";  targetNamespace="DUMMY"/>
> > > >
> > > > which looks like a valid xsd schema document root.
> > > >
> > > >
> > > > 3. Question: how would one achieve the equivalence of 2. above,
> > > > with a QVT transform? I.e., how would one re-write the .qvto in 1. to 
> > > > get the output produced in 2. ?
> > > >
> > > >
> > > > Thanks.
> > > >
> > > > -Min