Home » Modeling » EMF » Extend a Model via ExtendedMetaData Interface
| Extend a Model via ExtendedMetaData Interface [message #1083047] |
Fri, 09 August 2013 07:49  |
Eclipse User |
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Hello,
I have a little problem to merge two EMF models.
Situation:
I have two Models generated from a XSD Schema. "Model B" extends "Model A" via the ExtendendMetaData interface. I created the Object "Method" from "Model B" and would like to include it in the "addData" Object of "Model A".
Code snippes from the XSD "Model A":
<xsd:complexType name="addData">
<xsd:annotation>
<xsd:documentation>Application specific data defined in external schemata </xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:element name="data" minOccurs="0" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
[b]<xsd:any namespace="##any"[/b] processContents="lax"/>
</xsd:sequence>
<xsd:attribute name="name" type="xsd:anyURI" use="required">
<xsd:annotation>
<xsd:documentation>Uniquely identifies the additional data element.</xsd:documentation>
</xsd:annotation>
</xsd:attribute>
<xsd:attribute name="handleUnknown" use="required">
<xsd:annotation>
<xsd:documentation>Recommended processor handling for unknown data elements.
Specifies if the processor should try to preserve the additional data element, dismiss the element (e.g. because the data is invalid if not updated correctly) or use the processors default behaviour for unknown data.</xsd:documentation>
</xsd:annotation>
<xsd:simpleType>
<xsd:restriction base="xsd:NMTOKEN">
<xsd:enumeration value="preserve"/>
<xsd:enumeration value="discard"/>
<xsd:enumeration value="implementation"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:attribute>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
My Code looks like this:
// Create DataType1 Object from ModelA
DataType1 dataType = ModelAFactory.createDataType1();
dataType.setName("myLINK");
dataType.setHandleUnknown(HandleUnknownType.IMPLEMENTATION);
// Create MethodType Object from ModelB
MethodType methodType = ModelBFactory.createMethodType();
methodType.setName("Iam a method");
// Bring it together
ExtendedMetaData extendedMetaData = ExtendedMetaData.INSTANCE;
Entry entry = FeatureMapUtil.createEntry(extendedMetaData.demandFeature("", "", true), methodType);
dataType.getAny().add(entry);
// Save Model as XML
URI fileUri = URI.createFileURI(new File(fbGen.getOutputpath() + "//Test.xml").getPath());
Resource res = resourceSet.createResource(fileUri);
// Add UTF-8 encoding option
Map<String, Object> options = new HashMap<String, Object>();
options.put(XMLResource.OPTION_ENCODING, "UTF-8");
options.put(XMLResource.OPTION_DECLARE_XML, Boolean.TRUE);
options.put(XMLResource.OPTION_EXTENDED_META_DATA, metadata );
// Save the content
res.getContents().add(fbGen.getPlcOpen());
res.save(options);
The result is:
<data handleUnknown="implementation" name="myLINK">
<_1:Method name="Iam a method">
<interface>
<localVars>
<variable name="Name">
<type>
<sINT/>
</type>
<initialValue/>
<documentation>
<xhtml>Mycomment</xhtml>
</documentation>
</variable>
</localVars>
</interface>
</_1:Method>
</data>
But it should looks like this:
<data name="myLINK" handleUnknown="implementation">
<Method name="Iam a method">
<interface>
<localVars>
<variable name="Name">
<type>
<sINT/>
</type>
<initialValue/>
<documentation>
<xhtml>Mycomment</xhtml>
</documentation>
</variable>
</localVars>
</interface>
</Method>
</data>
Why is the prefix "_1" set before the "Method"? What can I do to generate the XML file correctly?
Greetz
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| Re: Extend a Model via ExtendedMetaData Interface [message #1083196 is a reply to message #1083047] |
Fri, 09 August 2013 12:01  |
| Eclipse User |
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Max,
Comments below.
On 09/08/2013 3:41 PM, Max Power wrote:
> Hello,
>
> I have a little problem to merge two EMF models.
> Situation:
> I have two Models generated from a XSD Schema. "Model B" extends
> "Model A" via the ExtendendMetaData interface. I created the Object
> "Method" from "Model B" and would like to include it in the "addData"
> Object of "Model A".
>
> Code snippes from the XSD "Model A":
>
> <xsd:complexType name="addData">
> <xsd:annotation>
> <xsd:documentation>Application specific data defined in
> external schemata </xsd:documentation>
> </xsd:annotation>
> <xsd:sequence>
> <xsd:element name="data" minOccurs="0" maxOccurs="unbounded">
> <xsd:complexType>
> <xsd:sequence>
> <xsd:any namespace="##any"
> processContents="lax"/>
> </xsd:sequence>
> <xsd:attribute name="name" type="xsd:anyURI"
> use="required">
> <xsd:annotation>
> <xsd:documentation>Uniquely identifies the
> additional data element.</xsd:documentation>
> </xsd:annotation>
> </xsd:attribute>
> <xsd:attribute name="handleUnknown" use="required">
> <xsd:annotation>
> <xsd:documentation>Recommended processor
> handling for unknown data elements.
> Specifies if the processor should try to preserve the additional data
> element, dismiss the element (e.g. because the data is invalid if not
> updated correctly) or use the processors default behaviour for unknown
> data.</xsd:documentation>
> </xsd:annotation>
> <xsd:simpleType>
> <xsd:restriction base="xsd:NMTOKEN">
> <xsd:enumeration value="preserve"/>
> <xsd:enumeration value="discard"/>
> <xsd:enumeration value="implementation"/>
> </xsd:restriction>
> </xsd:simpleType>
> </xsd:attribute>
> </xsd:complexType>
> </xsd:element>
> </xsd:sequence>
> </xsd:complexType>
>
>
>
> My Code looks like this:
>
> // Create DataType1 Object from ModelA
> DataType1 dataType = ModelAFactory.createDataType1();
> dataType.setName("myLINK");
> dataType.setHandleUnknown(HandleUnknownType.IMPLEMENTATION);
>
> // Create MethodType Object from ModelB
> MethodType methodType = ModelBFactory.createMethodType();
> methodType.setName("Iam a method");
>
> // Bring it together
> ExtendedMetaData extendedMetaData = ExtendedMetaData.INSTANCE;
> Entry entry =
> FeatureMapUtil.createEntry(extendedMetaData.demandFeature("", "",
> true), methodType);
Hmmm. Why doesn't the feature have a name? I.e., shouldn't it be
extendedMetaData.demandFeature("", "Method", true)?
>
> dataType.getAny().add(entry);
>
> // Save Model as XML
> URI fileUri = URI.createFileURI(new File(fbGen.getOutputpath() +
> "//Test.xml").getPath());
> Resource res = resourceSet.createResource(fileUri);
>
> // Add UTF-8 encoding option
> Map<String, Object> options = new HashMap<String, Object>();
> options.put(XMLResource.OPTION_ENCODING, "UTF-8");
> options.put(XMLResource.OPTION_DECLARE_XML, Boolean.TRUE);
> options.put(XMLResource.OPTION_EXTENDED_META_DATA, metadata );
> // Save the content
> res.getContents().add(fbGen.getPlcOpen());
> res.save(options);
>
> The result is:
>
> <data handleUnknown="implementation" name="myLINK">
> <_1:Method name="Iam a method">
> <interface>
> <localVars>
> <variable name="Name">
> <type>
> <sINT/>
> </type>
> <initialValue/>
> <documentation>
> <xhtml>Mycomment</xhtml>
> </documentation>
> </variable>
> </localVars>
> </interface>
> </_1:Method>
> </data>
>
>
> But it should looks like this:
>
> <data name="myLINK" handleUnknown="implementation">
> <Method name="Iam a method">
> <interface>
> <localVars>
> <variable name="Name">
> <type>
> <sINT/>
> </type>
> <initialValue/>
> <documentation>
> <xhtml>Mycomment</xhtml>
> </documentation>
> </variable>
> </localVars>
> </interface>
> </Method>
> </data>
>
>
> Why is the prefix "_1" set before the "Method"?
Is there an xmlns declaration from _1?
> What can I do to generate the XML file correctly?
>
> Greetz
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| Re: Extend a Model via ExtendedMetaData Interface [message #1083281 is a reply to message #1083242] |
Fri, 09 August 2013 14:49 |
| Eclipse User |
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Max,
That's very odd. If
http://www.theserverside.com/news/1364302/Binding-XML-to-Java doesn't
solve the problem (e.g., use null for the first argument rather than "",
and use "Method" for the second argument) can you zip up the projects
(or some other reproducible test case) and attach them so I can have a
closer look?
On 09/08/2013 7:37 PM, Max Power wrote:
> Hi,
> Quote:
>> Hmmm. Why doesn't the feature have a name? I.e., shouldn't it be
>> extendedMetaData.demandFeature("", "Method", true)?
>
> I have tried everything, with a name, without a name, but it had not
> effect on the result.
>
> Quote:
>> Is there an xmlns declaration from _1?
>
> There is no xmlns declaration. It looks like an automatically
> generated prefix.
> I'm not a big EMF expert, but maybe it has something to do with the
> open/save options?
>
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| Re: Extend a Model via ExtendedMetaData Interface [message #1105718 is a reply to message #1091529] |
Tue, 10 September 2013 03:40 |
| Eclipse User |
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Max,
Sorry for taking so long to follow up...
The problem here is that "Inheritance" is an anonymous complex type, so
it's not possible to serialize an instance of such a thing using an
xsi:type because that requires a named type. The serializer recognizes
this situation and determines the name of the enclosing element for that
complex type and uses that instead. But that element isn't a global
element declaration which further confuses the situation.
I'm not sure what to suggest, but the thing you're trying to
achieve---serialize an instance of Inheritance (an anonymous type) under
a wildcard---isn't achievable/expressible with the schemas you've defined.
On 21/08/2013 6:19 PM, Ed Merks wrote:
> Max,
>
> I'm not seeing attachments in Thunderbird. Maybe I see them in the
> web forum; I'll check tomorrow.
>
>
> On 20/08/2013 1:02 PM, Max Power wrote:
>> Hello,
>>
>> the attachment from my previous post includes contains a test case.
>> If you execute the main class in the PLCOpen package the file
>> model.xml is automatically generated.
>> The final xml file looks like this:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <project xmlns="plcopen.org/xml/tc6_0201">
>> <types>
>> <pous>
>> <pou name="Pou Name">
>> <addData>
>> <data handleUnknown="implementation"
>> name="3s-software.com/plcopenxml/pouinheritance">
>> <_1:Inheritance>
>> <Extends>MyType</Extends>
>> </_1:Inheritance>
>> </data>
>> </addData>
>> </pou>
>> </pous>
>> </types>
>> </project>
>>
>>
>> The Problem is the "_1:" prefix.
>> This is the important code snippet:
>>
>> /*
>> * Create content
>> */
>> ProjectType projectType = factory.createProjectType();
>> TypesType typesType = factory.createTypesType();
>> PousType pousType = factory.createPousType();
>> AddData addData = factory.createAddData();
>> PouType1 pouType1 = factory.createPouType1();
>>
>> pouType1.setName("Pou Name");
>>
>> // Add model extension code
>> DataType1 dataType = factory.createDataType1();
>> dataType.setName("3s-software.com/plcopenxml/pouinheritance");
>> dataType.setHandleUnknown(HandleUnknownType.IMPLEMENTATION);
>>
>> InheritanceType inhertitanceType =
>> codesysFactory.createInheritanceType();
>> inhertitanceType.setExtends("MyType");
>>
>> // Here is the problem!!! ExtendedMetaData
>> extendedMetaData = ExtendedMetaData.INSTANCE;
>> Entry entry =
>> FeatureMapUtil.createEntry(extendedMetaData.demandFeature(null, "",
>> true), inhertitanceType);
>> dataType.getAny().add(entry);
>>
>> addData.getData().add(dataType);
>> pouType1.setAddData(addData);
>> pousType.getPou().add(pouType1);
>> typesType.setPous(pousType);
>> projectType.setTypes(typesType);
>>
>> documentRoot.setProject(projectType);
>>
>>
>> I hope it is now clear!
>>
>>
>
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