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How to force EMF not to manipulate reference ids [message #1691906]

Fri, 10 April 2015 08:15

Eclipse User

Having the following code I'm loading a BPMN model.

// dummy URI, loading done through input stream
URI uri = URI.createURI("data.bpmn");
ResourceSet resourceSet = new ResourceSetImpl();
Resource resource = resourceSet.createResource(uri, "org.eclipse.bpmn2.content-type.xml");
resource.load(contentStream, null);

Saving the resource resource.save(null); manipulates the output and adds data.bpmn# to references:

<bpmndi:BPMNShape id="BPMNShape_StartEvent_1" bpmnElement="data.bpmn#StartEvent_1">
    <dc:Bounds height="36.0" width="36.0" x="162.0" y="182.0"/>
        <bpmndi:BPMNLabel id="BPMNLabel_1" labelStyle="data.bpmn#BPMNLabelStyle_1">
            <dc:Bounds height="15.0" width="68.0" x="146.0" y="218.0"/>
        </bpmndi:BPMNLabel>
</bpmndi:BPMNShape>

Where it looks like this coming from the input stream:

<bpmndi:BPMNShape id="BPMNShape_StartEvent_1" bpmnElement="StartEvent_1">
    <dc:Bounds height="36.0" width="36.0" x="162.0" y="182.0"/>
        <bpmndi:BPMNLabel id="BPMNLabel_1" labelStyle="BPMNLabelStyle_1">
            <dc:Bounds height="15.0" width="68.0" x="146.0" y="218.0"/>
        </bpmndi:BPMNLabel>
</bpmndi:BPMNShape>

Is there a way to force EMF not to manipulate the references?

Re: How to force EMF not to manipulate reference ids [message #1691908 is a reply to message #1691906]

Fri, 10 April 2015 08:24

Eclipse User

Flavio,

Don't use a relative URI to load resources. Use an absolute URI. Where
are you expecting "data.bpmn" to actually exist? If it's in the
workspace, use a URI.createPlatformResourceURI with the full path in the
workspace. If it's in the file system, use File.getAbsolutePath() and
then use URI.createFileURI from that result.

On 10/04/2015 2:16 PM, Flavio Donze wrote:
> Having the following code I'm loading a BPMN model.
>
> // dummy URI, loading done through input stream
> URI uri = URI.createURI("data.bpmn");
> ResourceSet resourceSet = new ResourceSetImpl();
> Resource resource = resourceSet.createResource(uri,
> "org.eclipse.bpmn2.content-type.xml");
> resource.load(contentStream, null);
>
> Saving the resource resource.save(null); manipulates the output and
> adds data.bpmn# to references:
>
> <bpmndi:BPMNShape id="BPMNShape_StartEvent_1"
> bpmnElement="data.bpmn#StartEvent_1">
> <dc:Bounds height="36.0" width="36.0" x="162.0" y="182.0"/>
> <bpmndi:BPMNLabel id="BPMNLabel_1"
> labelStyle="data.bpmn#BPMNLabelStyle_1">
> <dc:Bounds height="15.0" width="68.0" x="146.0" y="218.0"/>
> </bpmndi:BPMNLabel>
> </bpmndi:BPMNShape>
>
> Where it looks like this coming from the input stream:
>
> <bpmndi:BPMNShape id="BPMNShape_StartEvent_1" bpmnElement="StartEvent_1">
> <dc:Bounds height="36.0" width="36.0" x="162.0" y="182.0"/>
> <bpmndi:BPMNLabel id="BPMNLabel_1" labelStyle="BPMNLabelStyle_1">
> <dc:Bounds height="15.0" width="68.0" x="146.0" y="218.0"/>
> </bpmndi:BPMNLabel>
> </bpmndi:BPMNShape>
>
> Is there a way to force EMF not to manipulate the references?
>

Re: How to force EMF not to manipulate reference ids [message #1691912 is a reply to message #1691908]

Fri, 10 April 2015 08:38

Eclipse User

Hi Ed,

Thanks for your very fast reply!

Actually I don't want to use an URI at all, since the model is loaded from the input stream (source is a database).
Is there a way to do that?
If not, creating a dummy temp file and using this as URI would solve the issue?

greets
Flavio

Re: How to force EMF not to manipulate reference ids [message #1691913 is a reply to message #1691912]

Fri, 10 April 2015 08:44

Eclipse User

Flavio,

Then use a fake absolute URI, dummy:/whatever. Presumably you do a save
passing in an output stream, not as you've shown in your sample code...

On 10/04/2015 2:38 PM, Flavio Donze wrote:
> Hi Ed,
> Thanks for your very fast reply!
>
> Actually I don't want to use an URI at all, since the model is loaded
> from the input stream (source is a database). Is there a way to do that?
> If not, creating a dummy temp file and using this as URI would solve
> the issue?
>
> greets
> Flavio
>

Re: How to force EMF not to manipulate reference ids [message #1691935 is a reply to message #1691913]

Fri, 10 April 2015 09:53

Eclipse User

Sorry the "resource.save(null);" was wrong I actually use an OutputStream.

I created a small test case, the references are still manipulated but are not "data.bpmn#ID" anymore, now they are "#ID".

		// previously storing the database input stream to dataFile, file looks OK
		InputStream in = new FileInputStream(dataFile);
		ResourceSet resourceSet = new ResourceSetImpl();
		URI modelUri = URI.createFileURI("d:/temp/data.bpmn");
		Resource resource = resourceSet.createResource(modelUri, "org.eclipse.bpmn2.content-type.xml");
		resource.load(in, null);
		in.close();

		OutputStream outputStream = new FileOutputStream(dataFile);
		resource.save(outputStream, null);
		outputStream.close();
		// now the file contains #ID as references

Using URI modelUri = URI.createFileURI("data.bpmn"); will result in "data.bpmn#ID" again.
The file "d:/temp/data.bpmn" does not exist.

Is there maybe some save option or hook to handle this?

Thanks for your help
Flavio

Re: How to force EMF not to manipulate reference ids [message #1691943 is a reply to message #1691935]

Fri, 10 April 2015 12:16

Eclipse User

Flavio,

Comments below.

On 10/04/2015 3:53 PM, Flavio Donze wrote:
> Sorry the "resource.save(null);" was wrong I actually use an
> OutputStream.
>
> I created a small test case, the references are still manipulated but
> are not "data.bpmn#ID" anymore, now they are "#ID".
>
>
> // previously storing the database input stream to dataFile,
> file looks OK
> InputStream in = new FileInputStream(dataFile);
> ResourceSet resourceSet = new ResourceSetImpl();
> URI modelUri = URI.createFileURI("d:/temp/data.bpmn");
> Resource resource = resourceSet.createResource(modelUri,
> "org.eclipse.bpmn2.content-type.xml");
Which resource factory ends up creating which type of resource?
Presumably tou're expecting something registered by the BPMN2 project.
The factory should create the right type of resource with the right
options, but that's a BPMN2 question, so probably better to ask on their
forum.
> resource.load(in, null);
> in.close();
>
> OutputStream outputStream = new FileOutputStream(dataFile);
> resource.save(outputStream, null);
> outputStream.close();
> // now the file contains #ID as references
>
>
> Using URI modelUri = URI.createFileURI("data.bpmn"); will result in
> "data.bpmn#ID" again.
> The file "d:/temp/data.bpmn" does not exist.
>
> Is there maybe some save option or hook to handle this?
>
> Thanks for your help
> Flavio

Re: How to force EMF not to manipulate reference ids [message #1692109 is a reply to message #1691943]

Mon, 13 April 2015 09:47

Eclipse User

This is the factory class used by BPMN: org.eclipse.bpmn2.util.Bpmn2ResourceFactoryImpl

Here is how the resource is created:

    public Resource createResource(URI uri) {
        Bpmn2ResourceImpl result = new Bpmn2ResourceImpl(uri);
        ExtendedMetaData extendedMetadata = new XmlExtendedMetadata();
        result.getDefaultSaveOptions().put(XMLResource.OPTION_EXTENDED_META_DATA, extendedMetadata);
        result.getDefaultLoadOptions().put(XMLResource.OPTION_EXTENDED_META_DATA, extendedMetadata);

        result.getDefaultSaveOptions().put(XMLResource.OPTION_SAVE_TYPE_INFORMATION,
                new OnlyContainmentTypeInfo());

        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);

        result.getDefaultSaveOptions().put(XMLResource.OPTION_ELEMENT_HANDLER,
                new ElementHandlerImpl(true));

        result.getDefaultSaveOptions().put(XMLResource.OPTION_ENCODING, "UTF-8");

        return result;
    }

Can any of those options cause this?

greets
Flavio

Re: How to force EMF not to manipulate reference ids [message #1692111 is a reply to message #1692109]

Mon, 13 April 2015 10:02

Eclipse User

Flavio,

I would generally expect a #<id> to appear. But that depends on what
funky things the BPMN2 folks have in their specialized
XmlExtendedMetaData. Is there any reason you should not expect it to
appear as #<id>? In any case, the implementation of this will
determine which save style is used in
org.eclipse.emf.ecore.xmi.impl.XMLSaveImpl.saveFeatures(EObject,
boolean). Again, this is a question best asked on the BPMN2 folks.

On 13/04/2015 3:47 PM, Flavio Donze wrote:
> This is the factory class used by BPMN:
> org.eclipse.bpmn2.util.Bpmn2ResourceFactoryImpl
>
> Here is how the resource is created:
> public Resource createResource(URI uri) {
> Bpmn2ResourceImpl result = new Bpmn2ResourceImpl(uri);
> ExtendedMetaData extendedMetadata = new XmlExtendedMetadata();
> result.getDefaultSaveOptions().put(XMLResource.OPTION_EXTENDED_META_DATA,
> extendedMetadata);
> result.getDefaultLoadOptions().put(XMLResource.OPTION_EXTENDED_META_DATA,
> extendedMetadata);
>
> result.getDefaultSaveOptions().put(XMLResource.OPTION_SAVE_TYPE_INFORMATION,
> new OnlyContainmentTypeInfo());
>
> 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);
>
> result.getDefaultSaveOptions().put(XMLResource.OPTION_ELEMENT_HANDLER,
> new ElementHandlerImpl(true));
>
> result.getDefaultSaveOptions().put(XMLResource.OPTION_ENCODING, "UTF-8");
>
> return result;
> }
>
>
> Can any of those options cause this?
>
> greets
> Flavio

Re: How to force EMF not to manipulate reference ids [message #1692549 is a reply to message #1692111]

Thu, 16 April 2015 08:38

Eclipse User

For the record, this is how I solved it:

	ResourceSet resourceSet = new ResourceSetImpl();
	XMLResource resource = (XMLResource) resourceSet.createResource(modelUri, "org.eclipse.bpmn2.content-type.xml");
	XMLResource.URIHandler uriHandler = new URIHandlerImpl() {
		@Override
		public URI deresolve(URI uri) {
			// make sure references are stored without # URI prefix
			return URI.createURI(uri.fragment());
		}
	};
	resource.getDefaultSaveOptions().put(XMLResource.OPTION_URI_HANDLER, uriHandler);

	resource.load(inputStream, null);

greets
Flavio

[Updated on: Thu, 16 April 2015 09:24] by Moderator

Re: How to force EMF not to manipulate reference ids [message #1695415 is a reply to message #1692549]

Thu, 14 May 2015 07:07

Eclipse User

thanks same problem and proposed solution work out for me as well. Many thanks.

BR,
Bhuvan

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