| Loading proxy resources [message #395962] |
Fri, 30 September 2005 15:16  |
Eclipse User |
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Originally posted by: bdberry.us.ibm.com
ok, I have the objects in my model saving to seperate files. I can load
the parent object from its file fine and I see that the proxy object is
described as...
com.ibm.enav.model.service.impl.ServiceDefinitionImpl@176c74b
(eProxyURI: services.srv#/)
However, making any calls to this object in order to retrieve attributes
that exist in the resource to which it was persisted (xml file) do not
work. How do I force the loading of the proxy? I thought that was
supposed to be built in with the lazy loading scheme.
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| Re: Loading proxy resources [message #395967 is a reply to message #395966] |
Fri, 30 September 2005 17:46  |
| Eclipse User |
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Brian Berry wrote:
> Chris Aniszczyk wrote:
>
>> Brian Berry wrote:
>>
>>> ok, I have the objects in my model saving to seperate files. I can
>>> load the parent object from its file fine and I see that the proxy
>>> object is described as...
>>>
>>> com.ibm.enav.model.service.impl.ServiceDefinitionImpl@176c74b
>>> (eProxyURI: services.srv#/)
>>>
>>> However, making any calls to this object in order to retrieve
>>> attributes that exist in the resource to which it was persisted (xml
>>> file) do not work. How do I force the loading of the proxy? I
>>> thought that was supposed to be built in with the lazy loading scheme.
>>
>>
>>
>> ECoreUtil.resolve*
>>
>> Look at those set of methods...
>>
>> Cheers,
>>
>> ~ Chris
>
> Seems to have no effect. Here is my method for loading a file...
>
> public static EObject loadFile(String fileName) throws IOException {
> EObject result = null;
> Map options = new HashMap();
> Map map = new HashMap();
> Resource resource = null;
>
> SolutionPackageImpl.init();
> ControlPackageImpl.init();
> ServicePackageImpl.init();
>
> Resource.Factory.Registry reg = Resource.Factory.Registry.INSTANCE;
> map = reg.getExtensionToFactoryMap();
> map.put("*", new XMIResourceFactoryImpl());
> resource = new XMIResourceImpl(URI.createFileURI(fileName));
> options.put(XMIResource.OPTION_DECLARE_XML, Boolean.TRUE);
> options.put(XMIResource.OPTION_ENCODING, "UTF-8");
> resource.load(options);
> result = (EObject) resource.getContents().get(0);
>
> return result;
> }
>
>
> My test code is as follows...
>
> engagementInfo = (EngagementInfo)EmfObjectHandler.load("testme-def.enav");
>
> EcoreUtil.resolveAll(engagementInfo);
> printServiceDefinition(engagementInfo.getServiceDefinition() );
>
>
> the call to getServiceDefinition should get an EMF object that has been
> persisted to a seperate file. However, my print method returns null as
> if is not loaded properly. The rest of my EngagementInfo object seems
> fine - just the proxy references seem useless.
Like Ed said, ResourceSet is your friend if you need to resolve proxies.
Ctrl+Shift+T, ResourceSet, go!
Cheers,
~ Chris
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| Re: Loading proxy resources [message #395969 is a reply to message #395964] |
Sat, 01 October 2005 01:19 |
| Eclipse User |
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Originally posted by: bdberry.us.ibm.com
Ed Merks wrote:
> Brian,
>
> Be sure that you've set resolveProxies to true.
> I'm suspicious that your proxy's URI is not an absolute URI. This makes
> me think that you didn't create such a good URI when you saved the
> file. It's best to use an absolute URI and so when saving to the file
> system, a pattern like this works best URI.createFileURI(new
> java.io.File(filepath).getAbsolutePath()). If you use just a file name
> you are relying on the current directory being correct (and your cross
> file references won't be deresolved to be nice relative URIs).
> I also didn't see any resource set in your previous examples. Your
> resource needs to be in a resource set to be able to resolve proxies,
> since resolving a proxy requires that a resource be demand loaded into
> the containing resource set. I should have thought to mention that
> earlier. It's probably a good idea to look at the generated
> XyzExample.java in generated *.tests plugin since it shows the general
> pattern you'd normally follow to be able to use a set of interrelated
> resources.
>
>
> Brian Berry wrote:
>
>> ok, I have the objects in my model saving to seperate files. I can
>> load the parent object from its file fine and I see that the proxy
>> object is described as...
>>
>> com.ibm.enav.model.service.impl.ServiceDefinitionImpl@176c74b
>> (eProxyURI: services.srv#/)
>>
>> However, making any calls to this object in order to retrieve
>> attributes that exist in the resource to which it was persisted (xml
>> file) do not work. How do I force the loading of the proxy? I
>> thought that was supposed to be built in with the lazy loading scheme.
>
>
I changed my load and save code to use the resource set and everything
works great now - thanks. I have been using the same load/save code
since EMF v1.x and I never needed to load from seperate files so I never
discovered a different way to do it. This was very helpful.
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