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| Re: Automatic Modification Tracking does not work [message #416252 is a reply to message #416249] |
Wed, 23 January 2008 15:12   |
 Ed Merks
Messages: 33133
Registered: July 2009 |
Senior Member |
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Tobias,
Comments below.
Tobias Langner wrote:
> Hey,
> I'd like to be able to display a dialog, that shows users which resources
> (ecore-files) they have modified since the last save action. To do this, I
> overrode the method createModel in EcoreEditor and added the following statement
> at the end
>
> for (Resource resource : editingDomain.getResourceSet().getResources())
> resource.setTrackingModification(true);
>
> in order to enable automatic modification tracking for all resources.
>
Resources are loaded on demand and this will set the flag only for the
already loaded resource, which might only be the first one. You might
add an adapter to the resource set that listens for resources being
added and sets this flag for any added resource.
> However, when I change something in the model (e.g. deleting an EClass in a
> package) and iterate over all resources again in doSave, none of the respective
> resources isModified().
>
Maybe there are more resources this time around?
> What is the problem with my approach? How can I find out which resources have
> been modified?
>
One thing this will miss is the fact that a resource might be changed
(at least in terms of how it's serialized) if, for example, you move a
class it references from one resource to another.
> Thanks in advance, cheers,
>
> Tobias
>
Ed Merks
Professional Support: https://www.macromodeling.com/
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| Re: Automatic Modification Tracking does not work [message #416261 is a reply to message #416260] |
Wed, 23 January 2008 19:03 |
Ed Merks
Messages: 33133
Registered: July 2009 |
Senior Member |
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This is a multi-part message in MIME format.
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Tobias,
It's very expensive to determine in a general way whether a reference to
something has changed the URI of that reference. You can look at how
ResourceImpl.saveOnlyIfChanged works. You might just save each resource
to a byte array or to a temporary file and compare the contents of that
to the read-only contents in a byte-by-byte way and use that to know
which need saving...
Tobias Langner wrote:
> Ed,
>
>
>>> I'd like to be able to display a dialog, that shows users which resources
>>> (ecore-files) they have modified since the last save action. [...]
>>>
>> Resources are loaded on demand and this will set the flag only for the
>> already loaded resource, which might only be the first one. You might
>> add an adapter to the resource set that listens for resources being
>> added and sets this flag for any added resource.
>>
> That sounds like a much better solution.
>
>
>> One thing this will miss is the fact that a resource might be changed
>> (at least in terms of how it's serialized) if, for example, you move a
>> class it references from one resource to another.
>>
> Do you see any way how I can track such modifications as well? This is very
> critical for us to know, since the resource files being edited are read-only and
> are only made writeable during saving. So it would be nice to know which files
> have been modified at all in order to present this information to the user
> before saving to let the user make the files writeable.
>
--------------050605050006030402020704
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-15"
http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Tobias,<br>
<br>
It's very expensive to determine in a general way whether a reference
to something has changed the URI of that reference.
Ed Merks
Professional Support: https://www.macromodeling.com/
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