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Copying contained objects [message #997433]

Mon, 07 January 2013 13:43

Greg Babcock

Messages: 41
Registered: October 2012

Member

My application makes a copy of a contained object for editing, and then replaces the original on save. ECoreUtil.copy reassigns the containment reference to the copy, is there an easy way to made a copy of a contained object without modifying the original?

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Re: Copying contained objects [message #997456 is a reply to message #997433]

Mon, 07 January 2013 15:43

Christophe Bouhier

Messages: 937
Registered: July 2009

Senior Member

Yes, you should customize the copy method in ECoreUtil. You see the copying of references can be isolated see the code:

public static <T extends EObject> T copy(T eObject)
{
Copier copier = new Copier();
EObject result = copier.copy(eObject);
copier.copyReferences();

@SuppressWarnings("unchecked")T t = (T)result;
return t;
}

also see Javadoc for the Copier class:

* The copier delegates to {@link #copyContainment copyContainment}, {@link #copyAttribute copyAttribute} during the copy phase
* and to {@link #copyReference copyReference}, during the cross reference phase.
* This allows tailored handling through derivation.

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Re: Copying contained objects [message #997655 is a reply to message #997433]

Mon, 07 January 2013 15:49

Ed Merks

Messages: 33142
Registered: July 2009

Senior Member

Greg,

Comments below.

On 07/01/2013 2:43 PM, Greg Babcock wrote:
> My application makes a copy of a contained object for editing, and
> then replaces the original on save. ECoreUtil.copy reassigns the
> containment reference to the copy,
This sounds like a false statement...
> is there an easy way to made a copy of a contained object without
> modifying the original?
Copying never modifies the original...

As Christophe suggested, you can specialized EcoreUtil.Copier, but I'm
concerned that your assertion above appear false...

Ed Merks
Professional Support: https://www.macromodeling.com/

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