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[EMF Compare] Access EClass name attribute through DiffElement [message #661359]

Thu, 24 March 2011 07:21

Eclipse User

Hello,

I'm trying to process a DiffOperation on an EClass in order to find out if it was the name of the EClass instance that's changed (and not some other attribute of the EClass).

Is there perhaps a better way to do it than this (is there a constant for the "name" String somehwere)?

for (DiffElement diffElement : operations) {

    if ( diffElement instanceof UpdateAttribute ) {  						
							
	 UpdateAttribute changeObject = (UpdateAttribute)diffElement;
							
	if (changeObject.getAttribute().getName() == "name" ) {
								
	    // process changeObject's left and right EClasses...
								
	}
     }
}

Re: [EMF Compare] Access EClass name attribute through DiffElement [message #661444 is a reply to message #661359]

Thu, 24 March 2011 12:56

Eclipse User

You'd be better to use XyzPackage.Literals.CLASS_NAME__FEATURE_NAME to
compare the actual EAttribute. (You can use == for comparing
EAttributes but with Strings you generally should use .equals.)

lk_muc wrote:
> Hello,
>
> I'm trying to process a DiffOperation on an EClass in order to find
> out if it was the name of the EClass instance that's changed (and not
> some other attribute of the EClass).
>
> Is there perhaps a better way to do it than this (is there a constant
> for the "name" String somehwere)?
>
>
> for (DiffElement diffElement : operations) {
>
> if ( diffElement instanceof UpdateAttribute )
> {
>
> UpdateAttribute changeObject = (UpdateAttribute)diffElement;
>
> if (changeObject.getAttribute().getName() == "name" ) {
>
> // process changeObject's left and right EClasses...
>
> }
> }
> }
>

Re: [EMF Compare] Access EClass name attribute through DiffElement [message #661852 is a reply to message #661444]

Mon, 28 March 2011 05:26

Eclipse User

Thanks Ed, that's exactly what I was looking for. I'm using the following now:

if ( changeObject.getAttribute() == EcorePackage.Literals.ENAMED_ELEMENT__NAME ) {

Also thanks for the string tip - I totally didn't register I wasn't using equals!

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