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Indexing containment references? [message #1593257]

Fri, 30 January 2015 14:13

Nils Ruhr

Messages: 9
Registered: January 2015

Junior Member

Hi,

I've noticed, that the DefaultResourceDescriptionStrategy creates IReferenceDescriptions only for non-containment references:
See isIndexable and isResolvedAndExternal methods.

Is there a reason why containment-references are not indexed by default?

I'd like to index my containment-references. Is overriding of the isIndexable and the isResolvedAndExternal methods the correct way?

Thanks.

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Re: Indexing containment references? [message #1593790 is a reply to message #1593257]

Fri, 30 January 2015 22:17

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Why do you want to have containment refs in the index. Can you elaborate on your usecase

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Indexing containment references? [message #1594492 is a reply to message #1593790]

Sat, 31 January 2015 09:47

Nils Ruhr

Messages: 9
Registered: January 2015

Junior Member

Hi.

I have a simple grammar that looks similar to this one:

Package:
'package' name=ID types+=Type;

Type :
'type' name=ID
'{' properties += Property* '}';

Property:
type=[Type|QualifiedID] name=ID;

The model would look like this

package foo
type int { }
type Person { Address address }
type Address { int code String name }

I'd like to find all properties of a particular type for a given type via the index:
In a dialog the user types in a name of a type (e.g. "Address") and the dialog lists all "int"-properties of the given type (in the example model it would be the property "code").

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Re: Indexing containment references? [message #1594509 is a reply to message #1594492]

Sat, 31 January 2015 10:04

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

i think the cleaner option would be to store the information in the userdata map of the IEObjectDescriptions of the Property.
or even simply filter the Properties by their qualifiedNames (the Types name will be the first part of the qualified name)

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Indexing containment references? [message #1594747 is a reply to message #1594509]

Sat, 31 January 2015 13:53

Nils Ruhr

Messages: 9
Registered: January 2015

Junior Member

Thank you, your solution sounds reasonable!

Here's a follow-up question:
I'm actually only interested in the int-properties (the type "int" will be shipped as a library-type). While creating descriptions for the properties in the ResourceDescriptionStrategy, am I allowed to access the "type"-reference?
I'm asking this because I've sometimes encountered some weird problems because of accessing non-containment references while creating EObjectDescriptions.

[Updated on: Sat, 31 January 2015 13:57]

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Re: Indexing containment references? [message #1594783 is a reply to message #1594747]

Sat, 31 January 2015 14:25

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

you can access it by node model only: means: the text.

neber the less you could use the reference descriptions for that

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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