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Get all object with specific value [message #727011]

Tue, 20 September 2011 07:55

Ricky de Klerck

Messages: 295
Registered: January 2011

Senior Member

Hi,

I guess it's a simple question, but I can't find the answer...

I have a Resource with objects of type A. These objects have a reference to object B. How can I retrieve all objects in the resource with a specific object B. So three objects have a reference to object B with id=1. I want to retrieve those three objects..

It needs to be a ObservableList, so I can set it as an input of my tableviewer..

Thanks in advance.

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Re: Get all object with specific value [message #727085 is a reply to message #727011]

Tue, 20 September 2011 11:23

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

Ricky,

EcoreUtil.UsageCrossReferencer can be used for something like this. Or
you can use Resource.getAllContents() to iterate over all objects in the
resource, determine which ones are instances of A, and then determine
which of those reference the particular B of interest. I'm not sure
how to turn the result into an observable list.

On 20/09/2011 3:55 AM, Ricky de Klerck wrote:
> Hi,
>
> I guess it's a simple question, but I can't find the answer...
>
> I have a Resource with objects of type A. These objects have a
> reference to object B. How can I retrieve all objects in the resource
> with a specific object B. So three objects have a reference to object
> B with id=1. I want to retrieve those three objects..
>
> It needs to be a ObservableList, so I can set it as an input of my
> tableviewer..
>
> Thanks in advance.

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

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Re: Get all object with specific value [message #727087 is a reply to message #727085]

Tue, 20 September 2011 11:29

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Using a ComputedList but an important fact is that you need to observe
all elements because you need to recalculate the value once the
reference of an object changes!

Tom

Am 20.09.11 13:23, schrieb Ed Merks:
> Ricky,
>
> EcoreUtil.UsageCrossReferencer can be used for something like this. Or
> you can use Resource.getAllContents() to iterate over all objects in the
> resource, determine which ones are instances of A, and then determine
> which of those reference the particular B of interest. I'm not sure
> how to turn the result into an observable list.
>
>
>
> On 20/09/2011 3:55 AM, Ricky de Klerck wrote:
>> Hi,
>>
>> I guess it's a simple question, but I can't find the answer...
>>
>> I have a Resource with objects of type A. These objects have a
>> reference to object B. How can I retrieve all objects in the resource
>> with a specific object B. So three objects have a reference to object
>> B with id=1. I want to retrieve those three objects..
>>
>> It needs to be a ObservableList, so I can set it as an input of my
>> tableviewer..
>>
>> Thanks in advance.

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