M2DOC - get unit from a datatype

Capella
1

Hi,
I try to extract with M2DOC information from data package.
I used the LA template from IFE M2DOC example.
On my model, when I use the AQL command into the interpreter:
I get the answer “m/s”
But when I try to get it via M2DOC
I had the following error :
Speed is a physical quantity expressed in Invalid query statement: Feature unit not found in EClass DataType

2

Hi,
The problem arise on this expression {m:data.unit}, there is no feature unit. You can use the interpreter and completion (CTRL+SPACE) to see what features are available. Or you can try just {m:data} it should print the string representation of the object and list feature name a value pairs.
regards,
Yvan Lussaud.

3

Thank you Yvan…
The problem is that M2Doc does not understand your test and consider that data can be any kind of dataType element.
You need to adapt a little bit your code to make sure that data is only of kind PhysicalQuantity.
Can you try:
{m:for data | package.ownedDataTypes}
{m:if data->filter(datatype::PhysicalQuantity)->size() > 0}
{m:data.name} is a physical quantity expressed in {m:data->filter(datatype::PhysicalQuantity).unit.name}
{m:endif}
{m:endfor}

4

Thank you Aurélien ! It works !
In fact I found that test to isolate physical quantity into the datatype list. I can split them into several for loop (one for physical quantity, one for enumerate and so on…) with a specific filter. But if you have a tips to get the class of an object…
Thank you again

5

To let M2Doc (underlying AQL) infers the type by itself you can try:
{m:for data | package.ownedDataTypes}
{m:if data.oclIsKindOf(datatype::PhysicalQuantity)}
{m:data.name} is a physical quantity expressed in {m:data.unit.name}
{m:endif}
{m:endfor}
An if you want to only iterate over datatype::PhysicalQuantity you can use:
{m:for data | package.ownedDataTypes->filter(datatype::PhysicalQuantity)}
{m:data.name} is a physical quantity expressed in {m:data.unit.name}
{m:endfor}
The type should also be inferred in this case.
To get the class of an object you can use {m:data.eClass().name}
regards,
Yvan Lussaud.

6

Thank you for your reply