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acceleo 3 - passing collection type as a parameter to a Java service problem [message #870717]

Wed, 09 May 2012 12:36

ibrahim kara

Messages: 10
Registered: May 2012

Junior Member

Hi,

I am merging a plug-in written in Acceleo 2 to the new version Acceleo 3. In the old plug-in there are several calls to some java services with collection parameters. When I try to pass a collection to a Java service, I receive errors. I would like to know if it is possible to pass a collection from a template to a Java service as a parameter?

Thanks in advance.

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Re: acceleo 3 - passing collection type as a parameter to a Java service problem [message #871487 is a reply to message #870717]

Mon, 14 May 2012 07:55

Stephane Begaudeau

Messages: 458
Registered: April 2010
Location: Nantes (France)

Senior Member

Hi,

It is indeed possible, which version of Acceleo are you using? You can grab the latest one on the Eclipse marketplace.

Regards,

Stephane Begaudeau, Obeo

--
Twitter: @sbegaudeau & @acceleo
Google+: stephane.begaudeau & acceleo
Blog: http://stephanebegaudeau.tumblr.com
Acceleo Documentation: http://docs.obeonetwork.com/acceleo

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Re: acceleo 3 - passing collection type as a parameter to a Java service problem [message #871538 is a reply to message #871487]

Mon, 14 May 2012 11:10

ibrahim kara

Messages: 10
Registered: May 2012

Junior Member

Hi, I am using the version 3.0.3. I can give you a small example in order to explain my problem better.

java code: public LinkedList<Transition> sortTransitions(ENodeList list) {
...
}
acceleo 2:
this is directly called from acceleo templates by different lists such as:

* incoming.sortTransitions()...

* outgoing[anotherTemplate(args(1).filter("State").getQualifiedDotName(args(0))).trim() != "else"].sortTransitions().nGet(0)...

* outgoing[target.filter("State")].sortTransitions()...

I am rewriting this templates in acceleo 3. What can I use as a collection type in Java in order for this to work as in the same structure ?

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Re: acceleo 3 - passing collection type as a parameter to a Java service problem [message #872073 is a reply to message #871538]

Tue, 15 May 2012 12:13

Stephane Begaudeau

Messages: 458
Registered: April 2010
Location: Nantes (France)

Senior Member

Hi,

You should use in your Java service something like "sortTransitions(List<Transition> list)" and call it from a query with a Sequence(Transition). If I recall correctly the ability to use collections as a parameter of Java services was not included in Acceleo 3.0.x, I think we have introduced it in Acceleo 3.1.0 (we've just released 3.2.1). By the way, an operation named "sortedBy" is also available so you may not need the Java service at all.

Expression: [Sequence{'aaaa', 'bb', 'ccc'}->sortedBy(s: String | s.size())/]
Result: Sequence{'bb', 'ccc', 'aaaa'}

Regards,

Stephane Begaudeau, Obeo

--
Twitter: @sbegaudeau & @acceleo
Google+: stephane.begaudeau & acceleo
Blog: http://stephanebegaudeau.tumblr.com
Acceleo Documentation: http://docs.obeonetwork.com/acceleo

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