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[ATL] Help with Query and OCL [message #665740]

Fri, 15 April 2011 16:51

Thanasis Naskos

Messages: 22
Registered: March 2011

Junior Member

Hi,

I have an XML file holding parameters, called "parameters.xml":

<parameters>
        <param name="prototypePackage" value="ConcretePackage"/>
	<param name="prototypeClass" value="ConcreteClass1"/>
	<param name="prototypeClass" value="ConcreteClass2"/>
                                              ...
        <param name="prototypeClass" value="ConcreteClassN"/>
</parameters>

I want to make a Query that gets the parameters and produces a file containing the above text:

This is a list with parameters
This is a Class parameter: ConcreteClass1;
This is a Class parameter: ConcreteClass2;
                           ...
This is a  Class parameter: ConcreteClassN;
End of parameters list

I figure out how to get the parameters from the XML but i can't find how to use iteration to produce the text above.

This is the code I have written so far:

query prototypeManager = ('This is a list with parameters'+

		for (c in getConcreteClasses()) {
			'This is a Class parameter: '+c.getAttrVal('value')+';'
		}

+'End of parameters list').writeTo('prototypeTransformation/PrototypeManager.txt');

uses XMLHelpers;

helper def : getConcreteClasses() : Sequence(String) =
	XML!Element.allInstances()->select(e |
		e.name = 'param'
	)->select(e |
		e.getAttrVal('name') = 'prototypeClass');

I'm getting the following error in "for" expression:

no viable alternative at input 'for'
mismatched input '{' expecting SEMI

I'm not used to the ATL and OCL so any help would be appreciated!!

[Updated on: Fri, 15 April 2011 16:55]

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Re: [ATL] Help with Query and OCL [message #665771 is a reply to message #665740]

Fri, 15 April 2011 20:10

Thanasis Naskos

Messages: 22
Registered: March 2011

Junior Member

I'm close to a solution...

I've changed "for expression" with "collect". Now the code looks like this:

query prototypeManager = ('This is a list with parameters'+

		thisModule.getConcreteClasses()->collect(c | '\nThis is a Class parameter: '+c.getAttrVal('value')+';')

+'\nEnd of parameters list').writeTo('prototypeTransformation/PrototypeManager.txt');

uses XMLHelpers;

helper def : getConcreteClasses() : Sequence(String) =
	XML!Element.allInstances()->select(e |
		e.name = 'param'
	)->select(e |
		e.getAttrVal('name') = 'prototypeClass');

The only problem now is that I'm getting the output with brackets "[" "]"

This is a list with parameters[
This is a Class parameter: ConcreteClass1;
This is a Class parameter: ConcreteClass2;
                           ...
This is a  Class parameter: ConcreteClassN;]
End of parameters list

Is there a way to get rid of those?

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Re: [ATL] Help with Query and OCL [message #665919 is a reply to message #665740]

Mon, 18 April 2011 07:30

Sylvain EVEILLARD

Messages: 556
Registered: July 2009

Senior Member

you can use an iterate :

thisModule.getConcreteClasses()->iterate(c; res : String = 'This is a list with parameters' | res +  '\nThis is a Class parameter: '+c.getAttrVal('value')+';')+'\nEnd of parameters list').writeTo('prototypeTransformation/PrototypeManager.txt');

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Re: [ATL] Help with Query and OCL [message #665958 is a reply to message #665740]

Mon, 18 April 2011 11:23

Thanasis Naskos

Messages: 22
Registered: March 2011

Junior Member

Sylvain, THANK you very much!!

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Re: [ATL] Help with Query and OCL [message #682319 is a reply to message #665740]

Fri, 10 June 2011 20:33

No real name

Messages: 1
Registered: June 2011

Junior Member

Hello,

I have a smiliar problem like Thanasis. Unfortunatelly I am not able to solve it.

This is my XML File (shortened):

<?xml version="1.0" encoding="ISO-8859-1"?>
<MYFILE xmi:version="2.0" xmlns:xmi="http:..." xmlns:xsi="..." xmlns="...">
  <root>
     <incl name="MainItem">
		<incl name="Item1">
		</incl>
		<inclname="Item2">
		</incl>
		<incl name="Item">
		</incl>
	</incl>
  </root>
</MYFILE>

And this is what I want to produce:

<?xml version="1.0" encoding="UTF-8"?>
  <MainItem>
    <item1>
    </Item1>
	<item2>
    </Item2>
	<item3>
    </Item3>
  </MainItem>

Tried so start like Thanasis for the MainItem, but output is just "This is a list with parameters"..

query now = thisModule.getConcreteClasses()->iterate(c; res : String = 'This is a list with parameters' | res +  '\nThis is a Class parameter: '+c.getAttrVal('name')+';'+'\nEnd of parameters list').writeTo('fu.txt');


helper def : getConcreteClasses() : Sequence(String) =
	XML!Element.allInstances()->select(e |e.name = 'incl')->select(e |e.getAttrVal('name') = 'MainItem');

Sitting here since hours for a couple of transformations - Cannot find a solution to this one. Anybody can help?

[Updated on: Fri, 10 June 2011 20:49]

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Re: [ATL] Help with Query and OCL [message #682337 is a reply to message #682319]

Fri, 10 June 2011 20:48

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

Why would you think that getConcreteClasses() can return a Sequence(String)?

Regards

Ed Willink

On 10/06/2011 21:33, forums-noreply@eclipse.org wrote:
> Hello,
>
> I have a smiliar problem like Thanasis. Unfortunatelly I am not able
> to solve it.
>
> This is my XML File (shortened):
>
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <MYFILE xmi:version="2.0" xmlns:xmi="http:..." xmlns:xsi="..."
> xmlns="...">
> <root>
> <incl name="MainItem">
> <incl name="Item1">
> </incl>
> <inclname="Item2">
> </incl>
> <incl name="Item">
> </incl>
> </incl>
> </root>
> </MYFILE>
>
>
> And this is what I want to produce:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <MainItem>
> <item1>
> </Item1>
> <item2>
> </Item2>
> <item3>
> </Item3>
> </MainItem>
>
>
> Tried so start like Thanasis for the MainItem, but output is just
> "This is a list with parameters"..
>
> query now = thisModule.getConcreteClasses()->iterate(c; res : String =
> 'This is a list with parameters' | res + '\nThis is a Class
> parameter: '+c.getAttrVal('name')+';'+'\nEnd of parameters
> list').writeTo('fu.txt');
>
>
> helper def : getConcreteClasses() : Sequence(String) =
> XML!Element.allInstances()->select(e |e.name = 'incl')->select(e
> |e.getAttrVal('name') = 'MainItem');
>
>
> Sitting here since 12 hours for a couple of transformations - Cannot
> find a solution to this one. Anybody can help?

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