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Question about ATL [message #988696]

Sat, 01 December 2012 13:18

Rafael Durelli

Messages: 72
Registered: September 2012

Member

Hello guys, i'm new at ATL and I'm trying to create a simple transformation that transform a SQLMODEL, which I've devised, to a KDMSQL, which correspond to a extension to the KDM to model SQL statements. However, when I have to create the Datatype I always get an exception. Please, see the code below

-- @path MM=/SQLMODEL/model/sqlmodel.ecore
-- @path MM1=/KDMSQLExtesion/model/kdmSQL.ecore

module transformation;
create OUT : MM1 from IN : MM;



rule table2TableUnit {
	from
		table : MM!Table
	to 
		tableUnit : MM1!TableUnit (
			name <- table.name,
			codeElement <- table.columns
		)
}

rule column2ColumnUnit {
	from
		column : MM!Column
	to 
		columnUnit : MM1!ColumnUnit (
			name <- column.name,
			type <- column.type //the error of Casting is happing here.
                       //type is Datatype and column.type is a String, how can I create a Datatype correctly?
		)
}

Thanks guys, please help.

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Re: Question about ATL [message #988761 is a reply to message #988696]

Mon, 03 December 2012 00:42

Rafael Durelli

Messages: 72
Registered: September 2012

Member

-- @path MM=/SQLMODEL/model/sqlmodel.ecore
-- @path MM1=/KDMSQLExtesion/model/kdmSQL.ecore

module transformation;
create OUT : MM1 from IN : MM;



rule table2TableUnit {
	from
		table : MM!Table
	to 
		tableUnit : MM1!TableUnit (
			name <- table.name,
			codeElement <- table.columns
		)
}

rule column2ColumnUnit {
	from
		column : MM!Column
	to 
		columnUnit : MM1!ColumnUnit (
			name <- column.name,
			type.name <- column.type -- Herein is the problem...
		) 
}

I have been tried make type.name (String) <- column.type (also string) but the source code don't compile. Could someone please help me on this?

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Re: Question about ATL [message #988820 is a reply to message #988696]

Mon, 03 December 2012 10:54

Rafael Durelli

Messages: 72
Registered: September 2012

Member

Hello everyone, I have done it. It was really simple. Please, see the source code below.
Thanks.

-- @path MM=/SQLMODEL/model/sqlmodel.ecore
-- @path MM1=/KDMSQLExtesion/model/kdmSQL.ecore

module transformation;
create OUT : MM1 from IN : MM;


helper def : teste : MM1!ColumnUnit = 0;

rule table2TableUnit {
	from
		table : MM!Table
	to 
		tableUnit : MM1!TableUnit (
			name <- table.name,
			codeElement <- table.columns
		)
}

rule column2ColumnUnit {
	from
		column : MM!Column 
	to 
		columnUnit : MM1!ColumnUnit (
			name <- column.name,
			type <- type
		),
		type : MM1!ColumnUnit (
		
			name <- column.type
			
		)
}

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Re: Question about ATL [message #988834 is a reply to message #988761]

Mon, 03 December 2012 11:46

Hugo Bruneliere

Messages: 674
Registered: July 2009

Senior Member

Hello,

ATL does not currently provide a full support for custom datatypes.
This limitation has been recently discussed, e.g. in http://www.eclipse.org/forums/index.php/mv/msg/440384/986641/#msg_986641

Best regards,

Hugo

--------------------------------------------------------
Hugo Bruneliere, PhD
NaoMod team (IMT Atlantique & LS2N-CNRS)
Nantes - France
--------------------------------------------------------

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