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Only read specific data types with MWE Reader [message #1448908]

Mon, 20 October 2014 16:13

David Baum

Messages: 20
Registered: August 2014

Junior Member

Hello,

I've build my own DSL with Xtext. Now I want to read the DSL from a txt file:

component = org.eclipse.xtext.mwe.Reader {
		path = "input"
		register = org.svis.xtext.MyDSLStandaloneSetup {}
		loadResource = {
			slot = "mydsl"
		}
	}

But I'm only interesed in some parts of the DSL, so to speak in specific data types. Is there a way to "discard/reject" the unwanted parts of the read file?

Thanks in Advance!

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Re: Only read specific data types with MWE Reader [message #1448959 is a reply to message #1448908]

Mon, 20 October 2014 17:56

Christian Dietrich

Messages: 14664
Registered: July 2009

Senior Member

do you mean "read" or "process"?
cant you simply ignore the stuff you dont want?

besides the loadResource you can add a load statment which allows you to specify a type (name of eclass) to be filtered.
of course you cant use igenerator anymore.

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Only read specific data types with MWE Reader [message #1449392 is a reply to message #1448959]

Tue, 21 October 2014 09:32

David Baum

Messages: 20
Registered: August 2014

Junior Member

I have to deal with very big files. Sometimes they cause out of memory errors, so I thaught it might be helpful to discard irrelevant parts of the files.

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Re: Only read specific data types with MWE Reader [message #1449429 is a reply to message #1449392]

Tue, 21 October 2014 10:39

Christian Dietrich

Messages: 14664
Registered: July 2009

Senior Member

hi,

this wont work through the reader, if you have memory problem you should profile them and/or increase memory.
maybe a custom lexer can help to lex some parts of the model file to /dev/null respectively a whitespace token.

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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