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Beginner grammar problem [message #692143]

Sun, 03 July 2011 13:48

Eclipse User

Hello EveryBody!
I have some problems with definition of mydsl grammar

I have several Lists<String> which are Writers, Books PageNumber, Isb respectively in my ProposalProvider class

in myDsl I will create a text line which is called NonEmptyline which consists of the lists of Writers, Books PageNumber, Isbn respectively

for example: in my DSL, each line has to be just like this

Stefen_King:Full_Dark_No_Stars:789:1234567

each element will be called from a different List by content assist. Here my code is below, when i run as .MWE2 i get errors



Librarymodel:
	(elements+=NonEmptyline)*;
	
NonEmptyline:
	Writers':' Books ':'PageNumber ':' IsbnNumber
;

Writers:
	 name=WriterName ':';
	WriterName hidden(): ID (WS ID)* ;

Books:
	name=BookName ':'
	BookName hidden (): ID (WS ID)* ;

PageNumber:
	name=Page ':'
	Page hidden (): ID (WS ID)* ;
	
	;
IsbnNumber:
	name=Isbn ':'
	Isbn hidden (): ID (WS ID)* ;

I look forward to hear your solutions

Sincerely

[Updated on: Sun, 03 July 2011 13:49] by Moderator

Re: Beginner grammar problem [message #692147 is a reply to message #692143]

Sun, 03 July 2011 13:59

Eclipse User

Hi,

there a lots of complicated stuff in your grammar. its way to complicated. what about something like

in parser rules you should always assign stuff.
each rule must be closed with a semicolon.

Librarymodel:
	(elements+=NonEmptyline)*;
	
NonEmptyline:
	writer=Words ':' book=Words ':'pageNumber=INT ':' isbn=INT
;

Words hidden (): ID (WS ID)* ;

~Christian

[Updated on: Sun, 03 July 2011 14:00] by Moderator

Re: Beginner grammar problem [message #692155 is a reply to message #692147]

Sun, 03 July 2011 14:35

Eclipse User

Thanks you so much again, this works,

I have one more question if when Stefen_King has been chosen as a writer from content assist, how can i display just Stefen_King 's books intstead of all books?

Best

Re: Beginner grammar problem [message #692157 is a reply to message #692155]

Sun, 03 July 2011 14:39

Eclipse User

Hi,

what about a filtered content assist for the books? just query the Context (downcasting EObject model to NonEmptyline andf ask it for the writer)

but what i do not understand is: if you have all the data why to do the modeling stuff at all???

~Christian

~Christian

Re: Beginner grammar problem [message #692158 is a reply to message #692157]

Sun, 03 July 2011 14:43

Eclipse User

well i have an existing language for my data, we have used this language on text file for a long time
Now we decided to have a simple editor which is capable for coloring and error checking and content assist

Re: Beginner grammar problem [message #692159 is a reply to message #692158]

Sun, 03 July 2011 14:46

Eclipse User

Hi,

just to make this clear: you have files/models for the master data as well? why don't you use a dsl for these to and use cross refs for the Librarymodel?

~Christian

Re: Beginner grammar problem [message #692160 is a reply to message #692159]

Sun, 03 July 2011 15:01

Eclipse User

Hi again
Thanks again and again for advance suggestion, this is explicitly what i need for my librarymodel, However I need to study on it Smile

Re: Beginner grammar problem [message #692391 is a reply to message #692160]

Mon, 04 July 2011 07:06

Eclipse User

hello Christian

can you give me any sample for this reference linking based on my Librarymodel ,

Re: Beginner grammar problem [message #692396 is a reply to message #692391]

Mon, 04 July 2011 07:28

Eclipse User

Hi,

since i do not know you masterdata dsl: no

~Christian

Re: Beginner grammar problem [message #692405 is a reply to message #692396]

Mon, 04 July 2011 07:47

Eclipse User

Librarymodel:
	(elements+=CrossReference)*;

CrossReference:
	referencedObjct=[NonEmpityLine];

NonEmptyline:
	writer=Words ':' book=Words ':'pageNumber=INT ':' isbn=INT
;

Words hidden (): ID (WS ID)* ;

is this right as grammar?


~ProposalProvider extends Abstract~..~ProposalProvider implements ILinkingService {
......

ArrayList<String> writers = new ArrayList<String>();
writers.add("writer1"); 
writers.add("writer2"); 
writers.add("writer3"); 

....
@Override
	public void complete_writers(EObject model, RuleCall ruleCall,
			ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		for(String writer: writers){
			acceptor.accept(createCompletionProposal(writer,context));
		}
		// TODO Auto-generated method stub
		super.complete_LogItem(model, ruleCall, context, acceptor);
	}

.....


// Actually, I dont know how to context this with writer 
@Override
	public List<EObject> getLinkedObjects(EObject context,
			EReference reference, INode node) throws IllegalNodeException {
		// TODO Auto-generated method stub
		return null;
	}

}//class end

[Updated on: Mon, 04 July 2011 08:32] by Moderator

Re: Beginner grammar problem [message #692427 is a reply to message #692405]

Mon, 04 July 2011 08:20

Eclipse User

No,

if you want to crossref something you need the something somewhere. where is that in your case? where are the "Books" master data defined?

~Christian

Re: Beginner grammar problem [message #692433 is a reply to message #692427]

Mon, 04 July 2011 08:33

Eclipse User

All i have above , in the class

some more array such as

ArrayList<String>writer1sbooks;
writer1sbooks== new ArrayList<String>();
writer1sbooks.add.....
.....

[Updated on: Mon, 04 July 2011 08:36] by Moderator

Re: Beginner grammar problem [message #692438 is a reply to message #692433]

Mon, 04 July 2011 08:41

Eclipse User

Hi,

then it is a missunderstanding that you can use references

~CVhr

Re: Beginner grammar problem [message #692440 is a reply to message #692438]

Mon, 04 July 2011 08:45

Eclipse User

Thank anyway for you help Wink