Eclipse Community Forums: EMF » Creating SelectEntry for Attributes of a Class

Help

Home

Home » Modeling » EMF » Creating SelectEntry for Attributes of a Class

Show: Today's Messages :: Show Polls :: Message Navigator

Creating SelectEntry for Attributes of a Class [message #636420]

Mon, 01 November 2010 07:51

Animesh Kumar

Messages: 79
Registered: September 2010
Location: Bangalore

Member

Hi All,
I was trying to retrieve all values stored for a class using Query2. I used the following code :-

ResourceSet rs = new ResourceSetImpl();
		QueryContext queryContext = getQueryContext(rs);
		QueryProcessor queryProcessor = QueryProcessorFactory.getDefault().createQueryProcessor(IndexFactory.getInstance());
		SelectEntry select = new SelectAlias("obj");
		FromType from = new FromType(/* aliasName */"obj", /* type URI */
		eClassURI, /* withoutsubtypes */false);
		Query query = new Query(new SelectEntry[] { select }, new FromEntry[] { from });
		ResultSet resultSet = queryProcessor.execute(query, queryContext);
		return resultSet;

The above snippet represents a query:-

Search:
from eClass /* Variable */ as obj select obj

But here the SelectEntry is only for the class and not for its attributes.

I want to create a SelectEntry for the attributes. I have the attributes retrieved but i have no idea about the format to be used to use those attributes in the code. How can i create a java code like the above for a query which is something like this :-

Search:
from eClass /* Variable */ as obj select obj.attribute1, obj.attribute2

Regards,
Animesh

[Updated on: Mon, 01 November 2010 07:54]

Report message to a moderator

Re: Creating SelectEntry for Attributes of a Class [message #636425 is a reply to message #636420]

Mon, 01 November 2010 08:45

saurav sarkar

Messages: 428
Registered: July 2009

Senior Member

Hi Animesh,

You can specify attributes like this.

SelectAttrs selectMeName = new SelectAttrs("mm", new String[] { "name", "attrInt1" });
SelectEntry[] selectEntries = new SelectEntry[] { selectMeName };

Where mm is alias and the String array having all the attributes.

Check the SelectAttrs class.

Hope this helps.

cheers,
Saurav

My Blog http://codifyit.blogspot.com/
Follow me: http://twitter.com/sauravs

[Updated on: Mon, 01 November 2010 08:46]

Report message to a moderator