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How to auto create unique identifier for instances? [message #1801815]

Sun, 27 January 2019 18:57

Mars Keez

Messages: 16
Registered: January 2015

Junior Member

How can I automatically create a unique identifier while creating an instance?

Saw for example "Uid" in Sirius meta model elements. Looks perfect. But how to do this?
Also simpler approaches (timestamp etc) would be appreciated.

ps
been using a name attribute with "ID" property, but that's not enough for my purposes.

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Re: How to auto create unique identifier for instances? [message #1801825 is a reply to message #1801815]

Mon, 28 January 2019 06:24

Ed Willink

Messages: 7669
Registered: July 2009

Senior Member

Hi

How unique?

If you want to differ from anything anywhere anytime, you might use EcoreUtil.generateUUID().

But if you only want uniqueness here, then you produce something much friendlier by counting similarly scoped names and then allocating a name such as scope-name-count. But you must check for collisions and move on because deletions in this or a previous edit session may reduce counts facilitating confusing re-use.

Regards

Ed Willink

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