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how to make an element undeletable [message #538534]

Mon, 07 June 2010 21:38

bachra04

Messages: 148
Registered: April 2010

Senior Member

For some reasons I want to make one element non deletable once created,
Is there a way to do that ?

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Re: how to make an element undeletable [message #538545 is a reply to message #538534]

Mon, 07 June 2010 22:17

Axel Guckelsberger

Messages: 354
Registered: July 2009

Senior Member

Hi,

you can try to override the getDestroyElementCommand() method of the
ItemSemanticEditPolicy of the corresponding node edit parts.

protected Command getDestroyElementCommand(DestroyElementRequest req) {
return UnexecutableCommand.INSTANCE;
}

For links use getDestroyReferenceCommand() accordingly. Note that this
includes that the parent edit part can not be deleted, too.

Maybe you need to additionally install another policy to prevent deletion by
the del key also:
installEditPolicy(EditPolicy.COMPONENT_ROLE, new ComponentEditPolicy() {
protected Command getDeleteCommand(GroupRequest request) {
return null;
}
});

HTH
Axel

bachra04 wrote:

> For some reasons I want to make one element non deletable once created,
> Is there a way to do that ?

Report message to a moderator

Re: how to make an element undeletable [message #538856 is a reply to message #538545]

Tue, 08 June 2010 19:44

bachra04

Messages: 148
Registered: April 2010

Senior Member

I tried but I had the following compile error:

Type mismatch: cannot convert from UnexecutableCommand to Command
even casting does not work.

Any idea ?

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