Issue 153: JDOQL super keyword

[Craig L Russell]

Javadogs, I've recorded this as Issue 153. I propose to defer this to a future release. Currently super is not a JDOQL keyword, so there is no way to exactly duplicate the semantics of Java super. In Java, super is used to access a field (or method, but methods are not relevant for JDOQL) that is hidden by a subclass field of the same name.  The main use of this in JDOQL would be to access a hidden field where the declaring class is not known. If the declaring class is known, then the field can be accessed by casting “this” to the declaring class in a field navigation _expression_, e.g. ((MySuperclass)this).hiddenField Craig On Jan 8, 2006, at 1:15 PM, Michael Bouschen wrote: Hi Erik, do you think we need to support super in JDOQL? You only need it if the cancdidate class hides a supeclass field and if S is the superclass you can write 'super.field' as '((S)this).field'. Regards Michael Craig, In JDOQL BNF, it's not a valid field accessor. The same for ClassName.super Current ------- FieldAccess: FieldName Primary . FieldName Regards, Erik Bengtson Quoting Craig L Russell <[EMAIL PROTECTED]>:   Hi Erik, It is not in the spec because it's already a Java keyword. Please see 14.4: Keywords Keywords must not be used as package names, class names, parameter names, or variable names in queries. Keywords are permitted as field names only if they are on the right side of the “.” in field access expressions as defined in the Java Language Specification second edition, section 15.11. Keywords include the Java language keywords and the JDOQL keywords. Java keywords are as defined in the Java language specification section 3.9, plus the boolean literals true and false, and the null literal. JDOQL keywords maybe written in all lower case or all upper case. What specifically are you interested in knowing? Regards, Craig On Jan 7, 2006, at 3:57 PM, [EMAIL PROTECTED] wrote:     Hi, Is it intentionally not in the spec? Regards, Erik Bengtson       Craig Russell Architect, Sun Java Enterprise System http://java.sun.com/products/jdo 408 276-5638 mailto:[EMAIL PROTECTED] P.S. A good JDO? O, Gasp!       --  Michael Bouschen [EMAIL PROTECTED] Engineering GmbH mailto:[EMAIL PROTECTED] http://www.tech.spree.de/ Tel.:++49/30/235 520-33 Buelowstr. 66 Fax.:++49/30/2175 2012 D-10783 Berlin Craig Russell Architect, Sun Java Enterprise System http://java.sun.com/products/jdo 408 276-5638 mailto:[EMAIL PROTECTED] P.S. A good JDO? O, Gasp!

smime.p7s
Description: S/MIME cryptographic signature