BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Italicized method names in JBuilder          BorlandTalk.com Forum Index -> JBuilder IDE View previous topic :: View next topic   Author Message Mark Guest Posted: Sat Apr 24, 2004 9:14 pm    Post subject: Italicized method names in JBuilder I have a ClassB that subclasses ClassA. ClassC has a reference to ClassB. Using JBuilder MemberInsight in ClassC, the reference to ClassB shows only the methods in ClassB but not those inherited from ClassA (the ones I wish to use in this instance). Is this normal? From past experience I thought that superclass members are available through extension and thus should be also visible in MemberInsight. In class A, JBuilder has italicized the method names. I have a feeling that this might have something to do with the problem above but I don't know what italicized method names represent. What does this signify? Thanks for your help. Mark Back to top Shankar Unni Guest Posted: Sun Apr 25, 2004 5:19 pm    Post subject: Re: Italicized method names in JBuilder Please do not cross-post. Post in only one newsgroup - pick whatever is the most appropriate one. Restricting followups to b.p.j.ide. Mark wrote: Quote: Using JBuilder MemberInsight in ClassC, the reference to ClassB shows only the methods in ClassB but not those inherited from ClassA (the ones I wish to use in this instance). Is this normal? No. I think you'll have to show a more concrete example than just A, B and C. Quote: In class A, JBuilder has italicized the method names. This means that those methods themselves override or implement some parent class or interface. I think you'll be best off posting a *SMALL* example of class A, B and C. Try to restrict the definitions to one member for each class, that show this problem, with empty bodies, etc. (just to show the structure of your classes). Back to top Mark Guest Posted: Sun Apr 25, 2004 8:55 pm    Post subject: Re: Italicized method names in JBuilder "Shankar Unni" <shankarunni (AT) netscape (DOT) net> wrote Quote: Please do not cross-post. Post in only one newsgroup - pick whatever is the most appropriate one. Restricting followups to b.p.j.ide. Sorry Quote: Mark wrote: Using JBuilder MemberInsight in ClassC, the reference to ClassB shows only the methods in ClassB but not those inherited from ClassA (the ones I wish to use in this instance). Is this normal? No. I think you'll have to show a more concrete example than just A, B and C. In class A, JBuilder has italicized the method names. This means that those methods themselves override or implement some parent class or interface. Thanks Quote: I think you'll be best off posting a *SMALL* example of class A, B and C. Try to restrict the definitions to one member for each class, that show this problem, with empty bodies, etc. (just to show the structure of your classes). My classes are exceptions and quite small so I posted them fully: ----------------------- public class MemberException extends Exception { private String memberID; // required for all MemberException subclasses public MemberException(String memberID, Throwable cause) { super(cause); this.memberID = memberID; } public String getMemberID() { return memberID; } } ---------------------------- public class MemberRegistrationException extends MemberException { // no extra data required yet in this exception so just call superclass constructor public MemberRegistrationException( String memberID, Throwable cause ) { super(memberID, cause); } } ---------------------------- public class MemberRegistrationSQLException extends MemberRegistrationException { // this type of exception should have access to SQLException data and inherited superclass data SQLException cause; int errorCode; String SQLState; public MemberRegistrationSQLException( String memberID, SQLException cause ) { super(memberID, cause); } public int getErrorCode() { errorCode = cause.getErrorCode(); return errorCode; } public String getSQLState() { SQLState = cause.getSQLState(); return SQLState; } ------------------------------------------------------ The idea being that my data access object should throw a MemberRegistrationSQLException up from my data access layer to the controller layer of my Struts-based web application which I want to be able to access all the methods and data of the MemberRegistrationSQLException subclass and its superclasses i.e. MemberRegistrationSQLException, MemberRegistrationException, MemberException (if/when defined) and so on up the inheritance chain. JBuilder's MemberInsight is only showing the methods available in MemberRegistrationSQLException but not the superclasses. I want to be able to do the following: try { int registerMemberResult = registrar.registerMember( member ); } catch ( MemberRegistrationSQLException mrsqle ) { servlet.log( "An error occurred while registering: "+member.getMemberID(), mrsqle.getCause() ); } but getCause() does not appear to be available, nor any other methods, although should they not be inherited from Throwable via inheritance? I'm just learning about exceptions, chaining exceptions etc. so I may be confusing the concepts slightly. Thanks Mark Back to top Shankar Unni Guest Posted: Mon Apr 26, 2004 4:33 pm    Post subject: Re: Italicized method names in JBuilder Mark wrote: Quote: I want to be able to access all the methods and data of the MemberRegistrationSQLException subclass and its superclasses i.e. MemberRegistrationSQLException, MemberRegistrationException, MemberException (if/when defined) I'm afraid you can't do that. SQLState, vendorCode and next are *private* in SQLException, and cannot be touched even by derived classes. This has nothing to do with JBuilder per se - it'll only show you members to which your class (the class of the object you're invoking memberInsight on) actually has access. Back to top Mark Guest Posted: Mon Apr 26, 2004 6:38 pm    Post subject: Re: Italicized method names in JBuilder "Shankar Unni" <shankarunni (AT) netscape (DOT) net> wrote Quote: Mark wrote: I want to be able to access all the methods and data of the MemberRegistrationSQLException subclass and its superclasses i.e. MemberRegistrationSQLException, MemberRegistrationException, MemberException (if/when defined) I'm afraid you can't do that. SQLState, vendorCode and next are *private* in SQLException, and cannot be touched even by derived classes. I suppose I should have been clearer given that I want to access the variablesin the class hierarchy via the public getter methods. I can't see any reason in the code why these public methods should not be inherited and available in my subclass. Quote: This has nothing to do with JBuilder per se - it'll only show you members to which your class (the class of the object you're invoking memberInsight on) actually has access. I know this thread has moved on from the matter of the JBuilder IDE to practical Java programming so I posted a question in comp.lang.java.programmer under the title "Creating / chaining exceptions and inheriting from their superclasses" . As I have received no responses from there yet so, at the moment, you arre the only one who has offered an answer :0). Please feel free to follow up in the other newsgroup if you wish to. Thanks Mark Back to top Mark Guest Posted: Mon Apr 26, 2004 7:27 pm    Post subject: Re: Italicized method names in JBuilder "Mark" <fake (AT) reallyisfake (DOT) com> wrote Quote: "Shankar Unni" <shankarunni (AT) netscape (DOT) net> wrote in message news:408d39ed$1 (AT) newsgroups (DOT) borland.com... Mark wrote: I want to be able to access all the methods and data of the MemberRegistrationSQLException subclass and its superclasses i.e. MemberRegistrationSQLException, MemberRegistrationException, MemberException (if/when defined) I'm afraid you can't do that. SQLState, vendorCode and next are *private* in SQLException, and cannot be touched even by derived classes. I suppose I should have been clearer given that I want to access the variablesin the class hierarchy via the public getter methods. I can't see any reason in the code why these public methods should not be inherited and available in my subclass. This has nothing to do with JBuilder per se - it'll only show you members to which your class (the class of the object you're invoking memberInsight on) actually has access. I know this thread has moved on from the matter of the JBuilder IDE to practical Java programming so I posted a question in comp.lang.java.programmer under the title "Creating / chaining exceptions and inheriting from their superclasses" . As I have received no responses from there yet so, at the moment, you arre the only one who has offered an answer :0). Please feel free to follow up in the other newsgroup if you wish to. An interesting development has occurred which has possibly returned the topic of this thread back to the JBuilder IDE. My program is a web application in two parts (represented by two JBuilder projects). One project represents the model layer (responsible for accessing data sources) which will end up as a jar library in the web app, the second project represents the (Struts-based) view/controller layer. Previously, I was throwing my exception up from the model layer project to the view/controller layer project (they both "see" each other as they are configured in JBuilder as "required libraries" of each other). I decided to implement some JUnit tests in the model layer as I felt that this would be an easier way to debug the exceptions. However, when I use MemberRegistrationSQLException in the model layer project I *do* have access to all the methods in the class hierarchy! So it seems that when I throw my exception up to a class in the view/controller layer (a different JBuilder project) I lose access to the API of my superclasses and can only access the methods in the subclass itself! This is not good because I want to use the class in my controller layer to log all the exception data in a servlet log file which I can only do from the controller layer I have no idea what produces this effect, it may or may not be the IDE for all I know. If in some way you can assure me it is not the JBuilder IDE I can try some other forums for an answer (unless you have an answer of course!) ;0) Thanks, Mark Back to top Shankar Unni Guest Posted: Tue Apr 27, 2004 10:10 pm    Post subject: Re: Italicized method names in JBuilder Mark wrote: Quote: So it seems that when I throw my exception up to a class in the view/controller layer (a different JBuilder project) I lose access to the API of my superclasses and can only access the methods in the subclass itself! This doesn't strike any chords in me.. I've never had any trouble of this sort - if a class has publicly visible members (even inherited), I've always been able to see them. package-protected access shouldn't be a factor here (the only thing that can affect visibility like this). I wonder if anyone else has seen anything like this. Back to top Gillmer J. Derge (TeamB) Guest Posted: Tue Apr 27, 2004 10:43 pm    Post subject: Re: Italicized method names in JBuilder Shankar Unni wrote: Quote: I wonder if anyone else has seen anything like this. I tried entering the sample code that was posted earlier. I wasn't able to reproduce the problem. I invoked Insight on an instance of MemberRegistrationSQLException, and the getCause method appeared in the list. I wonder if perhaps there's an older version of some of these classes on the classpath, and JBuilder is finding those instead of the ones you think it should be finding. How is your project set up? Do you have multiple source paths? Does it include any libraries? What happens if you use ClassInsight (Ctrl-Minus) to jump to the MemberRegistrationSQLException class? What path is shown in the title bar? Is it the one you expect? -- Gillmer J. 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