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Java Forum / First Aid / May 2008how to set a state
Hi, I am using a class called session that contains a has an internal state object. However I can only do get on the state. This is the code I need to test but since I cannot set the sate since Session is an external interface with an innner class called State. Is there a way around this for me? cheers, //mikael switch (session.getState()) { case TERMINATED: //Do something break; case EARLY: //do something break; case CONFIRMED: //do something break; case INITIAL: //do something break; } } On Thu, 15 May 2008 05:32:17 -0700 (PDT), mike <mikaelpetterson@hotmail.com> wrote, quoted or indirectly quoted someone who said : >I am using a class called session that contains a has an internal >state object. However I can only do get on the state. >This is the code I need to test but since I cannot set the sate since >Session is an external interface with an innner class called State. Is >there a way around this for me? for hints on writing state machines see http://mindprod.com/jgloss/finitestate.html The trick is to use enums that implement a next method to find the next state given the input.  SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com > Hi, > [quoted text clipped - 28 lines] > } > } In the first place, what is the point of this code fragment? You don't provide the code for Session, you don't provide the code for State, and you don't provide the code for State's enclosing class. What are we supposed to do, read your mind? Instead you provide a snippet that tells us nothing relevant to your question. We can't even tell from this or your other post on this code whether getState() returns an enum or an int. Come on, dude. <http://sscce.org/> As to your question, if Session is an "external" (what does that mean?) interface, then it cannot have any inner classes. <http://java.sun.com/docs/books/jls/third_edition/html/interfaces.html#9.5> >> Interfaces may contain member type declarations (§8.5). >> A member type declaration in an interface is implicitly static and public. <http://java.sun.com/docs/books/jls/third_edition/html/classes.html#8.5.2> >> The static keyword may modify the declaration of a member type C >> within the body of a non-inner class T. >> Its effect is to declare that C is not an inner class. <http://java.sun.com/docs/books/jls/third_edition/html/classes.html#8.1.3> >> An inner class is a nested class that is not >> explicitly or implicitly declared static. Next, what *does* set the State? It's got to come from somewhere. Where? How? Answer our questions that we may answer yours. <http://sscce.org/> SignatureLew > > Hi, > [quoted text clipped - 32 lines] > provide the code for Session, you don't provide the code for State, and you > don't provide the code for State's enclosing class. I am using a SIP API that I am not responsible for. What are we supposed to > do, read your mind? Instead you provide a snippet that tells us nothing > relevant to your question. We can't even tell from this or your other post on > this code whether getState() returns an enum or an int. Come on, dude. > <http://sscce.org/> getState returns the following: / Method descriptor #21 ()Ljavax/servlet/sip/SipSession$State; public abstract javax.servlet.sip.SipSession.State getState(); > As to your question, if Session is an "external" (what does that mean?) > interface, then it cannot have any inner classes. [quoted text clipped - 22 lines] > -- > Lew >> Next, what *does* set the State? It's got to come from somewhere. Where? How? SignatureLew > >> Next, what *does* set the State? It's got to come from somewhere. Where? How? > > -- > Lew Well there is no public method for the API so I guess that there is something handled internally in the API. cheers, //mike >>>> Next, what *does* set the State? It's got to come from somewhere. Where? How? >> -- >> Lew > > Well there is no public method for the API so I guess that there is > something handled internally in the API. So it just changes state for no reason, arbitrarily? Surely there is some external interaction that affects the state. Surely you just don't sit there waiting for it to change state by itself. I ask again, what *does* set the state? It's got to come from somewhere. Where? How? SignatureLew Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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