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JESS: how to store and fetch between java & jess
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JESS: how to store and fetch between java & jess
by Weijing Bai
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hi, everyone
I have a problem .
It works well when store a param in jess and fetch it in java, but it reports a error when store in java and fetch it in jess. the error is :" cannot find m" and so on.
who has once use "store-fetch " sucessfully, please give me some suggestions.
Is there any other way can pass a value from java to jess?
thank very much.
Esther Bai
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Re: JESS: how to store and fetch between java & jess
by Ernest Friedman-Hill
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I think if you just show us the actual code that caused the error, and
more details about the error -- i.e., is this a runtime or compile- time error, from Java or from Jess, and include a stack trace -- I'm sure we can help you fix it. Please cut and paste the real code, and the real stack trace -- summaries and remembered bits and piece are normally not that helpful. On Nov 5, 2009, at 1:29 AM, Weijing Bai wrote: > hi, everyone > > I have a problem . > > It works well when store a param in jess and fetch it in java, but > it reports a error when store in java and fetch it in jess. the > error is :" cannot find m" and so on. > > who has once use "store-fetch " sucessfully, please give me some > suggestions. > > Is there any other way can pass a value from java to jess? > > thank very much. > > > Esther Bai --------------------------------------------------------- Ernest Friedman-Hill Informatics & Decision Sciences, Sandia National Laboratories PO Box 969, MS 9012, Livermore, CA 94550 http://www.jessrules.com -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users you@...' in the BODY of a message to majordomo@..., NOT to the list (use your own address!) List problems? Notify owner-jess-users@.... -------------------------------------------------------------------- |
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Re: JESS: how to store and fetch between java & jess
by Weijing Bai
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oh，Thanks for your advice.
my java code: Rete engine = new Rete(); engine.store("m", 7); engine.store("n", 5); the jess clp: " module2.txt" (defglobal ?*m* = (fetch m )) (defglobal ?*n* = (fetch n )) (printout t"?m = " ?*m* crlf) (printout t"?n = " ?*n* crlf) (bind ?I (div ?*m* 2 )) (bind ?J (+ ?*m* ?*n* 2 )) (bind ?J'(+ (div (+ ?*m* 1) 2) 1)) (bind ?K (+ ?*m* 2 )) (bind ?L (+ (div (- ?*m* 3) 2) 3)) the error message: ?m = nil ?n = nil Exception in thread "main" Jess reported an error in routine Value.intValue while executing (div ?*m* 2) while executing (bind ?I (div ?*m* 2)) while executing (batch D:Jess71p1\module2.txt) Message: 'nil' is a symbol, not an integer. what's more, I once want use this in my java code, it did not work also: java code: Rete engine = new Rete(); engine.eval("(defglobal ?*m* = 7)"); engine.eval("(defglobal ?*n* = 5)"); "module2.txt": (printout t"?m = " ?*m* crlf) (printout t"?n = " ?*n* crlf) reports error: while executing (printout t "?m = " ?*m* crlf) while executing (batch D:\module2.txt) Message: No such variable *m*. On Thu, Nov 5, 2009 at 9:19 PM, Ernest Friedman-Hill <ejfried@...>wrote: > I think if you just show us the actual code that caused the error, and more > details about the error -- i.e., is this a runtime or compile-time error, > from Java or from Jess, and include a stack trace -- I'm sure we can help > you fix it. Please cut and paste the real code, and the real stack trace -- > summaries and remembered bits and piece are normally not that helpful. > > > On Nov 5, 2009, at 1:29 AM, Weijing Bai wrote: > > hi, everyone >> >> I have a problem . >> >> It works well when store a param in jess and fetch it in java, but it >> reports a error when store in java and fetch it in jess. the error is :" >> cannot find m" and so on. >> >> who has once use "store-fetch " sucessfully, please give me some >> suggestions. >> >> Is there any other way can pass a value from java to jess? >> >> thank very much. >> >> >> Esther Bai >> > > --------------------------------------------------------- > Ernest Friedman-Hill > Informatics & Decision Sciences, Sandia National Laboratories > PO Box 969, MS 9012, Livermore, CA 94550 > http://www.jessrules.com > > > > > > > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users you@...' > in the BODY of a message to majordomo@..., NOT to the list > (use your own address!) List problems? Notify owner-jess-users@... |
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Re: JESS: how to store and fetch between java & jess
by Ernest Friedman-Hill
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You don't show the connection between the Java calls to "store()" and
where Jess reads the module2.txt file. Are you sure it's the same instance of jess.Rete that's involved in both? In other words, where and how is "batch module2.txt" being invoked? Each Rete object will have its own independent storage map. If it is the same Rete object, then perhaps there's a call to "clear" somewhere in between the store and fetch? On Nov 5, 2009, at 8:47 AM, Weijing Bai wrote: > oh，Thanks for your advice. > > > my java code: > > Rete engine = new Rete(); > engine.store("m", 7); > engine.store("n", 5); > > the jess clp: > " module2.txt" > > (defglobal ?*m* = (fetch m )) > (defglobal ?*n* = (fetch n )) > > (printout t"?m = " ?*m* crlf) > (printout t"?n = " ?*n* crlf) > > (bind ?I (div ?*m* 2 )) > (bind ?J (+ ?*m* ?*n* 2 )) > (bind ?J'(+ (div (+ ?*m* 1) 2) 1)) > (bind ?K (+ ?*m* 2 )) > (bind ?L (+ (div (- ?*m* 3) 2) 3)) > > > the error message: > > ?m = nil > ?n = nil > Exception in thread "main" Jess reported an error in routine > Value.intValue > while executing (div ?*m* 2) > while executing (bind ?I (div ?*m* 2)) > while executing (batch D:Jess71p1\module2.txt) > Message: 'nil' is a symbol, not an integer. > > > what's more, I once want use this in my java code, it did not work > also: > java code: > > Rete engine = new Rete(); > > engine.eval("(defglobal ?*m* = 7)"); > engine.eval("(defglobal ?*n* = 5)"); > > "module2.txt": > > (printout t"?m = " ?*m* crlf) > (printout t"?n = " ?*n* crlf) > > reports error: > while executing (printout t "?m = " ?*m* crlf) > while executing (batch D:\module2.txt) > Message: No such variable *m*. > > > > > > > > On Thu, Nov 5, 2009 at 9:19 PM, Ernest Friedman-Hill <ejfried@... > >wrote: > >> I think if you just show us the actual code that caused the error, >> and more >> details about the error -- i.e., is this a runtime or compile-time >> error, >> from Java or from Jess, and include a stack trace -- I'm sure we >> can help >> you fix it. Please cut and paste the real code, and the real stack >> trace -- >> summaries and remembered bits and piece are normally not that >> helpful. >> >> >> On Nov 5, 2009, at 1:29 AM, Weijing Bai wrote: >> >> hi, everyone >>> >>> I have a problem . >>> >>> It works well when store a param in jess and fetch it in java, >>> but it >>> reports a error when store in java and fetch it in jess. the error >>> is :" >>> cannot find m" and so on. >>> >>> who has once use "store-fetch " sucessfully, please give me some >>> suggestions. >>> >>> Is there any other way can pass a value from java to jess? >>> >>> thank very much. >>> >>> >>> Esther Bai >>> >> >> --------------------------------------------------------- >> Ernest Friedman-Hill >> Informatics & Decision Sciences, Sandia National Laboratories >> PO Box 969, MS 9012, Livermore, CA 94550 >> http://www.jessrules.com >> >> >> >> >> >> >> >> -------------------------------------------------------------------- >> To unsubscribe, send the words 'unsubscribe jess-users you@... >> ' >> in the BODY of a message to majordomo@..., NOT to the list >> (use your own address!) List problems? Notify owner-jess-users@... --------------------------------------------------------- Ernest Friedman-Hill Informatics & Decision Sciences Phone: (925) 294-2154 Sandia National Labs PO Box 969, MS 9012 ejfried@... Livermore, CA 94550 http://www.jessrules.com -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users you@...' in the BODY of a message to majordomo@..., NOT to the list (use your own address!) List problems? Notify owner-jess-users@.... -------------------------------------------------------------------- |
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Re: JESS: how to store and fetch between java & jess
by Weijing Bai
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Ernest Friedman-Hill:
Thanks very much, there is a call to "clear " between the store and fetch. the engine.eval("(defglobal ?*m* = 7)"); engine.eval("(defglobal ?*n* = 5)"); can work well now. But the first situation can not work also, I donot know how to change a Java-Object:java.lang.Integer to integer in a jess text. now it's report error is : ?m = <Java-Object:java.lang.Integer> ?n = <Java-Object:java.lang.Integer> Exception in thread "main" Jess reported an error in routine Value.intValue while executing (div ?*m* 2) while executing (bind ?I (div ?*m* 2)) while executing (batch D:module2.txt) Message: '<Java-Object:java.lang.Integer>' is JAVA_OBJECT, not an integer. thanks a lot! On Thu, Nov 5, 2009 at 10:08 PM, Ernest Friedman-Hill <ejfried@...>wrote: > You don't show the connection between the Java calls to "store()" and where > Jess reads the module2.txt file. Are you sure it's the same instance of > jess.Rete that's involved in both? In other words, where and how is "batch > module2.txt" being invoked? Each Rete object will have its own independent > storage map. > > If it is the same Rete object, then perhaps there's a call to "clear" > somewhere in between the store and fetch? > > > > > On Nov 5, 2009, at 8:47 AM, Weijing Bai wrote: > > oh，Thanks for your advice. >> >> >> my java code: >> >> Rete engine = new Rete(); >> engine.store("m", 7); >> engine.store("n", 5); >> >> the jess clp: >> " module2.txt" >> >> (defglobal ?*m* = (fetch m )) >> (defglobal ?*n* = (fetch n )) >> >> (printout t"?m = " ?*m* crlf) >> (printout t"?n = " ?*n* crlf) >> >> (bind ?I (div ?*m* 2 )) >> (bind ?J (+ ?*m* ?*n* 2 )) >> (bind ?J'(+ (div (+ ?*m* 1) 2) 1)) >> (bind ?K (+ ?*m* 2 )) >> (bind ?L (+ (div (- ?*m* 3) 2) 3)) >> >> >> the error message: >> >> ?m = nil >> ?n = nil >> Exception in thread "main" Jess reported an error in routine >> Value.intValue >> while executing (div ?*m* 2) >> while executing (bind ?I (div ?*m* 2)) >> while executing (batch D:Jess71p1\module2.txt) >> Message: 'nil' is a symbol, not an integer. >> >> >> what's more, I once want use this in my java code, it did not work also: >> java code: >> >> Rete engine = new Rete(); >> >> engine.eval("(defglobal ?*m* = 7)"); >> engine.eval("(defglobal ?*n* = 5)"); >> >> "module2.txt": >> >> (printout t"?m = " ?*m* crlf) >> (printout t"?n = " ?*n* crlf) >> >> reports error: >> while executing (printout t "?m = " ?*m* crlf) >> while executing (batch D:\module2.txt) >> Message: No such variable *m*. >> >> >> >> >> >> >> >> On Thu, Nov 5, 2009 at 9:19 PM, Ernest Friedman-Hill <ejfried@... >> >wrote: >> >> I think if you just show us the actual code that caused the error, and >>> more >>> details about the error -- i.e., is this a runtime or compile-time error, >>> from Java or from Jess, and include a stack trace -- I'm sure we can help >>> you fix it. Please cut and paste the real code, and the real stack trace >>> -- >>> summaries and remembered bits and piece are normally not that helpful. >>> >>> >>> On Nov 5, 2009, at 1:29 AM, Weijing Bai wrote: >>> >>> hi, everyone >>> >>>> >>>> I have a problem . >>>> >>>> It works well when store a param in jess and fetch it in java, but it >>>> reports a error when store in java and fetch it in jess. the error is :" >>>> cannot find m" and so on. >>>> >>>> who has once use "store-fetch " sucessfully, please give me some >>>> suggestions. >>>> >>>> Is there any other way can pass a value from java to jess? >>>> >>>> thank very much. >>>> >>>> >>>> Esther Bai >>>> >>>> >>> --------------------------------------------------------- >>> Ernest Friedman-Hill >>> Informatics & Decision Sciences, Sandia National Laboratories >>> PO Box 969, MS 9012, Livermore, CA 94550 >>> http://www.jessrules.com >>> >>> >>> >>> >>> >>> >>> >>> -------------------------------------------------------------------- >>> To unsubscribe, send the words 'unsubscribe jess-users you@...' >>> in the BODY of a message to majordomo@..., NOT to the list >>> (use your own address!) List problems? Notify >>> owner-jess-users@... >>> >> > --------------------------------------------------------- > Ernest Friedman-Hill > Informatics & Decision Sciences Phone: (925) 294-2154 > Sandia National Labs > PO Box 969, MS 9012 ejfried@... > > Livermore, CA 94550 http://www.jessrules.com > > > > > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users you@...' > in the BODY of a message to majordomo@..., NOT to the list > (use your own address!) List problems? Notify owner-jess-users@... |
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Re: JESS: how to store and fetch between java & jess
by Wolfgang Laun-2
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What is stored under the keys "m" and "n" is a java.lang.Integer object. There's no problem with *fetching* this from Jess, but it's evaluation in a Jess expression - even after being stored in a defglobal or plain variable - is quite another matter.
I think looking at the Jess code below will show you what I mean. (jv = Jess Value, jo = Java Object) (clear) ((engine) store jv (new jess.Value 7 4)) ((engine) store jo (new Integer 7 )) (bind ?value ((engine) fetch jv)) (printout t "value=" ?value crlf) Jess> value=7 (bind ?value ((engine) fetch jo)) (printout t "value=" ?value crlf) Jess> value=<Java-Object:java.lang.Integer> (defglobal ?*m* = (fetch jv )) (printout t "global ?*m*=" ?*m* crlf) Jess> global ?*m*=7 (defglobal ?*n* = (fetch jo )) (printout t "global ?*n*=" ?*n* crlf) Jess> global ?*n*=<Java-Object:java.lang.Integer> Cheers -W On Thu, Nov 5, 2009 at 2:47 PM, Weijing Bai <estherbaiweijing@...> wrote: oh，Thanks for your advice. |
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Re: JESS: how to store and fetch between java & jess
by Jason Morris
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Hey Ernest,
Assuming that Weijing resolves the Rete instance disconnect, won't he still will have a problem because he's trying to compute with the fetched Integer object and not its int value? Here's how I massaged his code: ; a.clp ; ====== ; Note: this file has parsing errors because it lacks a Rete object reference. ; However, this script is called by the attached driver class, so it works. (defglobal ?*m* = ((fetch m) intValue)) (defglobal ?*n* = ((fetch n) intValue)) (printout t"?m = " ?*m* crlf) ; checking m value (printout t"?n = " ?*n* crlf) ; checking n value (bind ?I (div ?*m* 2 ))(printout t "?I = " ?I crlf) (bind ?J (+ ?*m* ?*n* 2 ))(printout t "?J = " ?I crlf) (bind ?J'(+ (div (+ ?*m* 1) 2) 1))(printout t "?J' = " ?J' crlf) (bind ?K (+ ?*m* 2 ))(printout t "?K = " ?K crlf) (bind ?L (+ (div (- ?*m* 3) 2) 3))(printout t "?L = " ?L crlf) then I wrote a simple driver to replace his missing code... import jess.JessException; import jess.Rete; public class StoreProblemDriver { public static void main(String[] args) { Rete engine = new Rete(); engine.store("m", 7); engine.store("n", 5); try { engine.batch("clp/a.clp"); } catch (JessException e) { e.printStackTrace(); } } } which produced the output... ; OUTPUT ;======== ;?m = 7 ;?n = 5 ;?I = 3 ;?J = 3 ;?J' = 5 ;?K = 9 ;?L = 5 Weijing: Is this what you wanted? Cheers, Jason On Thu, Nov 5, 2009 at 9:08 AM, Ernest Friedman-Hill <ejfried@...>wrote: > You don't show the connection between the Java calls to "store()" and where > Jess reads the module2.txt file. Are you sure it's the same instance of > jess.Rete that's involved in both? In other words, where and how is "batch > module2.txt" being invoked? Each Rete object will have its own independent > storage map. > > If it is the same Rete object, then perhaps there's a call to "clear" > somewhere in between the store and fetch? > > > > > On Nov 5, 2009, at 8:47 AM, Weijing Bai wrote: > > oh，Thanks for your advice. >> >> >> my java code: >> >> Rete engine = new Rete(); >> engine.store("m", 7); >> engine.store("n", 5); >> >> the jess clp: >> " module2.txt" >> >> (defglobal ?*m* = (fetch m )) >> (defglobal ?*n* = (fetch n )) >> >> (printout t"?m = " ?*m* crlf) >> (printout t"?n = " ?*n* crlf) >> >> (bind ?I (div ?*m* 2 )) >> (bind ?J (+ ?*m* ?*n* 2 )) >> (bind ?J'(+ (div (+ ?*m* 1) 2) 1)) >> (bind ?K (+ ?*m* 2 )) >> (bind ?L (+ (div (- ?*m* 3) 2) 3)) >> >> >> the error message: >> >> ?m = nil >> ?n = nil >> Exception in thread "main" Jess reported an error in routine >> Value.intValue >> while executing (div ?*m* 2) >> while executing (bind ?I (div ?*m* 2)) >> while executing (batch D:Jess71p1\module2.txt) >> Message: 'nil' is a symbol, not an integer. >> >> >> what's more, I once want use this in my java code, it did not work also: >> java code: >> >> Rete engine = new Rete(); >> >> engine.eval("(defglobal ?*m* = 7)"); >> engine.eval("(defglobal ?*n* = 5)"); >> >> "module2.txt": >> >> (printout t"?m = " ?*m* crlf) >> (printout t"?n = " ?*n* crlf) >> >> reports error: >> while executing (printout t "?m = " ?*m* crlf) >> while executing (batch D:\module2.txt) >> Message: No such variable *m*. >> >> >> >> >> >> >> >> On Thu, Nov 5, 2009 at 9:19 PM, Ernest Friedman-Hill <ejfried@... >> >wrote: >> >> I think if you just show us the actual code that caused the error, and >>> more >>> details about the error -- i.e., is this a runtime or compile-time error, >>> from Java or from Jess, and include a stack trace -- I'm sure we can help >>> you fix it. Please cut and paste the real code, and the real stack trace >>> -- >>> summaries and remembered bits and piece are normally not that helpful. >>> >>> >>> On Nov 5, 2009, at 1:29 AM, Weijing Bai wrote: >>> >>> hi, everyone >>> >>>> >>>> I have a problem . >>>> >>>> It works well when store a param in jess and fetch it in java, but it >>>> reports a error when store in java and fetch it in jess. the error is :" >>>> cannot find m" and so on. >>>> >>>> who has once use "store-fetch " sucessfully, please give me some >>>> suggestions. >>>> >>>> Is there any other way can pass a value from java to jess? >>>> >>>> thank very much. >>>> >>>> >>>> Esther Bai >>>> >>>> >>> --------------------------------------------------------- >>> Ernest Friedman-Hill >>> Informatics & Decision Sciences, Sandia National Laboratories >>> PO Box 969, MS 9012, Livermore, CA 94550 >>> http://www.jessrules.com >>> >>> >>> >>> >>> >>> >>> >>> -------------------------------------------------------------------- >>> To unsubscribe, send the words 'unsubscribe jess-users you@...' >>> in the BODY of a message to majordomo@..., NOT to the list >>> (use your own address!) List problems? Notify >>> owner-jess-users@... >>> >> > --------------------------------------------------------- > Ernest Friedman-Hill > Informatics & Decision Sciences Phone: (925) 294-2154 > Sandia National Labs > PO Box 969, MS 9012 ejfried@... > > Livermore, CA 94550 http://www.jessrules.com > > > > > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users you@...' > in the BODY of a message to majordomo@..., NOT to the list > (use your own address!) List problems? Notify owner-jess-users@... |
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Re: JESS: how to store and fetch between java & jess
by Jason Morris
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I should add that if I replace the code
(defglobal ?*m* = ((fetch m) intValue)) (defglobal ?*n* = ((fetch n) intValue)) with (defglobal ?*m* = (fetch m)) (defglobal ?*n* = (fetch n)) as in Weijing's orginal code, I get Jess reported an error in routine Value.intValue while executing (div ?*m* 2) while executing (bind ?I (div ?*m* 2)). Message: '<Java-Object:java.lang.Integer>' is JAVA_OBJECT, not an integer. Program text: ( bind ?I ( div ?*m* 2 ) ) at line 14 in file clp/a.clp. On Thu, Nov 5, 2009 at 9:08 AM, Ernest Friedman-Hill <ejfried@...>wrote: > You don't show the connection between the Java calls to "store()" and where > Jess reads the module2.txt file. Are you sure it's the same instance of > jess.Rete that's involved in both? In other words, where and how is "batch > module2.txt" being invoked? Each Rete object will have its own independent > storage map. > > If it is the same Rete object, then perhaps there's a call to "clear" > somewhere in between the store and fetch? > > > > > On Nov 5, 2009, at 8:47 AM, Weijing Bai wrote: > > oh，Thanks for your advice. >> >> >> my java code: >> >> Rete engine = new Rete(); >> engine.store("m", 7); >> engine.store("n", 5); >> >> the jess clp: >> " module2.txt" >> >> (defglobal ?*m* = (fetch m )) >> (defglobal ?*n* = (fetch n )) >> >> (printout t"?m = " ?*m* crlf) >> (printout t"?n = " ?*n* crlf) >> >> (bind ?I (div ?*m* 2 )) >> (bind ?J (+ ?*m* ?*n* 2 )) >> (bind ?J'(+ (div (+ ?*m* 1) 2) 1)) >> (bind ?K (+ ?*m* 2 )) >> (bind ?L (+ (div (- ?*m* 3) 2) 3)) >> >> >> the error message: >> >> ?m = nil >> ?n = nil >> Exception in thread "main" Jess reported an error in routine >> Value.intValue >> while executing (div ?*m* 2) >> while executing (bind ?I (div ?*m* 2)) >> while executing (batch D:Jess71p1\module2.txt) >> Message: 'nil' is a symbol, not an integer. >> >> >> what's more, I once want use this in my java code, it did not work also: >> java code: >> >> Rete engine = new Rete(); >> >> engine.eval("(defglobal ?*m* = 7)"); >> engine.eval("(defglobal ?*n* = 5)"); >> >> "module2.txt": >> >> (printout t"?m = " ?*m* crlf) >> (printout t"?n = " ?*n* crlf) >> >> reports error: >> while executing (printout t "?m = " ?*m* crlf) >> while executing (batch D:\module2.txt) >> Message: No such variable *m*. >> >> >> >> >> >> >> >> On Thu, Nov 5, 2009 at 9:19 PM, Ernest Friedman-Hill <ejfried@... >> >wrote: >> >> I think if you just show us the actual code that caused the error, and >>> more >>> details about the error -- i.e., is this a runtime or compile-time error, >>> from Java or from Jess, and include a stack trace -- I'm sure we can help >>> you fix it. Please cut and paste the real code, and the real stack trace >>> -- >>> summaries and remembered bits and piece are normally not that helpful. >>> >>> >>> On Nov 5, 2009, at 1:29 AM, Weijing Bai wrote: >>> >>> hi, everyone >>> >>>> >>>> I have a problem . >>>> >>>> It works well when store a param in jess and fetch it in java, but it >>>> reports a error when store in java and fetch it in jess. the error is :" >>>> cannot find m" and so on. >>>> >>>> who has once use "store-fetch " sucessfully, please give me some >>>> suggestions. >>>> >>>> Is there any other way can pass a value from java to jess? >>>> >>>> thank very much. >>>> >>>> >>>> Esther Bai >>>> >>>> >>> --------------------------------------------------------- >>> Ernest Friedman-Hill >>> Informatics & Decision Sciences, Sandia National Laboratories >>> PO Box 969, MS 9012, Livermore, CA 94550 >>> http://www.jessrules.com >>> >>> >>> >>> >>> >>> >>> >>> -------------------------------------------------------------------- >>> To unsubscribe, send the words 'unsubscribe jess-users you@...' >>> in the BODY of a message to majordomo@..., NOT to the list >>> (use your own address!) List problems? Notify >>> owner-jess-users@... >>> >> > --------------------------------------------------------- > Ernest Friedman-Hill > Informatics & Decision Sciences Phone: (925) 294-2154 > Sandia National Labs > PO Box 969, MS 9012 ejfried@... > > Livermore, CA 94550 http://www.jessrules.com > > > > > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users you@...' > in the BODY of a message to majordomo@..., NOT to the list > (use your own address!) List problems? Notify owner-jess-users@... |
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Re: JESS: how to store and fetch between java & jess
by Weijing Bai
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OH,YES!
It works! That's really what I wanted. Thanks very much! Thanks all you guys. PS: I am "she", not "he". Haha! On Thu, Nov 5, 2009 at 10:50 PM, Jason Morris <jason.c.morris@...>wrote: > Hey Ernest, > > Assuming that Weijing resolves the Rete instance disconnect, won't he still > will have a problem because he's trying to compute with the fetched Integer > object and not its int value? Here's how I massaged his code: > > ; a.clp > ; ====== > ; Note: this file has parsing errors because it lacks a Rete object > reference. > ; However, this script is called by the attached driver class, so it works. > > (defglobal ?*m* = ((fetch m) intValue)) > (defglobal ?*n* = ((fetch n) intValue)) > > (printout t"?m = " ?*m* crlf) ; checking m value > (printout t"?n = " ?*n* crlf) ; checking n value > > (bind ?I (div ?*m* 2 ))(printout t "?I = " ?I crlf) > (bind ?J (+ ?*m* ?*n* 2 ))(printout t "?J = " ?I crlf) > (bind ?J'(+ (div (+ ?*m* 1) 2) 1))(printout t "?J' = " ?J' crlf) > (bind ?K (+ ?*m* 2 ))(printout t "?K = " ?K crlf) > (bind ?L (+ (div (- ?*m* 3) 2) 3))(printout t "?L = " ?L crlf) > > then I wrote a simple driver to replace his missing code... > > import jess.JessException; > import jess.Rete; > > public class StoreProblemDriver { > public static void main(String[] args) { > Rete engine = new Rete(); > engine.store("m", 7); > engine.store("n", 5); > > try { > engine.batch("clp/a.clp"); > } catch (JessException e) { > e.printStackTrace(); > } > } > } > > which produced the output... > > ; OUTPUT > ;======== > ;?m = 7 > ;?n = 5 > ;?I = 3 > ;?J = 3 > ;?J' = 5 > ;?K = 9 > ;?L = 5 > > Weijing: Is this what you wanted? > > Cheers, > Jason > > > On Thu, Nov 5, 2009 at 9:08 AM, Ernest Friedman-Hill <ejfried@... > >wrote: > > > You don't show the connection between the Java calls to "store()" and > where > > Jess reads the module2.txt file. Are you sure it's the same instance of > > jess.Rete that's involved in both? In other words, where and how is > "batch > > module2.txt" being invoked? Each Rete object will have its own > independent > > storage map. > > > > If it is the same Rete object, then perhaps there's a call to "clear" > > somewhere in between the store and fetch? > > > > > > > > > > On Nov 5, 2009, at 8:47 AM, Weijing Bai wrote: > > > > oh，Thanks for your advice. > >> > >> > >> my java code: > >> > >> Rete engine = new Rete(); > >> engine.store("m", 7); > >> engine.store("n", 5); > >> > >> the jess clp: > >> " module2.txt" > >> > >> (defglobal ?*m* = (fetch m )) > >> (defglobal ?*n* = (fetch n )) > >> > >> (printout t"?m = " ?*m* crlf) > >> (printout t"?n = " ?*n* crlf) > >> > >> (bind ?I (div ?*m* 2 )) > >> (bind ?J (+ ?*m* ?*n* 2 )) > >> (bind ?J'(+ (div (+ ?*m* 1) 2) 1)) > >> (bind ?K (+ ?*m* 2 )) > >> (bind ?L (+ (div (- ?*m* 3) 2) 3)) > >> > >> > >> the error message: > >> > >> ?m = nil > >> ?n = nil > >> Exception in thread "main" Jess reported an error in routine > >> Value.intValue > >> while executing (div ?*m* 2) > >> while executing (bind ?I (div ?*m* 2)) > >> while executing (batch D:Jess71p1\module2.txt) > >> Message: 'nil' is a symbol, not an integer. > >> > >> > >> what's more, I once want use this in my java code, it did not work also: > >> java code: > >> > >> Rete engine = new Rete(); > >> > >> engine.eval("(defglobal ?*m* = 7)"); > >> engine.eval("(defglobal ?*n* = 5)"); > >> > >> "module2.txt": > >> > >> (printout t"?m = " ?*m* crlf) > >> (printout t"?n = " ?*n* crlf) > >> > >> reports error: > >> while executing (printout t "?m = " ?*m* crlf) > >> while executing (batch D:\module2.txt) > >> Message: No such variable *m*. > >> > >> > >> > >> > >> > >> > >> > >> On Thu, Nov 5, 2009 at 9:19 PM, Ernest Friedman-Hill < > ejfried@... > >> >wrote: > >> > >> I think if you just show us the actual code that caused the error, and > >>> more > >>> details about the error -- i.e., is this a runtime or compile-time > error, > >>> from Java or from Jess, and include a stack trace -- I'm sure we can > help > >>> you fix it. Please cut and paste the real code, and the real stack > trace > >>> -- > >>> summaries and remembered bits and piece are normally not that helpful |
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Re: JESS: how to store and fetch between java & jess
by Jason Morris
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OH,YES! You are very welcome :-) PS: I am "she", not "he". Haha! Cheers, Jason On Thu, Nov 5, 2009 at 10:19 AM, Weijing Bai <estherbaiweijing@...> wrote: OH,YES! -- Cheers, Jason ---------------------------------------------------------- Morris Technical Solutions LLC consulting@... (517) 304-5883 |
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Re: JESS: how to store and fetch between java & jess
by Jason Morris
::
Rate this Message:
OH,YES! You are very welcome :-) PS: I am "she", not "he". Haha! Cheers, Jason On Thu, Nov 5, 2009 at 10:19 AM, Weijing Bai <estherbaiweijing@...> wrote: OH,YES! -- Cheers, Jason ---------------------------------------------------------- Morris Technical Solutions LLC consulting@... (517) 304-5883 |
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