from:"Hunter McMillen"

Re: JESS: [EXTERNAL] Jess exception: ' ' is a list, not a string

2012-03-12 Thread Hunter McMillen

Thanks for your response Wolfgang,

Yes, getMyUnits() returns an ArrayListUnit; I don't believe this likely
to be the problem since I have these in other rules that are functioning.
More debugging shows that the error is occurring in routine
Value.stringValue. Do you see anywhere where I am trying to get the string
value of a list?

Hunter
 On Mon, Mar 12, 2012 at 9:38 AM, Wolfgang Laun wolfgang.l...@gmail.comwrote:

 Are you sure that
   (?*bwapi* getMyUnits)
 returns a list?

 Jess' foreach isn't quite as tolerant as for in Java 1.5 and later.
 You may have to return an java.util.iterator.

 -W


 On 10/03/2012, Hunter McMillen mcmil...@gmail.com wrote:
  I am receiving the error in the subject line when one of my rules is
  firing. I can't seem to find any other forum posts about it, here is my
  rule:
 
  (defrule build-supply-depot
  (minerals (value ?x:( ?x 100)))
  =
  (try
  (foreach ?u (?*bwapi* getMyUnits)
  (if (= (?u getTypeID) ?*SCV_ID*) then
  (bind ?p (call get-next-build-tile()))
  (call ?*bwapi* drawCircle ?p.x ?p.y 100 111 FALSE FALSE)
  (call ?*bwapi* build (?u getID) ?p.x ?p.y
  (UnitType$UnitTypes.Terran_Supply_Depot ordinal))
  (break)))
  catch
  (printout t (call ?ERROR toString) crlf)
  )
  )
 
  and here is the exact error message:
 
  while executing (foreach ?u (call ?*bwapi* getMyUnits)
 (if (= (call ?u getTypeID) ?*SCV_ID*)
  then
 (bind ?p (call get-next-build-tile ))
 (call ?*bwapi* drawCircle ?p.x ?p.y
 100
  111 FALSE FALSE)
 (call ?*bwapi* build (call ?u getID)
  ?p.x ?p.y (UnitType$UnitTypes.Terran_Supply_Depot ordinal))
 (break))).
 
Message: '' is a list, not  a string.
 
  But the error doesn't give me a line number.
 
  Any help would be appreciated.
  Thanks,
  Hunter McMillen
 

 
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Re: JESS: [EXTERNAL] Jess exception: ' ' is a list, not a string

2012-03-12 Thread Hunter McMillen

Here is the stacktrace:
 Message: '' is a list, not  a string.
   at jess.Value.a(Unknown Source)
   at jess.Value.a(Unknown Source)
   at jess.Value.a(Unknown Source)
   at jess.Value.stringValue(Unknown Source)
   at jess.Value.symbolValue(Unknown Source)
   at jess.dx.call(Unknown Source)
   at jess.ac.a(Unknown Source)
   at jess.Funcall.execute(Unknown Source)
   at jess.FuncallValue.resolveValue(Unknown Source)
   at jess.ce.call(Unknown Source)
   at jess.ac.a(Unknown Source)
   at jess.Funcall.execute(Unknown Source)
   at jess.FuncallValue.resolveValue(Unknown Source)
   at jess.f4.call(Unknown Source)
   at jess.ac.a(Unknown Source)
   at jess.Funcall.execute(Unknown Source)
   at jess.FuncallValue.resolveValue(Unknown Source)
   at jess.cu.a(Unknown Source)
   at jess.cu.call(Unknown Source)
   at jess.ac.a(Unknown Source)
   at jess.Funcall.execute(Unknown Source)
   at jess.FuncallValue.resolveValue(Unknown Source)
   at jess.i.call(Unknown Source)
   at jess.ac.a(Unknown Source)
   at jess.Funcall.execute(Unknown Source)
   at jess.Defrule.a(Unknown Source)
   at jess.Activation.a(Unknown Source)
   at jess.en.a(Unknown Source)
   at jess.en.a(Unknown Source)
   at jess.Rete.if(Unknown Source)
   at jess.Rete.run(Unknown Source)
   at hunterai.HunterAIClient.gameUpdate(HunterAIClient.java:156)
   at eisbot.proxy.JNIBWAPI.gameUpdate(JNIBWAPI.java:795)
   at eisbot.proxy.JNIBWAPI.startClient(Native Method)
   at eisbot.proxy.JNIBWAPI.start(JNIBWAPI.java:597)
   at hunterai.HunterAIClient.start(HunterAIClient.java:102)
   at hunterai.HunterAIClient.main(HunterAIClient.java:42)

The first line in my code that the trace lists is where I run the engine
from my Java application:

   engine.run();


Hunter

On Mon, Mar 12, 2012 at 11:40 AM, Friedman-Hill, Ernest
ejfr...@sandia.govwrote:

  Hmmm. If that's the whole error message, then the error should be
 occurring executing that foreach function, not a function nested inside
 it; otherwise there would be more context information. But foreach
 doesn't try to coerce anything into a string, so that doesn't make sense.

  Inside your catch block,  do this:

  (?ERROR printStackTrace)

  And show us what you get; that should narrow it down quite a bit.


   From: Hunter McMillen mcmil...@gmail.com
 Reply-To: jess-users@sandia.gov
 Date: Fri, 9 Mar 2012 23:10:06 -0500
 To: jess-users@sandia.gov
 Subject: JESS: [EXTERNAL] Jess exception: ' ' is a list, not a string

  I am receiving the error in the subject line when one of my rules is
 firing. I can't seem to find any other forum posts about it, here is my
 rule:

  (defrule build-supply-depot
 (minerals (value ?x:( ?x 100)))
 =
 (try
 (foreach ?u (?*bwapi* getMyUnits)
 (if (= (?u getTypeID) ?*SCV_ID*) then
 (bind ?p (call get-next-build-tile()))
 (call ?*bwapi* drawCircle ?p.x ?p.y 100 111 FALSE FALSE)
 (call ?*bwapi* build (?u getID) ?p.x ?p.y
 (UnitType$UnitTypes.Terran_Supply_Depot ordinal))
 (break)))
 catch
 (printout t (call ?ERROR toString) crlf)
 )
 )

  and here is the exact error message:

  while executing (foreach ?u (call ?*bwapi* getMyUnits)
(if (= (call ?u getTypeID) ?*SCV_ID*)
 then
(bind ?p (call get-next-build-tile ))
(call ?*bwapi* drawCircle ?p.x ?p.y 100
 111 FALSE FALSE)
(call ?*bwapi* build (call ?u getID)
 ?p.x ?p.y (UnitType$UnitTypes.Terran_Supply_Depot ordinal))
(break))).

Message: '' is a list, not  a string.

  But the error doesn't give me a line number.

  Any help would be appreciated.
 Thanks,
 Hunter McMillen

Re: JESS: [EXTERNAL] Jess exception: ' ' is a list, not a string

2012-03-12 Thread Hunter McMillen

That was exactly the problem, thanks. What is the general rule for function
calling in Jess, always without parentheses? I never would have caught that
error because when I see something like get-next-build-tile() the
parentheses tell me it is a function. Seeing it without the parens makes me
think it is a variable, even without the ? sign is front.

Also, as a corollary question; I am using an enumerated type in my rule:

(import eisbot.proxy.types.UnitType$UnitTypes)

(defrule build-supply-depot
(minerals (value ?x:( ?x 100)))
=
(try
(foreach ?u (?*bwapi* getMyUnits)
(if (= (?u getTypeID) ?*SCV_ID*) then
(bind ?p (call get-next-build-tile()))
(call ?*bwapi* drawCircle ?p.x ?p.y 100 111 FALSE FALSE)
* (call ?*bwapi* build (?u getID) ?p.x ?p.y
(UnitType$UnitTypes.Terran_Supply_Depot ordinal))*
(break)))
catch
(printout t (call ?ERROR toString) crlf)
)
)

But after importing when my rule tries to execute the bolded line above, I
get a class not found exception:

  Message: Class not found.
at jess.dx.call(Unknown Source)
at jess.ac.a(Unknown Source)
at jess.Funcall.execute(Unknown Source)
at jess.FuncallValue.resolveValue(Unknown Source)
at jess.dx.call(Unknown Source)
at jess.ac.a(Unknown Source)
at jess.Funcall.execute(Unknown Source)
at jess.FuncallValue.resolveValue(Unknown Source)
at jess.f4.call(Unknown Source)
at jess.ac.a(Unknown Source)
at jess.Funcall.execute(Unknown Source)
at jess.FuncallValue.resolveValue(Unknown Source)
at jess.cu.a(Unknown Source)
at jess.cu.call(Unknown Source)
at jess.ac.a(Unknown Source)
at jess.Funcall.execute(Unknown Source)
at jess.Defrule.a(Unknown Source)
at jess.Activation.a(Unknown Source)
at jess.en.a(Unknown Source)
at jess.en.a(Unknown Source)
at jess.Rete.if(Unknown Source)
at jess.Rete.run(Unknown Source)
at hunterai.HunterAIClient.gameUpdate(HunterAIClient.java:156)
at eisbot.proxy.JNIBWAPI.gameUpdate(JNIBWAPI.java:795)
at eisbot.proxy.JNIBWAPI.startClient(Native Method)
at eisbot.proxy.JNIBWAPI.start(JNIBWAPI.java:597)
at hunterai.HunterAIClient.start(HunterAIClient.java:102)
at hunterai.HunterAIClient.main(HunterAIClient.java:42)
Caused by: java.lang.ClassNotFoundException: new
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at jess.dc.for(Unknown Source)
at jess.dc.if(Unknown Source)
at jess.Rete.findClass(Unknown Source)
... 28 more

any ideas?

Hunter




On Mon, Mar 12, 2012 at 1:48 PM, Friedman-Hill, Ernest
ejfr...@sandia.govwrote:

  OK, I looked in the magic decoder file and I see a call being invoked
 inside a bind, so that fits only the line of code below. And lo and
 behold, look at it: the second argument to call, which should be the name
 of the function to call, is a pair of empty parentheses — i.e., a list.
 This line is asking Jess to to call the static method named () on the
 class named get-next-build-tile -- surely not what you intended. If
 you're just calling a deffunction by this name, then you just want

  (bind ?p (get-next-build-tile))

   From: Hunter McMillen mcmil...@gmail.com
 Reply-To: jess-users@sandia.gov
 Date: Mon, 12 Mar 2012 12:16:29 -0400
 To: jess-users@sandia.gov
 Subject: Re: JESS: [EXTERNAL] Jess exception: ' ' is a list, not a string

  (bind ?p (call get-next-build-tile()))

Re: JESS: [EXTERNAL] How to negate a variable when in lhs of a rule

2012-01-16 Thread Hunter McMillen

After a couple hours on the mail archive, I found the problem. When I added
the defglobal to the Rete engine I used this command:

*Defglobal playerIDGlobal = new Defglobal(*PLAYER_ID*, new
Value(self.getID()));*
*engine.addDefglobal(playerIDGlobal);*
*
*
But this doesn't specify a type for the Value object, so when I tried to
match against *?*PLAYER_ID** on the lhs of my rules it always returned
false because the type of the defglobal was defaulted to Java object. I
changed the command to this:

*Defglobal playerIDGlobal = new Defglobal(*PLAYER_ID*, new
Value(self.getID(), RU.INTEGER));*
*engine.addDefglobal(playerIDGlobal);*
*
*
And now everything seems to be working fine, Just out of curiosity though
how does Jess infer types of variables when it is matching on the lhs of
rules?

Thanks,
Hunter McMillen

On Wed, Jan 11, 2012 at 6:04 PM, Friedman-Hill, Ernest
ejfr...@sandia.govwrote:

  For everything to work right, you always have to use the asterisks (as I
 said, they're part of the name), and you must include a (defglobal)
  declaration before using the variable. Setting a global variable by hand
 without declaring it first produces undefined results (I.e., it'll work
 right some of the time.)

   From: Hunter McMillen mcmil...@gmail.com
 Reply-To: jess-users@sandia.gov
 Date: Wed, 11 Jan 2012 16:37:11 -0500
 To: jess-users@sandia.gov
 Subject: Re: JESS: [EXTERNAL] How to negate a variable when in lhs of a
 rule

  I placed the asterisks around PLAYER_ID then still received an error
 when the rule fired:  No such variable *PLAYER_ID* But then noticed that
 when I call setVariable, I name the variable PLAYER_ID not *PLAYER_ID* so I
 changed my statement to this:

  *engine.getGlobalContext().setVariable(*PLAYER_ID*, new
 Value(player.getID());*

  and everything works fine.

  Does* getGlobalContext().setVariable(...)* define global variables
 implicitly? or do you have to include the asterisks like I did?

  Thanks.
 Hunter McMillen

 On Wed, Jan 11, 2012 at 3:13 PM, Friedman-Hill, Ernest ejfr...@sandia.gov
  wrote:

  The asterisks are part of the defglobal's name. You're not comparing to
 the defglobal: you're binding the value in the slot to a new variable. It's
 not legal to negate such a constraint in its first use, as the error
 message said. You need to use

  * (unit (ID ?id) (typeID ?typeID) (player ~?*PLAYER_ID*))*


   From: Hunter McMillen mcmil...@gmail.com
 Reply-To: jess-users@sandia.gov
 Date: Wed, 11 Jan 2012 14:38:31 -0500
 To: jess-users@sandia.gov
 Subject: JESS: [EXTERNAL] How to negate a variable when in lhs of a rule

  Hi everyone,

  I am trying to differentiate between Objects that belong to a certain
 user inside two of my rules.

  I have a variable created from Java like this:

  *engine.getGlobalContext().setVariable(PLAYER_ID, new
 Value(player.getID());*
 *
 *
 And I want to use this variable in rules to determine which objects
 belong to each player.

  This rule works fine when just using ?PLAYER_ID
 *(defrule myUnitSeen *
 *   (unit (ID ?id) (typeID ?typeID) (player ?PLAYER_ID))*
 *=*
 * .)*
 *
 *
 But when I try to negate the variable I get an error, First use of
 variable negated: PLAYER_ID
  *(defrule enemyUnitSeen *
 *   (unit (ID ?id) (typeID ?typeID) (player ~?PLAYER_ID))*
 *=*
 * .)*
  *
 *
 How can I specify anything other than ?PLAYER_ID on the lhs of a rule?

  Thanks,
 Hunter McMillen

JESS: [EXTERNAL] How to negate a variable when in lhs of a rule

2012-01-11 Thread Hunter McMillen

Hi everyone,

I am trying to differentiate between Objects that belong to a certain user
inside two of my rules.

I have a variable created from Java like this:

*engine.getGlobalContext().setVariable(PLAYER_ID, new
Value(player.getID());*
*
*
And I want to use this variable in rules to determine which objects belong
to each player.

This rule works fine when just using ?PLAYER_ID
*(defrule myUnitSeen *
*   (unit (ID ?id) (typeID ?typeID) (player ?PLAYER_ID))*
*=*
* .)*
*
*
But when I try to negate the variable I get an error, First use of
variable negated: PLAYER_ID
*(defrule enemyUnitSeen *
*   (unit (ID ?id) (typeID ?typeID) (player ~?PLAYER_ID))*
*=*
* .)*
*
*
How can I specify anything other than ?PLAYER_ID on the lhs of a rule?

Thanks,
Hunter McMillen

Re: JESS: [EXTERNAL] How to negate a variable when in lhs of a rule

2012-01-11 Thread Hunter McMillen

I placed the asterisks around PLAYER_ID then still received an error when
the rule fired:  No such variable *PLAYER_ID* But then noticed that when
I call setVariable, I name the variable PLAYER_ID not *PLAYER_ID* so I
changed my statement to this:

*engine.getGlobalContext().setVariable(*PLAYER_ID*, new
Value(player.getID());*

and everything works fine.

Does* getGlobalContext().setVariable(...)* define global variables
implicitly? or do you have to include the asterisks like I did?

Thanks.
Hunter McMillen

On Wed, Jan 11, 2012 at 3:13 PM, Friedman-Hill, Ernest
ejfr...@sandia.govwrote:

  The asterisks are part of the defglobal's name. You're not comparing to
 the defglobal: you're binding the value in the slot to a new variable. It's
 not legal to negate such a constraint in its first use, as the error
 message said. You need to use

  * (unit (ID ?id) (typeID ?typeID) (player ~?*PLAYER_ID*))*


   From: Hunter McMillen mcmil...@gmail.com
 Reply-To: jess-users@sandia.gov
 Date: Wed, 11 Jan 2012 14:38:31 -0500
 To: jess-users@sandia.gov
 Subject: JESS: [EXTERNAL] How to negate a variable when in lhs of a rule

  Hi everyone,

  I am trying to differentiate between Objects that belong to a certain
 user inside two of my rules.

  I have a variable created from Java like this:

  *engine.getGlobalContext().setVariable(PLAYER_ID, new
 Value(player.getID());*
 *
 *
 And I want to use this variable in rules to determine which objects belong
 to each player.

  This rule works fine when just using ?PLAYER_ID
 *(defrule myUnitSeen *
 *   (unit (ID ?id) (typeID ?typeID) (player ?PLAYER_ID))*
 *=*
 * .)*
 *
 *
 But when I try to negate the variable I get an error, First use of
 variable negated: PLAYER_ID
  *(defrule enemyUnitSeen *
 *   (unit (ID ?id) (typeID ?typeID) (player ~?PLAYER_ID))*
 *=*
 * .)*
  *
 *
 How can I specify anything other than ?PLAYER_ID on the lhs of a rule?

  Thanks,
 Hunter McMillen

JESS: [EXTERNAL] Iterate over a Java List in Jess

2011-12-13 Thread Hunter McMillen

Is there anyway to iterate over a Java List object from Jess?

I have a Java object that I store in a Jess variable:

engine.getGlobalContext().setVariable(bwapi, new Value(bwapi));

one of the methods that can be called on bwapi returns a Java ArrayList,
and I would like to be able to iterate over this list to check certain
properties of its elements.

Right now I am doing this:

engine.executeCommand((bind ?units (create$ =(?bwapi getMyUnits;
engine.executeCommand(foreach ?u ?units (printout t ?u crlf)));

but when the units are supposed to be printed all I get is:

=
Java-Object:java.util.ArrayList

Any ideas?

Thanks,
Hunter M

Re: JESS: [EXTERNAL] Access public enum inside of a class

2011-12-08 Thread Hunter McMillen

Thanks very much that worked perfectly.

Hunter McMillen

On Wed, Dec 7, 2011 at 5:10 PM, Friedman-Hill, Ernest ejfr...@sandia.govwrote:

 Nested enums, like nested classes, actually secretly have a name like
 UnitType$UnitTypes. I haven't tried this specifically for enums, but I
 suspect this would work:

 engine.executeCommand((import eisbot.proxy.types.UnitType$UnitTypes));

 
 From: owner-jess-us...@sandia.gov [mailto:owner-jess-us...@sandia.gov] On
 Behalf Of Hunter McMillen
 Sent: Wednesday, December 07, 2011 4:27 PM
 To: jess-users
 Subject: JESS: [EXTERNAL] Access public enum inside of a class

 Hi everyone,

 I am trying to use an enum from one of my Java classes inside of Jess. I
 read a forum post that said I could use the (import enum-name) feature to
 import enums into Jess, but that only seems to work when the enum is itself
 in a separate file.

 I have a class called UnitType, inside of it there is a public enum called
 UnitTypes where all of the UnitTypes in my game are listed. In Java to
 access this I would use UnitType.UnitTypes.Element_in_enum to get to the
 enum

JESS: [EXTERNAL] Access public enum inside of a class

2011-12-07 Thread Hunter McMillen

Hi everyone,

I am trying to use an enum from one of my Java classes inside of Jess. I
read a forum post that said I could use the (import enum-name) feature to
import enums into Jess, but that only seems to work when the enum is itself
in a separate file.

I have a class called UnitType, inside of it there is a public enum called
UnitTypes where all of the UnitTypes in my game are listed. In Java to
access this I would use UnitType.UnitTypes.Element_in_enum to get to the
enum.

When I try this in Jess however, I get an error:
*Rete engine = new Rete();*
*engine.executeCommand((import eisbot.proxy.types.UnitType.UnitTypes));*

an error occurs,* java.lang.ClassNotFoundException:
eisbot.proxy.types.UnitType.UnitTypes*

I am curious as to how I could go about accessing an enum that is inside of
a Java class from Jess.

any help would be appreciated.

Thanks
Hunter McMillen

Re: [EXTERNAL] Re: JESS: Ignore slots when matching lhs of rules

2011-11-11 Thread Hunter McMillen

This is what I thought it should be so I was confused when my rule wasn't
firing. Thank you for your response. Somehow magically this morning the
rule is firing as it should be. Ill attribute that to you :)

Thanks

On Fri, Nov 11, 2011 at 12:47 AM, Wolfgang Laun wolfgang.l...@gmail.comwrote:

 You need not worry about the object fields you don't care about when
 matching the unit fact in a rule. By definition, only slots used in the
 pattern matter; all others are literally don't care.

 -W


 On 11 November 2011 04:57, Hunter McMillen mcmil...@gmail.com wrote:

 Hi everyone,

  I am trying to match the lhs of a rule using a template that has 112
 slots that is defined from a Java class.

  Here is the template definition (from show-deftemplates):

  (deftemplate MAIN::unit
 $JAVA-OBJECT$ eisbot.proxy.model.Unit
 (declare (from-class eisbot.proxy.model.Unit)))

 Now every time that I encounter a unit object in my application I define
 an instance of the unit to Jess from Java:

 engine.defclass(unit, eisbot.proxy.model.Unit, null, true); (I only
 do this the first time)

 Unit unit = //retrieve a unit
 engine.definstance(unit, unit, false);

 All of this above is working as it should be, but now when I try to match
 a unit in a rule I am having trouble:

 String unitSeen = (defrule unitSeen  +
   (unit (ID ?id) (typeID ?typeID))  +
   =  +
   (printout t \Unit seen with ID: \ ?id
 crlf));

 engine.executeCommand(unitSeen);

 The problem is that the Unit class has 112 attributes, I am only listing
 two ID and typeID, and there are probably only another handful that I care
 about and need to use. Is there any way to ignore the rest of the slots in
 the template, matching only on a few slots?

 Goal:

 The main goal of what I am trying to is that when I encounter a Unit in
 my game application, I want to assert that unit object to Jess as a fact,
 then match rules on the existence of a Unit. Right now I only want to match
 on the existence of ANY unit, but later on the matches will be more
 specific.

 Any help would be most appreciated.

 Thanks.
 Hunter McMillen

JESS: Ignore slots when matching lhs of rules

2011-11-10 Thread Hunter McMillen

Hi everyone,

 I am trying to match the lhs of a rule using a template that has 112 slots
that is defined from a Java class.

 Here is the template definition (from show-deftemplates):

 (deftemplate MAIN::unit
$JAVA-OBJECT$ eisbot.proxy.model.Unit
(declare (from-class eisbot.proxy.model.Unit)))

Now every time that I encounter a unit object in my application I define an
instance of the unit to Jess from Java:

engine.defclass(unit, eisbot.proxy.model.Unit, null, true); (I only do
this the first time)

Unit unit = //retrieve a unit
engine.definstance(unit, unit, false);

All of this above is working as it should be, but now when I try to match a
unit in a rule I am having trouble:

String unitSeen = (defrule unitSeen  +
  (unit (ID ?id) (typeID ?typeID))  +
  =  +
  (printout t \Unit seen with ID: \ ?id crlf));

engine.executeCommand(unitSeen);

The problem is that the Unit class has 112 attributes, I am only listing
two ID and typeID, and there are probably only another handful that I care
about and need to use. Is there any way to ignore the rest of the slots in
the template, matching only on a few slots?

Goal:

The main goal of what I am trying to is that when I encounter a Unit in my
game application, I want to assert that unit object to Jess as a fact, then
match rules on the existence of a Unit. Right now I only want to match on
the existence of ANY unit, but later on the matches will be more specific.

Any help would be most appreciated.

Thanks.
Hunter McMillen

Re: JESS: Is it possible to bind a Java object directly to a Jess variable without creating a new object?

2011-11-07 Thread Hunter McMillen

Thanks for your quick reply. After I manage to get my Java object into
Jess, can I assert it as a fact? Then have rules lhs match on the existence
of some object with attributes x, y, and z?

Hunter

On Fri, Nov 4, 2011 at 4:01 PM, Friedman-Hill, Ernest ejfr...@sandia.govwrote:

 **
 There are (obviously) two options: (a) put the object somewhere
 accessible, and run Jess code that retrieves it, or (b) use Jess's Java API
 to set a Jess variable to contain the object. Either would work. The
 store/fetch mechanism is sort of an built-in easy way to do (a).
 Alternatively, say there's a global variable ?*x* defined in your Jess
 program. Then you can say

 engine.getGlobalContext().setVariable(*x*, new Value(unit));

 and your Jess code can later get the value of *x*.

 If you don't like using variables this way, there's always directly
 invoking Jess functions from Java. Here we invoke 'add' to add the object
 to working memory directly:

 new Funcall(add, engine).arg(new
 Value(unit)).execute(engine.getGlobalContext());



  --
 *From:* owner-jess-us...@sandia.gov [mailto:owner-jess-us...@sandia.gov] *On
 Behalf Of *Hunter McMillen
 *Sent:* Friday, November 04, 2011 1:08 PM
 *To:* jess-users
 *Subject:* JESS: Is it possible to bind a Java object directly to a Jess
 variable without creating a new object?

  Hi everyone,

  I am trying to assert to Jess that an object exists when I encounter a
 new object in my Java program. Right now I am using a template to mirror
 that object (i.e I have slot values for all of the Java objects fields)
  but this seems redundant to me. Is there any way to just bind a Java
 object to a Jess variable without creating a new Java object?

  A lot of the examples I see online and from JIA are of the form:
 (bind ?map (new HashMap))

  or

  (call Classname method params...)

  but these either create  a new object or call static methods. I already
 have the Java object and just want to store it.

  But I was hoping that there was someway I could do something like this:
 public Rete engine = new Rete();

  public void unitDiscovered()
 {
 Unit unit = some unit encountered; //Java object
 engine.executeCommand((bind ?unit unit));
 engine.executeCommand((assert ?unit));
  }

  Or would I have to use the store() and fetch() methods for this?

  public void unitDiscovered()
 {
 Unit unit = some unit encountered; //Java object
 engine.store(UNIT, unit);
  engine.executeCommand((bind ?unit (fetch UNIT));
 engine.executeCommand((assert ?unit));
  }

  Basically I want to know the best practice for binding Java objects to
 Jess variables so I can assert them to the engine.

  Thanks,
 Hunter McMillen

JESS: Is it possible to bind a Java object directly to a Jess variable without creating a new object?

2011-11-04 Thread Hunter McMillen

Hi everyone,

I am trying to assert to Jess that an object exists when I encounter a new
object in my Java program. Right now I am using a template to mirror that
object (i.e I have slot values for all of the Java objects fields)  but
this seems redundant to me. Is there any way to just bind a Java object to
a Jess variable without creating a new Java object?

A lot of the examples I see online and from JIA are of the form:
(bind ?map (new HashMap))

or

(call Classname method params...)

but these either create  a new object or call static methods. I already
have the Java object and just want to store it.

But I was hoping that there was someway I could do something like this:
public Rete engine = new Rete();

public void unitDiscovered()
{
Unit unit = some unit encountered; //Java object
engine.executeCommand((bind ?unit unit));
engine.executeCommand((assert ?unit));
}

Or would I have to use the store() and fetch() methods for this?

public void unitDiscovered()
{
Unit unit = some unit encountered; //Java object
engine.store(UNIT, unit);
engine.executeCommand((bind ?unit (fetch UNIT));
engine.executeCommand((assert ?unit));
}

Basically I want to know the best practice for binding Java objects to Jess
variables so I can assert them to the engine.

Thanks,
Hunter McMillen

Re: JESS: Call Jess from C++ via JNI

2011-10-03 Thread Hunter McMillen

Well I am trying to create an agent to compete in the Starcraft AI
competition for next year, the API that the agents all use is called BWAPI:
http://code.google.com/p/bwapi/, but this is also a standard library that
some of the agents use that would be really useful for for my agent called
BWSAL: http://code.google.com/p/bwsal/. Anyway there is a native interface
that someone created for BWAPI, which I was planning on using in my code, so
my plan was to create a native interface for BWSAL, that way I could do all
the Jess interaction inside of Java, then call associated methods in C++ via
JNI. Does this sound far-fetched?

On Thu, Sep 29, 2011 at 5:10 PM, Socrates Frangis soc.fran...@gmail.comwrote:

 What framework are you using? Curious to see how it is invoking JNI.


 using this I think I can only interact with Jess in my Java program then
 pass data from my Java code to C++
 -Unless your framework has an API supporting JESS specifically, i doubt
 that is the case.  It should be providing a 'simpler' implementation to
 access your java classes but that would just eliminate the cryptic path
 declaration and still give you an interface to what youre playing with.

 Overall opinion, given the chance that your framework may inhibit full
 controll of the Rete engine or using JESS (and for the learning experience)
 i would recommend sticking with your current implementation.  Rule engines
 require precise attention to detail and i wouldn't risk the chance of losing
 fidelity.


 On Wed, Sep 28, 2011 at 2:22 PM, Hunter McMillen mcmil...@gmail.comwrote:

 Sorry to pester you with more questions.

 The way I am currently doing things in invoking a JVM from C++ to call
 Java code that calls/interacts with Jess code, but it turns out that someone
 has actually created a java native interface for the api/framework I am
 using to make my agent, using this I think I can only interact with Jess in
 my Java program then pass data from my Java code to C++, I was wondering if
 you thought this would be a better solution than invoke a JVM from C++

 Thanks
 Hunter


 On Tue, Sep 27, 2011 at 12:03 PM, Friedman-Hill, Ernest 
 ejfr...@sandia.gov wrote:

 **
 This is all perfectly reasonable so far. When you create the JVM you'll
 need to tell it where jess.jar is, along with any other jars you use, with
 the -cp flag or the java.class.path property.

 Once you have this working, you'll presumably want to connect things a
 little more tightly. You can use the JNI API to write the equivalent of your
 three-line main() in C++ pretty easily; you'll want to put together a C++
 version executeCommand() that controls the Rete instance, passes a script
 along, executes it, and gets the Value back, decoding it as needed.


  --
 *From:* owner-jess-us...@sandia.gov [mailto:owner-jess-us...@sandia.gov]
 *On Behalf Of *Hunter McMillen
 *Sent:* Monday, September 26, 2011 8:51 PM
 *To:* jess-users
 *Subject:* JESS: Call Jess from C++ via JNI

  Hello everyone,

   I am working on a project where I am using a C++ framework and API to
 create a game agent. My agent has to be flexible so it can react to/predict
 events that occur inside the game environment, Jess has the kind
 of flexibility that I need for my agent to be good,  but I am having trouble
 connecting to Jess from C++ and that is where I was hoping someone could
 help me out.

  *What I am doing right now*
 I have a C++ program that starts a Java Virtual Machine and searches for
 a Java class file name TestJNIJessInvoke

  Inside of TestJNIJessInvoke.java I define a simple function in Jess,
 and try to call that function then print the result
  import jess.*;
 public class TestJNIJessInvoke
 {
 public static void main(String[] args) throws JessException
 {
 Rete r = new Rete();
 r.executeCommand((deffunction square (?n) (return (* ?n ?n;
 Value v = r.executeCommand((square 3));

  System.out.println(v.intValue(r.getGlobalContext()));
 }
 }

  But when I try to compile and link the C++ file with:
 *cl *
 *   -IC:\Program Files\Java\jdk1.7.0\include *
 *   -IC:\Program Files\Java\jdk1.7.0\include\win32 *
 *   TestJNIJessInvoke.cpp *
 *   -link C:\Program Files\Java\jdk1.7.0\lib\jvm.lib*
  *
 *
 I get a class loader exception:
  *Exception in thread main java.lang.NoClassDefFoundError: jess/Rete*
 *at TestJNIJessInvoke.main(TestJNIJessInvoke.java:6)*
 *Caused by: java.lang.ClassNotFoundException: jess.Rete*
 *at java.net.URLClassLoader$1.run(URLClassLoader.java:366)*
 *at java.net.URLClassLoader$1.run(URLClassLoader.java:355)*
 *at java.security.AccessController.doPrivileged(Native Method)*
 *at java.net.URLClassLoader.findClass(URLClassLoader.java:354)*
 *at java.lang.ClassLoader.loadClass(ClassLoader.java:423)*
 *at
 sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)*
 *at java.lang.ClassLoader.loadClass(ClassLoader.java:356)*
 *... 1 more

Re: JESS: Call Jess from C++ via JNI

2011-09-28 Thread Hunter McMillen

Thanks a lot! That was exactly what was going wrong.

Hunter

On Tue, Sep 27, 2011 at 1:31 PM, Friedman-Hill, Ernest
ejfr...@sandia.govwrote:

 **
 The problem is here. The Java classpath doesn't list directories in which
 jar files can be found, but rather, the jar files themselves. The argument
 should be, e.g., -Djava.class.path=./jess.jar.

  * options[0].optionString = (char*)-Djava.class.path=.;  //the
 current directory is where jess.jar is also*

Re: JESS: Call Jess from C++ via JNI

2011-09-28 Thread Hunter McMillen

Sorry to pester you with more questions.

The way I am currently doing things in invoking a JVM from C++ to call Java
code that calls/interacts with Jess code, but it turns out that someone has
actually created a java native interface for the api/framework I am using to
make my agent, using this I think I can only interact with Jess in my Java
program then pass data from my Java code to C++, I was wondering if you
thought this would be a better solution than invoke a JVM from C++

Thanks
Hunter

On Tue, Sep 27, 2011 at 12:03 PM, Friedman-Hill, Ernest
ejfr...@sandia.govwrote:

 **
 This is all perfectly reasonable so far. When you create the JVM you'll
 need to tell it where jess.jar is, along with any other jars you use, with
 the -cp flag or the java.class.path property.

 Once you have this working, you'll presumably want to connect things a
 little more tightly. You can use the JNI API to write the equivalent of your
 three-line main() in C++ pretty easily; you'll want to put together a C++
 version executeCommand() that controls the Rete instance, passes a script
 along, executes it, and gets the Value back, decoding it as needed.


  --
 *From:* owner-jess-us...@sandia.gov [mailto:owner-jess-us...@sandia.gov] *On
 Behalf Of *Hunter McMillen
 *Sent:* Monday, September 26, 2011 8:51 PM
 *To:* jess-users
 *Subject:* JESS: Call Jess from C++ via JNI

  Hello everyone,

   I am working on a project where I am using a C++ framework and API to
 create a game agent. My agent has to be flexible so it can react to/predict
 events that occur inside the game environment, Jess has the kind
 of flexibility that I need for my agent to be good,  but I am having trouble
 connecting to Jess from C++ and that is where I was hoping someone could
 help me out.

  *What I am doing right now*
 I have a C++ program that starts a Java Virtual Machine and searches for a
 Java class file name TestJNIJessInvoke

  Inside of TestJNIJessInvoke.java I define a simple function in Jess,
 and try to call that function then print the result
  import jess.*;
 public class TestJNIJessInvoke
 {
 public static void main(String[] args) throws JessException
 {
 Rete r = new Rete();
 r.executeCommand((deffunction square (?n) (return (* ?n ?n;
 Value v = r.executeCommand((square 3));

  System.out.println(v.intValue(r.getGlobalContext()));
 }
 }

  But when I try to compile and link the C++ file with:
 *cl *
 *   -IC:\Program Files\Java\jdk1.7.0\include *
 *   -IC:\Program Files\Java\jdk1.7.0\include\win32 *
 *   TestJNIJessInvoke.cpp *
 *   -link C:\Program Files\Java\jdk1.7.0\lib\jvm.lib*
  *
 *
 I get a class loader exception:
  *Exception in thread main java.lang.NoClassDefFoundError: jess/Rete*
 *at TestJNIJessInvoke.main(TestJNIJessInvoke.java:6)*
 *Caused by: java.lang.ClassNotFoundException: jess.Rete*
 *at java.net.URLClassLoader$1.run(URLClassLoader.java:366)*
 *at java.net.URLClassLoader$1.run(URLClassLoader.java:355)*
 *at java.security.AccessController.doPrivileged(Native Method)*
 *at java.net.URLClassLoader.findClass(URLClassLoader.java:354)*
 *at java.lang.ClassLoader.loadClass(ClassLoader.java:423)*
 *at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)*
 *at java.lang.ClassLoader.loadClass(ClassLoader.java:356)*
 *... 1 more*
  *
 *
  Exception in thread main java.lang.NoClassDefFoundError: jess/Rete
 at TestJNIJessInvoke.main(TestJNIJessInvoke.java:6)
 Caused by: java.lang.ClassNotFoundException: jess.Rete
 at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
 at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
 ... 1 more

  *Questions*

  1) Is there some other directory that I am supposed to be including that
 has the .class files for Jess? Right now all I am including is jess.jar
 2) Is the general design I have a good idea? or is there a better way to
 facilitate communication between Jess and C++?



  Thanks,
 Hunter McMillen

Re: JESS: Call Jess from C++ via JNI

2011-09-27 Thread Hunter McMillen

Well the framework and API I am using are very large, so much so that it
would be unreasonable to rewrite them in Java. Sorry for the somewhat
unspecific question? Really I wanted to know why the class loader couldn't
find the jess.Rete class, when I have jess.jar on my classpath, and have it
in the directory where the c++ program executes.

Here is the c++ code where I create the JVM:

*#include jni.h*
*#include cstdlib*
*using namespace std;*
*int main() *
*{*
* JNIEnv *env;*
* JavaVM *jvm;*
* jint res;*
* jclass cls;*
* jmethodID mid;*
* jstring jstr;*
* jclass stringClass;*
* jobjectArray args;*
* *
* JavaVMInitArgs vm_args; /* JDK/JRE 6 VM initialization arguments */*
* JavaVMOption* options = new JavaVMOption[1];*
* options[0].optionString = (char*)-Djava.class.path=.;  //the
current directory is where jess.jar is also*
* vm_args.version = JNI_VERSION_1_6;*
* vm_args.nOptions = 1;*
* vm_args.options = options;*
* vm_args.ignoreUnrecognized = false;*
*
*
* /* load and initialize a Java VM, return a JNI interface*
*  * pointer in env */*
* JNI_CreateJavaVM(jvm, (void**)env, vm_args);*
* cls  = env-FindClass(TestJNIJessInvoke);*
* mid= env-GetStaticMethodID(cls, main, **
([Ljava/lang/String;)V);*
* jstr = env-NewStringUTF();*
* stringClass = env-FindClass(java/lang/String);*
* args   = env-NewObjectArray(1, stringClass, jstr);*
*
*
* env-CallStaticVoidMethod(cls, mid, args);*
* *
* if (env-ExceptionOccurred()) *
* {*
* env-ExceptionDescribe();*
* }*
* jvm-DestroyJavaVM();*
*}*


On Tue, Sep 27, 2011 at 11:58 AM, Dusan Sormaz sor...@ohio.edu wrote:

  Hunter,

 This is not Jess specific question. JVM simply can not find Java class to
 load.
 Can you show snippet of the C++ code that starts jvm and tries to load
 TestJNIJessinvoke?

 As for overall design, is C++ requirement? Can you do it all in Java?

 Dusan Sormaz


 On 9/26/2011 8:51 PM, Hunter McMillen wrote:

 Hello everyone,

   I am working on a project where I am using a C++ framework and API to
 create a game agent. My agent has to be flexible so it can react to/predict
 events that occur inside the game environment, Jess has the kind
 of flexibility that I need for my agent to be good,  but I am having trouble
 connecting to Jess from C++ and that is where I was hoping someone could
 help me out.

  *What I am doing right now*
 I have a C++ program that starts a Java Virtual Machine and searches for a
 Java class file name TestJNIJessInvoke

  Inside of TestJNIJessInvoke.java I define a simple function in Jess,
 and try to call that function then print the result
  import jess.*;
 public class TestJNIJessInvoke
 {
 public static void main(String[] args) throws JessException
 {
  Rete r = new Rete();
  r.executeCommand((deffunction square (?n) (return (* ?n ?n;
  Value v = r.executeCommand((square 3));

   System.out.println(v.intValue(r.getGlobalContext()));
 }
 }

  But when I try to compile and link the C++ file with:
 *cl *
 *   -IC:\Program Files\Java\jdk1.7.0\include *
 *   -IC:\Program Files\Java\jdk1.7.0\include\win32 *
 *   TestJNIJessInvoke.cpp *
 *   -link C:\Program Files\Java\jdk1.7.0\lib\jvm.lib*
  *
 *
 I get a class loader exception:
  *Exception in thread main java.lang.NoClassDefFoundError: jess/Rete*
 *at TestJNIJessInvoke.main(TestJNIJessInvoke.java:6)*
 *Caused by: java.lang.ClassNotFoundException: jess.Rete*
 *at java.net.URLClassLoader$1.run(URLClassLoader.java:366)*
 *at java.net.URLClassLoader$1.run(URLClassLoader.java:355)*
 *at java.security.AccessController.doPrivileged(Native Method)*
 *at java.net.URLClassLoader.findClass(URLClassLoader.java:354)*
 *at java.lang.ClassLoader.loadClass(ClassLoader.java:423)*
 *at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)*
 *at java.lang.ClassLoader.loadClass(ClassLoader.java:356)*
 *... 1 more*
  *
 *
  Exception in thread main java.lang.NoClassDefFoundError: jess/Rete
 at TestJNIJessInvoke.main(TestJNIJessInvoke.java:6)
 Caused by: java.lang.ClassNotFoundException: jess.Rete
 at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
 ... 1 more

  *Questions*

  1) Is there some other directory that I am supposed to be including that
 has the .class files for Jess? Right now all I am including is jess.jar
 2) Is the general design I have a good idea? or is there a better way to
 facilitate

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JESS: [EXTERNAL] Access public enum inside of a class

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JESS: Ignore slots when matching lhs of rules

Re: JESS: Is it possible to bind a Java object directly to a Jess variable without creating a new object?

JESS: Is it possible to bind a Java object directly to a Jess variable without creating a new object?

Re: JESS: Call Jess from C++ via JNI

Re: JESS: Call Jess from C++ via JNI

Re: JESS: Call Jess from C++ via JNI

Re: JESS: Call Jess from C++ via JNI

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