Is it possible to self-introspect the rule definition? For example: when $redCar : Car(color == 'red') then System.out.println("a red car exists"); Is it possible to know that the above rule uses the Car fact and the Car.color attribute?

Thanks G. Patel ----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

I need it at rule definition time, or when the rule is saved. Could you point me to a starting place in the internal api ?

Thanks G. Patel From: Mark Proctor <mproctor(a)codehaus.org&gt; To: rules-users(a)lists.jboss.org Date: 02/16/2012 10:06 PM Subject: Re: [rules-users] Rule definition introspection Sent by: rules-users-bounces(a)lists.jboss.org ------------------------------------------------------------------------ On 17/02/2012 01:11, _GPatel(a)tsys.com_ <mailto:GPatel@tsys.com>wrote: Is it possible to self-introspect the rule definition? For example: when $redCar : Car(color == 'red') then System.out.println("a red car exists"); Is it possible to know that the above rule uses the Car fact and the Car.color attribute? Yes, but you'll need to dig into internal apis. If you are doing this at runtime just start introspecting the rule object to get an idea of all the internal data structures. Mark Thanks G. Patel----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you _______________________________________________ rules-users mailing list _rules-users(a)lists.jboss.org_ <mailto:rules-users@lists.jboss.org> _https://lists.jboss.org/mailman/listinfo/rules-users_ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Below is some code that indicates the general direction. Since it uses the unstable API, it may not work as well any more, it was good in 5.1.1 and it still works using 5.3.0 with straightforward patterns. Mark does not agree with me that it is a legitimate wish of Drools application development to inspect binary packages, e.g., for documentation purposes, and he refuses to have any of this in the stable API. Constant dripping wears away the stone. ;-)

-W On 17/02/2012, Mark Proctor&lt;mproctor(a)codehaus.org&gt; wrote: > On 17/02/2012 05:37, GPatel(a)tsys.com wrote: >> I need it at rule definition time, or when the rule is saved. Could >> you point me to a starting place in the internal api ? > take a look in drools-compiler and org.drools.lang.RuleParserTest. > > Mark >> Thanks >> G. Patel >> package whatever; import java.io.PrintStream; import java.util.Formatter; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import org.drools.KnowledgeBase; import org.drools.base.ClassObjectType; import org.drools.definition.KnowledgePackage; import org.drools.definitions.impl.KnowledgePackageImp; import org.drools.rule.Accumulate; import org.drools.rule.Collect; import org.drools.rule.EntryPoint; import org.drools.rule.EvalCondition; import org.drools.rule.Forall; import org.drools.rule.From; import org.drools.rule.GroupElement; import org.drools.rule.Pattern; import org.drools.rule.Rule; import org.drools.spi.ObjectType; public class RulesByClasses { private Formatter fmt; private String ruleName; private String packageName; private Map<String,Set<String>> class2rules; public RulesByClasses( PrintStream printStream ){ fmt = new Formatter( printStream ); } public RulesByClasses(){ this( System.out ); } private void register( String className ){ Set<String> ruleSet = class2rules.get( className ); if( ruleSet == null ){ ruleSet = new HashSet<String>(); class2rules.put( className, ruleSet ); } ruleSet.add( "\"" + ruleName + "\" in " + packageName ); } private void inspectCollect( Collect collect ){ inspectPattern( collect.getSourcePattern() ); inspectNestedElements( collect.getNestedElements() ); } private void inspectAccumulate( Accumulate accumulate ){ inspectNestedElements( accumulate.getNestedElements() ); } private void inspectFrom( From from ){ inspectNestedElements( from.getNestedElements() ); } private void inspectNestedElements( List<?> nested ){ for( Object o: nested ){ if( o instanceof Pattern ){ inspectPattern( (Pattern)o ); } else if( o instanceof GroupElement ){ inspectGroupElement( (GroupElement)o ); } else if( o instanceof Forall ){ inspectForall( (Forall)o ); } else if( o instanceof Collect ){ inspectCollect( (Collect)o ); } else if( o instanceof Accumulate ){ inspectAccumulate( (Accumulate)o ); } else if( o instanceof From ){ inspectFrom( (From)o ); } else if( o instanceof EntryPoint ){ //... } else { throw new IllegalStateException( "unexpected CE " + o.getClass() ); } } } private void inspectPattern( Pattern pattern ){ ObjectType objectType = pattern.getObjectType(); if( objectType instanceof ClassObjectType ){ ClassObjectType classObjectType = (ClassObjectType)objectType; register( classObjectType.getClassName() ); } inspectNestedElements( pattern.getNestedElements() ); } private void inspectForall( Forall forall ){ inspectNestedElements( forall.getNestedElements() ); } private void inspectGroupElement( GroupElement groupElement ){ for( Object o: groupElement.getChildren() ){ if( o instanceof Pattern ){ inspectPattern( (Pattern)o ); } else if( o instanceof GroupElement ){ inspectGroupElement( (GroupElement)o ); } else if( o instanceof Forall ){ inspectForall( (Forall)o ); } else if( o instanceof EvalCondition ){ // ... } else { throw new IllegalStateException( "unexpected CE " + o.getClass() ); } } } private void inspect( KnowledgePackage kPackage ){ packageName = kPackage.getName(); for( org.drools.definition.rule.Rule ruleCopy: kPackage.getRules() ){ ruleName = ruleCopy.getName(); Rule rule = (Rule)((KnowledgePackageImp)kPackage).getRule( ruleName ); inspectGroupElement( rule.getLhs() ); } } private void emit(){ for( Map.Entry<String,Set<String>> entry: class2rules.entrySet() ){ fmt.format( "Class %s%n", entry.getKey() ); for( String ruleNamePack: entry.getValue() ){ fmt.format( " %s%n", ruleNamePack ); } } } public void print( KnowledgePackage kPackage ){ class2rules = new HashMap<String,Set<String>>(); inspect( kPackage ); emit(); } public void print( KnowledgeBase kBase ){ class2rules = new HashMap<String,Set<String>>(); for( KnowledgePackage kPackage: kBase.getKnowledgePackages() ){ inspect( kPackage ); } emit(); } } _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

On 17/02/2012 13:54, Wolfgang Laun wrote: > Below is some code that indicates the general direction. Since it uses > the unstable API, it may not work as well any more, it was good in 5.1.1 > and it still works using 5.3.0 with straightforward patterns. > > Mark does not agree with me that it is a legitimate wish of Drools > application development to inspect binary packages, e.g., for > documentation purposes, and he refuses to have any of this in > the stable API. Constant dripping wears away the stone. ;-) I've discussed with edson we will add top level attributes back in, and just deal with deprecating the methods when the time comes. So that that you can list the packages, get the rules, functions and type declarations for those packages. We will not be exposing internal rule constructs like patterns, constraints etc as public supported apis. Although others are welcome to document and use then, on the caveat that they understand they may change on any release. It's not that I don't think it's a legitimate request, I think it's perfectly valid. It's simply that we cannot be tied down to an internal model, we need to be free to change that. However users who code against those internal models will cry havoc if we change them, if the think they are public apis. Mark > > -W > > > On 17/02/2012, Mark Proctor&lt;mproctor(a)codehaus.org&gt; wrote: >> On 17/02/2012 05:37, GPatel(a)tsys.com wrote: >>> I need it at rule definition time, or when the rule is saved. Could >>> you point me to a starting place in the internal api ? >> take a look in drools-compiler and org.drools.lang.RuleParserTest. >> >> Mark >>> Thanks >>> G. Patel >>> > > package whatever; > > import java.io.PrintStream; > import java.util.Formatter; > import java.util.HashMap; > import java.util.HashSet; > import java.util.List; > import java.util.Map; > import java.util.Set; > > import org.drools.KnowledgeBase; > import org.drools.base.ClassObjectType; > import org.drools.definition.KnowledgePackage; > import org.drools.definitions.impl.KnowledgePackageImp; > import org.drools.rule.Accumulate; > import org.drools.rule.Collect; > import org.drools.rule.EntryPoint; > import org.drools.rule.EvalCondition; > import org.drools.rule.Forall; > import org.drools.rule.From; > import org.drools.rule.GroupElement; > import org.drools.rule.Pattern; > import org.drools.rule.Rule; > import org.drools.spi.ObjectType; > > public class RulesByClasses { > private Formatter fmt; > private String ruleName; > private String packageName; > private Map<String,Set<String>> class2rules; > > public RulesByClasses( PrintStream printStream ){ > fmt = new Formatter( printStream ); > } > > public RulesByClasses(){ > this( System.out ); > } > > private void register( String className ){ > Set<String> ruleSet = class2rules.get( className ); > if( ruleSet == null ){ > ruleSet = new HashSet<String>(); > class2rules.put( className, ruleSet ); > } > ruleSet.add( "\"" + ruleName + "\" in " + packageName ); > } > > private void inspectCollect( Collect collect ){ > inspectPattern( collect.getSourcePattern() ); > inspectNestedElements( collect.getNestedElements() ); > } > > private void inspectAccumulate( Accumulate accumulate ){ > inspectNestedElements( accumulate.getNestedElements() ); > } > > private void inspectFrom( From from ){ > inspectNestedElements( from.getNestedElements() ); > } > > private void inspectNestedElements( List<?> nested ){ > for( Object o: nested ){ > if( o instanceof Pattern ){ > inspectPattern( (Pattern)o ); > } else if( o instanceof GroupElement ){ > inspectGroupElement( (GroupElement)o ); > } else if( o instanceof Forall ){ > inspectForall( (Forall)o ); > } else if( o instanceof Collect ){ > inspectCollect( (Collect)o ); > } else if( o instanceof Accumulate ){ > inspectAccumulate( (Accumulate)o ); > } else if( o instanceof From ){ > inspectFrom( (From)o ); > } else if( o instanceof EntryPoint ){ > //... > } else { > throw new IllegalStateException( "unexpected CE " + o.getClass() ); > } > } > } > > private void inspectPattern( Pattern pattern ){ > ObjectType objectType = pattern.getObjectType(); > if( objectType instanceof ClassObjectType ){ > ClassObjectType classObjectType = (ClassObjectType)objectType; > register( classObjectType.getClassName() ); > } > inspectNestedElements( pattern.getNestedElements() ); > } > > private void inspectForall( Forall forall ){ > inspectNestedElements( forall.getNestedElements() ); > } > > private void inspectGroupElement( GroupElement groupElement ){ > for( Object o: groupElement.getChildren() ){ > if( o instanceof Pattern ){ > inspectPattern( (Pattern)o ); > } else if( o instanceof GroupElement ){ > inspectGroupElement( (GroupElement)o ); > } else if( o instanceof Forall ){ > inspectForall( (Forall)o ); > } else if( o instanceof EvalCondition ){ > // ... > } else { > throw new IllegalStateException( "unexpected CE " + o.getClass() ); > } > } > } > > private void inspect( KnowledgePackage kPackage ){ > packageName = kPackage.getName(); > for( org.drools.definition.rule.Rule ruleCopy: kPackage.getRules() ){ > ruleName = ruleCopy.getName(); > Rule rule = (Rule)((KnowledgePackageImp)kPackage).getRule( ruleName ); > inspectGroupElement( rule.getLhs() ); > } > } > > private void emit(){ > for( Map.Entry<String,Set<String>> entry: class2rules.entrySet() ){ > fmt.format( "Class %s%n", entry.getKey() ); > for( String ruleNamePack: entry.getValue() ){ > fmt.format( " %s%n", ruleNamePack ); > } > } > } > > public void print( KnowledgePackage kPackage ){ > class2rules = new HashMap<String,Set<String>>(); > inspect( kPackage ); > emit(); > } > > public void print( KnowledgeBase kBase ){ > class2rules = new HashMap<String,Set<String>>(); > for( KnowledgePackage kPackage: kBase.getKnowledgePackages() ){ > inspect( kPackage ); > } > emit(); > } > } > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users