11:02 a.m.
Hi list,
I feel this should be an elementary question but unfortunately I haven't
been able to find a solution.
I would like to perform date arithmetic in the when part of a rule.
For example, I would like to express something like:
rule "Date compare rule"
dialect "mvel"
when
a : A()
b : B( a.creationDate <= b.creationDate after 3 months)
then
...
end
Apart from using eval()'s is there any other way to express these types of
comparisons?
Thank you for your time,
-Stathis
12:38 p.m.
See the "Fusion" manual, section on Temporal Reasoning/Temporal Operators.
Even when the facts aren't events, these operators can still be applied to
fields of type Date, e.g.
$p1: Person( $dob1: dob )
$p2: Person( $dob2: dob after[3d] $dob1 )
-W
On 28 June 2011 18:02, <rouvas(a)mm.di.uoa.gr> wrote:
Hi list,
I feel this should be an elementary question but unfortunately I haven't
been able to find a solution.
I would like to perform date arithmetic in the when part of a rule.
For example, I would like to express something like:
rule "Date compare rule"
dialect "mvel"
when
a : A()
b : B( a.creationDate <= b.creationDate after 3 months)
then
...
end
Apart from using eval()'s is there any other way to express these types of
comparisons?
Thank you for your time,
-Stathis
_______________________________________________
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rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
6:04 p.m.
Interesting. I tried to use this syntax to find out if a date is older than
"now" using this source:
$p2: Person( $dob2: dob before[3d] new Date() )
but I get and exception: org.drools.RuntimeDroolsException: The 'before'
operator can only be used to compare one event to another, and never to
compare to literal constraints.
any idea how to compare to "new Date()"? I had already written a function
to do this date comparison, but will use the Drools syntax instead if I can
get this to work.
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2:20 a.m.
Currently (5.2.0, but not <= 5.1.1) you can do:
rule future
when
Date( $t: time ) from new Date()
$p: Person( $dob: dob after[0] $t )
then
System.out.println( $p.getName() + " not born yet." );
end
There are indeed some restrictions w.r.t. the use of temporal operators but
comparing Date/long field to Date/long field is OK.
(@Lisa: You realize that new Date() is somewhat unprecise when used to mean
"today".)
-W
On 29 June 2011 01:04, lhorton <LHorton(a)abclegal.com> wrote:
Interesting. I tried to use this syntax to find out if a date is
older
than
"now" using this source:
$p2: Person( $dob2: dob before[3d] new Date() )
but I get and exception: org.drools.RuntimeDroolsException: The 'before'
operator can only be used to compare one event to another, and never to
compare to literal constraints.
any idea how to compare to "new Date()"? I had already written a function
to do this date comparison, but will use the Drools syntax instead if I can
get this to work.
--
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11:34 a.m.
Thanks! I converted over to these and my tests are all passing so far.
Examples (snippets):
// > one day old
when
$step : Step(status == Status.ACTIVE, task.job.statuteOfLimitationsDate !=
null)
Date($now : time) from Calendar.getInstance().getTime()
Date($solDate : time before[1d] $now) from
$step.task.job.statuteOfLimitationsDate
// > 13 hours old
when
$step : Step(status == Status.ACTIVE)
Date($now : time) from Calendar.getInstance().getTime()
$checkpointTO : ArrayList(size > 0) from collect (cp : CheckPoint(type ==
CheckPointType.ABCOffice, created before[13h] $now) from
$step.getCheckPoints() )
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1:16 p.m.
I am getting runtime exception with these temporal operator changes when I
compile the knowledge base using a knowledge agent. If I compile the drl
using:
KnowledgeBuilder kb = KnowledgeBuilderFactory.newKnowledgeBuilder();
kb.add(ResourceFactory.newFileResource(path), ResourceType.DRL); // path
is the .drl file
if (kb.hasErrors()) {
System.out.println(kb.getErrors().toString());
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kb.getKnowledgePackages());
and create a stateless knowledge session using the kbase, then at runtime I
do not get any errors.
however, if I build the knowledge base using:
agent = KnowledgeAgentFactory.newKnowledgeAgent(agentName);
agent.applyChangeSet(ResourceFactory.newClassPathResource(path)); // path
is to change set including only the above .drl file
return agent.getKnowledgeBase();
the package compiles, but at runtime, the same tests that worked fine for
the KnowledgeBuilder package instead get a NPE:
java.lang.NullPointerException
at
org.drools.base.evaluators.BeforeEvaluatorDefinition$BeforeEvaluator.evaluateCachedLeft(BeforeEvaluatorDefinition.java:347)
at
org.drools.rule.VariableRestriction.isAllowedCachedLeft(VariableRestriction.java:115)
at
org.drools.rule.VariableConstraint.isAllowedCachedLeft(VariableConstraint.java:115)
at
org.drools.common.SingleBetaConstraints.isAllowedCachedLeft(SingleBetaConstraints.java:127)
at
org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:269)
at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:133)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:232)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:91)
at
org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:274)
at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:133)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:232)
at
org.drools.reteoo.CompositeLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:118)
at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:154)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:193)
at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:191)
at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:332)
at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:293)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)
at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:255)
at
org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:303)
at
com.abclegal.rules.AbstractRulesUnit.executeWorkflow(AbstractRulesUnit.java:215)
at
com.abclegal.rules.RulesApplyInstructionUnit.testFileAtCourtCheckpointToWithOldDate(RulesApplyInstructionUnit.java:73)
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7:41 p.m.
Thanks for the quick reply.
I forgot to mention that I'm using 5.0.1, but I'll look at the Fusion
manual for more info.
-Stathis
Wolfgang Laun wrote:
See the "Fusion" manual, section on Temporal
Reasoning/Temporal Operators.
Even when the facts aren't events, these operators can still be applied to
fields of type Date, e.g.
$p1: Person( $dob1: dob )
$p2: Person( $dob2: dob after[3d] $dob1 )
-W
On 28 June 2011 18:02, <rouvas(a)mm.di.uoa.gr> wrote:
> Hi list,
>
> I feel this should be an elementary question but unfortunately I haven't
> been able to find a solution.
>
> I would like to perform date arithmetic in the when part of a rule.
>
> For example, I would like to express something like:
>
> rule "Date compare rule"
> dialect "mvel"
> when
> a : A()
> b : B( a.creationDate <= b.creationDate after 3 months)
> then
> ...
> end
>
> Apart from using eval()'s is there any other way to express these types
> of
> comparisons?
>
> Thank you for your time,
> -Stathis
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
1:15 p.m.
What are the available symbolics for temporal values?
That is, d is for days, m is for minutes, h is for hours, s is for seconds.
Are there any other symbolics specifically for months and years?
I haven't found any mentioning of them in the Fusion manual.
I'm using 5.0.1
Thank you,
-Stathis
Wolfgang Laun wrote:
See the "Fusion" manual, section on Temporal
Reasoning/Temporal Operators.
Even when the facts aren't events, these operators can still be applied to
fields of type Date, e.g.
$p1: Person( $dob1: dob )
$p2: Person( $dob2: dob after[3d] $dob1 )
-W
On 28 June 2011 18:02, <rouvas(a)mm.di.uoa.gr> wrote:
> Hi list,
>
> I feel this should be an elementary question but unfortunately I haven't
> been able to find a solution.
>
> I would like to perform date arithmetic in the when part of a rule.
>
> For example, I would like to express something like:
>
> rule "Date compare rule"
> dialect "mvel"
> when
> a : A()
> b : B( a.creationDate <= b.creationDate after 3 months)
> then
> ...
> end
>
> Apart from using eval()'s is there any other way to express these types
> of
> comparisons?
>
> Thank you for your time,
> -Stathis
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
12:21 a.m.
2011/6/30 <rouvas(a)mm.di.uoa.gr>
What are the available symbolics for temporal values?
That is, d is for days, m is for minutes, h is for hours, s is for seconds.
Are there any other symbolics specifically for months and years?
You can use ms for millisecond. There are no universally acceptable duration
values for monts and years .
-W
I haven't found any mentioning of them in the Fusion manual.
I'm using 5.0.1
Thank you,
-Stathis
Wolfgang Laun wrote:
> See the "Fusion" manual, section on Temporal Reasoning/Temporal
Operators.
> Even when the facts aren't events, these operators can still be applied
to
> fields of type Date, e.g.
>
> $p1: Person( $dob1: dob )
> $p2: Person( $dob2: dob after[3d] $dob1 )
>
> -W
>
>
> On 28 June 2011 18:02, <rouvas(a)mm.di.uoa.gr> wrote:
>
>> Hi list,
>>
>> I feel this should be an elementary question but unfortunately I haven't
>> been able to find a solution.
>>
>> I would like to perform date arithmetic in the when part of a rule.
>>
>> For example, I would like to express something like:
>>
>> rule "Date compare rule"
>> dialect "mvel"
>> when
>> a : A()
>> b : B( a.creationDate <= b.creationDate after 3 months)
>> then
>> ...
>> end
>>
>> Apart from using eval()'s is there any other way to express these types
>> of
>> comparisons?
>>
>> Thank you for your time,
>> -Stathis
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
1:04 a.m.
The times attempt to be ISO8601 compliant, for Hours and earlier.
Although I noticed that tidbit of information is missing for the docs,
we'll get it added. See TimeUtils
private static final Pattern SIMPLE = Pattern.compile(
"([+-])?((\\d+)[Dd])?\\s*((\\d+)[Hh])?\\s*((\\d+)[Mm])?\\s*((\\d+)[Ss])?\\s*((\\d+)([Mm][Ss])?)?"
);
public static long parseTimeString( String time ) {
String trimmed = time.trim();
long result = 0;
if( trimmed.length() > 0 ) {
Matcher mat = SIMPLE.matcher( trimmed );
if ( mat.matches() ) {
int days = (mat.group( SIM_DAY ) != null) ?
Integer.parseInt( mat.group( SIM_DAY ) ) : 0;
int hours = (mat.group( SIM_HOU ) != null) ?
Integer.parseInt( mat.group( SIM_HOU ) ) : 0;
int min = (mat.group( SIM_MIN ) != null) ?
Integer.parseInt( mat.group( SIM_MIN ) ) : 0;
int sec = (mat.group( SIM_SEC ) != null) ?
Integer.parseInt( mat.group( SIM_SEC ) ) : 0;
int ms = (mat.group( SIM_MS ) != null) ?
Integer.parseInt( mat.group( SIM_MS ) ) : 0;
long r = days * DAY_MS + hours * HOU_MS + min * MIN_MS
+ sec * SEC_MS + ms;
if( mat.group(SIM_SGN) != null && mat.group( SIM_SGN
).equals( "-" ) ) {
r = -r;
}
result = r;
} else if( "*".equals( trimmed ) || "+*".equals( trimmed
) ) {
// positive infinity
result = Long.MAX_VALUE;
} else if( "-*".equals( trimmed ) ) {
// negative infinity
result = Long.MIN_VALUE;
} else {
throw new RuntimeDroolsException( "Error parsing time
string: [ " + time + " ]" );
}
}
return result;
}
On 01/07/2011 06:21, Wolfgang Laun wrote:
2011/6/30 <rouvas(a)mm.di.uoa.gr
<mailto:rouvas@mm.di.uoa.gr>>
What are the available symbolics for temporal values?
That is, d is for days, m is for minutes, h is for hours, s is for
seconds.
Are there any other symbolics specifically for months and years?
You can use ms for millisecond. There are no universally acceptable
duration values for monts and years .
-W
I haven't found any mentioning of them in the Fusion manual.
I'm using 5.0.1
Thank you,
-Stathis
Wolfgang Laun wrote:
> See the "Fusion" manual, section on Temporal Reasoning/Temporal
Operators.
> Even when the facts aren't events, these operators can still be
applied to
> fields of type Date, e.g.
>
> $p1: Person( $dob1: dob )
> $p2: Person( $dob2: dob after[3d] $dob1 )
>
> -W
>
>
> On 28 June 2011 18:02, <rouvas(a)mm.di.uoa.gr
<mailto:rouvas@mm.di.uoa.gr>> wrote:
>
>> Hi list,
>>
>> I feel this should be an elementary question but unfortunately
I haven't
>> been able to find a solution.
>>
>> I would like to perform date arithmetic in the when part of a rule.
>>
>> For example, I would like to express something like:
>>
>> rule "Date compare rule"
>> dialect "mvel"
>> when
>> a : A()
>> b : B( a.creationDate <= b.creationDate after 3 months)
>> then
>> ...
>> end
>>
>> Apart from using eval()'s is there any other way to express
these types
>> of
>> comparisons?
>>
>> Thank you for your time,
>> -Stathis
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
_______________________________________________
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1:25 a.m.
Wolfgang Laun wrote:
2011/6/30 <rouvas(a)mm.di.uoa.gr>
> What are the available symbolics for temporal values?
> That is, d is for days, m is for minutes, h is for hours, s is for
> seconds.
> Are there any other symbolics specifically for months and years?
>
Thanks for the clarification.
You can use ms for millisecond. There are no universally acceptable
duration
values for monts and years .
Neither are the chosen values "universally" acceptable.
How about following "man date" conventions?
-Stathis
-W
>
> I haven't found any mentioning of them in the Fusion manual.
> I'm using 5.0.1
>
> Thank you,
> -Stathis
>
> Wolfgang Laun wrote:
> > See the "Fusion" manual, section on Temporal Reasoning/Temporal
> Operators.
> > Even when the facts aren't events, these operators can still be
> applied
> to
> > fields of type Date, e.g.
> >
> > $p1: Person( $dob1: dob )
> > $p2: Person( $dob2: dob after[3d] $dob1 )
> >
> > -W
> >
> >
> > On 28 June 2011 18:02, <rouvas(a)mm.di.uoa.gr> wrote:
> >
> >> Hi list,
> >>
> >> I feel this should be an elementary question but unfortunately I
> haven't
> >> been able to find a solution.
> >>
> >> I would like to perform date arithmetic in the when part of a rule.
> >>
> >> For example, I would like to express something like:
> >>
> >> rule "Date compare rule"
> >> dialect "mvel"
> >> when
> >> a : A()
> >> b : B( a.creationDate <= b.creationDate after 3 months)
> >> then
> >> ...
> >> end
> >>
> >> Apart from using eval()'s is there any other way to express these
> types
> >> of
> >> comparisons?
> >>
> >> Thank you for your time,
> >> -Stathis
> >>
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
>
>
>
4897
days inactive
4900
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10 comments
4 participants
participants (4)
-
lhorton -
Mark Proctor -
rouvas＠mm.di.uoa.gr -
Wolfgang Laun