2:55 p.m.
Hello all,
I'm getting a NullPointerException when calling
org.kie.api.definition.type.FactType.set(Object, String, Object) and also when I call
org.kie.api.definition.type.FactType.setFromMap(Object, Map<String, Object>). The
exception stack trace points to the same line in both cases:
Exception in thread "main" java.lang.NullPointerException
at org.drools.core.factmodel.ClassDefinition.set(ClassDefinition.java:255)
...
Doing some debugging, I found that the getFieldAccessor() call in
org.drools.core.factmodel.ClassDefinition, line 255, is returning null, which is
what's causing this. I didn't dig deeper than that, though.
I created the data model in Drools Workbench 6.0.1 final and I've double-checked that
the field I'm passing in to set a value exists on the object. Below is my code and
it's throwing the NPE on the last line.
I'm going to try to use standard Java reflection instead for now, but any assistance
on this would be appreciated. I can provide any other code, the KieModule JAR produced by
Workbench, or anything else, if needed.
KieServices ks = KieServices.Factory.get();
KieContainer kContainer =
ks.newKieContainer(ks.newReleaseId("com.hp.pa.sample", "realestate",
"LATEST"));
KieSession kSession = kContainer.newKieSession();
KieBase kBase = kSession.getKieBase();
FactType agentAssignmentType =
kBase.getFactType("com.hp.pa.sample.realestate",
"AgentAssignmentData");
FactType property4SaleType =
kBase.getFactType("com.hp.pa.sample.realestate", "PropertyForSale");
if (agentAssignmentType == null || property4SaleType == null)
System.err.println("Could not find a FactType");
Object agentAssignment = null;
Object property4Sale = null;
try {
agentAssignment = agentAssignmentType.newInstance();
property4Sale = property4SaleType.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
property4SaleType.set(property4Sale, "city", "San Diego");
Thank you,
Ronak Patel
Software Designer
HP Autonomy
3:08 p.m.
Data Modeller generates Java classes in 6.x whereas we generated DRL
Declarative Types before.
The getFactType() API is for manipulating declared types. Java's standard
Reflection API is for manipulating Java classes.
Sent on the move
On 6 May 2014 20:57, "Patel, Ronak (Autonomy)" <ronak.patel(a)hp.com>
wrote:
Hello all,
I’m getting a NullPointerException when calling
org.kie.api.definition.type.FactType.set(Object, String, Object) and also
when I call org.kie.api.definition.type.FactType.setFromMap(Object,
Map<String, Object>). The exception stack trace points to the same line in
both cases:
Exception in thread "main" *java.lang.NullPointerException*
at org.drools.core.factmodel.ClassDefinition.set(
*ClassDefinition.java:255*)
...
Doing some debugging, I found that the getFieldAccessor() call in
org.drools.core.factmodel.ClassDefinition, line 255, is returning null,
which is what’s causing this. I didn’t dig deeper than that, though.
I created the data model in Drools Workbench 6.0.1 final and I’ve
double-checked that the field I’m passing in to set a value exists on the
object. Below is my code and it’s throwing the NPE on the last line.
I’m going to try to use standard Java reflection instead for now, but any
assistance on this would be appreciated. I can provide any other code, the
KieModule JAR produced by Workbench, or anything else, if needed.
KieServices ks = KieServices.Factory.*get*();
KieContainer kContainer = ks.newKieContainer(ks.newReleaseId(
"com.hp.pa.sample", "realestate", "LATEST"));
KieSession kSession = kContainer.newKieSession();
KieBase kBase = kSession.getKieBase();
FactType agentAssignmentType = kBase.getFactType(
"com.hp.pa.sample.realestate", "AgentAssignmentData");
FactType property4SaleType = kBase.getFactType(
"com.hp.pa.sample.realestate", "PropertyForSale");
*if* (agentAssignmentType == *null* || property4SaleType == *null*
)
System.*err*.println("Could not find a FactType");
Object agentAssignment = *null*;
Object property4Sale = *null*;
*try* {
agentAssignment = agentAssignmentType.newInstance();
property4Sale = property4SaleType.newInstance();
} *catch* (InstantiationException e) {
e.printStackTrace();
} *catch* (IllegalAccessException e) {
e.printStackTrace();
}
property4SaleType.set(property4Sale, "city", "San Diego");
Thank you,
*Ronak Patel *Software Designer
HP Autonomy
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rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
3:22 p.m.
New subject: NullPointerException when calling FactType.set and FactType.setFromMap
Ah, OK, thanks for the clarification. I'll give the Java Reflection API a try with
this in that case.
On May 6, 2014, at 1:10 PM, "Michael Anstis"
<michael.anstis@gmail.com<mailto:michael.anstis@gmail.com>> wrote:
Data Modeller generates Java classes in 6.x whereas we generated DRL Declarative Types
before.
The getFactType() API is for manipulating declared types. Java's standard Reflection
API is for manipulating Java classes.
Sent on the move
On 6 May 2014 20:57, "Patel, Ronak (Autonomy)"
<ronak.patel@hp.com<mailto:ronak.patel@hp.com>> wrote:
Hello all,
I’m getting a NullPointerException when calling
org.kie.api.definition.type.FactType.set(Object, String, Object) and also when I call
org.kie.api.definition.type.FactType.setFromMap(Object, Map<String, Object>). The
exception stack trace points to the same line in both cases:
Exception in thread "main" java.lang.NullPointerException
at org.drools.core.factmodel.ClassDefinition.set(ClassDefinition.java:255)
...
Doing some debugging, I found that the getFieldAccessor() call in
org.drools.core.factmodel.ClassDefinition, line 255, is returning null, which is what’s
causing this. I didn’t dig deeper than that, though.
I created the data model in Drools Workbench 6.0.1 final and I’ve double-checked that the
field I’m passing in to set a value exists on the object. Below is my code and it’s
throwing the NPE on the last line.
I’m going to try to use standard Java reflection instead for now, but any assistance on
this would be appreciated. I can provide any other code, the KieModule JAR produced by
Workbench, or anything else, if needed.
KieServices ks = KieServices.Factory.get();
KieContainer kContainer =
ks.newKieContainer(ks.newReleaseId("com.hp.pa.sample", "realestate",
"LATEST"));
KieSession kSession = kContainer.newKieSession();
KieBase kBase = kSession.getKieBase();
FactType agentAssignmentType =
kBase.getFactType("com.hp.pa.sample.realestate",
"AgentAssignmentData");
FactType property4SaleType =
kBase.getFactType("com.hp.pa.sample.realestate", "PropertyForSale");
if (agentAssignmentType == null || property4SaleType == null)
System.err.println("Could not find a FactType");
Object agentAssignment = null;
Object property4Sale = null;
try {
agentAssignment = agentAssignmentType.newInstance();
property4Sale = property4SaleType.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
property4SaleType.set(property4Sale, "city", "San Diego");
Thank you,
Ronak Patel
Software Designer
HP Autonomy
_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
3884
days inactive
3884
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2 comments
2 participants
participants (2)
-
Michael Anstis -
Patel, Ronak (Autonomy)