<br> Michael,<br><br> The problem is you missed the "" on:<br><br><p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result.addPassedRule(leaders in same
location);</span></font></p>
<font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"><br> I will fix the parser code to not throw NPE for this anymore.<br><br> Thanks,<br> Edson<br></span></font>
<br><div><span class="gmail_quote">2007/10/31, Michael Fuller <<a href="mailto:mfuller@ihets.org">mfuller@ihets.org</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="blue" lang="EN-US">
<div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Sure. Thanks</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">package validActions;</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">import myPackage.domain.leader.LeaderImpl;</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">import
myPackage.domain.location.LocationImpl;</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">import
myPackage.domain.leader.LeaderTypeImpl;</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">import
myPackage.rivoli.service.rules.RuleResult;</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">rule "leaders in same location"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">salience 10</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">when</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result : RuleResult(rulesPassed not
contains "leaders in same location")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $loc : LocationImpl()</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leaderName : String()</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leader1 : LeaderImpl(name ==
$leaderName, location == $loc)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leader2 : LeaderImpl(name !=
$leaderName, this != $leader1, location == $loc)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">then</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result.addPassedRule(leaders in same
location);</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> update($result);</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">end</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">rule "leaders king and heir"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">salience 10</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">when</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result : RuleResult(rulesPassed not
contains "leaders king and heir")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leaderName : String()</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $king : LeaderTypeImpl(name ==
"King")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $heir : LeaderTypeImpl(name ==
"Heir")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leader1 : LeaderImpl(name ==
$leaderName, leaderType == $king)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leader2 : LeaderImpl(name !=
$leaderName, this != $leader1, leaderType == $heir)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">then</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result.addPassedRule("leaders
king and heir");</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> update($result);</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">end</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">rule "leader in capital"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">salience 10</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">when</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result : RuleResult(rulesPassed not
contains "leader in capital")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $loc : LocationImpl(capital == true)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leader1 : LeaderImpl(location ==
$loc)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">then</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result.addPassedRule("leader in
capital");</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> update($result);</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">end</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">rule "leader in homeland"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">salience 10</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">when</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result : RuleResult(rulesPassed not
contains "leader in homeland")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $loc : LocationImpl(homeland == true)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $leader1 : LeaderImpl(location ==
$loc)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">then</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result.addPassedRule("leader in
homeland");</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> update($result);</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">end</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">rule "abdication allowed"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">when</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result : RuleResult (rulesPassed not
contains "abdication allowed"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> && rulesPassed
contains "leaders in same location"</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> && rulesPassed
contains "leaders king and heir")</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">then</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> $result.addPassedRule("abdication
allowed");</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> update($result);</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">end</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div>
<div style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
<hr align="center" size="2" width="100%">
</span></font></div>
<p><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">rules-users-bounces@lists.jboss.org</a> [mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
rules-users-bounces@lists.jboss.org</a>]
<b><span style="font-weight: bold;">On Behalf Of </span></b>Edson Tirelli<br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, October 30, 2007
2:31 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Rules Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] RE:
JavaConsequenceBuilder.buildNullPointerException</span></font></p>
</div><div><span class="e" id="q_115f669f1ba06e10_1">
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> Michael,<br>
<br>
Can you show us your rule(s) please? it is raising the NPE when
trying to get the list of variables you use in the consequence... as soon as we
determine what the real problem is, I can fix the error message... <br>
<br>
[]s<br>
Edson</span></font></p>
<div>
<p><span><font face="Times New Roman" size="3"><span style="font-size: 12pt;">2007/10/30, Michael Fuller
<<a href="mailto:mfuller@ihets.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">mfuller@ihets.org</a>>:</span></font></span></p>
<div link="blue" vlink="purple">
<div>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I
have the following code: (note String[] ruleFiles contains only one string)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">public
class Engine {</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
private static RuleBase ruleBase;</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
public void start(String[] ruleFiles) throws Exception {</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
PackageBuilderConfiguration cfg = new PackageBuilderConfiguration();</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
JavaDialectConfiguration javaConf = (JavaDialectConfiguration)
cfg.getDialectConfiguration("java");</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
javaConf.setCompiler(JavaDialectConfiguration.ECLIPSE);</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
PackageBuilder builder = new PackageBuilder(cfg);</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
for (String file : ruleFiles) {</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
builder.addPackageFromDrl(new
InputStreamReader(ClassLoader.getSystemResourceAsStream(file)));</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
}</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
Package pkg = builder.getPackage();</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
PackageBuilderErrors errors = builder.getErrors();</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
if (errors.getErrors().length != 0) {</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
// do something</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
}</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
RuleBaseConfiguration conf = new RuleBaseConfiguration();</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
conf.setAssertBehaviour(RuleBaseConfiguration.AssertBehaviour.EQUALITY);</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
ruleBase = RuleBaseFactory.newRuleBase();</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
ruleBase.addPackage(pkg);</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
ruleBase.newStatefulSession(false);</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
}</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">}</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">At
the builder.addPackageFromDrl(new
InputStreamReader(ClassLoader.getSystemResourceAsStream(file))); line I'm
getting the following exception:</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">java.lang.NullPointerException</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at
org.drools.rule.builder.dialect.java.JavaConsequenceBuilder.build(JavaConsequenceBuilder.java:54)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:67)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at myPackage.rivoli.service.rules.Engine.start(Engine.java:33)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at
myPackage.rivoli.rules.LeaderKingAndHeirTest.setUp(LeaderKingAndHeirTest.java:26)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:40)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I
am using Drools 4.0.3</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I
have the following jars in my class path:</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">antlr-runtime-3.0.jar
</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">core-3.2.3.v_686_R32x.jar</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">drools-compiler-4.0.3.jar</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">drools-core-4.0.3.jar</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">mvel14-1.2.10.jar</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Any
ideas would be helpful. Thanks.</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Michael Fuller</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">"In
theory there is no difference between theory and practice. But, in practice,
there is." - Jan L.A. van de Snepscheut</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
</div>
</div>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
_______________________________________________<br>
rules-users mailing list<br>
<a href="mailto:rules-users@lists.jboss.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">rules-users@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">https://lists.jboss.org/mailman/listinfo/rules-users</a></span></font></p>
</div>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
<br clear="all">
<br>
-- <br>
Edson Tirelli<br>
Software Engineer - JBoss Rules Core Developer<br>
Office: +55 11 3529-6000<br>
Mobile: +55 11 9287-5646 <br>
JBoss, a division of Red Hat @ <a href="http://www.jboss.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">www.jboss.com</a>
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<br>_______________________________________________<br>rules-users mailing list<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br><a onclick="return top.js.OpenExtLink(window,event,this)" href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">
https://lists.jboss.org/mailman/listinfo/rules-users</a><br><br></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> Software Engineer - JBoss Rules Core Developer<br> Office: +55 11 3529-6000<br> Mobile: +55 11 9287-5646
<br> JBoss, a division of Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a>