[jboss-jira] [JBoss JIRA] Assigned: (JBRULES-854) I have following problem with null valuated string properties

[Edson Tirelli (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-854?page=all ]

Edson Tirelli reassigned JBRULES-854:
-------------------------------------

    Assignee: Edson Tirelli  (was: Mark Proctor)

> I have following problem with null valuated string properties
> -------------------------------------------------------------
>
>                 Key: JBRULES-854
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-854
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Reteoo
>    Affects Versions: 4.0.0.MR2
>         Environment: Windows XP SP2
>            Reporter: Vesa Tuononen
>         Assigned To: Edson Tirelli
>            Priority: Blocker
>
> I have very simple object with PropertyChangeSupport. 
> Java code listed bellow object and test method:
> import java.beans.PropertyChangeListener;
> import java.beans.PropertyChangeSupport;
> import java.io.InputStreamReader;
> import org.drools.RuleBase;
> import org.drools.RuleBaseFactory;
> import org.drools.StatefulSession;
> import org.drools.compiler.DroolsParserException;
> import org.drools.compiler.PackageBuilder;
> public class OwnTest{
> 	public static class Row{
> 		private final PropertyChangeSupport changes  = new PropertyChangeSupport( this );
> 		private String field1;
> 		private String field2;
> 		
> 		public Row(){}
> 		
> 		public String getField1() {
> 			return field1;
> 		}
> 		public void setField1(String field1) {
> 			String oldField1 = this.field1;
> 			this.field1 = field1;
> 	        this.changes.firePropertyChange( "field1",
> 	        		oldField1,
>                     this.field1 );
> 		}
> 		public String getField2() {
> 			return field2;
> 		}
> 		public void setField2(String field2) {
> 			String oldField2 = this.field2;
> 			this.field2 = field2;
> 	        this.changes.firePropertyChange( "field2",
> 	        		oldField2,
>                     this.field2 );
> 		}
> 		
> 	    public void addPropertyChangeListener(final PropertyChangeListener l) {
> 	        this.changes.addPropertyChangeListener( l );
> 	    }
> 	    public void removePropertyChangeListener(final PropertyChangeListener l) {
> 	        this.changes.removePropertyChangeListener( l );
> 	    }
> 	}
> 	/**
> 	 * @param args
> 	 * @throws Exception 
> 	 * @throws DroolsParserException 
> 	 * @throws Exception 
> 	 */
> 	public static void main(String[] args) throws Exception {
>         Row r = new Row();
>         r.setField1(null);
>         r.setField2(null);
>         PackageBuilder builder = new PackageBuilder();
> 		builder.addPackageFromXml(new InputStreamReader( OwnTest.class.getResourceAsStream("rule.xml")));
>         RuleBase ruleBase = RuleBaseFactory.newRuleBase();
>         ruleBase.addPackage( builder.getPackage() );
>         StatefulSession workingMemory = ruleBase.newStatefulSession();    
>         workingMemory.assertObject(r, true);
>         workingMemory.fireAllRules();
> 	}
> }
> and rule.xml
> <?xml version="1.0" encoding="UTF-8"?> 
>  <package name="test"  
> 	xmlns="http://drools.org/drools-3.0" 
> 	xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" 
> 	xs:schemaLocation="http://drools.org/drools-3.0 drools-3.0.xsd"> 
> <import name="OwnTest.Row"/> 
> <rule name="1">
> <lhs>
> <pattern object-type="Row">
>    <field-constraint field-name="field1"> 
>    <literal-restriction evaluator="==" value="1" />
>    </field-constraint>
> </pattern>
> </lhs>
> <rhs>
> System.out.println("--"+input.getField1());
> input.setField1("2");
> </rhs>
> </rule>
> <rule name="2">
> <lhs>
> <pattern identifier="input" object-type="Row">
>    <field-constraint field-name="field1"> 
>    <literal-restriction evaluator="==" value="2" />
>     </field-constraint>
> </pattern>
> </lhs>
> <rhs>
> System.out.println("--"+input.getField1());
> input.setField1("3");
> </rhs>
> </rule>
> <rule name="3">
> <lhs>
> <pattern identifier="input" object-type="Row">
>    <field-constraint field-name="field1"> 
>    <literal-restriction evaluator="==" value="3" />
>     </field-constraint>
> </pattern>
> </lhs>
> <rhs>
> System.out.println("--"+input.getField1());
> input.setField1("4");
> </rhs>
> </rule>
> <rule name="4">
> <lhs>
> <pattern identifier="input" object-type="Row">
>    <field-constraint field-name="field1"> 
>    <literal-restriction evaluator="==" value="4" />
>     </field-constraint>
> </pattern>
> </lhs>
> <rhs>
> System.out.println("--"+input.getField1());
> input.setField1("0");
> input.setField2("5");
> </rhs>
> </rule>
> <rule name="5">
> <lhs>
> <pattern identifier="input" object-type="Row">
>    <field-constraint field-name="field2"> 
>    <literal-restriction evaluator="==" value="2" />
>     </field-constraint>
> </pattern>
> </lhs>
> <rhs>
> System.out.println("--"+input.getField1());
> System.out.println("--"+input.getField2());
> input.setField2("2b");
> </rhs>
> </rule>
> </package>
> with this rule set I get following StackTrace:
> Exception in thread "main" java.lang.NullPointerException
> 	at org.drools.reteoo.CompositeObjectSinkAdapter$HashKey.setValue(CompositeObjectSinkAdapter.java:478)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:292)
> 	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:183)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:121)
> 	at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:201)
> 	at org.drools.reteoo.ReteooWorkingMemory.doAssertObject(ReteooWorkingMemory.java:70)
> 	at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:724)
> 	at org.drools.common.AbstractWorkingMemory.assertObject(AbstractWorkingMemory.java:568)
> but if I remove some rules everything works fine.

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