[jboss-jira] [JBoss JIRA] Commented: (JBRULES-746) NPE when dumping XML

[Edson Tirelli (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBRULES-746?page=comments#action_12356926 ] 
            
Edson Tirelli commented on JBRULES-746:
---------------------------------------

   Your rule is correct. The way to check for nulls is exactly like you did:

item : ItemVo( itemStatusCode == null)
 
   This seems to be an XMLDumper problem.


> NPE when dumping XML
> --------------------
>
>                 Key: JBRULES-746
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-746
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Drl Parser/Builder
>    Affects Versions: 3.1-m1
>            Reporter: Edson Tirelli
>         Assigned To: Edson Tirelli
>             Fix For: 3.1-m2
>
>
> REPORTED BY SANJAY SINGH
> ---------------------------------------------
> What is wrong with this drl file ? When i try to create a xml out of it .. it keeps on failing on me .. while testing things out the rule works just fine .. its just the XmlDumper class which throws exception (InvocationTarget) .. Anybody else tried to generate xmls from drl files .. there are not many examples for the latest syntax of XML so i thought to create the DRL's first and then generate XML's off them .. but a very basic Drl failing is just killing my enthusiasm to go on with drools ..
> DRL
> package com.walmart.itemfile.item.rules
> import com.walmart.itemfile.item.vo.ItemVo;
> import com.walmart.itemfile.item.dao.ItemDao;
> import com.walmart.itemfile.item.dao.ItemValidationDao;
> import java.lang.String;
> global com.walmart.itemfile.item.dao.ItemValidationDao itemValidationDao;
> global com.walmart.itemfile.rules.ValidationErrorMap errors;
> rule "Item status sode cannot be null"
>         when
>                 item : ItemVo(itemStatusCode == null)
>         then
>                 errors.addValidationError("nullItemStatusCode","Item Status Code is null");
>                 System.out.println("Item Status Code is " + item.getItemStatusCode());
> end
> JAVA
>                         DrlParser parser = new DrlParser();
>                 final PackageDescr pkgOriginal = parser.parse( new InputStreamReader( getClass().getResourceAsStream( "testRules.drl" ) ) );
>                 final XmlDumper dumper = new XmlDumper();
>                 final String result = dumper.dump( pkgOriginal );
> EXCEPTION 
> ...
> Caused by: java.lang.NullPointerException
>         at org.drools.xml.XmlDumper.replaceIllegalChars(XmlDumper.java:309)
>         at org.drools.xml.XmlDumper.visitLiteralRestrictionDescr(XmlDumper.java:136)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
>         at java.lang.reflect.Method.invoke(Method.java:391)
>         at org.drools.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:41)
>         at org.drools.xml.XmlDumper.processFieldConstraint(XmlDumper.java:216)
>         at org.drools.xml.XmlDumper.visitFieldConstraintDescr(XmlDumper.java:102) 
> ...

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