[rules-dev] LiteralRestriction NPE

[David Sinclair]

Found a NullPointerException when using the verifier module.
LiteralRestriction.setValue blows chunks, when the value is null. It sucks
that Double.parseDouble doesn't behave the same as Integer.parseInt which
handles nulls.

java.lang.NullPointerException
    at
sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:991)
    at java.lang.Double.parseDouble(Double.java:510)
    at
org.drools.verifier.components.LiteralRestriction.setValue(LiteralRestriction.java:128)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:688)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:123)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:572)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:562)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:119)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:482)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:183)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:529)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:113)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:482)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:410)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:111)
    at
org.drools.verifier.PackageDescrFlattener.flatten(PackageDescrFlattener.java:389)
    at
org.drools.verifier.PackageDescrFlattener.addPackageDescrToData(PackageDescrFlattener.java:96)
    at org.drools.verifier.Verifier.addPackageDescr(Verifier.java:32)
    at
com.sungard.cmdb.generator.RuleGenerator.createValidationPackage(RuleGenerator.java:370)
    at
com.sungard.cmdb.generator.RuleGenerator.generateCode(RuleGenerator.java:273)
    at
com.sungard.cmdb.generator.JarBasedCodeGenerator.main(JarBasedCodeGenerator.java:156)
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