[jboss-jira] [JBoss JIRA] (DROOLS-5276) Better error message when a DMN model doesn't have a name

[Toshiya Kobayashi (Jira)]

Toshiya Kobayashi created DROOLS-5276:
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             Summary: Better error message when a DMN model doesn't have a name
                 Key: DROOLS-5276
                 URL: https://issues.redhat.com/browse/DROOLS-5276
             Project: Drools
          Issue Type: Bug
            Reporter: Toshiya Kobayashi
            Assignee: Mario Fusco


If DMN doesn't have a name,  kogito start up fails with the following Exception. We may log a more informative error message.
{noformat}
2020-04-27 18:22:51,063 ERROR [io.qua.dep.dev.DevModeMain] (main) Failed to start Quarkus: java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
	[error]: Build step org.kie.kogito.quarkus.deployment.KogitoAssetsProcessor#generateModel threw an exception: java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:47)
	at java.base/java.lang.String.charAt(String.java:693)
	at org.drools.core.util.StringUtils.capitalize(StringUtils.java:1292)
	at org.kie.kogito.codegen.decision.DMNRestResourceGenerator.<init>(DMNRestResourceGenerator.java:69)
	at org.kie.kogito.codegen.decision.DecisionCodegen.generate(DecisionCodegen.java:158)
	at org.kie.kogito.codegen.decision.DecisionCodegen.generate(DecisionCodegen.java:59)
	at org.kie.kogito.codegen.ApplicationGenerator.lambda$generateComponents$10(ApplicationGenerator.java:226)
	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.kie.kogito.codegen.ApplicationGenerator.generateComponents(ApplicationGenerator.java:227)
	at org.kie.kogito.codegen.ApplicationGenerator.generate(ApplicationGenerator.java:208)
	at org.kie.kogito.quarkus.deployment.KogitoAssetsProcessor.generateModel(KogitoAssetsProcessor.java:180)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at io.quarkus.deployment.ExtensionLoader$2.execute(ExtensionLoader.java:931)
	at io.quarkus.builder.BuildContext.run(BuildContext.java:277)
	at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2027)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1551)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1442)
	at java.base/java.lang.Thread.run(Thread.java:834)
	at org.jboss.threads.JBossThread.run(JBossThread.java:479)
{noformat}



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