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From "Oliver Heger (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CONFIGURATION-618) Accessing missing properties of immutable subset throws UndeclaredThrowableException instead of NoSuchElementException
Date Sun, 07 Feb 2016 18:15:40 GMT

     [ https://issues.apache.org/jira/browse/CONFIGURATION-618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Oliver Heger resolved CONFIGURATION-618.
----------------------------------------
       Resolution: Fixed
    Fix Version/s: 2.0

Fixed in svn in revision 1728999.

Many thanks for the report!

> Accessing missing properties of immutable subset throws UndeclaredThrowableException
instead of NoSuchElementException
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: CONFIGURATION-618
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-618
>             Project: Commons Configuration
>          Issue Type: Bug
>    Affects Versions: 2.0-beta2
>         Environment: Oracle JDK 1.8.0_60
>            Reporter: Robert Schimansky
>            Priority: Minor
>             Fix For: 2.0
>
>
> When I access a non-existing property of a configuration that has ThrowExceptionOnMissing
set an java.lang.reflect.UndeclaredThrowableException is thrown. I think the desired behaviour
would be to pass the underlying java.util.NoSuchElementException through from the ImmutableConfigurationInvocationHandler.
> Example code:
> {code}
> import org.apache.commons.configuration2.ImmutableConfiguration;
> import org.apache.commons.configuration2.PropertiesConfiguration;
> public class ImmutableConfigurationStacktraceTest {
> 	public static void main(String[] args) {
> 		//create empty PropertiesConfiguration
> 		PropertiesConfiguration propertiesConfiguration = new PropertiesConfiguration();
> 		//throw error when non-existing property is requested
> 		propertiesConfiguration.setThrowExceptionOnMissing(true);
> 		
> 		//get immutable subset handled by ImmutableConfigurationInvocationHandler
> 		ImmutableConfiguration subset = propertiesConfiguration.immutableSubset("");
> 		
> 		//this should throw java.util.NoSuchElementException
> 		subset.getString("whoops!");
> 	}
> }
> {code}
> gives the stacktrace:
> {code}
> Exception in thread "main" java.lang.reflect.UndeclaredThrowableException
> 	at com.sun.proxy.$Proxy0.getString(Unknown Source)
> 	at test.main(test.java:10)
> Caused by: java.lang.reflect.InvocationTargetException
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at org.apache.commons.configuration2.ImmutableConfigurationInvocationHandler.invoke(ImmutableConfigurationInvocationHandler.java:79)
> 	... 2 more
> Caused by: java.util.NoSuchElementException: Key 'whoops!' does not map to an existing
object!
> 	at org.apache.commons.configuration2.AbstractConfiguration.throwMissingPropertyException(AbstractConfiguration.java:1873)
> 	at org.apache.commons.configuration2.AbstractConfiguration.convert(AbstractConfiguration.java:1784)
> 	at org.apache.commons.configuration2.AbstractConfiguration.getString(AbstractConfiguration.java:1343)
> 	... 7 more
> {code}



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