Robert Schimansky created CONFIGURATION-618:
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Summary: 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
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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