[jira] [Created] (JEXL-221) Sporadic undefined property error caused by NPE at MapGetExecutor.tryInvoke()

[Dmitri Blinov (JIRA)]

Dmitri Blinov created JEXL-221:
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             Summary: Sporadic undefined property error caused by NPE at 
MapGetExecutor.tryInvoke()
                 Key: JEXL-221
                 URL: https://issues.apache.org/jira/browse/JEXL-221
             Project: Commons JEXL
          Issue Type: Bug
    Affects Versions: 3.0
            Reporter: Dmitri Blinov


I'm getting sporadic undefined property error when accessing hashmap by a key. 
The stack trace tells the cause is NPE in MapGetExecutor.tryInvoke() at the 
following line:
{code}
        if (obj != null && method != null
                && objectClass.equals(obj.getClass())
                && (key == null || property.getClass().equals(key.getClass()))) 
{
{code}

I have managed to overcome this issue by adding the following null check:
{code}
        if (obj != null && method != null
                && objectClass.equals(obj.getClass())
                && (key == null || property != null && 
property.getClass().equals(key.getClass()))) {
{code}

I have only vague understanding of how things work inside jexl with tryInvoke() 
and unfortunately can not provide any test case for this, but it has worked in 
my case, so if nobody have any objections please include the fix in source tree.

Thanks!



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