[jira] Issue Comment Edited: (COLLECTIONS-355) class cast exception in common collection-3.2 jar

["Julien Aymé (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COLLECTIONS-355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12871739#action_12871739 ] 

Julien Aymé edited comment on COLLECTIONS-355 at 5/26/10 9:29 AM:
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Hello,

I think the ClassCastException is thrown because the lstQueuedPsgrs object you have is not an HashMap but a ListOrderedMap.
Did you try to cast your object to a Map instead?

It is generally better to use the Map interface rather than a specific implementation in case of the implementation changes, just as the error you appears to have.

HTH,
Regards,

Julien

      was (Author: julien.ayme@gmail.com):
    Hello,

I think the ClassCastException is thrown because what the lstQueuedPsgrs object you have is not an HashMap but a ListOrderedMap.
Did you try to cast your object to a Map instead?

It is generally better to use the Map interface rather than a specific implementation in case of the implementation changes, just as the error you appears to have.

HTH,
Regards,

Julien
  
> class cast exception in common collection-3.2  jar
> --------------------------------------------------
>
>                 Key: COLLECTIONS-355
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-355
>             Project: Commons Collections
>          Issue Type: Bug
>          Components: Map
>    Affects Versions: 3.2
>         Environment: Unix, jdk 1.5.0.06
>            Reporter: maneesh
>
> Recently I have upgraded common collection jar to 3.2 version. After that I got a class cast exception in the following code java code 
> String checkedInStation = (String)(((HashMap)lstQueuedPsgrs.get(startIndex))
>                         .get("PSGRCHECKEDINSTATION"));
> The exception detail as below
> java.lang.ClassCastException: org.apache.commons.collections.map.ListOrderedMap at sun.reflect.GeneratedMethodAccessor279.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:287) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation

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