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Posted to dev@myfaces.apache.org by "Ross Clewley (JIRA)" <de...@myfaces.apache.org> on 2014/05/20 19:04:39 UTC

[jira] [Commented] (PORTLETBRIDGE-234) remove(String) in BridgeRequestScopeRepository and remove(Object) in HashMap have the same erasure.

    [ https://issues.apache.org/jira/browse/PORTLETBRIDGE-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14003635#comment-14003635 ] 

Ross Clewley commented on PORTLETBRIDGE-234:
--------------------------------------------

The signature of the remove method in BridgeRequestScopeRepository is 
  public BridgeRequestScope remove(String key)

Confusingly, BridgeRequestScope is not a class name in this context but a generics type parameter name (this is somewhat misleading and probably ought to be cleaned up):

public class BridgeRequestScopeRepository<String, BridgeRequestScope extends ConcurrentMap<String, Object>>
  extends LinkedHashMap<String, BridgeRequestScope>

Therefore BridgeRequestScope will be erased at runtime, leading to the conflict with the superclass method from HashMap which is declared as:

public V remove(Object key) { }.



> remove(String) in BridgeRequestScopeRepository and remove(Object) in HashMap have the same erasure.
> ---------------------------------------------------------------------------------------------------
>
>                 Key: PORTLETBRIDGE-234
>                 URL: https://issues.apache.org/jira/browse/PORTLETBRIDGE-234
>             Project: MyFaces Portlet Bridge
>          Issue Type: Bug
>          Components: Impl
>    Affects Versions: 3.0.0
>            Reporter: Ross Clewley
>            Assignee: Michael Freedman
>
> Compiling the portlet bridge impl project on trunk produces the following compilation error.
> [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.1:compile (default-compile) on project portlet-bridge-impl: Compilation failure
> [ERROR] /myfaces-trunk/impl/src/main/java/org/apache/myfaces/portlet/faces/bridge/scope/BridgeRequestScopeRepository.java:[55,28] error: name clash: remove(String) in BridgeRequestScopeRepository and remove(Object) in HashMap have the same erasure, yet neither overrides the other



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