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From "Roland Weber (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HTTPCORE-65) Allow for explicit null in HttpContext and HttpParams
Date Sat, 07 Apr 2007 19:10:32 GMT

    [ https://issues.apache.org/jira/browse/HTTPCORE-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487409
] 

Roland Weber commented on HTTPCORE-65:
--------------------------------------

Hi Oleg,

that method helps for outside inspection of an HttpParams object, but it does not solve the
problem I raised. We should change the behavior of getParameter()/getAttribute() to not return
a (grand-)parent value if the local object or one of the parents overrides with null.
An application that has a default, which is picked up for example when a request gets executed,
can use isParameterSetLocally() to determine where exactly that parameter comes from. But
knowing that the default is set on the HttpClient level does not help to un-set it for a specific
request execution.

cheers,
  Roland



> Allow for explicit null in HttpContext and HttpParams
> -----------------------------------------------------
>
>                 Key: HTTPCORE-65
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-65
>             Project: HttpComponents Core
>          Issue Type: Improvement
>          Components: HttpCore
>    Affects Versions: 4.0-alpha4
>            Reporter: Roland Weber
>            Priority: Minor
>
> Both HttpContext and HttpParams support hierarchies. The current implementations ([Sync]HttpExecutionContext,
BasicHttpParams) do allow for overriding a parent/default value with another value, but they
do not allow for overriding with null. Implementation alternatives:
> - lookup the map entry instead of the value, do not fall back to parent/default if an
entry is there with a null value
> - use a dedicated constant to represent an explicit null value
> cheers,
>   Roland

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