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https://issues.apache.org/jira/browse/HTTPCORE-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487408
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Oleg Kalnichevski commented on HTTPCORE-65:
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Roland,
HttpParams interface has a method called isParameterSetLocally() that is
intended exactly for that purpose. We could add something similar to
ExecutionContext. Would that solve the problem for you?
Oleg
> 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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