Allow for explicit null in HttpContext and HttpParams
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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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