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https://issues.apache.org/jira/browse/MIME4J-299?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoit Tellier closed MIME4J-299.
---------------------------------
    Resolution: Fixed

> Allow to access Header as a map
> -------------------------------
>
>                 Key: MIME4J-299
>                 URL: https://issues.apache.org/jira/browse/MIME4J-299
>             Project: James Mime4j
>          Issue Type: New Feature
>          Components: dom
>    Affects Versions: 0.8.5
>            Reporter: Benoit Tellier
>            Priority: Major
>             Fix For: 0.8.6
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Today complex code is required to group headers by name:
> {code:java}
>     static ImmutableMap<String, String> toHeaderMap(Header header) {
>         Function<Map.Entry<String, Collection<Field>>, String> 
> bodyConcatenator = fieldListEntry -> fieldListEntry.getValue()
>             .stream()
>             .map(Field::getBody)
>             .map(MimeUtil::unscrambleHeaderValue)
>             .collect(Collectors.toList())
>             .stream()
>             .collect(Collectors.joining(JMAP_MULTIVALUED_FIELD_DELIMITER));
>         return Multimaps.index(header.getFields(), Field::getName)
>             .asMap()
>             .entrySet()
>             .stream()
>             .collect(Guavate.toImmutableMap(Map.Entry::getKey, 
> bodyConcatenator));
>     }
> {code}
> Carrying over the header map can get this way simpler:
> {code:java}
>         static ImmutableMap<String, String> toHeaderMap(Header header) {
>             return header.getFieldsAsMap()
>                 .entrySet()
>                 .stream()
>                 .collect(Guavate.toImmutableMap(Map.Entry::getKey,
>                     entry -> entry.getValue().stream()
>                         .map(Field::getBody)
>                         .map(body -> DecoderUtil.decodeEncodedWords(body, 
> DecodeMonitor.SILENT))
>                         
> .collect(Collectors.joining(JMAP_MULTIVALUED_FIELD_DELIMITER))));
>         }
> {code}



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