[jira] [Commented] (MIME4J-222) MessageImplFactory is needed

["Ioan Eugen Stan (JIRA)" <mi...@james.apache.org>]

    [ https://issues.apache.org/jira/browse/MIME4J-222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13598750#comment-13598750 ] 

Ioan Eugen Stan commented on MIME4J-222:
----------------------------------------

Thank you, I will take care of it.
                
> MessageImplFactory is needed
> ----------------------------
>
>                 Key: MIME4J-222
>                 URL: https://issues.apache.org/jira/browse/MIME4J-222
>             Project: James Mime4j
>          Issue Type: Improvement
>          Components: parser (core)
>    Affects Versions: 0.8
>            Reporter: Raman Gupta
>            Assignee: Ioan Eugen Stan
>             Fix For: 0.8
>
>         Attachments: mime4j-222.patch
>
>
> In order to create a custom Message-Id, one must currently override the method "newMessageId" e.g.
>         return new MessageImpl() {
>             @Override
>             protected UnstructuredField newMessageId(String hostname) {
>                 String fieldValue = createUniqueMessageId(hostname);
>                 return parse(UnstructuredFieldImpl.PARSER, FieldName.MESSAGE_ID, fieldValue);
>             }
>         };
> However, in some cases Mime4j instantiates the MessageImpl internally e.g. DefaultMessageBuilder.parseMessage and therefore the newMessageId function cannot be overwridden. This means that I cannot use DefaultMessageBuilder to create a MessageImpl in which I control how the Message-Id is created.
> I have attached a patch to make DefaultMessageBuilder take a MessageImplFactory to create the MessageImpl.

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