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https://issues.apache.org/jira/browse/LOG4J2-1681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Remko Popma closed LOG4J2-1681.
-------------------------------
Resolution: Fixed
I changed the scope of this ticket from just making the methods public in the
implementation class to the introduction of the Indexed(ReadOnly)StringMap
interfaces.
> Introduce interfaces IndexedStringMap and IndexedReadOnlyStringMap
> ------------------------------------------------------------------
>
> Key: LOG4J2-1681
> URL: https://issues.apache.org/jira/browse/LOG4J2-1681
> Project: Log4j 2
> Issue Type: New Feature
> Components: API
> Affects Versions: 2.7
> Reporter: Remko Popma
> Assignee: Remko Popma
> Fix For: 2.8
>
>
> This ticket proposes to introduce a public interface that imposes a total
> ordering over the keys of a (ReadOnly)StringMap. This interface views all
> key-value pairs as a sequence ordered by key, and allows keys and values to
> be accessed by their index in the sequence.
> {code}
> interface IndexedReadOnlyStringMap extends ReadOnlyStringMap {
> String getKeyAt(final int index);
> <V> V getValueAt(final int index);
> int indexOfKey(final String key);
> }
> interface IndexedStringMap extends IndexedReadOnlyStringMap, StringMap {}
> {code}
> The intention is to let SortedArrayStringMap implement these interfaces. (It
> already implements the necessary methods; the visibility of these methods
> will change from package-protected to public.)
> These interfaces help reduce log4j's dependency on the JDK Map interface: the
> JDK Map interface does not provide a garbage-free way to iterate over all its
> keys or key-value pairs.
> For example, these interfaces can be used to make MapFilter and its
> subclasses garbage-free, and reduce allocation of temporary objects in
> MapMessage and subclasses.
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