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https://issues.apache.org/jira/browse/CALCITE-5706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-5706.
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Fix Version/s: 1.35.0
Resolution: Fixed
Fixed in
[4219c993|https://github.com/apache/calcite/commit/4219c993b642f7ba66f7b9a28a66f4616eb1168a].
> Add class PairList
> ------------------
>
> Key: CALCITE-5706
> URL: https://issues.apache.org/jira/browse/CALCITE-5706
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.35.0
>
>
> Add a {{class PairList}} which is an implementation of {{List<Map.Entry<K,
> V>}} backed by a single list. Each entry to the {{PairList}} corresponds to
> two entries in the backing list, but we save ourselves the effort of creating
> {{Map.Entry}} wrappers.
> A {{PairList}} can be used to build two lists in parallel (e.g. a list of
> field types and field names that will be converted to a struct type); it can
> also be used to build maps.
> It has a {{forEach(BiConsumer<K, V>)}} method to allow the list to be
> deconstructed without creating intermediate entries.
> Potentially also {{toImmutableMap}} and {{toHashMap}} methods.
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