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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 updated CALCITE-5706:
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Description:
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.
was:
Add a {{class PairList}} which an implementation of {{List<Map.Entry<K, V>}}
backed by a single list. It 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.
> 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
>
> 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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