liyafan82 commented on a change in pull request #9088:
URL: https://github.com/apache/arrow/pull/9088#discussion_r551302282
##########
File path:
java/vector/src/main/java/org/apache/arrow/vector/types/pojo/Schema.java
##########
@@ -137,15 +138,35 @@ private Schema(@JsonProperty("fields") Iterable<Field>
fields,
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
}
+ static List<Map<String, String>> convertMetadata(Map<String, String>
metadata) {
+ return (metadata == null) ? null : metadata.entrySet()
+ .stream()
+ .map(Schema::convertEntryToKeyValueMap)
+ .collect(Collectors.toList());
+ }
+
+ private static Map<String, String>
convertEntryToKeyValueMap(Map.Entry<String, String> entry) {
+ Map<String, String> map = new HashMap<>(2);
+ map.put("key", entry.getKey());
Review comment:
maybe we can extract the literals as static final variables?
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