rajarshisarkar commented on a change in pull request #4011:
URL: https://github.com/apache/iceberg/pull/4011#discussion_r826608670
##########
File path: core/src/main/java/org/apache/iceberg/util/PropertyUtil.java
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@@ -70,4 +73,26 @@ public static String propertyAsString(Map<String, String>
properties,
}
return defaultValue;
}
+
+ /**
+ * Returns subset of provided map with keys matching the provided prefix.
Matching is case-sensitive and the matching
+ * prefix is removed from the keys in returned map.
+ *
+ * @param properties input map
+ * @param prefix prefix to choose keys from input map
+ * @return subset of input map with keys starting with provided prefix and
prefix trimmed out
+ */
+ public static Map<String, String> propertiesWithPrefix(Map<String, String>
properties,
+ String prefix) {
+ if (properties == null || properties.isEmpty()) {
+ return ImmutableMap.of();
+ }
+
+ Preconditions.checkState(prefix != null, "prefix can't be null.");
+
+ return properties.entrySet().stream()
+ .filter(e -> e.getKey().startsWith(prefix))
+ .collect(Collectors.toMap(
+ e -> e.getKey().replaceFirst(prefix, ""), Map.Entry::getValue));
+ }
Review comment:
We recently took this method in `master` to extract a map having s3
write tags prefix (https://github.com/apache/iceberg/pull/4259).
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