[GitHub] [hudi] codope commented on a diff in pull request #5637: [HUDI-4124] Add valid check in Spark Datasource configs

[GitBox <gi...@apache.org>]

codope commented on code in PR #5637:
URL: https://github.com/apache/hudi/pull/5637#discussion_r882337916


##########
hudi-common/src/main/java/org/apache/hudi/common/config/ConfigProperty.java:
##########
@@ -95,33 +99,46 @@ Option<Function<HoodieConfig, Option<T>>> getInferFunc() {
     return inferFunction;
   }
 
+  public void checkValues(String value) {
+    if (validValues != null && !validValues.isEmpty() && !validValues.contains(value)) {
+      throw new IllegalArgumentException(
+          "The value of " + key + " should be one of "
+              + String.join(",", validValues) + ", but was " + value);
+    }
+  }
+
   public List<String> getAlternatives() {
     return Arrays.asList(alternatives);
   }
 
   public ConfigProperty<T> withDocumentation(String doc) {
     Objects.requireNonNull(doc);
-    return new ConfigProperty<>(key, defaultValue, doc, sinceVersion, deprecatedVersion, inferFunction, alternatives);
+    return new ConfigProperty<>(key, defaultValue, doc, sinceVersion, deprecatedVersion, inferFunction, validValues, alternatives);
+  }
+
+  public ConfigProperty<T> withValidValues(List<String> validValues) {

Review Comment:
   Why List? Why not Set?



##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/config/HoodieIndexConfig.java:
##########
@@ -57,7 +64,11 @@ public class HoodieIndexConfig extends HoodieConfig {
 
   public static final ConfigProperty<String> INDEX_TYPE = ConfigProperty
       .key("hoodie.index.type")
-      .noDefaultValue()
+      .defaultValue(SIMPLE.name())

Review Comment:
   There is already `HoodieIndexConfig#getDefaultIndexType` method which sets default which gets called by the builder. That method sets value based on execution engine. Why are we setting default here? I am not sure simple index (which relies on spark lean join) would work with flink. cc @danny0405 



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