Implement WithFieldName interface in ValuesSourceAggregationBuilder

Signed-off-by: David Zane <[email protected]>

Author: dzane17

server/src/main/java/org/opensearch/search/aggregations/support/ValuesSourceAggregationBuilder.java

@@ -40,6 +40,7 @@
 import org.opensearch.core.xcontent.XContentBuilder;
 import org.opensearch.core.xcontent.XContentParser;
 import org.opensearch.index.query.QueryShardContext;
+import org.opensearch.index.query.WithFieldName;
 import org.opensearch.script.Script;
 import org.opensearch.search.aggregations.AbstractAggregationBuilder;
 import org.opensearch.search.aggregations.AggregationInitializationException;
@@ -57,7 +58,9 @@
  *
  * @opensearch.internal
  */
-public abstract class ValuesSourceAggregationBuilder<AB extends ValuesSourceAggregationBuilder<AB>> extends AbstractAggregationBuilder<AB> {
+public abstract class ValuesSourceAggregationBuilder<AB extends ValuesSourceAggregationBuilder<AB>> extends AbstractAggregationBuilder<AB>
+    implements
+        WithFieldName {
 
     public static <T> void declareFields(
         AbstractObjectParser<? extends ValuesSourceAggregationBuilder<?>, T> objectParser,
@@ -292,6 +295,11 @@ public String field() {
         return field;
     }
 
+    @Override
+    public String fieldName() {
+        return field();
+    }
+
     /**
      * Sets the script to use for this aggregation.
      */

server/src/main/java/org/opensearch/search/sort/FieldSortBuilder.java

@@ -65,6 +65,7 @@
 import org.opensearch.index.query.QueryRewriteContext;
 import org.opensearch.index.query.QueryShardContext;
 import org.opensearch.index.query.QueryShardException;
+import org.opensearch.index.query.WithFieldName;
 import org.opensearch.search.DocValueFormat;
 import org.opensearch.search.MultiValueMode;
 import org.opensearch.search.SearchSortValuesAndFormats;
@@ -86,7 +87,7 @@
  *
  * @opensearch.internal
  */
-public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
+public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> implements WithFieldName {
     private static final DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(FieldSortBuilder.class);
 
     public static final String NAME = "field_sort";
@@ -184,6 +185,11 @@ public String getFieldName() {
         return this.fieldName;
     }
 
+    @Override
+    public String fieldName() {
+        return getFieldName();
+    }
+
     /**
      * Sets the value when a field is missing in a doc. Can also be set to {@code _last} or
      * {@code _first} to sort missing last or first respectively.