Fix serde of FilterTuning maxCardinalityToUseBitmapIndex. (#8551)

processing/src/main/java/org/apache/druid/query/filter/FilterTuning.java

@@ -60,7 +60,7 @@ public class FilterTuning
   public FilterTuning(
       @JsonProperty("useBitmapIndex") @Nullable Boolean useBitmapIndex,
       @JsonProperty("minCardinalityToUseBitmapIndex") @Nullable Integer minCardinalityToUseBitmapIndex,
-      @JsonProperty("useIndexMaximumCardinalityThreshold") @Nullable Integer maxCardinalityToUseBitmapIndex
+      @JsonProperty("maxCardinalityToUseBitmapIndex") @Nullable Integer maxCardinalityToUseBitmapIndex
   )
   {
     this.useBitmapIndex = useBitmapIndex != null ? useBitmapIndex : true;

processing/src/test/java/org/apache/druid/query/filter/FilterTuningTest.java

@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.druid.query.filter;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.druid.jackson.DefaultObjectMapper;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class FilterTuningTest
+{
+  @Test
+  public void testSerde() throws Exception
+  {
+    final ObjectMapper objectMapper = new DefaultObjectMapper();
+
+    final FilterTuning filterTuning1 = new FilterTuning(false, 100, 200);
+    Assert.assertEquals(
+        filterTuning1,
+        objectMapper.readValue(objectMapper.writeValueAsString(filterTuning1), FilterTuning.class)
+    );
+
+    final FilterTuning filterTuning2 = new FilterTuning(true, 100, 200);
+    Assert.assertEquals(
+        filterTuning2,
+        objectMapper.readValue(objectMapper.writeValueAsString(filterTuning2), FilterTuning.class)
+    );
+  }
+}