Fix serde for ArrayOfDoublesSketchConstantPostAggregator. (#16550)

* Fix serde for ArrayOfDoublesSketchConstantPostAggregator.

The version originally added in #13819 was missing an annotation for
the "value" property. Fixes #16539.

Line endings for ArrayOfDoublesSketchConstantPostAggregator.java are changed
from \r\n to \n.

Adds a serde test, and improves various other datasketches post-aggregator
serde tests to deserialize into PostAggregator. This verifies that the type
information is set up correctly.

* Fix excessive imports.

* Fix equals, hashCode.

extensions-core/datasketches/src/main/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchConstantPostAggregator.java

@@ -92,6 +92,7 @@ public class ArrayOfDoublesSketchConstantPostAggregator extends ArrayOfDoublesSk
     return "ArrayOfDoublesSketchConstantPostAggregator{name='" + this.getName() + "', value='" + value + "'}";
   }
 
+  @JsonProperty("value")
   private String getRawSketchValue()
   {
     return value;
@@ -106,18 +107,17 @@ public class ArrayOfDoublesSketchConstantPostAggregator extends ArrayOfDoublesSk
     if (o == null || getClass() != o.getClass()) {
       return false;
     }
-    ArrayOfDoublesSketchConstantPostAggregator that = (ArrayOfDoublesSketchConstantPostAggregator) o;
+    if (!super.equals(o)) {
-    if (!(Objects.equals(this.getName(), that.getName()) && Objects.equals(this.value, that.value)
-        && Objects.equals(this.getSketchValue(), that.getSketchValue()))) {
       return false;
     }
-    return true;
+    ArrayOfDoublesSketchConstantPostAggregator that = (ArrayOfDoublesSketchConstantPostAggregator) o;
+    return Objects.equals(value, that.value);
   }
 
   @Override
   public int hashCode()
   {
-    return Objects.hash(super.hashCode(), value, sketchValue);
+    return Objects.hash(super.hashCode(), value);
   }
 
   @Override

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchToEstimatePostAggregatorTest.java

@@ -45,9 +45,10 @@ public class HllSketchToEstimatePostAggregatorTest
         true
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    HllSketchToEstimatePostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new HllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        HllSketchToEstimatePostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchToEstimateWithBoundsPostAggregatorTest.java

@@ -38,9 +38,10 @@ public class HllSketchToEstimateWithBoundsPostAggregatorTest
         2
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    HllSketchToEstimateWithBoundsPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new HllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        HllSketchToEstimateWithBoundsPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchToStringPostAggregatorTest.java

@@ -37,9 +37,10 @@ public class HllSketchToStringPostAggregatorTest
         new FieldAccessPostAggregator("field1", "sketch")
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    HllSketchToStringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new HllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        HllSketchToStringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/hll/HllSketchUnionPostAggregatorTest.java

@@ -45,9 +45,10 @@ public class HllSketchUnionPostAggregatorTest
         TgtHllType.HLL_8.name()
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    HllSketchUnionPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new HllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        HllSketchUnionPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllDoublesSketchToCDFPostAggregatorTest.java

@@ -55,9 +55,10 @@ public class KllDoublesSketchToCDFPostAggregatorTest
         new double[]{0.25, 0.75}
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllDoublesSketchToCDFPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllDoublesSketchToCDFPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllDoublesSketchToHistogramPostAggregatorTest.java

@@ -56,9 +56,10 @@ public class KllDoublesSketchToHistogramPostAggregatorTest
         null
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllDoublesSketchToHistogramPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllDoublesSketchToHistogramPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllDoublesSketchToQuantilePostAggregatorTest.java

@@ -38,9 +38,10 @@ public class KllDoublesSketchToQuantilePostAggregatorTest
         0.5
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllDoublesSketchToQuantilePostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllDoublesSketchToQuantilePostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllDoublesSketchToQuantilesPostAggregatorTest.java

@@ -55,9 +55,10 @@ public class KllDoublesSketchToQuantilesPostAggregatorTest
         new double[] {0, 0.5, 1}
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllDoublesSketchToQuantilesPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllDoublesSketchToQuantilesPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllDoublesSketchToRankPostAggregatorTest.java

@@ -49,9 +49,10 @@ public class KllDoublesSketchToRankPostAggregatorTest
         0
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllDoublesSketchToRankPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllDoublesSketchToRankPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllDoublesSketchToStringPostAggregatorTest.java

@@ -43,9 +43,10 @@ public class KllDoublesSketchToStringPostAggregatorTest
         new FieldAccessPostAggregator("field1", "sketch")
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllDoublesSketchToStringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllDoublesSketchToStringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllFloatsSketchToCDFPostAggregatorTest.java

@@ -55,9 +55,10 @@ public class KllFloatsSketchToCDFPostAggregatorTest
         new float[]{0.25f, 0.75f}
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllFloatsSketchToCDFPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllFloatsSketchToCDFPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllFloatsSketchToHistogramPostAggregatorTest.java

@@ -56,9 +56,10 @@ public class KllFloatsSketchToHistogramPostAggregatorTest
         null
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllFloatsSketchToHistogramPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllFloatsSketchToHistogramPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllFloatsSketchToQuantilePostAggregatorTest.java

@@ -38,9 +38,10 @@ public class KllFloatsSketchToQuantilePostAggregatorTest
         0.5
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllFloatsSketchToQuantilePostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllFloatsSketchToQuantilePostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllFloatsSketchToQuantilesPostAggregatorTest.java

@@ -55,9 +55,10 @@ public class KllFloatsSketchToQuantilesPostAggregatorTest
         new double[] {0, 0.5, 1}
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllFloatsSketchToQuantilesPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllFloatsSketchToQuantilesPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllFloatsSketchToRankPostAggregatorTest.java

@@ -49,9 +49,10 @@ public class KllFloatsSketchToRankPostAggregatorTest
         0
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllFloatsSketchToRankPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllFloatsSketchToRankPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/kll/KllFloatsSketchToStringPostAggregatorTest.java

@@ -43,9 +43,10 @@ public class KllFloatsSketchToStringPostAggregatorTest
         new FieldAccessPostAggregator("field1", "sketch")
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    KllFloatsSketchToStringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new KllSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        KllFloatsSketchToStringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/quantiles/DoublesSketchToCDFPostAggregatorTest.java

@@ -55,9 +55,10 @@ public class DoublesSketchToCDFPostAggregatorTest
         new double[]{0.25, 0.75}
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    DoublesSketchToCDFPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new DoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        DoublesSketchToCDFPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/quantiles/DoublesSketchToHistogramPostAggregatorTest.java

@@ -56,9 +56,10 @@ public class DoublesSketchToHistogramPostAggregatorTest
         null
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    DoublesSketchToHistogramPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new DoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        DoublesSketchToHistogramPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/quantiles/DoublesSketchToQuantilePostAggregatorTest.java

@@ -38,9 +38,10 @@ public class DoublesSketchToQuantilePostAggregatorTest
         0.5
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    DoublesSketchToQuantilePostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new DoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        DoublesSketchToQuantilePostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/quantiles/DoublesSketchToQuantilesPostAggregatorTest.java

@@ -55,9 +55,10 @@ public class DoublesSketchToQuantilesPostAggregatorTest
         new double[] {0, 0.5, 1}
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    DoublesSketchToQuantilesPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new DoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        DoublesSketchToQuantilesPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/quantiles/DoublesSketchToRankPostAggregatorTest.java

@@ -49,9 +49,10 @@ public class DoublesSketchToRankPostAggregatorTest
         0
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    DoublesSketchToRankPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new DoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        DoublesSketchToRankPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/quantiles/DoublesSketchToStringPostAggregatorTest.java

@@ -43,9 +43,10 @@ public class DoublesSketchToStringPostAggregatorTest
         new FieldAccessPostAggregator("field1", "sketch")
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    DoublesSketchToStringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new DoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        DoublesSketchToStringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/theta/SketchSetPostAggregatorTest.java

@@ -85,11 +85,13 @@ public class SketchSetPostAggregatorTest
     );
     List<PostAggregator> serdeTests = Arrays.asList(union, intersect, not);
 
-    for (PostAggregator there : serdeTests) {
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-      SketchSetPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new SketchModule().getJacksonModules());
+
+    for (PostAggregator there : serdeTests) {
+      PostAggregator andBackAgain = mapper.readValue(
           mapper.writeValueAsString(there),
-          SketchSetPostAggregator.class
+          PostAggregator.class
       );
 
       Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/theta/SketchToStringPostAggregatorTest.java

@@ -47,9 +47,10 @@ public class SketchToStringPostAggregatorTest
         new FieldAccessPostAggregator("field", "sketch")
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    SketchToStringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new SketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        SketchToStringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchConstantPostAggregatorTest.java

@@ -19,7 +19,9 @@
 
 package org.apache.druid.query.aggregation.datasketches.tuple;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import nl.jqno.equalsverifier.EqualsVerifier;
+import org.apache.druid.jackson.DefaultObjectMapper;
 import org.apache.druid.java.util.common.guava.Comparators;
 import org.apache.druid.query.aggregation.PostAggregator;
 import org.junit.Assert;
@@ -28,7 +30,6 @@ import org.junit.Test;
 
 public class ArrayOfDoublesSketchConstantPostAggregatorTest
 {
-
   @Test
   public void testSketchValue()
   {
@@ -66,11 +67,31 @@ public class ArrayOfDoublesSketchConstantPostAggregatorTest
     Assert.assertEquals(Comparators.alwaysEqual(), postAgg.getComparator());
   }
 
+  @Test
+  public void testSerde() throws JsonProcessingException
+  {
+    final PostAggregator there = new ArrayOfDoublesSketchConstantPostAggregator(
+        "p",
+        "AQEJAwgBzJP/////////fwIAAAAAAAAAzT6NGdX0aWUOJvS5EIhpLwAAAAAAAAAAAAAAAAAAAAA="
+    );
+    DefaultObjectMapper mapper = new DefaultObjectMapper();
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
+        mapper.writeValueAsString(there),
+        PostAggregator.class
+    );
+
+    Assert.assertEquals(there, andBackAgain);
+    Assert.assertArrayEquals(there.getCacheKey(), andBackAgain.getCacheKey());
+  }
+
   @Test
   public void testEqualsAndHashCode()
   {
     EqualsVerifier.forClass(ArrayOfDoublesSketchConstantPostAggregator.class)
                   .usingGetClass()
+                  .withNonnullFields("name")
+                  .withIgnoredFields("sketchValue")
                   .verify();
   }
 }

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchSetOpPostAggregatorTest.java

@@ -76,9 +76,10 @@ public class ArrayOfDoublesSketchSetOpPostAggregatorTest
         Arrays.asList(new ConstantPostAggregator("", 0), new ConstantPostAggregator("", 0))
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchSetOpPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchSetOpPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchTTestPostAggregatorTest.java

@@ -84,9 +84,10 @@ public class ArrayOfDoublesSketchTTestPostAggregatorTest
         Arrays.asList(new ConstantPostAggregator("", 0), new ConstantPostAggregator("", 0))
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchTTestPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchTTestPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToBase64StringPostAggregatorTest.java

@@ -51,9 +51,10 @@ public class ArrayOfDoublesSketchToBase64StringPostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToBase64StringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToBase64StringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToEstimateAndBoundsPostAggregatorTest.java

@@ -44,9 +44,10 @@ public class ArrayOfDoublesSketchToEstimateAndBoundsPostAggregatorTest
         null
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToEstimateAndBoundsPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToEstimateAndBoundsPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToEstimatePostAggregatorTest.java

@@ -50,9 +50,10 @@ public class ArrayOfDoublesSketchToEstimatePostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToEstimatePostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToEstimatePostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToMeansPostAggregatorTest.java

@@ -50,9 +50,10 @@ public class ArrayOfDoublesSketchToMeansPostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToMeansPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToMeansPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToMetricsSumEstimatePostAggregatorTest.java

@@ -52,9 +52,10 @@ public class ArrayOfDoublesSketchToMetricsSumEstimatePostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToMetricsSumEstimatePostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToMetricsSumEstimatePostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToNumEntriesPostAggregatorTest.java

@@ -50,9 +50,10 @@ public class ArrayOfDoublesSketchToNumEntriesPostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToNumEntriesPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToNumEntriesPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToQuantilesSketchPostAggregatorTest.java

@@ -54,9 +54,10 @@ public class ArrayOfDoublesSketchToQuantilesSketchPostAggregatorTest
         null
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToQuantilesSketchPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToQuantilesSketchPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToStringPostAggregatorTest.java

@@ -50,9 +50,10 @@ public class ArrayOfDoublesSketchToStringPostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToStringPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToStringPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);

extensions-core/datasketches/src/test/java/org/apache/druid/query/aggregation/datasketches/tuple/ArrayOfDoublesSketchToVariancesPostAggregatorTest.java

@@ -50,9 +50,10 @@ public class ArrayOfDoublesSketchToVariancesPostAggregatorTest
         new ConstantPostAggregator("", 0)
     );
     DefaultObjectMapper mapper = new DefaultObjectMapper();
-    ArrayOfDoublesSketchToVariancesPostAggregator andBackAgain = mapper.readValue(
+    mapper.registerModules(new ArrayOfDoublesSketchModule().getJacksonModules());
+    PostAggregator andBackAgain = mapper.readValue(
         mapper.writeValueAsString(there),
-        ArrayOfDoublesSketchToVariancesPostAggregator.class
+        PostAggregator.class
     );
 
     Assert.assertEquals(there, andBackAgain);