Merge Percentile class with interface (#24154)

This commit merges the Percentile interface with the InternalPercentile
class, as we don't need to maintain both.

core/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/InternalPercentile.java

@@ -1,41 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch 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.elasticsearch.search.aggregations.metrics.percentiles;
-
-public class InternalPercentile implements Percentile {
-
-    private final double percent;
-    private final double value;
-
-    public InternalPercentile(double percent, double value) {
-        this.percent = percent;
-        this.value = value;
-    }
-
-    @Override
-    public double getPercent() {
-        return percent;
-    }
-
-    @Override
-    public double getValue() {
-        return value;
-    }
-}

core/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/Percentile.java

@@ -19,10 +19,41 @@
 
 package org.elasticsearch.search.aggregations.metrics.percentiles;
 
-public interface Percentile {
+import java.util.Objects;
 
-    double getPercent();
+public class Percentile {
 
-    double getValue();
+    private final double percent;
+    private final double value;
 
+    public Percentile(double percent, double value) {
+        this.percent = percent;
+        this.value = value;
+    }
+
+    public double getPercent() {
+        return percent;
+    }
+
+    public double getValue() {
+        return value;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Percentile that = (Percentile) o;
+        return Double.compare(that.percent, percent) == 0
+                && Double.compare(that.value, value) == 0;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(percent, value);
+    }
 }

core/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/hdr/InternalHDRPercentileRanks.java

@@ -21,7 +21,6 @@ package org.elasticsearch.search.aggregations.metrics.percentiles.hdr;
 import org.HdrHistogram.DoubleHistogram;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.search.DocValueFormat;
-import org.elasticsearch.search.aggregations.metrics.percentiles.InternalPercentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.PercentileRanks;
 import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
@@ -109,7 +108,7 @@ public class InternalHDRPercentileRanks extends AbstractInternalHDRPercentiles i
 
         @Override
         public Percentile next() {
-            final Percentile next = new InternalPercentile(percentileRank(state, values[i]), values[i]);
+            final Percentile next = new Percentile(percentileRank(state, values[i]), values[i]);
             ++i;
             return next;
         }

core/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/hdr/InternalHDRPercentiles.java

@@ -21,7 +21,6 @@ package org.elasticsearch.search.aggregations.metrics.percentiles.hdr;
 import org.HdrHistogram.DoubleHistogram;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.search.DocValueFormat;
-import org.elasticsearch.search.aggregations.metrics.percentiles.InternalPercentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentiles;
 import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
@@ -99,7 +98,7 @@ public class InternalHDRPercentiles extends AbstractInternalHDRPercentiles imple
 
         @Override
         public Percentile next() {
-            final Percentile next = new InternalPercentile(percents[i], state.getValueAtPercentile(percents[i]));
+            final Percentile next = new Percentile(percents[i], state.getValueAtPercentile(percents[i]));
             ++i;
             return next;
         }

core/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/tdigest/InternalTDigestPercentileRanks.java

@@ -20,7 +20,6 @@ package org.elasticsearch.search.aggregations.metrics.percentiles.tdigest;
 
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.search.DocValueFormat;
-import org.elasticsearch.search.aggregations.metrics.percentiles.InternalPercentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.PercentileRanks;
 import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
@@ -106,7 +105,7 @@ public class InternalTDigestPercentileRanks extends AbstractInternalTDigestPerce
 
         @Override
         public Percentile next() {
-            final Percentile next = new InternalPercentile(percentileRank(state, values[i]), values[i]);
+            final Percentile next = new Percentile(percentileRank(state, values[i]), values[i]);
             ++i;
             return next;
         }

core/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/tdigest/InternalTDigestPercentiles.java

@@ -20,7 +20,6 @@ package org.elasticsearch.search.aggregations.metrics.percentiles.tdigest;
 
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.search.DocValueFormat;
-import org.elasticsearch.search.aggregations.metrics.percentiles.InternalPercentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentiles;
 import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
@@ -95,7 +94,7 @@ public class InternalTDigestPercentiles extends AbstractInternalTDigestPercentil
 
         @Override
         public Percentile next() {
-            final Percentile next = new InternalPercentile(percents[i], state.quantile(percents[i] / 100));
+            final Percentile next = new Percentile(percents[i], state.quantile(percents[i] / 100));
             ++i;
             return next;
         }

core/src/main/java/org/elasticsearch/search/aggregations/pipeline/bucketmetrics/percentile/InternalPercentilesBucket.java

@@ -26,7 +26,6 @@ import org.elasticsearch.search.DocValueFormat;
 import org.elasticsearch.search.aggregations.InternalAggregation;
 import org.elasticsearch.search.aggregations.metrics.InternalNumericMetricsAggregation;
 import org.elasticsearch.search.aggregations.metrics.max.InternalMax;
-import org.elasticsearch.search.aggregations.metrics.percentiles.InternalPercentile;
 import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
 import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
 
@@ -136,7 +135,7 @@ public class InternalPercentilesBucket extends InternalNumericMetricsAggregation
 
         @Override
         public Percentile next() {
-            final Percentile next = new InternalPercentile(percents[i], percentiles[i]);
+            final Percentile next = new Percentile(percents[i], percentiles[i]);
             ++i;
             return next;
         }