Aggregations: clean-up comparisons.

src/main/java/org/elasticsearch/common/util/CollectionUtils.java

@@ -28,10 +28,6 @@ import org.apache.lucene.util.IntroSorter;
 public enum CollectionUtils {
     ;
 
-    private static int compare(long i, long j) {
-        return i < j ? -1 : (i == j ? 0 : 1);
-    }
-
     public static void sort(LongArrayList list) {
         sort(list.buffer, list.size());
     }
@@ -50,7 +46,7 @@ public enum CollectionUtils {
 
             @Override
             protected int compare(int i, int j) {
-                return CollectionUtils.compare(array[i], array[j]);
+                return Comparators.compare(array[i], array[j]);
             }
 
             @Override
@@ -60,7 +56,7 @@ public enum CollectionUtils {
 
             @Override
             protected int comparePivot(int j) {
-                return CollectionUtils.compare(pivot, array[j]);
+                return Comparators.compare(pivot, array[j]);
             }
 
         }.sort(0, len);

src/main/java/org/elasticsearch/common/util/Comparators.java

@@ -0,0 +1,34 @@
+/*
+ * 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.common.util;
+
+/** Comparison utility methods. */
+public enum Comparators {
+    ;
+
+    public static int compare(long a, long b) {
+        return a < b ? -1 : a == b ? 0 : 1;
+    }
+
+    public static int compare(double a, double b, boolean asc) {
+        return asc ? Double.compare(a, b) : Double.compare(b, a);
+    }
+
+}

src/main/java/org/elasticsearch/search/aggregations/bucket/Bucket.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.search.aggregations.bucket;
 
 import org.elasticsearch.ElasticsearchIllegalArgumentException;
+import org.elasticsearch.common.util.Comparators;
 import org.elasticsearch.search.aggregations.Aggregations;
 import org.elasticsearch.search.aggregations.metrics.MetricsAggregation;
 
@@ -75,12 +76,7 @@ public interface Bucket {
         public int compare(B b1, B b2) {
             double v1 = value(b1);
             double v2 = value(b2);
-            if (v1 > v2) {
-                return asc ? 1 : -1;
-            } else if (v1 < v2) {
-                return asc ? -1 : 1;
-            }
-            return 0;
+            return Comparators.compare(v1, v2, asc);
         }
 
         private double value(B bucket) {

src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/HistogramBase.java

@@ -19,6 +19,7 @@
 
 package org.elasticsearch.search.aggregations.bucket.histogram;
 
+import org.elasticsearch.common.util.Comparators;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.search.aggregations.Aggregation;
 
@@ -61,33 +62,25 @@ interface HistogramBase<B extends HistogramBase.Bucket> extends Aggregation, Ite
         public static final Order KEY_ASC = new InternalOrder((byte) 1, "_key", true, new Comparator<HistogramBase.Bucket>() {
             @Override
             public int compare(HistogramBase.Bucket b1, HistogramBase.Bucket b2) {
-                if (b1.getKey() > b2.getKey()) {
-                    return 1;
-                }
-                if (b1.getKey() < b2.getKey()) {
-                    return -1;
-                }
-                return 0;
+                return Comparators.compare(b1.getKey(), b2.getKey());
             }
         });
 
         public static final Order KEY_DESC = new InternalOrder((byte) 2, "_key", false, new Comparator<HistogramBase.Bucket>() {
             @Override
             public int compare(HistogramBase.Bucket b1, HistogramBase.Bucket b2) {
-                return -KEY_ASC.comparator().compare(b1, b2);
+                return - Comparators.compare(b1.getKey(), b2.getKey());
             }
         });
 
         public static final Order COUNT_ASC = new InternalOrder((byte) 3, "_count", true, new Comparator<HistogramBase.Bucket>() {
             @Override
             public int compare(HistogramBase.Bucket b1, HistogramBase.Bucket b2) {
-                if (b1.getDocCount() > b2.getDocCount()) {
-                    return 1;
+                int cmp = Comparators.compare(b1.getDocCount(), b2.getDocCount());
+                if (cmp == 0) {
+                    cmp = Comparators.compare(b1.getKey(), b2.getKey());
                 }
-                if (b1.getDocCount() < b2.getDocCount()) {
-                    return -1;
-                }
-                return 0;
+                return cmp;
             }
         });
 
@@ -95,7 +88,11 @@ interface HistogramBase<B extends HistogramBase.Bucket> extends Aggregation, Ite
         public static final Order COUNT_DESC = new InternalOrder((byte) 4, "_count", false, new Comparator<HistogramBase.Bucket>() {
             @Override
             public int compare(HistogramBase.Bucket b1, HistogramBase.Bucket b2) {
-                return -COUNT_ASC.comparator().compare(b1, b2);
+                int cmp = - Comparators.compare(b1.getDocCount(), b2.getDocCount());
+                if (cmp == 0) {
+                    cmp = Comparators.compare(b1.getKey(), b2.getKey());
+                }
+                return cmp;
             }
         });
 

src/main/java/org/elasticsearch/search/aggregations/bucket/terms/DoubleTerms.java

@@ -79,15 +79,10 @@ public class DoubleTerms extends InternalTerms {
         }
 
         @Override
-        protected int compareTerm(Terms.Bucket other) {
-            if (term > other.getKeyAsNumber().doubleValue()) {
-                return 1;
-            }
-            if (term < other.getKeyAsNumber().doubleValue()) {
-                return -1;
-            }
-            return 0;
+        int compareTerm(Terms.Bucket other) {
+            return Double.compare(term, other.getKeyAsNumber().doubleValue());
         }
+
     }
 
     private ValueFormatter valueFormatter;

src/main/java/org/elasticsearch/search/aggregations/bucket/terms/InternalOrder.java

@@ -21,6 +21,7 @@ package org.elasticsearch.search.aggregations.bucket.terms;
 
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.util.Comparators;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.AggregationExecutionException;
 import org.elasticsearch.search.aggregations.Aggregator;
@@ -41,14 +42,11 @@ class InternalOrder extends Terms.Order {
     public static final InternalOrder COUNT_DESC = new InternalOrder((byte) 1, "_count", false, new Comparator<Terms.Bucket>() {
         @Override
         public int compare(Terms.Bucket o1, Terms.Bucket o2) {
-            long i = o2.getDocCount() - o1.getDocCount();
-            if (i == 0) {
-                i = o2.compareTo(o1);
-                if (i == 0) {
-                    i = System.identityHashCode(o2) - System.identityHashCode(o1);
-                }
+            int cmp = - Comparators.compare(o1.getDocCount(), o2.getDocCount());
+            if (cmp == 0) {
+                cmp = o1.compareTerm(o2);
             }
-            return i > 0 ? 1 : -1;
+            return cmp;
         }
     });
 
@@ -59,7 +57,11 @@ class InternalOrder extends Terms.Order {
 
         @Override
         public int compare(Terms.Bucket o1, Terms.Bucket o2) {
-            return -COUNT_DESC.comparator(null).compare(o1, o2);
+            int cmp = Comparators.compare(o1.getDocCount(), o2.getDocCount());
+            if (cmp == 0) {
+                cmp = o1.compareTerm(o2);
+            }
+            return cmp;
         }
     });
 
@@ -70,7 +72,7 @@ class InternalOrder extends Terms.Order {
 
         @Override
         public int compare(Terms.Bucket o1, Terms.Bucket o2) {
-            return o2.compareTo(o1);
+            return - o1.compareTerm(o2);
         }
     });
 
@@ -81,7 +83,7 @@ class InternalOrder extends Terms.Order {
 
         @Override
         public int compare(Terms.Bucket o1, Terms.Bucket o2) {
-            return -TERM_DESC.comparator(null).compare(o1, o2);
+            return o1.compareTerm(o2);
         }
     });
 

src/main/java/org/elasticsearch/search/aggregations/bucket/terms/InternalTerms.java

@@ -36,7 +36,7 @@ import java.util.*;
  */
 public abstract class InternalTerms extends InternalAggregation implements Terms, ToXContent, Streamable {
 
-    public static abstract class Bucket implements Terms.Bucket {
+    public static abstract class Bucket extends Terms.Bucket {
 
         long bucketOrd;
 
@@ -58,20 +58,6 @@ public abstract class InternalTerms extends InternalAggregation implements Terms
             return aggregations;
         }
 
-        @Override
-        public int compareTo(Terms.Bucket o) {
-            long i = compareTerm(o);
-            if (i == 0) {
-                i = docCount - o.getDocCount();
-                if (i == 0) {
-                    i = System.identityHashCode(this) - System.identityHashCode(o);
-                }
-            }
-            return i > 0 ? 1 : -1;
-        }
-
-        protected abstract int compareTerm(Terms.Bucket other);
-
         public Bucket reduce(List<? extends Bucket> buckets, CacheRecycler cacheRecycler) {
             if (buckets.size() == 1) {
                 return buckets.get(0);

src/main/java/org/elasticsearch/search/aggregations/bucket/terms/LongTerms.java

@@ -25,6 +25,7 @@ import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.recycler.Recycler;
 import org.elasticsearch.common.text.StringText;
 import org.elasticsearch.common.text.Text;
+import org.elasticsearch.common.util.Comparators;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.AggregationStreams;
 import org.elasticsearch.search.aggregations.InternalAggregation;
@@ -80,15 +81,8 @@ public class LongTerms extends InternalTerms {
         }
 
         @Override
-        protected int compareTerm(Terms.Bucket other) {
-            long otherTerm = other.getKeyAsNumber().longValue();
-            if (this.term > otherTerm) {
-                return 1;
-            }
-            if (this.term < otherTerm) {
-                return -1;
-            }
-            return 0;
+        int compareTerm(Terms.Bucket other) {
+            return Comparators.compare(term, other.getKeyAsNumber().longValue());
         }
     }
 

src/main/java/org/elasticsearch/search/aggregations/bucket/terms/StringTerms.java

@@ -77,7 +77,7 @@ public class StringTerms extends InternalTerms {
         }
 
         @Override
-        protected int compareTerm(Terms.Bucket other) {
+        int compareTerm(Terms.Bucket other) {
             return BytesRef.getUTF8SortedAsUnicodeComparator().compare(termBytes, ((Bucket) other).termBytes);
         }
     }

src/main/java/org/elasticsearch/search/aggregations/bucket/terms/Terms.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.search.aggregations.bucket.terms;
 
 import org.elasticsearch.common.text.Text;
+import org.elasticsearch.common.util.Comparators;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.search.aggregations.Aggregation;
 import org.elasticsearch.search.aggregations.Aggregator;
@@ -59,11 +60,14 @@ public interface Terms extends Aggregation, Iterable<Terms.Bucket> {
         }
     }
 
-    static interface Bucket extends Comparable<Bucket>, org.elasticsearch.search.aggregations.bucket.Bucket {
+    static abstract class Bucket implements org.elasticsearch.search.aggregations.bucket.Bucket {
 
-        Text getKey();
+        public abstract Text getKey();
+
+        public abstract Number getKeyAsNumber();
+
+        abstract int compareTerm(Terms.Bucket other);
 
-        Number getKeyAsNumber();
     }
 
     Collection<Bucket> buckets();

src/main/java/org/elasticsearch/search/aggregations/support/FieldDataSource.java

@@ -26,6 +26,7 @@ import org.apache.lucene.util.BytesRefHash;
 import org.apache.lucene.util.InPlaceMergeSorter;
 import org.elasticsearch.common.lucene.ReaderContextAware;
 import org.elasticsearch.common.util.CollectionUtils;
+import org.elasticsearch.common.util.Comparators;
 import org.elasticsearch.index.fielddata.*;
 import org.elasticsearch.index.fielddata.AtomicFieldData.Order;
 import org.elasticsearch.script.SearchScript;
@@ -632,7 +633,7 @@ public abstract class FieldDataSource {
                     protected int compare(int i, int j) {
                         final long l1 = array[i];
                         final long l2 = array[j];
-                        return l1 < l2 ? -1 : l1 == l2 ? 0 : 1;
+                        return Comparators.compare(l1, l2);
                     }
                 };