Move method to CollectionUtils to reduce number of source files

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

@@ -277,6 +277,11 @@ public enum CollectionUtils {
         }.sort(0, array.size());
     }
 
+    public static int[] toArray(Collection<Integer> ints) {
+        Objects.requireNonNull(ints);
+        return ints.stream().mapToInt(s -> s).toArray();
+    }
+
     private static class RotatedList<T> extends AbstractList<T> implements RandomAccess {
 
         private final List<T> in;

core/src/main/java/org/elasticsearch/common/util/primitives/Integers.java

@@ -1,30 +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.common.util.primitives;
-
-import java.util.Collection;
-import java.util.Objects;
-
-public class Integers {
-    public static int[] toArray(Collection<Integer> ints) {
-        Objects.requireNonNull(ints);
-        return ints.stream().mapToInt(s -> s).toArray();
-    }
-}

core/src/test/java/org/elasticsearch/test/discovery/ClusterDiscoveryConfiguration.java

@@ -23,7 +23,7 @@ import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.common.SuppressForbidden;
 import org.elasticsearch.common.network.NetworkUtils;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.common.util.primitives.Integers;
+import org.elasticsearch.common.util.CollectionUtils;
 import org.elasticsearch.test.InternalTestCluster;
 import org.elasticsearch.test.NodeConfigurationSource;
 
@@ -82,7 +82,7 @@ public class ClusterDiscoveryConfiguration extends NodeConfigurationSource {
                 while (ordinals.size() != numOfUnicastHosts) {
                     ordinals.add(RandomizedTest.randomInt(numOfNodes - 1));
                 }
-                unicastHostOrdinals = Integers.toArray(ordinals);
+                unicastHostOrdinals = CollectionUtils.toArray(ordinals);
             }
             this.unicastHostPorts = unicastHostPorts(numOfNodes);
             assert unicastHostOrdinals.length <= unicastHostPorts.length;