Add missing empty with comparator methods - fixes #1328

eclipse-collections-api/src/main/java/org/eclipse/collections/api/factory/map/sorted/MutableSortedMapFactory.java

@@ -22,6 +22,11 @@ public interface MutableSortedMapFactory
      */
     <K, V> MutableSortedMap<K, V> empty();
 
+    /**
+     * @since 12.0
+     */
+    <K, V> MutableSortedMap<K, V> empty(Comparator<? super K> comparator);
+
     /**
      * Same as {@link #empty()}.
      */

eclipse-collections-api/src/main/java/org/eclipse/collections/api/factory/set/sorted/MutableSortedSetFactory.java

@@ -21,6 +21,11 @@ public interface MutableSortedSetFactory
      */
     <T> MutableSortedSet<T> empty();
 
+    /**
+     * @since 12.0
+     */
+    <T> MutableSortedSet<T> empty(Comparator<? super T> comparator);
+
     /**
      * Same as {@link #empty()}.
      */

eclipse-collections/src/main/java/org/eclipse/collections/impl/map/sorted/mutable/MutableSortedMapFactoryImpl.java

@@ -27,6 +27,16 @@ public <K, V> MutableSortedMap<K, V> empty()
         return TreeSortedMap.newMap();
     }
 
+    @Override
+    public <K, V> MutableSortedMap<K, V> empty(Comparator<? super K> comparator)
+    {
+        if (comparator == null)
+        {
+            return this.of();
+        }
+        return TreeSortedMap.newMap(comparator);
+    }
+
     @Override
     public <K, V> MutableSortedMap<K, V> of()
     {
@@ -96,11 +106,7 @@ public <K, V> MutableSortedMap<K, V> of(Comparator<? super K> comparator)
     @Override
     public <K, V> MutableSortedMap<K, V> with(Comparator<? super K> comparator)
     {
-        if (comparator == null)
-        {
-            return this.of();
-        }
-        return TreeSortedMap.newMap(comparator);
+        return this.empty(comparator);
     }
 
     @Override

eclipse-collections/src/main/java/org/eclipse/collections/impl/set/sorted/mutable/MutableSortedSetFactoryImpl.java

@@ -25,6 +25,12 @@ public <T> MutableSortedSet<T> empty()
         return TreeSortedSet.newSet();
     }
 
+    @Override
+    public <T> MutableSortedSet<T> empty(Comparator<? super T> comparator)
+    {
+        return TreeSortedSet.newSet(comparator);
+    }
+
     @Override
     public <T> MutableSortedSet<T> of()
     {
@@ -71,7 +77,7 @@ public <T> MutableSortedSet<T> of(Comparator<? super T> comparator)
     @Override
     public <T> MutableSortedSet<T> with(Comparator<? super T> comparator)
     {
-        return TreeSortedSet.newSet(comparator);
+        return this.empty(comparator);
     }
 
     @Override

unit-tests/src/test/java/org/eclipse/collections/impl/factory/SortedMapsTest.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2022 Goldman Sachs and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v. 1.0 which accompany this distribution.
+ * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ */
+
+package org.eclipse.collections.impl.factory;
+
+import org.eclipse.collections.api.factory.map.sorted.MutableSortedMapFactory;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class SortedMapsTest
+{
+    @Test
+    public void mutables()
+    {
+        MutableSortedMapFactory factory = SortedMaps.mutable;
+        Assert.assertEquals(SortedMaps.mutable.empty(), factory.empty());
+        Assert.assertEquals(SortedMaps.mutable.empty(Integer::compare), factory.empty(Integer::compare));
+    }
+}

unit-tests/src/test/java/org/eclipse/collections/impl/factory/SortedSetsTest.java

@@ -64,6 +64,7 @@ public void immutables()
         Assert.assertEquals(SortedSets.mutable.of(1, 2, 3, 4, 5, 6, 7, 8), factory.ofSortedSet(SortedSets.immutable.of(1, 2, 3, 4, 5, 6, 7, 8).castToSortedSet()));
         Assert.assertEquals(SortedSets.mutable.of(1, 2, 3, 4, 5, 6, 7, 8), factory.ofSortedSet(SortedSets.immutable.of(Comparators.reverseNaturalOrder(), 1, 2, 3, 4, 5, 6, 7, 8).castToSortedSet()));
         Assert.assertEquals(SortedSets.mutable.empty(), factory.ofSortedSet(SortedSets.mutable.with()));
+        Assert.assertEquals(SortedSets.mutable.empty(Integer::compare), factory.ofSortedSet(SortedSets.mutable.with(Integer::compare)));
         Assert.assertEquals(SortedSets.mutable.of(1, 2, 3, 4, 5, 6, 7, 8), factory.ofSortedSet(SortedSets.mutable.of(1, 2, 3, 4, 5, 6, 7, 8)));
         Assert.assertEquals(SortedSets.mutable.of(1, 2, 3, 4, 5, 6, 7, 8), factory.ofSortedSet(SortedSets.mutable.of(Comparators.reverseNaturalOrder(), 1, 2, 3, 4, 5, 6, 7, 8)));
         Assert.assertEquals(SortedSets.immutable.empty(), SortedSets.immutable.ofAll(null, Lists.mutable.empty()));