1 files changed, 69 insertions, 0 deletions
diff --git a/Mammoth/Couscous/java/util/HashMap.cs b/Mammoth/Couscous/java/util/HashMap.cs
new file mode 100644
index 0000000..38e516e
--- /dev/null
+++ b/Mammoth/Couscous/java/util/HashMap.cs
@@ -0,0 +1,69 @@
+using System.Collections.Generic;
+using System.Linq;
+using Mammoth.Couscous.org.zwobble.mammoth.@internal.util;
+using Mammoth.Couscous.java.lang;
+
+namespace Mammoth.Couscous.java.util {
+    internal class HashMap<TKey, TValue> : Map<TKey, TValue> {
+        private readonly IDictionary<TKey, TValue> _dictionary;
+        
+        internal HashMap() : this(new Dictionary<TKey, TValue>()) {
+        }
+        
+        internal HashMap(IDictionary<TKey, TValue> dictionary) {
+            _dictionary = dictionary;
+        }
+        
+        public void put(TKey key, TValue value) {
+            _dictionary[key] = value;
+        }
+        
+        public bool containsKey(TKey key) {
+            return _dictionary.ContainsKey(key);
+        }
+        
+        public Set<Map__Entry<TKey, TValue>> entrySet() {
+            return new EntrySet(_dictionary);
+        }
+        
+        public Optional<TValue> _lookup(TKey key) {
+            if (_dictionary.ContainsKey(key)) {
+                return new Some<TValue>(_dictionary[key]);
+            } else {
+                return new None<TValue>();
+            }
+        }
+        
+        public IDictionary<TKey, TValue> AsDictionary() {
+            return _dictionary;
+        }
+        
+        internal class EntrySet : Set<Map__Entry<TKey, TValue>> {
+            private readonly IDictionary<TKey, TValue> _dictionary;
+            
+            internal EntrySet(IDictionary<TKey, TValue> dictionary) {
+                _dictionary = dictionary;
+            }
+            
+            public Iterator<Map__Entry<TKey, TValue>> iterator() {
+                return ToJava.EnumeratorToIterator(_dictionary.Select(entry => Maps.entry(entry.Key, entry.Value)).GetEnumerator());
+            }
+            
+            public bool isEmpty() {
+                return _dictionary.Count == 0;
+            }
+            
+            public int size() {
+                return _dictionary.Count;
+            }
+            
+            public bool contains(object value) {
+                return value is TKey && _dictionary.ContainsKey((TKey) value);
+            }
+            
+            public void add(Map__Entry<TKey, TValue> value) {
+                throw new UnsupportedOperationException();
+            }
+        }
+    }
+}