| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF 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. |
| |
| using System; |
| using System.Collections.Generic; |
| using Org.Apache.REEF.Utilities.Logging; |
| |
| namespace Org.Apache.REEF.Tang.Util |
| { |
| public sealed class MonotonicHashMap<T, U> : Dictionary<T, U> |
| { |
| private static readonly Logger LOGGER = Logger.GetLogger(typeof(MonotonicHashMap<T, U>)); |
| |
| public new void Add(T key, U value) |
| { |
| U old; |
| TryGetValue(key, out old); |
| if (old != null) |
| { |
| var ex = new ArgumentException("Attempt to re-add: [" + key + "] old value: " + old + " new value " + value); |
| Org.Apache.REEF.Utilities.Diagnostics.Exceptions.Throw(ex, LOGGER); |
| } |
| base.Add(key, value); |
| } |
| |
| public void AddAll(IDictionary<T, U> m) |
| { |
| foreach (T t in m.Keys) |
| { |
| if (ContainsKey(t)) |
| { |
| U old; |
| m.TryGetValue(t, out old); |
| Add(t, old); // guaranteed to throw. |
| } |
| } |
| foreach (T t in m.Keys) |
| { |
| U old; |
| m.TryGetValue(t, out old); |
| Add(t, old); |
| } |
| } |
| |
| public bool IsEmpty() |
| { |
| return Count == 0; |
| } |
| |
| public U Get(T key) |
| { |
| U val; |
| TryGetValue(key, out val); |
| return val; |
| } |
| |
| public new void Clear() |
| { |
| throw new NotSupportedException(); |
| } |
| |
| public new bool Remove(T key) |
| { |
| throw new NotSupportedException(); |
| } |
| } |
| } |