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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed 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;
using System.Collections.Generic;
namespace Google.ProtocolBuffers.Collections {
/// <summary>
/// Read-only wrapper around another dictionary.
/// </summary>
public sealed class ReadOnlyDictionary<TKey, TValue> : IDictionary<TKey, TValue> {
readonly IDictionary<TKey, TValue> wrapped;
public ReadOnlyDictionary(IDictionary<TKey, TValue> wrapped) {
this.wrapped = wrapped;
}
public void Add(TKey key, TValue value) {
throw new InvalidOperationException();
}
public bool ContainsKey(TKey key) {
return wrapped.ContainsKey(key);
}
public ICollection<TKey> Keys {
get { return wrapped.Keys; }
}
public bool Remove(TKey key) {
throw new InvalidOperationException();
}
public bool TryGetValue(TKey key, out TValue value) {
return wrapped.TryGetValue(key, out value);
}
public ICollection<TValue> Values {
get { return wrapped.Values; }
}
public TValue this[TKey key] {
get {
return wrapped[key];
}
set {
throw new InvalidOperationException();
}
}
public void Add(KeyValuePair<TKey, TValue> item) {
throw new InvalidOperationException();
}
public void Clear() {
throw new InvalidOperationException();
}
public bool Contains(KeyValuePair<TKey, TValue> item) {
return wrapped.Contains(item);
}
public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex) {
wrapped.CopyTo(array, arrayIndex);
}
public int Count {
get { return wrapped.Count; }
}
public bool IsReadOnly {
get { return true; }
}
public bool Remove(KeyValuePair<TKey, TValue> item) {
throw new InvalidOperationException();
}
public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator() {
return wrapped.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator() {
return ((IEnumerable) wrapped).GetEnumerator();
}
public override bool Equals(object obj) {
return wrapped.Equals(obj);
}
public override int GetHashCode() {
return wrapped.GetHashCode();
}
public override string ToString() {
return wrapped.ToString();
}
}
}
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