| #region Copyright notice and license |
| // Protocol Buffers - Google's data interchange format |
| // Copyright 2015 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| #endregion |
| |
| using Google.Protobuf.Compatibility; |
| using Google.Protobuf.Reflection; |
| using System; |
| using System.Collections; |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Linq; |
| |
| namespace Google.Protobuf.Collections |
| { |
| /// <summary> |
| /// Representation of a map field in a Protocol Buffer message. |
| /// </summary> |
| /// <typeparam name="TKey">Key type in the map. Must be a type supported by Protocol Buffer map keys.</typeparam> |
| /// <typeparam name="TValue">Value type in the map. Must be a type supported by Protocol Buffers.</typeparam> |
| /// <remarks> |
| /// <para> |
| /// For string keys, the equality comparison is provided by <see cref="StringComparer.Ordinal" />. |
| /// </para> |
| /// <para> |
| /// Null values are not permitted in the map, either for wrapper types or regular messages. |
| /// If a map is deserialized from a data stream and the value is missing from an entry, a default value |
| /// is created instead. For primitive types, that is the regular default value (0, the empty string and so |
| /// on); for message types, an empty instance of the message is created, as if the map entry contained a 0-length |
| /// encoded value for the field. |
| /// </para> |
| /// <para> |
| /// This implementation does not generally prohibit the use of key/value types which are not |
| /// supported by Protocol Buffers (e.g. using a key type of <code>byte</code>) but nor does it guarantee |
| /// that all operations will work in such cases. |
| /// </para> |
| /// <para> |
| /// The order in which entries are returned when iterating over this object is undefined, and may change |
| /// in future versions. |
| /// </para> |
| /// </remarks> |
| public sealed class MapField<TKey, TValue> : IDeepCloneable<MapField<TKey, TValue>>, IDictionary<TKey, TValue>, IEquatable<MapField<TKey, TValue>>, IDictionary |
| #if !NET35 |
| , IReadOnlyDictionary<TKey, TValue> |
| #endif |
| { |
| private static readonly EqualityComparer<TValue> ValueEqualityComparer = ProtobufEqualityComparers.GetEqualityComparer<TValue>(); |
| private static readonly EqualityComparer<TKey> KeyEqualityComparer = ProtobufEqualityComparers.GetEqualityComparer<TKey>(); |
| |
| // TODO: Don't create the map/list until we have an entry. (Assume many maps will be empty.) |
| private readonly Dictionary<TKey, LinkedListNode<KeyValuePair<TKey, TValue>>> map = |
| new Dictionary<TKey, LinkedListNode<KeyValuePair<TKey, TValue>>>(KeyEqualityComparer); |
| private readonly LinkedList<KeyValuePair<TKey, TValue>> list = new LinkedList<KeyValuePair<TKey, TValue>>(); |
| |
| /// <summary> |
| /// Creates a deep clone of this object. |
| /// </summary> |
| /// <returns> |
| /// A deep clone of this object. |
| /// </returns> |
| public MapField<TKey, TValue> Clone() |
| { |
| var clone = new MapField<TKey, TValue>(); |
| // Keys are never cloneable. Values might be. |
| if (typeof(IDeepCloneable<TValue>).IsAssignableFrom(typeof(TValue))) |
| { |
| foreach (var pair in list) |
| { |
| clone.Add(pair.Key, ((IDeepCloneable<TValue>)pair.Value).Clone()); |
| } |
| } |
| else |
| { |
| // Nothing is cloneable, so we don't need to worry. |
| clone.Add(this); |
| } |
| return clone; |
| } |
| |
| /// <summary> |
| /// Adds the specified key/value pair to the map. |
| /// </summary> |
| /// <remarks> |
| /// This operation fails if the key already exists in the map. To replace an existing entry, use the indexer. |
| /// </remarks> |
| /// <param name="key">The key to add</param> |
| /// <param name="value">The value to add.</param> |
| /// <exception cref="System.ArgumentException">The given key already exists in map.</exception> |
| public void Add(TKey key, TValue value) |
| { |
| // Validation of arguments happens in ContainsKey and the indexer |
| if (ContainsKey(key)) |
| { |
| throw new ArgumentException("Key already exists in map", nameof(key)); |
| } |
| this[key] = value; |
| } |
| |
| /// <summary> |
| /// Determines whether the specified key is present in the map. |
| /// </summary> |
| /// <param name="key">The key to check.</param> |
| /// <returns><c>true</c> if the map contains the given key; <c>false</c> otherwise.</returns> |
| public bool ContainsKey(TKey key) |
| { |
| ProtoPreconditions.CheckNotNullUnconstrained(key, nameof(key)); |
| return map.ContainsKey(key); |
| } |
| |
| private bool ContainsValue(TValue value) => |
| list.Any(pair => ValueEqualityComparer.Equals(pair.Value, value)); |
| |
| /// <summary> |
| /// Removes the entry identified by the given key from the map. |
| /// </summary> |
| /// <param name="key">The key indicating the entry to remove from the map.</param> |
| /// <returns><c>true</c> if the map contained the given key before the entry was removed; <c>false</c> otherwise.</returns> |
| public bool Remove(TKey key) |
| { |
| ProtoPreconditions.CheckNotNullUnconstrained(key, nameof(key)); |
| LinkedListNode<KeyValuePair<TKey, TValue>> node; |
| if (map.TryGetValue(key, out node)) |
| { |
| map.Remove(key); |
| node.List.Remove(node); |
| return true; |
| } |
| else |
| { |
| return false; |
| } |
| } |
| |
| /// <summary> |
| /// Gets the value associated with the specified key. |
| /// </summary> |
| /// <param name="key">The key whose value to get.</param> |
| /// <param name="value">When this method returns, the value associated with the specified key, if the key is found; |
| /// otherwise, the default value for the type of the <paramref name="value"/> parameter. |
| /// This parameter is passed uninitialized.</param> |
| /// <returns><c>true</c> if the map contains an element with the specified key; otherwise, <c>false</c>.</returns> |
| public bool TryGetValue(TKey key, out TValue value) |
| { |
| LinkedListNode<KeyValuePair<TKey, TValue>> node; |
| if (map.TryGetValue(key, out node)) |
| { |
| value = node.Value.Value; |
| return true; |
| } |
| else |
| { |
| value = default(TValue); |
| return false; |
| } |
| } |
| |
| /// <summary> |
| /// Gets or sets the value associated with the specified key. |
| /// </summary> |
| /// <param name="key">The key of the value to get or set.</param> |
| /// <exception cref="KeyNotFoundException">The property is retrieved and key does not exist in the collection.</exception> |
| /// <returns>The value associated with the specified key. If the specified key is not found, |
| /// a get operation throws a <see cref="KeyNotFoundException"/>, and a set operation creates a new element with the specified key.</returns> |
| public TValue this[TKey key] |
| { |
| get |
| { |
| ProtoPreconditions.CheckNotNullUnconstrained(key, nameof(key)); |
| TValue value; |
| if (TryGetValue(key, out value)) |
| { |
| return value; |
| } |
| throw new KeyNotFoundException(); |
| } |
| set |
| { |
| ProtoPreconditions.CheckNotNullUnconstrained(key, nameof(key)); |
| // value == null check here is redundant, but avoids boxing. |
| if (value == null) |
| { |
| ProtoPreconditions.CheckNotNullUnconstrained(value, nameof(value)); |
| } |
| LinkedListNode<KeyValuePair<TKey, TValue>> node; |
| var pair = new KeyValuePair<TKey, TValue>(key, value); |
| if (map.TryGetValue(key, out node)) |
| { |
| node.Value = pair; |
| } |
| else |
| { |
| node = list.AddLast(pair); |
| map[key] = node; |
| } |
| } |
| } |
| |
| /// <summary> |
| /// Gets a collection containing the keys in the map. |
| /// </summary> |
| public ICollection<TKey> Keys { get { return new MapView<TKey>(this, pair => pair.Key, ContainsKey); } } |
| |
| /// <summary> |
| /// Gets a collection containing the values in the map. |
| /// </summary> |
| public ICollection<TValue> Values { get { return new MapView<TValue>(this, pair => pair.Value, ContainsValue); } } |
| |
| /// <summary> |
| /// Adds the specified entries to the map. The keys and values are not automatically cloned. |
| /// </summary> |
| /// <param name="entries">The entries to add to the map.</param> |
| public void Add(IDictionary<TKey, TValue> entries) |
| { |
| ProtoPreconditions.CheckNotNull(entries, nameof(entries)); |
| foreach (var pair in entries) |
| { |
| Add(pair.Key, pair.Value); |
| } |
| } |
| |
| /// <summary> |
| /// Returns an enumerator that iterates through the collection. |
| /// </summary> |
| /// <returns> |
| /// An enumerator that can be used to iterate through the collection. |
| /// </returns> |
| public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator() |
| { |
| return list.GetEnumerator(); |
| } |
| |
| /// <summary> |
| /// Returns an enumerator that iterates through a collection. |
| /// </summary> |
| /// <returns> |
| /// An <see cref="T:System.Collections.IEnumerator" /> object that can be used to iterate through the collection. |
| /// </returns> |
| IEnumerator IEnumerable.GetEnumerator() |
| { |
| return GetEnumerator(); |
| } |
| |
| /// <summary> |
| /// Adds the specified item to the map. |
| /// </summary> |
| /// <param name="item">The item to add to the map.</param> |
| void ICollection<KeyValuePair<TKey, TValue>>.Add(KeyValuePair<TKey, TValue> item) |
| { |
| Add(item.Key, item.Value); |
| } |
| |
| /// <summary> |
| /// Removes all items from the map. |
| /// </summary> |
| public void Clear() |
| { |
| list.Clear(); |
| map.Clear(); |
| } |
| |
| /// <summary> |
| /// Determines whether map contains an entry equivalent to the given key/value pair. |
| /// </summary> |
| /// <param name="item">The key/value pair to find.</param> |
| /// <returns></returns> |
| bool ICollection<KeyValuePair<TKey, TValue>>.Contains(KeyValuePair<TKey, TValue> item) |
| { |
| TValue value; |
| return TryGetValue(item.Key, out value) && ValueEqualityComparer.Equals(item.Value, value); |
| } |
| |
| /// <summary> |
| /// Copies the key/value pairs in this map to an array. |
| /// </summary> |
| /// <param name="array">The array to copy the entries into.</param> |
| /// <param name="arrayIndex">The index of the array at which to start copying values.</param> |
| void ICollection<KeyValuePair<TKey, TValue>>.CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex) |
| { |
| list.CopyTo(array, arrayIndex); |
| } |
| |
| /// <summary> |
| /// Removes the specified key/value pair from the map. |
| /// </summary> |
| /// <remarks>Both the key and the value must be found for the entry to be removed.</remarks> |
| /// <param name="item">The key/value pair to remove.</param> |
| /// <returns><c>true</c> if the key/value pair was found and removed; <c>false</c> otherwise.</returns> |
| bool ICollection<KeyValuePair<TKey, TValue>>.Remove(KeyValuePair<TKey, TValue> item) |
| { |
| if (item.Key == null) |
| { |
| throw new ArgumentException("Key is null", nameof(item)); |
| } |
| LinkedListNode<KeyValuePair<TKey, TValue>> node; |
| if (map.TryGetValue(item.Key, out node) && |
| EqualityComparer<TValue>.Default.Equals(item.Value, node.Value.Value)) |
| { |
| map.Remove(item.Key); |
| node.List.Remove(node); |
| return true; |
| } |
| else |
| { |
| return false; |
| } |
| } |
| |
| /// <summary> |
| /// Gets the number of elements contained in the map. |
| /// </summary> |
| public int Count { get { return list.Count; } } |
| |
| /// <summary> |
| /// Gets a value indicating whether the map is read-only. |
| /// </summary> |
| public bool IsReadOnly { get { return false; } } |
| |
| /// <summary> |
| /// Determines whether the specified <see cref="System.Object" />, is equal to this instance. |
| /// </summary> |
| /// <param name="other">The <see cref="System.Object" /> to compare with this instance.</param> |
| /// <returns> |
| /// <c>true</c> if the specified <see cref="System.Object" /> is equal to this instance; otherwise, <c>false</c>. |
| /// </returns> |
| public override bool Equals(object other) |
| { |
| return Equals(other as MapField<TKey, TValue>); |
| } |
| |
| /// <summary> |
| /// Returns a hash code for this instance. |
| /// </summary> |
| /// <returns> |
| /// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table. |
| /// </returns> |
| public override int GetHashCode() |
| { |
| var keyComparer = KeyEqualityComparer; |
| var valueComparer = ValueEqualityComparer; |
| int hash = 0; |
| foreach (var pair in list) |
| { |
| hash ^= keyComparer.GetHashCode(pair.Key) * 31 + valueComparer.GetHashCode(pair.Value); |
| } |
| return hash; |
| } |
| |
| /// <summary> |
| /// Compares this map with another for equality. |
| /// </summary> |
| /// <remarks> |
| /// The order of the key/value pairs in the maps is not deemed significant in this comparison. |
| /// </remarks> |
| /// <param name="other">The map to compare this with.</param> |
| /// <returns><c>true</c> if <paramref name="other"/> refers to an equal map; <c>false</c> otherwise.</returns> |
| public bool Equals(MapField<TKey, TValue> other) |
| { |
| if (other == null) |
| { |
| return false; |
| } |
| if (other == this) |
| { |
| return true; |
| } |
| if (other.Count != this.Count) |
| { |
| return false; |
| } |
| var valueComparer = ValueEqualityComparer; |
| foreach (var pair in this) |
| { |
| TValue value; |
| if (!other.TryGetValue(pair.Key, out value)) |
| { |
| return false; |
| } |
| if (!valueComparer.Equals(value, pair.Value)) |
| { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /// <summary> |
| /// Adds entries to the map from the given stream. |
| /// </summary> |
| /// <remarks> |
| /// It is assumed that the stream is initially positioned after the tag specified by the codec. |
| /// This method will continue reading entries from the stream until the end is reached, or |
| /// a different tag is encountered. |
| /// </remarks> |
| /// <param name="input">Stream to read from</param> |
| /// <param name="codec">Codec describing how the key/value pairs are encoded</param> |
| public void AddEntriesFrom(CodedInputStream input, Codec codec) |
| { |
| var adapter = new Codec.MessageAdapter(codec); |
| do |
| { |
| adapter.Reset(); |
| input.ReadMessage(adapter); |
| this[adapter.Key] = adapter.Value; |
| } while (input.MaybeConsumeTag(codec.MapTag)); |
| } |
| |
| /// <summary> |
| /// Writes the contents of this map to the given coded output stream, using the specified codec |
| /// to encode each entry. |
| /// </summary> |
| /// <param name="output">The output stream to write to.</param> |
| /// <param name="codec">The codec to use for each entry.</param> |
| public void WriteTo(CodedOutputStream output, Codec codec) |
| { |
| var message = new Codec.MessageAdapter(codec); |
| foreach (var entry in list) |
| { |
| message.Key = entry.Key; |
| message.Value = entry.Value; |
| output.WriteTag(codec.MapTag); |
| output.WriteMessage(message); |
| } |
| } |
| |
| /// <summary> |
| /// Calculates the size of this map based on the given entry codec. |
| /// </summary> |
| /// <param name="codec">The codec to use to encode each entry.</param> |
| /// <returns></returns> |
| public int CalculateSize(Codec codec) |
| { |
| if (Count == 0) |
| { |
| return 0; |
| } |
| var message = new Codec.MessageAdapter(codec); |
| int size = 0; |
| foreach (var entry in list) |
| { |
| message.Key = entry.Key; |
| message.Value = entry.Value; |
| size += CodedOutputStream.ComputeRawVarint32Size(codec.MapTag); |
| size += CodedOutputStream.ComputeMessageSize(message); |
| } |
| return size; |
| } |
| |
| /// <summary> |
| /// Returns a string representation of this repeated field, in the same |
| /// way as it would be represented by the default JSON formatter. |
| /// </summary> |
| public override string ToString() |
| { |
| var writer = new StringWriter(); |
| JsonFormatter.Default.WriteDictionary(writer, this); |
| return writer.ToString(); |
| } |
| |
| #region IDictionary explicit interface implementation |
| void IDictionary.Add(object key, object value) |
| { |
| Add((TKey)key, (TValue)value); |
| } |
| |
| bool IDictionary.Contains(object key) |
| { |
| if (!(key is TKey)) |
| { |
| return false; |
| } |
| return ContainsKey((TKey)key); |
| } |
| |
| IDictionaryEnumerator IDictionary.GetEnumerator() |
| { |
| return new DictionaryEnumerator(GetEnumerator()); |
| } |
| |
| void IDictionary.Remove(object key) |
| { |
| ProtoPreconditions.CheckNotNull(key, nameof(key)); |
| if (!(key is TKey)) |
| { |
| return; |
| } |
| Remove((TKey)key); |
| } |
| |
| void ICollection.CopyTo(Array array, int index) |
| { |
| // This is ugly and slow as heck, but with any luck it will never be used anyway. |
| ICollection temp = this.Select(pair => new DictionaryEntry(pair.Key, pair.Value)).ToList(); |
| temp.CopyTo(array, index); |
| } |
| |
| bool IDictionary.IsFixedSize { get { return false; } } |
| |
| ICollection IDictionary.Keys { get { return (ICollection)Keys; } } |
| |
| ICollection IDictionary.Values { get { return (ICollection)Values; } } |
| |
| bool ICollection.IsSynchronized { get { return false; } } |
| |
| object ICollection.SyncRoot { get { return this; } } |
| |
| object IDictionary.this[object key] |
| { |
| get |
| { |
| ProtoPreconditions.CheckNotNull(key, nameof(key)); |
| if (!(key is TKey)) |
| { |
| return null; |
| } |
| TValue value; |
| TryGetValue((TKey)key, out value); |
| return value; |
| } |
| |
| set |
| { |
| this[(TKey)key] = (TValue)value; |
| } |
| } |
| #endregion |
| |
| #region IReadOnlyDictionary explicit interface implementation |
| #if !NET35 |
| IEnumerable<TKey> IReadOnlyDictionary<TKey, TValue>.Keys => Keys; |
| |
| IEnumerable<TValue> IReadOnlyDictionary<TKey, TValue>.Values => Values; |
| #endif |
| #endregion |
| |
| private class DictionaryEnumerator : IDictionaryEnumerator |
| { |
| private readonly IEnumerator<KeyValuePair<TKey, TValue>> enumerator; |
| |
| internal DictionaryEnumerator(IEnumerator<KeyValuePair<TKey, TValue>> enumerator) |
| { |
| this.enumerator = enumerator; |
| } |
| |
| public bool MoveNext() |
| { |
| return enumerator.MoveNext(); |
| } |
| |
| public void Reset() |
| { |
| enumerator.Reset(); |
| } |
| |
| public object Current { get { return Entry; } } |
| public DictionaryEntry Entry { get { return new DictionaryEntry(Key, Value); } } |
| public object Key { get { return enumerator.Current.Key; } } |
| public object Value { get { return enumerator.Current.Value; } } |
| } |
| |
| /// <summary> |
| /// A codec for a specific map field. This contains all the information required to encode and |
| /// decode the nested messages. |
| /// </summary> |
| public sealed class Codec |
| { |
| private readonly FieldCodec<TKey> keyCodec; |
| private readonly FieldCodec<TValue> valueCodec; |
| private readonly uint mapTag; |
| |
| /// <summary> |
| /// Creates a new entry codec based on a separate key codec and value codec, |
| /// and the tag to use for each map entry. |
| /// </summary> |
| /// <param name="keyCodec">The key codec.</param> |
| /// <param name="valueCodec">The value codec.</param> |
| /// <param name="mapTag">The map tag to use to introduce each map entry.</param> |
| public Codec(FieldCodec<TKey> keyCodec, FieldCodec<TValue> valueCodec, uint mapTag) |
| { |
| this.keyCodec = keyCodec; |
| this.valueCodec = valueCodec; |
| this.mapTag = mapTag; |
| } |
| |
| /// <summary> |
| /// The tag used in the enclosing message to indicate map entries. |
| /// </summary> |
| internal uint MapTag { get { return mapTag; } } |
| |
| /// <summary> |
| /// A mutable message class, used for parsing and serializing. This |
| /// delegates the work to a codec, but implements the <see cref="IMessage"/> interface |
| /// for interop with <see cref="CodedInputStream"/> and <see cref="CodedOutputStream"/>. |
| /// This is nested inside Codec as it's tightly coupled to the associated codec, |
| /// and it's simpler if it has direct access to all its fields. |
| /// </summary> |
| internal class MessageAdapter : IMessage |
| { |
| private static readonly byte[] ZeroLengthMessageStreamData = new byte[] { 0 }; |
| |
| private readonly Codec codec; |
| internal TKey Key { get; set; } |
| internal TValue Value { get; set; } |
| |
| internal MessageAdapter(Codec codec) |
| { |
| this.codec = codec; |
| } |
| |
| internal void Reset() |
| { |
| Key = codec.keyCodec.DefaultValue; |
| Value = codec.valueCodec.DefaultValue; |
| } |
| |
| public void MergeFrom(CodedInputStream input) |
| { |
| uint tag; |
| while ((tag = input.ReadTag()) != 0) |
| { |
| if (tag == codec.keyCodec.Tag) |
| { |
| Key = codec.keyCodec.Read(input); |
| } |
| else if (tag == codec.valueCodec.Tag) |
| { |
| Value = codec.valueCodec.Read(input); |
| } |
| else |
| { |
| input.SkipLastField(); |
| } |
| } |
| |
| // Corner case: a map entry with a key but no value, where the value type is a message. |
| // Read it as if we'd seen an input stream with no data (i.e. create a "default" message). |
| if (Value == null) |
| { |
| Value = codec.valueCodec.Read(new CodedInputStream(ZeroLengthMessageStreamData)); |
| } |
| } |
| |
| public void WriteTo(CodedOutputStream output) |
| { |
| codec.keyCodec.WriteTagAndValue(output, Key); |
| codec.valueCodec.WriteTagAndValue(output, Value); |
| } |
| |
| public int CalculateSize() |
| { |
| return codec.keyCodec.CalculateSizeWithTag(Key) + codec.valueCodec.CalculateSizeWithTag(Value); |
| } |
| |
| MessageDescriptor IMessage.Descriptor { get { return null; } } |
| } |
| } |
| |
| private class MapView<T> : ICollection<T>, ICollection |
| { |
| private readonly MapField<TKey, TValue> parent; |
| private readonly Func<KeyValuePair<TKey, TValue>, T> projection; |
| private readonly Func<T, bool> containsCheck; |
| |
| internal MapView( |
| MapField<TKey, TValue> parent, |
| Func<KeyValuePair<TKey, TValue>, T> projection, |
| Func<T, bool> containsCheck) |
| { |
| this.parent = parent; |
| this.projection = projection; |
| this.containsCheck = containsCheck; |
| } |
| |
| public int Count { get { return parent.Count; } } |
| |
| public bool IsReadOnly { get { return true; } } |
| |
| public bool IsSynchronized { get { return false; } } |
| |
| public object SyncRoot { get { return parent; } } |
| |
| public void Add(T item) |
| { |
| throw new NotSupportedException(); |
| } |
| |
| public void Clear() |
| { |
| throw new NotSupportedException(); |
| } |
| |
| public bool Contains(T item) |
| { |
| return containsCheck(item); |
| } |
| |
| public void CopyTo(T[] array, int arrayIndex) |
| { |
| if (arrayIndex < 0) |
| { |
| throw new ArgumentOutOfRangeException(nameof(arrayIndex)); |
| } |
| if (arrayIndex + Count > array.Length) |
| { |
| throw new ArgumentException("Not enough space in the array", nameof(array)); |
| } |
| foreach (var item in this) |
| { |
| array[arrayIndex++] = item; |
| } |
| } |
| |
| public IEnumerator<T> GetEnumerator() |
| { |
| return parent.list.Select(projection).GetEnumerator(); |
| } |
| |
| public bool Remove(T item) |
| { |
| throw new NotSupportedException(); |
| } |
| |
| IEnumerator IEnumerable.GetEnumerator() |
| { |
| return GetEnumerator(); |
| } |
| |
| public void CopyTo(Array array, int index) |
| { |
| if (index < 0) |
| { |
| throw new ArgumentOutOfRangeException(nameof(index)); |
| } |
| if (index + Count > array.Length) |
| { |
| throw new ArgumentException("Not enough space in the array", nameof(array)); |
| } |
| foreach (var item in this) |
| { |
| array.SetValue(item, index++); |
| } |
| } |
| } |
| } |
| } |
