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CollectionFormatter.cs
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CollectionFormatter.cs
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
#if NETSTANDARD1_4
using System.Collections.Concurrent;
#endif
namespace MessagePack.Formatters
{
public class ArrayFormatter<T> : IMessagePackFormatter<T[]>
{
public int Serialize(ref byte[] bytes, int offset, T[] value, IFormatterResolver formatterResolver)
{
if (value == null)
{
return MessagePackBinary.WriteNil(ref bytes, offset);
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<T>();
offset += MessagePackBinary.WriteArrayHeader(ref bytes, offset, value.Length);
for (int i = 0; i < value.Length; i++)
{
offset += formatter.Serialize(ref bytes, offset, value[i], formatterResolver);
}
return offset - startOffset;
}
}
public T[] Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
if (MessagePackBinary.IsNil(bytes, offset))
{
readSize = 1;
return null;
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<T>();
var len = MessagePackBinary.ReadArrayHeader(bytes, offset, out readSize);
offset += readSize;
var array = new T[len];
for (int i = 0; i < array.Length; i++)
{
array[i] = formatter.Deserialize(bytes, offset, formatterResolver, out readSize);
offset += readSize;
}
readSize = offset - startOffset;
return array;
}
}
}
public class ByteArraySegmentFormatter : IMessagePackFormatter<ArraySegment<byte>>
{
public static readonly ByteArraySegmentFormatter Instance = new ByteArraySegmentFormatter();
ByteArraySegmentFormatter()
{
}
public int Serialize(ref byte[] bytes, int offset, ArraySegment<byte> value, IFormatterResolver formatterResolver)
{
if (value.Array == null)
{
return MessagePackBinary.WriteNil(ref bytes, offset);
}
else
{
return MessagePackBinary.WriteBytes(ref bytes, offset, value.Array, value.Offset, value.Count);
}
}
public ArraySegment<byte> Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
if (MessagePackBinary.IsNil(bytes, offset))
{
readSize = 1;
return default(ArraySegment<byte>);
}
else
{
var binary = MessagePackBinary.ReadBytes(bytes, offset, out readSize);
return new ArraySegment<byte>(binary, 0, binary.Length);
}
}
}
public class ArraySegmentFormatter<T> : IMessagePackFormatter<ArraySegment<T>>
{
public int Serialize(ref byte[] bytes, int offset, ArraySegment<T> value, IFormatterResolver formatterResolver)
{
if (value.Array == null)
{
return MessagePackBinary.WriteNil(ref bytes, offset);
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<T>();
offset += MessagePackBinary.WriteArrayHeader(ref bytes, offset, value.Count);
var array = value.Array;
for (int i = 0; i < value.Count; i++)
{
var item = array[value.Offset + i];
offset += formatter.Serialize(ref bytes, offset, item, formatterResolver);
}
return offset - startOffset;
}
}
public ArraySegment<T> Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
if (MessagePackBinary.IsNil(bytes, offset))
{
readSize = 1;
return default(ArraySegment<T>);
}
else
{
var array = formatterResolver.GetFormatterWithVerify<T[]>().Deserialize(bytes, offset, formatterResolver, out readSize);
return new ArraySegment<T>(array, 0, array.Length);
}
}
}
// List<T> is popular format, should avoid abstraction.
public class ListFormatter<T> : IMessagePackFormatter<List<T>>
{
public int Serialize(ref byte[] bytes, int offset, List<T> value, IFormatterResolver formatterResolver)
{
if (value == null)
{
return MessagePackBinary.WriteNil(ref bytes, offset);
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<T>();
var c = value.Count;
offset += MessagePackBinary.WriteArrayHeader(ref bytes, offset, c);
for (int i = 0; i < c; i++)
{
offset += formatter.Serialize(ref bytes, offset, value[i], formatterResolver);
}
return offset - startOffset;
}
}
public List<T> Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
if (MessagePackBinary.IsNil(bytes, offset))
{
readSize = 1;
return null;
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<T>();
var len = MessagePackBinary.ReadArrayHeader(bytes, offset, out readSize);
offset += readSize;
var list = new List<T>(len);
for (int i = 0; i < len; i++)
{
list.Add(formatter.Deserialize(bytes, offset, formatterResolver, out readSize));
offset += readSize;
}
readSize = offset - startOffset;
return list;
}
}
}
public abstract class CollectionFormatterBase<TElement, TIntermediate, TEnumerator, TCollection> : IMessagePackFormatter<TCollection>
where TCollection : IEnumerable<TElement>
where TEnumerator : IEnumerator<TElement>
{
public int Serialize(ref byte[] bytes, int offset, TCollection value, IFormatterResolver formatterResolver)
{
if (value == null)
{
return MessagePackBinary.WriteNil(ref bytes, offset);
}
else
{
// Optimize iteration(array is fastest)
var array = value as TElement[];
if (array != null)
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<TElement>();
offset += MessagePackBinary.WriteArrayHeader(ref bytes, offset, array.Length);
foreach (var item in array)
{
offset += formatter.Serialize(ref bytes, offset, item, formatterResolver);
}
return offset - startOffset;
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<TElement>();
// knows count or not.
var seqCount = GetCount(value);
if (seqCount != null)
{
offset += MessagePackBinary.WriteArrayHeader(ref bytes, offset, seqCount.Value);
// Unity's foreach struct enumerator causes boxing so iterate manually.
var e = GetSourceEnumerator(value);
try
{
while (e.MoveNext())
{
#if NETSTANDARD1_4
offset += formatter.Serialize(ref bytes, offset, e.Current, formatterResolver);
#else
offset += formatter.Serialize(ref bytes, (int)offset, (TElement)e.Current, (IFormatterResolver)formatterResolver);
#endif
}
}
finally
{
e.Dispose();
}
return offset - startOffset;
}
else
{
// write message first -> open header space -> write header
var writeStarOffset = offset;
var count = 0;
var moveCount = 0;
// count = 16 <= 65535, header len is "3" so choose default space.
offset += 3;
var e = GetSourceEnumerator(value);
try
{
while (e.MoveNext())
{
count++;
#if NETSTANDARD1_4
var writeSize = formatter.Serialize(ref bytes, offset, e.Current, formatterResolver);
#else
var writeSize = formatter.Serialize(ref bytes, (int)offset, (TElement)e.Current, (IFormatterResolver)formatterResolver);
#endif
moveCount += writeSize;
offset += writeSize;
}
}
finally
{
e.Dispose();
}
var headerLength = MessagePackBinary.GetArrayHeaderLength(count);
if (headerLength != 3)
{
if (headerLength == 1) offset -= 2; // 1
else offset += 2; // 5
MessagePackBinary.EnsureCapacity(ref bytes, offset, headerLength);
Buffer.BlockCopy(bytes, writeStarOffset + 3, bytes, writeStarOffset + headerLength, moveCount);
}
MessagePackBinary.WriteArrayHeader(ref bytes, writeStarOffset, count);
return offset - startOffset;
}
}
}
}
public TCollection Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
if (MessagePackBinary.IsNil(bytes, offset))
{
readSize = 1;
return default(TCollection);
}
else
{
var startOffset = offset;
var formatter = formatterResolver.GetFormatterWithVerify<TElement>();
var len = MessagePackBinary.ReadArrayHeader(bytes, offset, out readSize);
offset += readSize;
var list = Create(len);
for (int i = 0; i < len; i++)
{
Add(list, i, formatter.Deserialize(bytes, offset, formatterResolver, out readSize));
offset += readSize;
}
readSize = offset - startOffset;
return Complete(list);
}
}
// abstraction for serialize
protected virtual int? GetCount(TCollection sequence)
{
var collection = sequence as ICollection<TElement>;
if (collection != null)
{
return collection.Count;
}
#if NETSTANDARD1_4
else
{
var c2 = sequence as IReadOnlyCollection<TElement>;
if (c2 != null)
{
return c2.Count;
}
}
#endif
return null;
}
// Some collections can use struct iterator, this is optimization path
protected abstract TEnumerator GetSourceEnumerator(TCollection source);
// abstraction for deserialize
protected abstract TIntermediate Create(int count);
protected abstract void Add(TIntermediate collection, int index, TElement value);
protected abstract TCollection Complete(TIntermediate intermediateCollection);
}
public abstract class CollectionFormatterBase<TElement, TIntermediate, TCollection> : CollectionFormatterBase<TElement, TIntermediate, IEnumerator<TElement>, TCollection>
where TCollection : IEnumerable<TElement>
{
protected override IEnumerator<TElement> GetSourceEnumerator(TCollection source)
{
return source.GetEnumerator();
}
}
public abstract class CollectionFormatterBase<TElement, TCollection> : CollectionFormatterBase<TElement, TCollection, TCollection>
where TCollection : IEnumerable<TElement>
{
protected sealed override TCollection Complete(TCollection intermediateCollection)
{
return intermediateCollection;
}
}
public class GenericCollectionFormatter<TElement, TCollection> : CollectionFormatterBase<TElement, TCollection>
where TCollection : ICollection<TElement>, new()
{
protected override TCollection Create(int count)
{
return new TCollection();
}
protected override void Add(TCollection collection, int index, TElement value)
{
collection.Add(value);
}
}
public class LinkedListFormatter<T> : CollectionFormatterBase<T, LinkedList<T>, LinkedList<T>.Enumerator, LinkedList<T>>
{
protected override void Add(LinkedList<T> collection, int index, T value)
{
collection.AddLast(value);
}
protected override LinkedList<T> Complete(LinkedList<T> intermediateCollection)
{
return intermediateCollection;
}
protected override LinkedList<T> Create(int count)
{
return new LinkedList<T>();
}
protected override LinkedList<T>.Enumerator GetSourceEnumerator(LinkedList<T> source)
{
return source.GetEnumerator();
}
}
public class QeueueFormatter<T> : CollectionFormatterBase<T, Queue<T>, Queue<T>.Enumerator, Queue<T>>
{
protected override int? GetCount(Queue<T> sequence)
{
return sequence.Count;
}
protected override void Add(Queue<T> collection, int index, T value)
{
collection.Enqueue(value);
}
protected override Queue<T> Create(int count)
{
return new Queue<T>(count);
}
protected override Queue<T>.Enumerator GetSourceEnumerator(Queue<T> source)
{
return source.GetEnumerator();
}
protected override Queue<T> Complete(Queue<T> intermediateCollection)
{
return intermediateCollection;
}
}
// should deserialize reverse order.
public class StackFormatter<T> : CollectionFormatterBase<T, T[], Stack<T>.Enumerator, Stack<T>>
{
protected override int? GetCount(Stack<T> sequence)
{
return sequence.Count;
}
protected override void Add(T[] collection, int index, T value)
{
// add reverse
collection[collection.Length - 1 - index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override Stack<T>.Enumerator GetSourceEnumerator(Stack<T> source)
{
return source.GetEnumerator();
}
protected override Stack<T> Complete(T[] intermediateCollection)
{
return new Stack<T>(intermediateCollection);
}
}
public class HashSetFormatter<T> : CollectionFormatterBase<T, HashSet<T>, HashSet<T>.Enumerator, HashSet<T>>
{
protected override int? GetCount(HashSet<T> sequence)
{
return sequence.Count;
}
protected override void Add(HashSet<T> collection, int index, T value)
{
collection.Add(value);
}
protected override HashSet<T> Complete(HashSet<T> intermediateCollection)
{
return intermediateCollection;
}
protected override HashSet<T> Create(int count)
{
return new HashSet<T>();
}
protected override HashSet<T>.Enumerator GetSourceEnumerator(HashSet<T> source)
{
return source.GetEnumerator();
}
}
public class ReadOnlyCollectionFormatter<T> : CollectionFormatterBase<T, T[], ReadOnlyCollection<T>>
{
protected override void Add(T[] collection, int index, T value)
{
collection[index] = value;
}
protected override ReadOnlyCollection<T> Complete(T[] intermediateCollection)
{
return new ReadOnlyCollection<T>(intermediateCollection);
}
protected override T[] Create(int count)
{
return new T[count];
}
}
public class InterfaceListFormatter<T> : CollectionFormatterBase<T, T[], IList<T>>
{
protected override void Add(T[] collection, int index, T value)
{
collection[index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override IList<T> Complete(T[] intermediateCollection)
{
return intermediateCollection;
}
}
public class InterfaceCollectionFormatter<T> : CollectionFormatterBase<T, T[], ICollection<T>>
{
protected override void Add(T[] collection, int index, T value)
{
collection[index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override ICollection<T> Complete(T[] intermediateCollection)
{
return intermediateCollection;
}
}
public class InterfaceEnumerableFormatter<T> : CollectionFormatterBase<T, T[], IEnumerable<T>>
{
protected override void Add(T[] collection, int index, T value)
{
collection[index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override IEnumerable<T> Complete(T[] intermediateCollection)
{
return intermediateCollection;
}
}
// [Key, [Array]]
public class InterfaceGroupingFormatter<TKey, TElement> : IMessagePackFormatter<IGrouping<TKey, TElement>>
{
public int Serialize(ref byte[] bytes, int offset, IGrouping<TKey, TElement> value, IFormatterResolver formatterResolver)
{
if (value == null)
{
return MessagePackBinary.WriteNil(ref bytes, offset);
}
else
{
var startOffset = offset;
offset += MessagePackBinary.WriteArrayHeader(ref bytes, offset, 2);
offset += formatterResolver.GetFormatterWithVerify<TKey>().Serialize(ref bytes, offset, value.Key, formatterResolver);
offset += formatterResolver.GetFormatterWithVerify<IEnumerable<TElement>>().Serialize(ref bytes, offset, value, formatterResolver);
return offset - startOffset;
}
}
public IGrouping<TKey, TElement> Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
if (MessagePackBinary.IsNil(bytes, offset))
{
readSize = 1;
return null;
}
else
{
var startOffset = offset;
var count = MessagePackBinary.ReadArrayHeader(bytes, offset, out readSize);
offset += readSize;
if (count != 2) throw new InvalidOperationException("Invalid Grouping format.");
var key = formatterResolver.GetFormatterWithVerify<TKey>().Deserialize(bytes, offset, formatterResolver, out readSize);
offset += readSize;
var value = formatterResolver.GetFormatterWithVerify<IEnumerable<TElement>>().Deserialize(bytes, offset, formatterResolver, out readSize);
offset += readSize;
readSize = offset - startOffset;
return new Grouping<TKey, TElement>(key, value);
}
}
}
public class InterfaceLookupFormatter<TKey, TElement> : CollectionFormatterBase<IGrouping<TKey, TElement>, Dictionary<TKey, IGrouping<TKey, TElement>>, ILookup<TKey, TElement>>
{
protected override void Add(Dictionary<TKey, IGrouping<TKey, TElement>> collection, int index, IGrouping<TKey, TElement> value)
{
collection.Add(value.Key, value);
}
protected override ILookup<TKey, TElement> Complete(Dictionary<TKey, IGrouping<TKey, TElement>> intermediateCollection)
{
return new Lookup<TKey, TElement>(intermediateCollection);
}
protected override Dictionary<TKey, IGrouping<TKey, TElement>> Create(int count)
{
return new Dictionary<TKey, IGrouping<TKey, TElement>>(count);
}
}
class Grouping<TKey, TElement> : IGrouping<TKey, TElement>
{
readonly TKey key;
readonly IEnumerable<TElement> elements;
public Grouping(TKey key, IEnumerable<TElement> elements)
{
this.key = key;
this.elements = elements;
}
public TKey Key
{
get
{
return key;
}
}
public IEnumerator<TElement> GetEnumerator()
{
return elements.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return elements.GetEnumerator();
}
}
class Lookup<TKey, TElement> : ILookup<TKey, TElement>
{
readonly Dictionary<TKey, IGrouping<TKey, TElement>> groupings;
public Lookup(Dictionary<TKey, IGrouping<TKey, TElement>> groupings)
{
this.groupings = groupings;
}
public IEnumerable<TElement> this[TKey key]
{
get
{
return groupings[key];
}
}
public int Count
{
get
{
return groupings.Count;
}
}
public bool Contains(TKey key)
{
return groupings.ContainsKey(key);
}
public IEnumerator<IGrouping<TKey, TElement>> GetEnumerator()
{
return groupings.Values.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return groupings.Values.GetEnumerator();
}
}
#if NETSTANDARD1_4
public class ObservableCollectionFormatter<T> : CollectionFormatterBase<T, ObservableCollection<T>>
{
protected override void Add(ObservableCollection<T> collection, int index, T value)
{
collection.Add(value);
}
protected override ObservableCollection<T> Create(int count)
{
return new ObservableCollection<T>();
}
}
public class ReadOnlyObservableCollectionFormatter<T> : CollectionFormatterBase<T, ObservableCollection<T>, ReadOnlyObservableCollection<T>>
{
protected override void Add(ObservableCollection<T> collection, int index, T value)
{
collection.Add(value);
}
protected override ObservableCollection<T> Create(int count)
{
return new ObservableCollection<T>();
}
protected override ReadOnlyObservableCollection<T> Complete(ObservableCollection<T> intermediateCollection)
{
return new ReadOnlyObservableCollection<T>(intermediateCollection);
}
}
public class InterfaceReadOnlyListFormatter<T> : CollectionFormatterBase<T, T[], IReadOnlyList<T>>
{
protected override void Add(T[] collection, int index, T value)
{
collection[index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override IReadOnlyList<T> Complete(T[] intermediateCollection)
{
return intermediateCollection;
}
}
public class InterfaceReadOnlyCollectionFormatter<T> : CollectionFormatterBase<T, T[], IReadOnlyCollection<T>>
{
protected override void Add(T[] collection, int index, T value)
{
collection[index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override IReadOnlyCollection<T> Complete(T[] intermediateCollection)
{
return intermediateCollection;
}
}
public class InterfaceSetFormatter<T> : CollectionFormatterBase<T, HashSet<T>, ISet<T>>
{
protected override void Add(HashSet<T> collection, int index, T value)
{
collection.Add(value);
}
protected override ISet<T> Complete(HashSet<T> intermediateCollection)
{
return intermediateCollection;
}
protected override HashSet<T> Create(int count)
{
return new HashSet<T>();
}
}
public class ConcurrentBagFormatter<T> : CollectionFormatterBase<T, System.Collections.Concurrent.ConcurrentBag<T>>
{
protected override int? GetCount(ConcurrentBag<T> sequence)
{
return sequence.Count;
}
protected override void Add(ConcurrentBag<T> collection, int index, T value)
{
collection.Add(value);
}
protected override ConcurrentBag<T> Create(int count)
{
return new ConcurrentBag<T>();
}
}
public class ConcurrentQueueFormatter<T> : CollectionFormatterBase<T, System.Collections.Concurrent.ConcurrentQueue<T>>
{
protected override int? GetCount(ConcurrentQueue<T> sequence)
{
return sequence.Count;
}
protected override void Add(ConcurrentQueue<T> collection, int index, T value)
{
collection.Enqueue(value);
}
protected override ConcurrentQueue<T> Create(int count)
{
return new ConcurrentQueue<T>();
}
}
public class ConcurrentStackFormatter<T> : CollectionFormatterBase<T, T[], ConcurrentStack<T>>
{
protected override int? GetCount(ConcurrentStack<T> sequence)
{
return sequence.Count;
}
protected override void Add(T[] collection, int index, T value)
{
// add reverse
collection[collection.Length - 1 - index] = value;
}
protected override T[] Create(int count)
{
return new T[count];
}
protected override ConcurrentStack<T> Complete(T[] intermediateCollection)
{
return new ConcurrentStack<T>(intermediateCollection);
}
}
#endif
}