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using System;
using System.Collections;
using ProtoBuf.Meta;
namespace ProtoBuf.Serializers
{
internal sealed class ArrayDecorator : ProtoDecoratorBase
{
public override Type ExpectedType
{
get
{
return this.arrayType;
}
}
public override bool RequiresOldValue
{
get
{
return this.AppendToCollection;
}
}
public override bool ReturnsValue
{
get
{
return true;
}
}
private bool AppendToCollection
{
get
{
return (this.options & 2) == 0;
}
}
private bool SupportNull
{
get
{
return (this.options & 4) > 0;
}
}
private readonly int fieldNumber;
private const byte OPTIONS_WritePacked = 1;
private const byte OPTIONS_OverwriteList = 2;
private const byte OPTIONS_SupportNull = 4;
private readonly byte options;
private readonly WireType packedWireType;
private readonly Type arrayType;
private readonly Type itemType;
public ArrayDecorator(TypeModel model, IProtoSerializer tail, int fieldNumber, bool writePacked, WireType packedWireType, Type arrayType, bool overwriteList, bool supportNull) : base(tail)
{
Helpers.DebugAssert(arrayType != null, "arrayType should be non-null");
Helpers.DebugAssert(arrayType.IsArray && arrayType.GetArrayRank() == 1, "should be single-dimension array; " + arrayType.FullName);
this.itemType = arrayType.GetElementType();
Type type = supportNull ? this.itemType : (Helpers.GetUnderlyingType(this.itemType) ?? this.itemType);
Helpers.DebugAssert(type == this.Tail.ExpectedType, "invalid tail");
Helpers.DebugAssert(this.Tail.ExpectedType != model.MapType(typeof(byte)), "Should have used BlobSerializer");
bool flag = (writePacked || packedWireType != WireType.None) && fieldNumber <= 0;
if (flag)
{
throw new ArgumentOutOfRangeException("fieldNumber");
}
bool flag2 = !ListDecorator.CanPack(packedWireType);
if (flag2)
{
if (writePacked)
{
throw new InvalidOperationException("Only simple data-types can use packed encoding");
}
packedWireType = WireType.None;
}
this.fieldNumber = fieldNumber;
this.packedWireType = packedWireType;
if (writePacked)
{
this.options |= 1;
}
if (overwriteList)
{
this.options |= 2;
}
if (supportNull)
{
this.options |= 4;
}
this.arrayType = arrayType;
}
public override void Write(object value, ProtoWriter dest)
{
IList list = (IList)value;
int count = list.Count;
bool flag = (this.options & 1) > 0;
bool flag2 = flag;
SubItemToken token;
if (flag2)
{
ProtoWriter.WriteFieldHeader(this.fieldNumber, WireType.String, dest);
token = ProtoWriter.StartSubItem(value, dest);
ProtoWriter.SetPackedField(this.fieldNumber, dest);
}
else
{
token = default(SubItemToken);
}
bool flag3 = !this.SupportNull;
for (int i = 0; i < count; i++)
{
object obj = list[i];
bool flag4 = flag3 && obj == null;
if (flag4)
{
throw new NullReferenceException();
}
this.Tail.Write(obj, dest);
}
bool flag5 = flag;
if (flag5)
{
ProtoWriter.EndSubItem(token, dest);
}
}
public override object Read(object value, ProtoReader source)
{
int field = source.FieldNumber;
BasicList basicList = new BasicList();
bool flag = this.packedWireType != WireType.None && source.WireType == WireType.String;
if (flag)
{
SubItemToken token = ProtoReader.StartSubItem(source);
while (ProtoReader.HasSubValue(this.packedWireType, source))
{
basicList.Add(this.Tail.Read(null, source));
}
ProtoReader.EndSubItem(token, source);
}
else
{
do
{
basicList.Add(this.Tail.Read(null, source));
}
while (source.TryReadFieldHeader(field));
}
int num = this.AppendToCollection ? ((value == null) ? 0 : ((Array)value).Length) : 0;
Array array = Array.CreateInstance(this.itemType, num + basicList.Count);
bool flag2 = num != 0;
if (flag2)
{
((Array)value).CopyTo(array, 0);
}
basicList.CopyTo(array, num);
return array;
}
}
}
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