#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 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.Collections;
using System;
using System.Linq;
namespace Google.Protobuf
{
internal interface IExtensionValue : IEquatable<IExtensionValue>, IDeepCloneable<IExtensionValue>
{
void MergeFrom(ref ParseContext ctx);
void MergeFrom(IExtensionValue value);
void WriteTo(ref WriteContext ctx);
int CalculateSize();
bool IsInitialized();
object GetValue();
}
internal sealed class ExtensionValue<T> : IExtensionValue
{
private T field;
private FieldCodec<T> codec;
internal ExtensionValue(FieldCodec<T> codec)
{
this.codec = codec;
field = codec.DefaultValue;
}
public int CalculateSize()
{
return codec.CalculateUnconditionalSizeWithTag(field);
}
public IExtensionValue Clone()
{
return new ExtensionValue<T>(codec)
{
field = field is IDeepCloneable<T> ? (field as IDeepCloneable<T>).Clone() : field
};
}
public bool Equals(IExtensionValue other)
{
if (ReferenceEquals(this, other))
return true;
return other is ExtensionValue<T>
&& codec.Equals((other as ExtensionValue<T>).codec)
&& Equals(field, (other as ExtensionValue<T>).field);
// we check for equality in the codec since we could have equal field values however the values could be written in different ways
}
public override int GetHashCode()
{
unchecked
{
int hash = 17;
hash = hash * 31 + field.GetHashCode();
hash = hash * 31 + codec.GetHashCode();
return hash;
}
}
public void MergeFrom(ref ParseContext ctx)
{
codec.ValueMerger(ref ctx, ref field);
}
public void MergeFrom(IExtensionValue value)
{
if (value is ExtensionValue<T>)
{
var extensionValue = value as ExtensionValue<T>;
codec.FieldMerger(ref field, extensionValue.field);
}
}
public void WriteTo(ref WriteContext ctx)
{
ctx.WriteTag(codec.Tag);
codec.ValueWriter(ref ctx, field);
if (codec.EndTag != 0)
{
ctx.WriteTag(codec.EndTag);
}
}
public T GetValue() => field;
object IExtensionValue.GetValue() => field;
public void SetValue(T value)
{
field = value;
}
public bool IsInitialized()
{
if (field is IMessage)
{
return (field as IMessage).IsInitialized();
}
else
{
return true;
}
}
}
internal sealed class RepeatedExtensionValue<T> : IExtensionValue
{
private RepeatedField<T> field;
private readonly FieldCodec<T> codec;
internal RepeatedExtensionValue(FieldCodec<T> codec)
{
this.codec = codec;
field = new RepeatedField<T>();
}
public int CalculateSize()
{
return field.CalculateSize(codec);
}
public IExtensionValue Clone()
{
return new RepeatedExtensionValue<T>(codec)
{
field = field.Clone()
};
}
public bool Equals(IExtensionValue other)
{
if (ReferenceEquals(this, other))
return true;
return other is RepeatedExtensionValue<T>
&& field.Equals((other as RepeatedExtensionValue<T>).field)
&& codec.Equals((other as RepeatedExtensionValue<T>).codec);
}
public override int GetHashCode()
{
unchecked
{
int hash = 17;
hash = hash * 31 + field.GetHashCode();
hash = hash * 31 + codec.GetHashCode();
return hash;
}
}
public void MergeFrom(ref ParseContext ctx)
{
field.AddEntriesFrom(ref ctx, codec);
}
public void MergeFrom(IExtensionValue value)
{
if (value is RepeatedExtensionValue<T>)
{
field.Add((value as RepeatedExtensionValue<T>).field);
}
}
public void WriteTo(ref WriteContext ctx)
{
field.WriteTo(ref ctx, codec);
}
public RepeatedField<T> GetValue() => field;
object IExtensionValue.GetValue() => field;
public bool IsInitialized()
{
for (int i = 0; i < field.Count; i++)
{
var element = field[i];
if (element is IMessage)
{
if (!(element as IMessage).IsInitialized())
{
return false;
}
}
else
{
break;
}
}
return true;
}
}
}
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