#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// http://github.com/jskeet/dotnet-protobufs/
// Original C++/Java/Python code:
// http://code.google.com/p/protobuf/
//
// 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 System.Collections;
using System.Collections.Generic;
using Google.ProtocolBuffers.Descriptors;
namespace Google.ProtocolBuffers
{
public interface IGeneratedExtensionLite
{
int Number { get; }
object ContainingType { get; }
IMessageLite MessageDefaultInstance { get; }
IFieldDescriptorLite Descriptor { get; }
}
public class ExtensionDescriptorLite : IFieldDescriptorLite
{
private readonly string fullName;
private readonly IEnumLiteMap enumTypeMap;
private readonly int number;
private readonly FieldType type;
private readonly bool isRepeated;
private readonly bool isPacked;
private readonly MappedType mapType;
private readonly object defaultValue;
public ExtensionDescriptorLite(string fullName, IEnumLiteMap enumTypeMap, int number, FieldType type,
object defaultValue, bool isRepeated, bool isPacked)
{
this.fullName = fullName;
this.enumTypeMap = enumTypeMap;
this.number = number;
this.type = type;
this.mapType = FieldMappingAttribute.MappedTypeFromFieldType(type);
this.isRepeated = isRepeated;
this.isPacked = isPacked;
this.defaultValue = defaultValue;
}
public string Name
{
get
{
string name = fullName;
int offset = name.LastIndexOf('.');
if (offset >= 0)
{
name = name.Substring(offset);
}
return name;
}
}
public string FullName
{
get { return fullName; }
}
public bool IsRepeated
{
get { return isRepeated; }
}
public bool IsRequired
{
get { return false; }
}
public bool IsPacked
{
get { return isPacked; }
}
public bool IsExtension
{
get { return true; }
}
/// <summary>
/// This is not supported and assertions are made to ensure this does not exist on extensions of Lite types
/// </summary>
public bool MessageSetWireFormat
{
get { return false; }
}
public int FieldNumber
{
get { return number; }
}
public IEnumLiteMap EnumType
{
get { return enumTypeMap; }
}
public FieldType FieldType
{
get { return type; }
}
public MappedType MappedType
{
get { return mapType; }
}
public object DefaultValue
{
get { return defaultValue; }
}
public int CompareTo(IFieldDescriptorLite other)
{
return FieldNumber.CompareTo(other.FieldNumber);
}
}
public class GeneratedRepeatExtensionLite<TContainingType, TExtensionType> :
GeneratedExtensionLite<TContainingType, IList<TExtensionType>>
where TContainingType : IMessageLite
{
public GeneratedRepeatExtensionLite(string fullName, TContainingType containingTypeDefaultInstance,
IMessageLite messageDefaultInstance, IEnumLiteMap enumTypeMap, int number,
FieldType type, bool isPacked) :
base(
fullName, containingTypeDefaultInstance, new List<TExtensionType>(),
messageDefaultInstance, enumTypeMap, number, type, isPacked)
{
}
public override object ToReflectionType(object value)
{
IList<object> result = new List<object>();
foreach (object element in (IEnumerable) value)
{
result.Add(SingularToReflectionType(element));
}
return result;
}
public override object FromReflectionType(object value)
{
// Must convert the whole list.
List<TExtensionType> result = new List<TExtensionType>();
foreach (object element in (IEnumerable) value)
{
result.Add((TExtensionType) SingularFromReflectionType(element));
}
return result;
}
}
public class GeneratedExtensionLite<TContainingType, TExtensionType> : IGeneratedExtensionLite
where TContainingType : IMessageLite
{
private readonly TContainingType containingTypeDefaultInstance;
private readonly TExtensionType defaultValue;
private readonly IMessageLite messageDefaultInstance;
private readonly ExtensionDescriptorLite descriptor;
// We can't always initialize a GeneratedExtension when we first construct
// it due to initialization order difficulties (namely, the default
// instances may not have been constructed yet). So, we construct an
// uninitialized GeneratedExtension once, then call internalInit() on it
// later. Generated code will always call internalInit() on all extensions
// as part of the static initialization code, and internalInit() throws an
// exception if called more than once, so this method is useless to users.
protected GeneratedExtensionLite(
TContainingType containingTypeDefaultInstance,
TExtensionType defaultValue,
IMessageLite messageDefaultInstance,
ExtensionDescriptorLite descriptor)
{
this.containingTypeDefaultInstance = containingTypeDefaultInstance;
this.messageDefaultInstance = messageDefaultInstance;
this.defaultValue = defaultValue;
this.descriptor = descriptor;
}
/** For use by generated code only. */
public GeneratedExtensionLite(
string fullName,
TContainingType containingTypeDefaultInstance,
TExtensionType defaultValue,
IMessageLite messageDefaultInstance,
IEnumLiteMap enumTypeMap,
int number,
FieldType type)
: this(containingTypeDefaultInstance, defaultValue, messageDefaultInstance,
new ExtensionDescriptorLite(fullName, enumTypeMap, number, type, defaultValue,
false /* isRepeated */, false /* isPacked */))
{
}
private static readonly IList<object> Empty = new object[0];
/** Repeating fields: For use by generated code only. */
protected GeneratedExtensionLite(
string fullName,
TContainingType containingTypeDefaultInstance,
TExtensionType defaultValue,
IMessageLite messageDefaultInstance,
IEnumLiteMap enumTypeMap,
int number,
FieldType type,
bool isPacked)
: this(containingTypeDefaultInstance, defaultValue, messageDefaultInstance,
new ExtensionDescriptorLite(fullName, enumTypeMap, number, type, Empty,
true /* isRepeated */, isPacked))
{
}
/// <summary>
/// Returns information about this extension
/// </summary>
public IFieldDescriptorLite Descriptor
{
get { return descriptor; }
}
/// <summary>
/// Returns the default value for this extension
/// </summary>
public TExtensionType DefaultValue
{
get { return defaultValue; }
}
/// <summary>
/// used for the extension registry
/// </summary>
object IGeneratedExtensionLite.ContainingType
{
get { return ContainingTypeDefaultInstance; }
}
/**
* Default instance of the type being extended, used to identify that type.
*/
public TContainingType ContainingTypeDefaultInstance
{
get { return containingTypeDefaultInstance; }
}
/** Get the field number. */
public int Number
{
get { return descriptor.FieldNumber; }
}
/**
* If the extension is an embedded message, this is the default instance of
* that type.
*/
public IMessageLite MessageDefaultInstance
{
get { return messageDefaultInstance; }
}
/// <summary>
/// Converts from the type used by the native accessors to the type
/// used by reflection accessors. For example, the reflection accessors
/// for enums use EnumValueDescriptors but the native accessors use
/// the generated enum type.
/// </summary>
public virtual object ToReflectionType(object value)
{
return SingularToReflectionType(value);
}
/// <summary>
/// Like ToReflectionType(object) but for a single element.
/// </summary>
public object SingularToReflectionType(object value)
{
return descriptor.MappedType == MappedType.Enum
? descriptor.EnumType.FindValueByNumber((int) value)
: value;
}
public virtual object FromReflectionType(object value)
{
return SingularFromReflectionType(value);
}
public object SingularFromReflectionType(object value)
{
switch (Descriptor.MappedType)
{
case MappedType.Message:
if (value is TExtensionType)
{
return value;
}
else
{
// It seems the copy of the embedded message stored inside the
// extended message is not of the exact type the user was
// expecting. This can happen if a user defines a
// GeneratedExtension manually and gives it a different type.
// This should not happen in normal use. But, to be nice, we'll
// copy the message to whatever type the caller was expecting.
return MessageDefaultInstance.WeakCreateBuilderForType()
.WeakMergeFrom((IMessageLite) value).WeakBuild();
}
case MappedType.Enum:
// Just return a boxed int - that can be unboxed to the enum
IEnumLite enumValue = (IEnumLite) value;
return enumValue.Number;
default:
return value;
}
}
}
}
