#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;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using Google.ProtocolBuffers.Collections;
namespace Google.ProtocolBuffers
{
public abstract partial class ExtendableMessageLite<TMessage, TBuilder> : GeneratedMessageLite<TMessage, TBuilder>
where TMessage : GeneratedMessageLite<TMessage, TBuilder>
where TBuilder : GeneratedBuilderLite<TMessage, TBuilder>
{
protected ExtendableMessageLite()
{
}
private readonly FieldSet extensions = FieldSet.CreateInstance();
/// <summary>
/// Access for the builder.
/// </summary>
internal FieldSet Extensions
{
get { return extensions; }
}
public override bool Equals(object obj)
{
ExtendableMessageLite<TMessage, TBuilder> other = obj as ExtendableMessageLite<TMessage, TBuilder>;
return !ReferenceEquals(null, other) &&
Dictionaries.Equals(extensions.AllFields, other.extensions.AllFields);
}
public override int GetHashCode()
{
return Dictionaries.GetHashCode(extensions.AllFields);
}
/// <summary>
/// writes the extensions to the text stream
/// </summary>
public override void PrintTo(TextWriter writer)
{
foreach (KeyValuePair<IFieldDescriptorLite, object> entry in extensions.AllFields)
{
string fn = string.Format("[{0}]", entry.Key.FullName);
if (entry.Key.IsRepeated)
{
foreach (object o in ((IEnumerable) entry.Value))
{
PrintField(fn, true, o, writer);
}
}
else
{
PrintField(fn, true, entry.Value, writer);
}
}
}
/// <summary>
/// Checks if a singular extension is present.
/// </summary>
public bool HasExtension<TExtension>(GeneratedExtensionLite<TMessage, TExtension> extension)
{
VerifyExtensionContainingType(extension);
return extensions.HasField(extension.Descriptor);
}
/// <summary>
/// Returns the number of elements in a repeated extension.
/// </summary>
public int GetExtensionCount<TExtension>(GeneratedExtensionLite<TMessage, IList<TExtension>> extension)
{
VerifyExtensionContainingType(extension);
return extensions.GetRepeatedFieldCount(extension.Descriptor);
}
/// <summary>
/// Returns the value of an extension.
/// </summary>
public TExtension GetExtension<TExtension>(GeneratedExtensionLite<TMessage, TExtension> extension)
{
VerifyExtensionContainingType(extension);
object value = extensions[extension.Descriptor];
if (value == null)
{
return extension.DefaultValue;
}
else
{
return (TExtension) extension.FromReflectionType(value);
}
}
/// <summary>
/// Returns one element of a repeated extension.
/// </summary>
public TExtension GetExtension<TExtension>(GeneratedExtensionLite<TMessage, IList<TExtension>> extension,
int index)
{
VerifyExtensionContainingType(extension);
return (TExtension) extension.SingularFromReflectionType(extensions[extension.Descriptor, index]);
}
/// <summary>
/// Called to check if all extensions are initialized.
/// </summary>
protected bool ExtensionsAreInitialized
{
get { return extensions.IsInitialized; }
}
public override bool IsInitialized
{
get { return ExtensionsAreInitialized; }
}
/// <summary>
/// Used by subclasses to serialize extensions. Extension ranges may be
/// interleaves with field numbers, but we must write them in canonical
/// (sorted by field number) order. This class helps us to write individual
/// ranges of extensions at once.
///
/// TODO(jonskeet): See if we can improve this in terms of readability.
/// </summary>
protected class ExtensionWriter
{
private readonly IEnumerator<KeyValuePair<IFieldDescriptorLite, object>> iterator;
private readonly FieldSet extensions;
private KeyValuePair<IFieldDescriptorLite, object>? next = null;
internal ExtensionWriter(ExtendableMessageLite<TMessage, TBuilder> message)
{
extensions = message.extensions;
iterator = message.extensions.GetEnumerator();
if (iterator.MoveNext())
{
next = iterator.Current;
}
}
public void WriteUntil(int end, ICodedOutputStream output)
{
while (next != null && next.Value.Key.FieldNumber < end)
{
extensions.WriteField(next.Value.Key, next.Value.Value, output);
if (iterator.MoveNext())
{
next = iterator.Current;
}
else
{
next = null;
}
}
}
}
protected ExtensionWriter CreateExtensionWriter(ExtendableMessageLite<TMessage, TBuilder> message)
{
return new ExtensionWriter(message);
}
/// <summary>
/// Called by subclasses to compute the size of extensions.
/// </summary>
protected int ExtensionsSerializedSize
{
get { return extensions.SerializedSize; }
}
internal void VerifyExtensionContainingType<TExtension>(GeneratedExtensionLite<TMessage, TExtension> extension)
{
if (!ReferenceEquals(extension.ContainingTypeDefaultInstance, DefaultInstanceForType))
{
// This can only happen if someone uses unchecked operations.
throw new ArgumentException(
String.Format("Extension is for type \"{0}\" which does not match message type \"{1}\".",
extension.ContainingTypeDefaultInstance, DefaultInstanceForType
));
}
}
}
}
