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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
using System.Collections;
using System.Collections.Generic;
using System.IO;
using Google.ProtocolBuffers.Collections;
using Google.ProtocolBuffers.Descriptors;
namespace Google.ProtocolBuffers {
/// <summary>
/// Implementation of the non-generic IMessage interface as far as possible.
/// </summary>
public abstract class AbstractMessage<TMessage, TBuilder> : IMessage<TMessage, TBuilder>
where TMessage : AbstractMessage<TMessage, TBuilder>
where TBuilder : AbstractBuilder<TMessage, TBuilder> {
// TODO(jonskeet): Cleaner to use a Nullable<int>?
/// <summary>
/// The serialized size if it's already been computed, or -1
/// if we haven't computed it yet.
/// </summary>
private int memoizedSize = -1;
#region Unimplemented members of IMessage
public abstract MessageDescriptor DescriptorForType { get; }
public abstract IDictionary<FieldDescriptor, object> AllFields { get; }
public abstract bool HasField(FieldDescriptor field);
public abstract object this[FieldDescriptor field] { get; }
public abstract int GetRepeatedFieldCount(FieldDescriptor field);
public abstract object this[FieldDescriptor field, int index] { get; }
public abstract UnknownFieldSet UnknownFields { get; }
public abstract TMessage DefaultInstanceForType { get; }
public abstract TBuilder CreateBuilderForType();
#endregion
public IBuilder WeakCreateBuilderForType() {
return CreateBuilderForType();
}
public IMessage WeakDefaultInstanceForType {
get { return DefaultInstanceForType; }
}
public virtual bool IsInitialized {
get {
// Check that all required fields are present.
foreach (FieldDescriptor field in DescriptorForType.Fields) {
if (field.IsRequired && !HasField(field)) {
return false;
}
}
// Check that embedded messages are initialized.
foreach (KeyValuePair<FieldDescriptor, object> entry in AllFields) {
FieldDescriptor field = entry.Key;
if (field.MappedType == MappedType.Message) {
if (field.IsRepeated) {
// We know it's an IList<T>, but not the exact type - so
// IEnumerable is the best we can do. (C# generics aren't covariant yet.)
foreach (IMessage element in (IEnumerable) entry.Value) {
if (!element.IsInitialized) {
return false;
}
}
} else {
if (!((IMessage)entry.Value).IsInitialized) {
return false;
}
}
}
}
return true;
}
}
public sealed override string ToString() {
return TextFormat.PrintToString(this);
}
public virtual void WriteTo(CodedOutputStream output) {
foreach (KeyValuePair<FieldDescriptor, object> entry in AllFields) {
FieldDescriptor field = entry.Key;
if (field.IsRepeated) {
// We know it's an IList<T>, but not the exact type - so
// IEnumerable is the best we can do. (C# generics aren't covariant yet.)
foreach (object element in (IEnumerable)entry.Value) {
output.WriteField(field.FieldType, field.FieldNumber, element);
}
} else {
output.WriteField(field.FieldType, field.FieldNumber, entry.Value);
}
}
UnknownFieldSet unknownFields = UnknownFields;
if (DescriptorForType.Options.MessageSetWireFormat) {
unknownFields.WriteAsMessageSetTo(output);
} else {
unknownFields.WriteTo(output);
}
}
public virtual int SerializedSize {
get {
int size = memoizedSize;
if (size != -1) {
return size;
}
size = 0;
foreach (KeyValuePair<FieldDescriptor, object> entry in AllFields) {
FieldDescriptor field = entry.Key;
if (field.IsRepeated) {
foreach (object element in (IEnumerable) entry.Value) {
size += CodedOutputStream.ComputeFieldSize(field.FieldType, field.FieldNumber, element);
}
} else {
size += CodedOutputStream.ComputeFieldSize(field.FieldType, field.FieldNumber, entry.Value);
}
}
UnknownFieldSet unknownFields = UnknownFields;
if (DescriptorForType.Options.MessageSetWireFormat) {
size += unknownFields.SerializedSizeAsMessageSet;
} else {
size += unknownFields.SerializedSize;
}
memoizedSize = size;
return size;
}
}
public ByteString ToByteString() {
ByteString.CodedBuilder output = new ByteString.CodedBuilder(SerializedSize);
WriteTo(output.CodedOutput);
return output.Build();
}
public byte[] ToByteArray() {
byte[] result = new byte[SerializedSize];
CodedOutputStream output = CodedOutputStream.CreateInstance(result);
WriteTo(output);
output.CheckNoSpaceLeft();
return result;
}
public void WriteTo(Stream output) {
CodedOutputStream codedOutput = CodedOutputStream.CreateInstance(output);
WriteTo(codedOutput);
codedOutput.Flush();
}
public override bool Equals(object other) {
if (other == this) {
return true;
}
IMessage otherMessage = other as IMessage;
if (otherMessage == null || otherMessage.DescriptorForType != DescriptorForType) {
return false;
}
return Dictionaries.Equals(AllFields, otherMessage.AllFields);
}
public override int GetHashCode() {
int hash = 41;
hash = (19 * hash) + DescriptorForType.GetHashCode();
hash = (53 * hash) + Dictionaries.GetHashCode(AllFields);
return hash;
}
}
}
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