diff options
Diffstat (limited to 'src/ProtocolBuffers/UnknownFieldSet.cs')
-rw-r--r-- | src/ProtocolBuffers/UnknownFieldSet.cs | 1536 |
1 files changed, 768 insertions, 768 deletions
diff --git a/src/ProtocolBuffers/UnknownFieldSet.cs b/src/ProtocolBuffers/UnknownFieldSet.cs index 594ae8bd..be773e41 100644 --- a/src/ProtocolBuffers/UnknownFieldSet.cs +++ b/src/ProtocolBuffers/UnknownFieldSet.cs @@ -1,768 +1,768 @@ -#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.Generic; -using System.IO; -using Google.ProtocolBuffers.Collections; -using Google.ProtocolBuffers.Descriptors; -using Google.ProtocolBuffers.DescriptorProtos; - -namespace Google.ProtocolBuffers { - /// <summary> - /// Used to keep track of fields which were seen when parsing a protocol message - /// but whose field numbers or types are unrecognized. This most frequently - /// occurs when new fields are added to a message type and then messages containing - /// those fields are read by old software that was built before the new types were - /// added. - /// - /// Every message contains an UnknownFieldSet. - /// - /// Most users will never need to use this class directly. - /// </summary> - public sealed class UnknownFieldSet : IMessageLite { - - private static readonly UnknownFieldSet defaultInstance = new UnknownFieldSet(new Dictionary<int, UnknownField>()); - - private readonly IDictionary<int, UnknownField> fields; - - private UnknownFieldSet(IDictionary<int, UnknownField> fields) { - this.fields = fields; - } - - /// <summary> - /// Creates a new unknown field set builder. - /// </summary> - public static Builder CreateBuilder() { - return new Builder(); - } - - /// <summary> - /// Creates a new unknown field set builder - /// and initialize it from <paramref name="original"/>. - /// </summary> - public static Builder CreateBuilder(UnknownFieldSet original) { - return new Builder().MergeFrom(original); - } - - public static UnknownFieldSet DefaultInstance { - get { return defaultInstance; } - } - - /// <summary> - /// Returns a read-only view of the mapping from field numbers to values. - /// </summary> - public IDictionary<int, UnknownField> FieldDictionary { - get { return Dictionaries.AsReadOnly(fields); } - } - - /// <summary> - /// Checks whether or not the given field number is present in the set. - /// </summary> - public bool HasField(int field) { - return fields.ContainsKey(field); - } - - /// <summary> - /// Fetches a field by number, returning an empty field if not present. - /// Never returns null. - /// </summary> - public UnknownField this[int number] { - get { - UnknownField ret; - if (!fields.TryGetValue(number, out ret)) { - ret = UnknownField.DefaultInstance; - } - return ret; - } - } - - /// <summary> - /// Serializes the set and writes it to <paramref name="output"/>. - /// </summary> - public void WriteTo(CodedOutputStream output) { - foreach (KeyValuePair<int, UnknownField> entry in fields) { - entry.Value.WriteTo(entry.Key, output); - } - } - - /// <summary> - /// Gets the number of bytes required to encode this set. - /// </summary> - public int SerializedSize { - get { - int result = 0; - foreach (KeyValuePair<int, UnknownField> entry in fields) { - result += entry.Value.GetSerializedSize(entry.Key); - } - return result; - } - } - - /// <summary> - /// Converts the set to a string in protocol buffer text format. This - /// is just a trivial wrapper around TextFormat.PrintToString. - /// </summary> - public override String ToString() { - return TextFormat.PrintToString(this); - } - - /// <summary> - /// Converts the set to a string in protocol buffer text format. This - /// is just a trivial wrapper around TextFormat.PrintToString. - /// </summary> - public void PrintTo(TextWriter writer) { - TextFormat.Print(this, writer); - } - - /// <summary> - /// Serializes the message to a ByteString and returns it. This is - /// just a trivial wrapper around WriteTo(CodedOutputStream). - /// </summary> - /// <returns></returns> - public ByteString ToByteString() { - ByteString.CodedBuilder codedBuilder = new ByteString.CodedBuilder(SerializedSize); - WriteTo(codedBuilder.CodedOutput); - return codedBuilder.Build(); - } - - /// <summary> - /// Serializes the message to a byte array and returns it. This is - /// just a trivial wrapper around WriteTo(CodedOutputStream). - /// </summary> - /// <returns></returns> - public byte[] ToByteArray() { - byte[] data = new byte[SerializedSize]; - CodedOutputStream output = CodedOutputStream.CreateInstance(data); - WriteTo(output); - output.CheckNoSpaceLeft(); - return data; - } - - /// <summary> - /// Serializes the message and writes it to <paramref name="output"/>. This is - /// just a trivial wrapper around WriteTo(CodedOutputStream). - /// </summary> - /// <param name="output"></param> - public void WriteTo(Stream output) { - CodedOutputStream codedOutput = CodedOutputStream.CreateInstance(output); - WriteTo(codedOutput); - codedOutput.Flush(); - } - - /// <summary> - /// Serializes the set and writes it to <paramref name="output"/> using - /// the MessageSet wire format. - /// </summary> - public void WriteAsMessageSetTo(CodedOutputStream output) { - foreach (KeyValuePair<int, UnknownField> entry in fields) { - entry.Value.WriteAsMessageSetExtensionTo(entry.Key, output); - } - } - - /// <summary> - /// Gets the number of bytes required to encode this set using the MessageSet - /// wire format. - /// </summary> - public int SerializedSizeAsMessageSet { - get { - int result = 0; - foreach (KeyValuePair<int, UnknownField> entry in fields) { - result += entry.Value.GetSerializedSizeAsMessageSetExtension(entry.Key); - } - return result; - } - } - - public override bool Equals(object other) { - if (ReferenceEquals(this, other)) { - return true; - } - UnknownFieldSet otherSet = other as UnknownFieldSet; - return otherSet != null && Dictionaries.Equals(fields, otherSet.fields); - } - - public override int GetHashCode() { - return Dictionaries.GetHashCode(fields); - } - - /// <summary> - /// Parses an UnknownFieldSet from the given input. - /// </summary> - public static UnknownFieldSet ParseFrom(CodedInputStream input) { - return CreateBuilder().MergeFrom(input).Build(); - } - - /// <summary> - /// Parses an UnknownFieldSet from the given data. - /// </summary> - public static UnknownFieldSet ParseFrom(ByteString data) { - return CreateBuilder().MergeFrom(data).Build(); - } - - /// <summary> - /// Parses an UnknownFieldSet from the given data. - /// </summary> - public static UnknownFieldSet ParseFrom(byte[] data) { - return CreateBuilder().MergeFrom(data).Build(); - } - - /// <summary> - /// Parses an UnknownFieldSet from the given input. - /// </summary> - public static UnknownFieldSet ParseFrom(Stream input) { - return CreateBuilder().MergeFrom(input).Build(); - } - - #region IMessageLite Members - - public bool IsInitialized { - get { return fields != null; } - } - - public void WriteDelimitedTo(Stream output) { - CodedOutputStream codedOutput = CodedOutputStream.CreateInstance(output); - codedOutput.WriteRawVarint32((uint) SerializedSize); - WriteTo(codedOutput); - codedOutput.Flush(); - } - - public IBuilderLite WeakCreateBuilderForType() { - return new Builder(); - } - - public IBuilderLite WeakToBuilder() { - return new Builder(fields); - } - - public IMessageLite WeakDefaultInstanceForType { - get { return defaultInstance; } - } - - #endregion - - /// <summary> - /// Builder for UnknownFieldSets. - /// </summary> - public sealed class Builder : IBuilderLite - { - /// <summary> - /// Mapping from number to field. Note that by using a SortedList we ensure - /// that the fields will be serialized in ascending order. - /// </summary> - private IDictionary<int, UnknownField> fields; - // Optimization: We keep around a builder for the last field that was - // modified so that we can efficiently add to it multiple times in a - // row (important when parsing an unknown repeated field). - private int lastFieldNumber; - private UnknownField.Builder lastField; - - internal Builder() { - fields = new SortedList<int, UnknownField>(); - } - - internal Builder(IDictionary<int, UnknownField> dictionary) { - fields = new SortedList<int, UnknownField>(dictionary); - } - - /// <summary> - /// Returns a field builder for the specified field number, including any values - /// which already exist. - /// </summary> - private UnknownField.Builder GetFieldBuilder(int number) { - if (lastField != null) { - if (number == lastFieldNumber) { - return lastField; - } - // Note: AddField() will reset lastField and lastFieldNumber. - AddField(lastFieldNumber, lastField.Build()); - } - if (number == 0) { - return null; - } - - lastField = UnknownField.CreateBuilder(); - UnknownField existing; - if (fields.TryGetValue(number, out existing)) { - lastField.MergeFrom(existing); - } - lastFieldNumber = number; - return lastField; - } - - /// <summary> - /// Build the UnknownFieldSet and return it. Once this method has been called, - /// this instance will no longer be usable. Calling any method after this - /// will throw a NullReferenceException. - /// </summary> - public UnknownFieldSet Build() { - GetFieldBuilder(0); // Force lastField to be built. - UnknownFieldSet result = fields.Count == 0 ? DefaultInstance : new UnknownFieldSet(fields); - fields = null; - return result; - } - - /// <summary> - /// Adds a field to the set. If a field with the same number already exists, it - /// is replaced. - /// </summary> - public Builder AddField(int number, UnknownField field) { - if (number == 0) { - throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number."); - } - if (lastField != null && lastFieldNumber == number) { - // Discard this. - lastField = null; - lastFieldNumber = 0; - } - fields[number] = field; - return this; - } - - /// <summary> - /// Resets the builder to an empty set. - /// </summary> - public Builder Clear() { - fields.Clear(); - lastFieldNumber = 0; - lastField = null; - return this; - } - - /// <summary> - /// Parse an entire message from <paramref name="input"/> and merge - /// its fields into this set. - /// </summary> - public Builder MergeFrom(CodedInputStream input) { - while (true) { - uint tag = input.ReadTag(); - if (tag == 0 || !MergeFieldFrom(tag, input)) { - break; - } - } - return this; - } - - /// <summary> - /// Parse a single field from <paramref name="input"/> and merge it - /// into this set. - /// </summary> - /// <param name="tag">The field's tag number, which was already parsed.</param> - /// <param name="input">The coded input stream containing the field</param> - /// <returns>false if the tag is an "end group" tag, true otherwise</returns> - [CLSCompliant(false)] - public bool MergeFieldFrom(uint tag, CodedInputStream input) { - int number = WireFormat.GetTagFieldNumber(tag); - switch (WireFormat.GetTagWireType(tag)) { - case WireFormat.WireType.Varint: - GetFieldBuilder(number).AddVarint(input.ReadUInt64()); - return true; - case WireFormat.WireType.Fixed64: - GetFieldBuilder(number).AddFixed64(input.ReadFixed64()); - return true; - case WireFormat.WireType.LengthDelimited: - GetFieldBuilder(number).AddLengthDelimited(input.ReadBytes()); - return true; - case WireFormat.WireType.StartGroup: { - Builder subBuilder = CreateBuilder(); -#pragma warning disable 0612 - input.ReadUnknownGroup(number, subBuilder); -#pragma warning restore 0612 - GetFieldBuilder(number).AddGroup(subBuilder.Build()); - return true; - } - case WireFormat.WireType.EndGroup: - return false; - case WireFormat.WireType.Fixed32: - GetFieldBuilder(number).AddFixed32(input.ReadFixed32()); - return true; - default: - throw InvalidProtocolBufferException.InvalidWireType(); - } - } - - /// <summary> - /// Parses <paramref name="input"/> as an UnknownFieldSet and merge it - /// with the set being built. This is just a small wrapper around - /// MergeFrom(CodedInputStream). - /// </summary> - public Builder MergeFrom(Stream input) { - CodedInputStream codedInput = CodedInputStream.CreateInstance(input); - MergeFrom(codedInput); - codedInput.CheckLastTagWas(0); - return this; - } - - /// <summary> - /// Parses <paramref name="data"/> as an UnknownFieldSet and merge it - /// with the set being built. This is just a small wrapper around - /// MergeFrom(CodedInputStream). - /// </summary> - public Builder MergeFrom(ByteString data) { - CodedInputStream input = data.CreateCodedInput(); - MergeFrom(input); - input.CheckLastTagWas(0); - return this; - } - - /// <summary> - /// Parses <paramref name="data"/> as an UnknownFieldSet and merge it - /// with the set being built. This is just a small wrapper around - /// MergeFrom(CodedInputStream). - /// </summary> - public Builder MergeFrom(byte[] data) { - CodedInputStream input = CodedInputStream.CreateInstance(data); - MergeFrom(input); - input.CheckLastTagWas(0); - return this; - } - - /// <summary> - /// Convenience method for merging a new field containing a single varint - /// value. This is used in particular when an unknown enum value is - /// encountered. - /// </summary> - [CLSCompliant(false)] - public Builder MergeVarintField(int number, ulong value) { - if (number == 0) { - throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number."); - } - GetFieldBuilder(number).AddVarint(value); - return this; - } - - /// <summary> - /// Merges the fields from <paramref name="other"/> into this set. - /// If a field number exists in both sets, the values in <paramref name="other"/> - /// will be appended to the values in this set. - /// </summary> - public Builder MergeFrom(UnknownFieldSet other) { - if (other != DefaultInstance) { - foreach(KeyValuePair<int, UnknownField> entry in other.fields) { - MergeField(entry.Key, entry.Value); - } - } - return this; - } - - /// <summary> - /// Checks if the given field number is present in the set. - /// </summary> - public bool HasField(int number) { - if (number == 0) { - throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number."); - } - return number == lastFieldNumber || fields.ContainsKey(number); - } - - /// <summary> - /// Adds a field to the unknown field set. If a field with the same - /// number already exists, the two are merged. - /// </summary> - public Builder MergeField(int number, UnknownField field) { - if (number == 0) { - throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number."); - } - if (HasField(number)) { - GetFieldBuilder(number).MergeFrom(field); - } else { - // Optimization: We could call getFieldBuilder(number).mergeFrom(field) - // in this case, but that would create a copy of the Field object. - // We'd rather reuse the one passed to us, so call AddField() instead. - AddField(number, field); - } - return this; - } - - internal void MergeFrom(CodedInputStream input, ExtensionRegistry extensionRegistry, IBuilder builder) { - while (true) { - uint tag = input.ReadTag(); - if (tag == 0) { - break; - } - - if (!MergeFieldFrom(input, extensionRegistry, builder, tag)) { - // end group tag - break; - } - } - } - - /// <summary> - /// Like <see cref="MergeFrom(CodedInputStream, ExtensionRegistry, IBuilder)" /> - /// but parses a single field. - /// </summary> - /// <param name="input">The input to read the field from</param> - /// <param name="extensionRegistry">Registry to use when an extension field is encountered</param> - /// <param name="builder">Builder to merge field into, if it's a known field</param> - /// <param name="tag">The tag, which should already have been read from the input</param> - /// <returns>true unless the tag is an end-group tag</returns> - internal bool MergeFieldFrom(CodedInputStream input, - ExtensionRegistry extensionRegistry, IBuilder builder, uint tag) { - - MessageDescriptor type = builder.DescriptorForType; - if (type.Options.MessageSetWireFormat && tag == WireFormat.MessageSetTag.ItemStart) { - MergeMessageSetExtensionFromCodedStream(input, extensionRegistry, builder); - return true; - } - - WireFormat.WireType wireType = WireFormat.GetTagWireType(tag); - int fieldNumber = WireFormat.GetTagFieldNumber(tag); - - FieldDescriptor field; - IMessageLite defaultFieldInstance = null; - - if (type.IsExtensionNumber(fieldNumber)) { - ExtensionInfo extension = extensionRegistry[type, fieldNumber]; - if (extension == null) { - field = null; - } else { - field = extension.Descriptor; - defaultFieldInstance = extension.DefaultInstance; - } - } else { - field = type.FindFieldByNumber(fieldNumber); - } - - // Unknown field or wrong wire type. Skip. - if (field == null || wireType != WireFormat.GetWireType(field)) { - return MergeFieldFrom(tag, input); - } - - if (field.IsPacked) { - int length = (int)input.ReadRawVarint32(); - int limit = input.PushLimit(length); - if (field.FieldType == FieldType.Enum) { - while (!input.ReachedLimit) { - int rawValue = input.ReadEnum(); - object value = field.EnumType.FindValueByNumber(rawValue); - if (value == null) { - // If the number isn't recognized as a valid value for this - // enum, drop it (don't even add it to unknownFields). - return true; - } - builder.WeakAddRepeatedField(field, value); - } - } else { - while (!input.ReachedLimit) { - Object value = input.ReadPrimitiveField(field.FieldType); - builder.WeakAddRepeatedField(field, value); - } - } - input.PopLimit(limit); - } else { - object value; - switch (field.FieldType) { - case FieldType.Group: - case FieldType.Message: { - IBuilderLite subBuilder; - if (defaultFieldInstance != null) { - subBuilder = defaultFieldInstance.WeakCreateBuilderForType(); - } else { - subBuilder = builder.CreateBuilderForField(field); - } - if (!field.IsRepeated) { - subBuilder.WeakMergeFrom((IMessageLite)builder[field]); - } - if (field.FieldType == FieldType.Group) { - input.ReadGroup(field.FieldNumber, subBuilder, extensionRegistry); - } else { - input.ReadMessage(subBuilder, extensionRegistry); - } - value = subBuilder.WeakBuild(); - break; - } - case FieldType.Enum: { - int rawValue = input.ReadEnum(); - value = field.EnumType.FindValueByNumber(rawValue); - // If the number isn't recognized as a valid value for this enum, - // drop it. - if (value == null) { - MergeVarintField(fieldNumber, (ulong)rawValue); - return true; - } - break; - } - default: - value = input.ReadPrimitiveField(field.FieldType); - break; - } - if (field.IsRepeated) { - builder.WeakAddRepeatedField(field, value); - } else { - builder[field] = value; - } - } - return true; - } - - /// <summary> - /// Called by MergeFieldFrom to parse a MessageSet extension. - /// </summary> - private void MergeMessageSetExtensionFromCodedStream(CodedInputStream input, - ExtensionRegistry extensionRegistry, IBuilder builder) { - MessageDescriptor type = builder.DescriptorForType; - - // The wire format for MessageSet is: - // message MessageSet { - // repeated group Item = 1 { - // required int32 typeId = 2; - // required bytes message = 3; - // } - // } - // "typeId" is the extension's field number. The extension can only be - // a message type, where "message" contains the encoded bytes of that - // message. - // - // In practice, we will probably never see a MessageSet item in which - // the message appears before the type ID, or where either field does not - // appear exactly once. However, in theory such cases are valid, so we - // should be prepared to accept them. - - int typeId = 0; - ByteString rawBytes = null; // If we encounter "message" before "typeId" - IBuilderLite subBuilder = null; - FieldDescriptor field = null; - - while (true) { - uint tag = input.ReadTag(); - if (tag == 0) { - break; - } - - if (tag == WireFormat.MessageSetTag.TypeID) { - typeId = input.ReadInt32(); - // Zero is not a valid type ID. - if (typeId != 0) { - ExtensionInfo extension = extensionRegistry[type, typeId]; - if (extension != null) { - field = extension.Descriptor; - subBuilder = extension.DefaultInstance.WeakCreateBuilderForType(); - IMessageLite originalMessage = (IMessageLite)builder[field]; - if (originalMessage != null) { - subBuilder.WeakMergeFrom(originalMessage); - } - if (rawBytes != null) { - // We already encountered the message. Parse it now. - // TODO(jonskeet): Check this is okay. It's subtly different from the Java, as it doesn't create an input stream from rawBytes. - // In fact, why don't we just call MergeFrom(rawBytes)? And what about the extension registry? - subBuilder.WeakMergeFrom(rawBytes.CreateCodedInput()); - rawBytes = null; - } - } else { - // Unknown extension number. If we already saw data, put it - // in rawBytes. - if (rawBytes != null) { - MergeField(typeId, UnknownField.CreateBuilder().AddLengthDelimited(rawBytes).Build()); - rawBytes = null; - } - } - } - } else if (tag == WireFormat.MessageSetTag.Message) { - if (typeId == 0) { - // We haven't seen a type ID yet, so we have to store the raw bytes for now. - rawBytes = input.ReadBytes(); - } else if (subBuilder == null) { - // We don't know how to parse this. Ignore it. - MergeField(typeId, UnknownField.CreateBuilder().AddLengthDelimited(input.ReadBytes()).Build()); - } else { - // We already know the type, so we can parse directly from the input - // with no copying. Hooray! - input.ReadMessage(subBuilder, extensionRegistry); - } - } else { - // Unknown tag. Skip it. - if (!input.SkipField(tag)) { - break; // end of group - } - } - } - - input.CheckLastTagWas(WireFormat.MessageSetTag.ItemEnd); - - if (subBuilder != null) { - builder[field] = subBuilder.WeakBuild(); - } - } - - #region IBuilderLite Members - - bool IBuilderLite.IsInitialized { - get { return fields != null; } - } - - IBuilderLite IBuilderLite.WeakClear() { - return Clear(); - } - - IBuilderLite IBuilderLite.WeakMergeFrom(IMessageLite message) { - return MergeFrom((UnknownFieldSet)message); - } - - IBuilderLite IBuilderLite.WeakMergeFrom(ByteString data) { - return MergeFrom(data); - } - - IBuilderLite IBuilderLite.WeakMergeFrom(ByteString data, ExtensionRegistry registry) { - return MergeFrom(data); - } - - IBuilderLite IBuilderLite.WeakMergeFrom(CodedInputStream input) { - return MergeFrom(input); - } - - IBuilderLite IBuilderLite.WeakMergeFrom(CodedInputStream input, ExtensionRegistry registry) { - return MergeFrom(input); - } - - IMessageLite IBuilderLite.WeakBuild() { - return Build(); - } - - IMessageLite IBuilderLite.WeakBuildPartial() { - return Build(); - } - - IBuilderLite IBuilderLite.WeakClone() { - return Build().WeakToBuilder(); - } - - IMessageLite IBuilderLite.WeakDefaultInstanceForType { - get { return DefaultInstance; } - } - - #endregion - } - } -} +#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.Generic;
+using System.IO;
+using Google.ProtocolBuffers.Collections;
+using Google.ProtocolBuffers.Descriptors;
+using Google.ProtocolBuffers.DescriptorProtos;
+
+namespace Google.ProtocolBuffers {
+ /// <summary>
+ /// Used to keep track of fields which were seen when parsing a protocol message
+ /// but whose field numbers or types are unrecognized. This most frequently
+ /// occurs when new fields are added to a message type and then messages containing
+ /// those fields are read by old software that was built before the new types were
+ /// added.
+ ///
+ /// Every message contains an UnknownFieldSet.
+ ///
+ /// Most users will never need to use this class directly.
+ /// </summary>
+ public sealed class UnknownFieldSet : IMessageLite {
+
+ private static readonly UnknownFieldSet defaultInstance = new UnknownFieldSet(new Dictionary<int, UnknownField>());
+
+ private readonly IDictionary<int, UnknownField> fields;
+
+ private UnknownFieldSet(IDictionary<int, UnknownField> fields) {
+ this.fields = fields;
+ }
+
+ /// <summary>
+ /// Creates a new unknown field set builder.
+ /// </summary>
+ public static Builder CreateBuilder() {
+ return new Builder();
+ }
+
+ /// <summary>
+ /// Creates a new unknown field set builder
+ /// and initialize it from <paramref name="original"/>.
+ /// </summary>
+ public static Builder CreateBuilder(UnknownFieldSet original) {
+ return new Builder().MergeFrom(original);
+ }
+
+ public static UnknownFieldSet DefaultInstance {
+ get { return defaultInstance; }
+ }
+
+ /// <summary>
+ /// Returns a read-only view of the mapping from field numbers to values.
+ /// </summary>
+ public IDictionary<int, UnknownField> FieldDictionary {
+ get { return Dictionaries.AsReadOnly(fields); }
+ }
+
+ /// <summary>
+ /// Checks whether or not the given field number is present in the set.
+ /// </summary>
+ public bool HasField(int field) {
+ return fields.ContainsKey(field);
+ }
+
+ /// <summary>
+ /// Fetches a field by number, returning an empty field if not present.
+ /// Never returns null.
+ /// </summary>
+ public UnknownField this[int number] {
+ get {
+ UnknownField ret;
+ if (!fields.TryGetValue(number, out ret)) {
+ ret = UnknownField.DefaultInstance;
+ }
+ return ret;
+ }
+ }
+
+ /// <summary>
+ /// Serializes the set and writes it to <paramref name="output"/>.
+ /// </summary>
+ public void WriteTo(CodedOutputStream output) {
+ foreach (KeyValuePair<int, UnknownField> entry in fields) {
+ entry.Value.WriteTo(entry.Key, output);
+ }
+ }
+
+ /// <summary>
+ /// Gets the number of bytes required to encode this set.
+ /// </summary>
+ public int SerializedSize {
+ get {
+ int result = 0;
+ foreach (KeyValuePair<int, UnknownField> entry in fields) {
+ result += entry.Value.GetSerializedSize(entry.Key);
+ }
+ return result;
+ }
+ }
+
+ /// <summary>
+ /// Converts the set to a string in protocol buffer text format. This
+ /// is just a trivial wrapper around TextFormat.PrintToString.
+ /// </summary>
+ public override String ToString() {
+ return TextFormat.PrintToString(this);
+ }
+
+ /// <summary>
+ /// Converts the set to a string in protocol buffer text format. This
+ /// is just a trivial wrapper around TextFormat.PrintToString.
+ /// </summary>
+ public void PrintTo(TextWriter writer) {
+ TextFormat.Print(this, writer);
+ }
+
+ /// <summary>
+ /// Serializes the message to a ByteString and returns it. This is
+ /// just a trivial wrapper around WriteTo(CodedOutputStream).
+ /// </summary>
+ /// <returns></returns>
+ public ByteString ToByteString() {
+ ByteString.CodedBuilder codedBuilder = new ByteString.CodedBuilder(SerializedSize);
+ WriteTo(codedBuilder.CodedOutput);
+ return codedBuilder.Build();
+ }
+
+ /// <summary>
+ /// Serializes the message to a byte array and returns it. This is
+ /// just a trivial wrapper around WriteTo(CodedOutputStream).
+ /// </summary>
+ /// <returns></returns>
+ public byte[] ToByteArray() {
+ byte[] data = new byte[SerializedSize];
+ CodedOutputStream output = CodedOutputStream.CreateInstance(data);
+ WriteTo(output);
+ output.CheckNoSpaceLeft();
+ return data;
+ }
+
+ /// <summary>
+ /// Serializes the message and writes it to <paramref name="output"/>. This is
+ /// just a trivial wrapper around WriteTo(CodedOutputStream).
+ /// </summary>
+ /// <param name="output"></param>
+ public void WriteTo(Stream output) {
+ CodedOutputStream codedOutput = CodedOutputStream.CreateInstance(output);
+ WriteTo(codedOutput);
+ codedOutput.Flush();
+ }
+
+ /// <summary>
+ /// Serializes the set and writes it to <paramref name="output"/> using
+ /// the MessageSet wire format.
+ /// </summary>
+ public void WriteAsMessageSetTo(CodedOutputStream output) {
+ foreach (KeyValuePair<int, UnknownField> entry in fields) {
+ entry.Value.WriteAsMessageSetExtensionTo(entry.Key, output);
+ }
+ }
+
+ /// <summary>
+ /// Gets the number of bytes required to encode this set using the MessageSet
+ /// wire format.
+ /// </summary>
+ public int SerializedSizeAsMessageSet {
+ get {
+ int result = 0;
+ foreach (KeyValuePair<int, UnknownField> entry in fields) {
+ result += entry.Value.GetSerializedSizeAsMessageSetExtension(entry.Key);
+ }
+ return result;
+ }
+ }
+
+ public override bool Equals(object other) {
+ if (ReferenceEquals(this, other)) {
+ return true;
+ }
+ UnknownFieldSet otherSet = other as UnknownFieldSet;
+ return otherSet != null && Dictionaries.Equals(fields, otherSet.fields);
+ }
+
+ public override int GetHashCode() {
+ return Dictionaries.GetHashCode(fields);
+ }
+
+ /// <summary>
+ /// Parses an UnknownFieldSet from the given input.
+ /// </summary>
+ public static UnknownFieldSet ParseFrom(CodedInputStream input) {
+ return CreateBuilder().MergeFrom(input).Build();
+ }
+
+ /// <summary>
+ /// Parses an UnknownFieldSet from the given data.
+ /// </summary>
+ public static UnknownFieldSet ParseFrom(ByteString data) {
+ return CreateBuilder().MergeFrom(data).Build();
+ }
+
+ /// <summary>
+ /// Parses an UnknownFieldSet from the given data.
+ /// </summary>
+ public static UnknownFieldSet ParseFrom(byte[] data) {
+ return CreateBuilder().MergeFrom(data).Build();
+ }
+
+ /// <summary>
+ /// Parses an UnknownFieldSet from the given input.
+ /// </summary>
+ public static UnknownFieldSet ParseFrom(Stream input) {
+ return CreateBuilder().MergeFrom(input).Build();
+ }
+
+ #region IMessageLite Members
+
+ public bool IsInitialized {
+ get { return fields != null; }
+ }
+
+ public void WriteDelimitedTo(Stream output) {
+ CodedOutputStream codedOutput = CodedOutputStream.CreateInstance(output);
+ codedOutput.WriteRawVarint32((uint) SerializedSize);
+ WriteTo(codedOutput);
+ codedOutput.Flush();
+ }
+
+ public IBuilderLite WeakCreateBuilderForType() {
+ return new Builder();
+ }
+
+ public IBuilderLite WeakToBuilder() {
+ return new Builder(fields);
+ }
+
+ public IMessageLite WeakDefaultInstanceForType {
+ get { return defaultInstance; }
+ }
+
+ #endregion
+
+ /// <summary>
+ /// Builder for UnknownFieldSets.
+ /// </summary>
+ public sealed class Builder : IBuilderLite
+ {
+ /// <summary>
+ /// Mapping from number to field. Note that by using a SortedList we ensure
+ /// that the fields will be serialized in ascending order.
+ /// </summary>
+ private IDictionary<int, UnknownField> fields;
+ // Optimization: We keep around a builder for the last field that was
+ // modified so that we can efficiently add to it multiple times in a
+ // row (important when parsing an unknown repeated field).
+ private int lastFieldNumber;
+ private UnknownField.Builder lastField;
+
+ internal Builder() {
+ fields = new SortedList<int, UnknownField>();
+ }
+
+ internal Builder(IDictionary<int, UnknownField> dictionary) {
+ fields = new SortedList<int, UnknownField>(dictionary);
+ }
+
+ /// <summary>
+ /// Returns a field builder for the specified field number, including any values
+ /// which already exist.
+ /// </summary>
+ private UnknownField.Builder GetFieldBuilder(int number) {
+ if (lastField != null) {
+ if (number == lastFieldNumber) {
+ return lastField;
+ }
+ // Note: AddField() will reset lastField and lastFieldNumber.
+ AddField(lastFieldNumber, lastField.Build());
+ }
+ if (number == 0) {
+ return null;
+ }
+
+ lastField = UnknownField.CreateBuilder();
+ UnknownField existing;
+ if (fields.TryGetValue(number, out existing)) {
+ lastField.MergeFrom(existing);
+ }
+ lastFieldNumber = number;
+ return lastField;
+ }
+
+ /// <summary>
+ /// Build the UnknownFieldSet and return it. Once this method has been called,
+ /// this instance will no longer be usable. Calling any method after this
+ /// will throw a NullReferenceException.
+ /// </summary>
+ public UnknownFieldSet Build() {
+ GetFieldBuilder(0); // Force lastField to be built.
+ UnknownFieldSet result = fields.Count == 0 ? DefaultInstance : new UnknownFieldSet(fields);
+ fields = null;
+ return result;
+ }
+
+ /// <summary>
+ /// Adds a field to the set. If a field with the same number already exists, it
+ /// is replaced.
+ /// </summary>
+ public Builder AddField(int number, UnknownField field) {
+ if (number == 0) {
+ throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number.");
+ }
+ if (lastField != null && lastFieldNumber == number) {
+ // Discard this.
+ lastField = null;
+ lastFieldNumber = 0;
+ }
+ fields[number] = field;
+ return this;
+ }
+
+ /// <summary>
+ /// Resets the builder to an empty set.
+ /// </summary>
+ public Builder Clear() {
+ fields.Clear();
+ lastFieldNumber = 0;
+ lastField = null;
+ return this;
+ }
+
+ /// <summary>
+ /// Parse an entire message from <paramref name="input"/> and merge
+ /// its fields into this set.
+ /// </summary>
+ public Builder MergeFrom(CodedInputStream input) {
+ while (true) {
+ uint tag = input.ReadTag();
+ if (tag == 0 || !MergeFieldFrom(tag, input)) {
+ break;
+ }
+ }
+ return this;
+ }
+
+ /// <summary>
+ /// Parse a single field from <paramref name="input"/> and merge it
+ /// into this set.
+ /// </summary>
+ /// <param name="tag">The field's tag number, which was already parsed.</param>
+ /// <param name="input">The coded input stream containing the field</param>
+ /// <returns>false if the tag is an "end group" tag, true otherwise</returns>
+ [CLSCompliant(false)]
+ public bool MergeFieldFrom(uint tag, CodedInputStream input) {
+ int number = WireFormat.GetTagFieldNumber(tag);
+ switch (WireFormat.GetTagWireType(tag)) {
+ case WireFormat.WireType.Varint:
+ GetFieldBuilder(number).AddVarint(input.ReadUInt64());
+ return true;
+ case WireFormat.WireType.Fixed64:
+ GetFieldBuilder(number).AddFixed64(input.ReadFixed64());
+ return true;
+ case WireFormat.WireType.LengthDelimited:
+ GetFieldBuilder(number).AddLengthDelimited(input.ReadBytes());
+ return true;
+ case WireFormat.WireType.StartGroup: {
+ Builder subBuilder = CreateBuilder();
+#pragma warning disable 0612
+ input.ReadUnknownGroup(number, subBuilder);
+#pragma warning restore 0612
+ GetFieldBuilder(number).AddGroup(subBuilder.Build());
+ return true;
+ }
+ case WireFormat.WireType.EndGroup:
+ return false;
+ case WireFormat.WireType.Fixed32:
+ GetFieldBuilder(number).AddFixed32(input.ReadFixed32());
+ return true;
+ default:
+ throw InvalidProtocolBufferException.InvalidWireType();
+ }
+ }
+
+ /// <summary>
+ /// Parses <paramref name="input"/> as an UnknownFieldSet and merge it
+ /// with the set being built. This is just a small wrapper around
+ /// MergeFrom(CodedInputStream).
+ /// </summary>
+ public Builder MergeFrom(Stream input) {
+ CodedInputStream codedInput = CodedInputStream.CreateInstance(input);
+ MergeFrom(codedInput);
+ codedInput.CheckLastTagWas(0);
+ return this;
+ }
+
+ /// <summary>
+ /// Parses <paramref name="data"/> as an UnknownFieldSet and merge it
+ /// with the set being built. This is just a small wrapper around
+ /// MergeFrom(CodedInputStream).
+ /// </summary>
+ public Builder MergeFrom(ByteString data) {
+ CodedInputStream input = data.CreateCodedInput();
+ MergeFrom(input);
+ input.CheckLastTagWas(0);
+ return this;
+ }
+
+ /// <summary>
+ /// Parses <paramref name="data"/> as an UnknownFieldSet and merge it
+ /// with the set being built. This is just a small wrapper around
+ /// MergeFrom(CodedInputStream).
+ /// </summary>
+ public Builder MergeFrom(byte[] data) {
+ CodedInputStream input = CodedInputStream.CreateInstance(data);
+ MergeFrom(input);
+ input.CheckLastTagWas(0);
+ return this;
+ }
+
+ /// <summary>
+ /// Convenience method for merging a new field containing a single varint
+ /// value. This is used in particular when an unknown enum value is
+ /// encountered.
+ /// </summary>
+ [CLSCompliant(false)]
+ public Builder MergeVarintField(int number, ulong value) {
+ if (number == 0) {
+ throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number.");
+ }
+ GetFieldBuilder(number).AddVarint(value);
+ return this;
+ }
+
+ /// <summary>
+ /// Merges the fields from <paramref name="other"/> into this set.
+ /// If a field number exists in both sets, the values in <paramref name="other"/>
+ /// will be appended to the values in this set.
+ /// </summary>
+ public Builder MergeFrom(UnknownFieldSet other) {
+ if (other != DefaultInstance) {
+ foreach(KeyValuePair<int, UnknownField> entry in other.fields) {
+ MergeField(entry.Key, entry.Value);
+ }
+ }
+ return this;
+ }
+
+ /// <summary>
+ /// Checks if the given field number is present in the set.
+ /// </summary>
+ public bool HasField(int number) {
+ if (number == 0) {
+ throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number.");
+ }
+ return number == lastFieldNumber || fields.ContainsKey(number);
+ }
+
+ /// <summary>
+ /// Adds a field to the unknown field set. If a field with the same
+ /// number already exists, the two are merged.
+ /// </summary>
+ public Builder MergeField(int number, UnknownField field) {
+ if (number == 0) {
+ throw new ArgumentOutOfRangeException("number", "Zero is not a valid field number.");
+ }
+ if (HasField(number)) {
+ GetFieldBuilder(number).MergeFrom(field);
+ } else {
+ // Optimization: We could call getFieldBuilder(number).mergeFrom(field)
+ // in this case, but that would create a copy of the Field object.
+ // We'd rather reuse the one passed to us, so call AddField() instead.
+ AddField(number, field);
+ }
+ return this;
+ }
+
+ internal void MergeFrom(CodedInputStream input, ExtensionRegistry extensionRegistry, IBuilder builder) {
+ while (true) {
+ uint tag = input.ReadTag();
+ if (tag == 0) {
+ break;
+ }
+
+ if (!MergeFieldFrom(input, extensionRegistry, builder, tag)) {
+ // end group tag
+ break;
+ }
+ }
+ }
+
+ /// <summary>
+ /// Like <see cref="MergeFrom(CodedInputStream, ExtensionRegistry, IBuilder)" />
+ /// but parses a single field.
+ /// </summary>
+ /// <param name="input">The input to read the field from</param>
+ /// <param name="extensionRegistry">Registry to use when an extension field is encountered</param>
+ /// <param name="builder">Builder to merge field into, if it's a known field</param>
+ /// <param name="tag">The tag, which should already have been read from the input</param>
+ /// <returns>true unless the tag is an end-group tag</returns>
+ internal bool MergeFieldFrom(CodedInputStream input,
+ ExtensionRegistry extensionRegistry, IBuilder builder, uint tag) {
+
+ MessageDescriptor type = builder.DescriptorForType;
+ if (type.Options.MessageSetWireFormat && tag == WireFormat.MessageSetTag.ItemStart) {
+ MergeMessageSetExtensionFromCodedStream(input, extensionRegistry, builder);
+ return true;
+ }
+
+ WireFormat.WireType wireType = WireFormat.GetTagWireType(tag);
+ int fieldNumber = WireFormat.GetTagFieldNumber(tag);
+
+ FieldDescriptor field;
+ IMessageLite defaultFieldInstance = null;
+
+ if (type.IsExtensionNumber(fieldNumber)) {
+ ExtensionInfo extension = extensionRegistry[type, fieldNumber];
+ if (extension == null) {
+ field = null;
+ } else {
+ field = extension.Descriptor;
+ defaultFieldInstance = extension.DefaultInstance;
+ }
+ } else {
+ field = type.FindFieldByNumber(fieldNumber);
+ }
+
+ // Unknown field or wrong wire type. Skip.
+ if (field == null || wireType != WireFormat.GetWireType(field)) {
+ return MergeFieldFrom(tag, input);
+ }
+
+ if (field.IsPacked) {
+ int length = (int)input.ReadRawVarint32();
+ int limit = input.PushLimit(length);
+ if (field.FieldType == FieldType.Enum) {
+ while (!input.ReachedLimit) {
+ int rawValue = input.ReadEnum();
+ object value = field.EnumType.FindValueByNumber(rawValue);
+ if (value == null) {
+ // If the number isn't recognized as a valid value for this
+ // enum, drop it (don't even add it to unknownFields).
+ return true;
+ }
+ builder.WeakAddRepeatedField(field, value);
+ }
+ } else {
+ while (!input.ReachedLimit) {
+ Object value = input.ReadPrimitiveField(field.FieldType);
+ builder.WeakAddRepeatedField(field, value);
+ }
+ }
+ input.PopLimit(limit);
+ } else {
+ object value;
+ switch (field.FieldType) {
+ case FieldType.Group:
+ case FieldType.Message: {
+ IBuilderLite subBuilder;
+ if (defaultFieldInstance != null) {
+ subBuilder = defaultFieldInstance.WeakCreateBuilderForType();
+ } else {
+ subBuilder = builder.CreateBuilderForField(field);
+ }
+ if (!field.IsRepeated) {
+ subBuilder.WeakMergeFrom((IMessageLite)builder[field]);
+ }
+ if (field.FieldType == FieldType.Group) {
+ input.ReadGroup(field.FieldNumber, subBuilder, extensionRegistry);
+ } else {
+ input.ReadMessage(subBuilder, extensionRegistry);
+ }
+ value = subBuilder.WeakBuild();
+ break;
+ }
+ case FieldType.Enum: {
+ int rawValue = input.ReadEnum();
+ value = field.EnumType.FindValueByNumber(rawValue);
+ // If the number isn't recognized as a valid value for this enum,
+ // drop it.
+ if (value == null) {
+ MergeVarintField(fieldNumber, (ulong)rawValue);
+ return true;
+ }
+ break;
+ }
+ default:
+ value = input.ReadPrimitiveField(field.FieldType);
+ break;
+ }
+ if (field.IsRepeated) {
+ builder.WeakAddRepeatedField(field, value);
+ } else {
+ builder[field] = value;
+ }
+ }
+ return true;
+ }
+
+ /// <summary>
+ /// Called by MergeFieldFrom to parse a MessageSet extension.
+ /// </summary>
+ private void MergeMessageSetExtensionFromCodedStream(CodedInputStream input,
+ ExtensionRegistry extensionRegistry, IBuilder builder) {
+ MessageDescriptor type = builder.DescriptorForType;
+
+ // The wire format for MessageSet is:
+ // message MessageSet {
+ // repeated group Item = 1 {
+ // required int32 typeId = 2;
+ // required bytes message = 3;
+ // }
+ // }
+ // "typeId" is the extension's field number. The extension can only be
+ // a message type, where "message" contains the encoded bytes of that
+ // message.
+ //
+ // In practice, we will probably never see a MessageSet item in which
+ // the message appears before the type ID, or where either field does not
+ // appear exactly once. However, in theory such cases are valid, so we
+ // should be prepared to accept them.
+
+ int typeId = 0;
+ ByteString rawBytes = null; // If we encounter "message" before "typeId"
+ IBuilderLite subBuilder = null;
+ FieldDescriptor field = null;
+
+ while (true) {
+ uint tag = input.ReadTag();
+ if (tag == 0) {
+ break;
+ }
+
+ if (tag == WireFormat.MessageSetTag.TypeID) {
+ typeId = input.ReadInt32();
+ // Zero is not a valid type ID.
+ if (typeId != 0) {
+ ExtensionInfo extension = extensionRegistry[type, typeId];
+ if (extension != null) {
+ field = extension.Descriptor;
+ subBuilder = extension.DefaultInstance.WeakCreateBuilderForType();
+ IMessageLite originalMessage = (IMessageLite)builder[field];
+ if (originalMessage != null) {
+ subBuilder.WeakMergeFrom(originalMessage);
+ }
+ if (rawBytes != null) {
+ // We already encountered the message. Parse it now.
+ // TODO(jonskeet): Check this is okay. It's subtly different from the Java, as it doesn't create an input stream from rawBytes.
+ // In fact, why don't we just call MergeFrom(rawBytes)? And what about the extension registry?
+ subBuilder.WeakMergeFrom(rawBytes.CreateCodedInput());
+ rawBytes = null;
+ }
+ } else {
+ // Unknown extension number. If we already saw data, put it
+ // in rawBytes.
+ if (rawBytes != null) {
+ MergeField(typeId, UnknownField.CreateBuilder().AddLengthDelimited(rawBytes).Build());
+ rawBytes = null;
+ }
+ }
+ }
+ } else if (tag == WireFormat.MessageSetTag.Message) {
+ if (typeId == 0) {
+ // We haven't seen a type ID yet, so we have to store the raw bytes for now.
+ rawBytes = input.ReadBytes();
+ } else if (subBuilder == null) {
+ // We don't know how to parse this. Ignore it.
+ MergeField(typeId, UnknownField.CreateBuilder().AddLengthDelimited(input.ReadBytes()).Build());
+ } else {
+ // We already know the type, so we can parse directly from the input
+ // with no copying. Hooray!
+ input.ReadMessage(subBuilder, extensionRegistry);
+ }
+ } else {
+ // Unknown tag. Skip it.
+ if (!input.SkipField(tag)) {
+ break; // end of group
+ }
+ }
+ }
+
+ input.CheckLastTagWas(WireFormat.MessageSetTag.ItemEnd);
+
+ if (subBuilder != null) {
+ builder[field] = subBuilder.WeakBuild();
+ }
+ }
+
+ #region IBuilderLite Members
+
+ bool IBuilderLite.IsInitialized {
+ get { return fields != null; }
+ }
+
+ IBuilderLite IBuilderLite.WeakClear() {
+ return Clear();
+ }
+
+ IBuilderLite IBuilderLite.WeakMergeFrom(IMessageLite message) {
+ return MergeFrom((UnknownFieldSet)message);
+ }
+
+ IBuilderLite IBuilderLite.WeakMergeFrom(ByteString data) {
+ return MergeFrom(data);
+ }
+
+ IBuilderLite IBuilderLite.WeakMergeFrom(ByteString data, ExtensionRegistry registry) {
+ return MergeFrom(data);
+ }
+
+ IBuilderLite IBuilderLite.WeakMergeFrom(CodedInputStream input) {
+ return MergeFrom(input);
+ }
+
+ IBuilderLite IBuilderLite.WeakMergeFrom(CodedInputStream input, ExtensionRegistry registry) {
+ return MergeFrom(input);
+ }
+
+ IMessageLite IBuilderLite.WeakBuild() {
+ return Build();
+ }
+
+ IMessageLite IBuilderLite.WeakBuildPartial() {
+ return Build();
+ }
+
+ IBuilderLite IBuilderLite.WeakClone() {
+ return Build().WeakToBuilder();
+ }
+
+ IMessageLite IBuilderLite.WeakDefaultInstanceForType {
+ get { return DefaultInstance; }
+ }
+
+ #endregion
+ }
+ }
+}
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