internal void MergeFrom(ICodedInputStream input, ExtensionRegistry extensionRegistry, IBuilder builder)
{
uint tag;
string name;
while (input.ReadTag(out tag, out name))
{
if (tag == 0 && name != null)
{
FieldDescriptor fieldByName = builder.DescriptorForType.FindFieldByName(name);
if (fieldByName != null)
{
tag = WireFormat.MakeTag(fieldByName);
}
else
{
ExtensionInfo extension = extensionRegistry.FindByName(builder.DescriptorForType, name);
if (extension != null)
{
tag = WireFormat.MakeTag(extension.Descriptor);
}
}
}
if (tag == 0)
{
if (input.SkipField())
{
continue; //can't merge unknown without field tag
}
break;
}
if (!MergeFieldFrom(input, extensionRegistry, builder, tag, name))
{
// end group tag
break;
}
}
}
/// <summary>
/// Like <see cref="MergeFrom(ICodedInputStream, 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(ICodedInputStream input,
ExtensionRegistry extensionRegistry, IBuilder builder, uint tag,
string fieldName)
{
if (tag == 0 && fieldName != null)
{
FieldDescriptor fieldByName = builder.DescriptorForType.FindFieldByName(fieldName);
if (fieldByName != null)
{
tag = WireFormat.MakeTag(fieldByName);
}
else
{
ExtensionInfo extension = extensionRegistry.FindByName(builder.DescriptorForType, fieldName);
if (extension != null)
{
tag = WireFormat.MakeTag(extension.Descriptor);
}
}
}
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)
{
return(MergeFieldFrom(tag, input));
}
if (wireType != WireFormat.GetWireType(field))
{
WireFormat.WireType expectedType = WireFormat.GetWireType(field.FieldType);
if (wireType == expectedType)
{
//Allowed as of 2.3, this is unpacked data for a packed array
}
else if (field.IsRepeated && wireType == WireFormat.WireType.LengthDelimited &&
(expectedType == WireFormat.WireType.Varint || expectedType == WireFormat.WireType.Fixed32 ||
expectedType == WireFormat.WireType.Fixed64))
{
//Allowed as of 2.3, this is packed data for an unpacked array
}
else
{
return(MergeFieldFrom(tag, input));
}
}
switch (field.FieldType)
{
case FieldType.Group:
case FieldType.Message:
{
IBuilderLite subBuilder = (defaultFieldInstance != null)
? defaultFieldInstance.WeakCreateBuilderForType()
: 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);
}
builder[field] = subBuilder.WeakBuild();
}
else
{
List <IMessageLite> list = new List <IMessageLite>();
if (field.FieldType == FieldType.Group)
{
input.ReadGroupArray(tag, fieldName, list, subBuilder.WeakDefaultInstanceForType,
extensionRegistry);
}
else
{
input.ReadMessageArray(tag, fieldName, list, subBuilder.WeakDefaultInstanceForType,
extensionRegistry);
}
foreach (IMessageLite m in list)
{
builder.WeakAddRepeatedField(field, m);
}
return(true);
}
break;
}
case FieldType.Enum:
{
if (!field.IsRepeated)
{
object unknown;
IEnumLite value = null;
if (input.ReadEnum(ref value, out unknown, field.EnumType))
{
builder[field] = value;
}
else if (unknown is int)
{
MergeVarintField(fieldNumber, (ulong)(int)unknown);
}
}
else
{
ICollection <object> unknown;
List <IEnumLite> list = new List <IEnumLite>();
input.ReadEnumArray(tag, fieldName, list, out unknown, field.EnumType);
foreach (IEnumLite en in list)
{
builder.WeakAddRepeatedField(field, en);
}
if (unknown != null)
{
foreach (object oval in unknown)
{
if (oval is int)
{
MergeVarintField(fieldNumber, (ulong)(int)oval);
}
}
}
}
break;
}
default:
{
if (!field.IsRepeated)
{
object value = null;
if (input.ReadPrimitiveField(field.FieldType, ref value))
{
builder[field] = value;
}
}
else
{
List <object> list = new List <object>();
input.ReadPrimitiveArray(field.FieldType, tag, fieldName, list);
foreach (object oval in list)
{
builder.WeakAddRepeatedField(field, oval);
}
}
break;
}
}
return(true);
}
/// <summary>
/// Parses a single field from the specified tokenizer and merges it into
/// the builder.
/// </summary>
private static void MergeField(TextTokenizer tokenizer, ExtensionRegistry extensionRegistry,
IBuilder builder)
{
FieldDescriptor field;
MessageDescriptor type = builder.DescriptorForType;
ExtensionInfo extension = null;
if (tokenizer.TryConsume("["))
{
// An extension.
StringBuilder name = new StringBuilder(tokenizer.ConsumeIdentifier());
while (tokenizer.TryConsume("."))
{
name.Append(".");
name.Append(tokenizer.ConsumeIdentifier());
}
extension = extensionRegistry.FindByName(type, name.ToString());
if (extension == null)
{
throw tokenizer.CreateFormatExceptionPreviousToken("Extension \"" + name +
"\" not found in the ExtensionRegistry.");
}
else if (extension.Descriptor.ContainingType != type)
{
throw tokenizer.CreateFormatExceptionPreviousToken("Extension \"" + name +
"\" does not extend message type \"" +
type.FullName + "\".");
}
tokenizer.Consume("]");
field = extension.Descriptor;
}
else
{
String name = tokenizer.ConsumeIdentifier();
field = type.FindDescriptor <FieldDescriptor>(name);
// Group names are expected to be capitalized as they appear in the
// .proto file, which actually matches their type names, not their field
// names.
if (field == null)
{
// Explicitly specify the invariant culture so that this code does not break when
// executing in Turkey.
#if PORTABLE_LIBRARY
String lowerName = name.ToLowerInvariant();
#else
String lowerName = name.ToLower(FrameworkPortability.InvariantCulture);
#endif
field = type.FindDescriptor <FieldDescriptor>(lowerName);
// If the case-insensitive match worked but the field is NOT a group,
// TODO(jonskeet): What? Java comment ends here!
if (field != null && field.FieldType != FieldType.Group)
{
field = null;
}
}
// Again, special-case group names as described above.
if (field != null && field.FieldType == FieldType.Group && field.MessageType.Name != name)
{
field = null;
}
if (field == null)
{
throw tokenizer.CreateFormatExceptionPreviousToken(
"Message type \"" + type.FullName + "\" has no field named \"" + name + "\".");
}
}
object value = null;
if (field.MappedType == MappedType.Message)
{
tokenizer.TryConsume(":"); // optional
String endToken;
if (tokenizer.TryConsume("<"))
{
endToken = ">";
}
else
{
tokenizer.Consume("{");
endToken = "}";
}
IBuilder subBuilder;
if (extension == null)
{
subBuilder = builder.CreateBuilderForField(field);
}
else
{
subBuilder = extension.DefaultInstance.WeakCreateBuilderForType() as IBuilder;
if (subBuilder == null)
{
throw new NotSupportedException("Lite messages are not supported.");
}
}
while (!tokenizer.TryConsume(endToken))
{
if (tokenizer.AtEnd)
{
throw tokenizer.CreateFormatException("Expected \"" + endToken + "\".");
}
MergeField(tokenizer, extensionRegistry, subBuilder);
}
value = subBuilder.WeakBuild();
}
else
{
tokenizer.Consume(":");
switch (field.FieldType)
{
case FieldType.Int32:
case FieldType.SInt32:
case FieldType.SFixed32:
value = tokenizer.ConsumeInt32();
break;
case FieldType.Int64:
case FieldType.SInt64:
case FieldType.SFixed64:
value = tokenizer.ConsumeInt64();
break;
case FieldType.UInt32:
case FieldType.Fixed32:
value = tokenizer.ConsumeUInt32();
break;
case FieldType.UInt64:
case FieldType.Fixed64:
value = tokenizer.ConsumeUInt64();
break;
case FieldType.Float:
value = tokenizer.ConsumeFloat();
break;
case FieldType.Double:
value = tokenizer.ConsumeDouble();
break;
case FieldType.Bool:
value = tokenizer.ConsumeBoolean();
break;
case FieldType.String:
value = tokenizer.ConsumeString();
break;
case FieldType.Bytes:
value = tokenizer.ConsumeByteString();
break;
case FieldType.Enum:
{
EnumDescriptor enumType = field.EnumType;
if (tokenizer.LookingAtInteger())
{
int number = tokenizer.ConsumeInt32();
value = enumType.FindValueByNumber(number);
if (value == null)
{
throw tokenizer.CreateFormatExceptionPreviousToken(
"Enum type \"" + enumType.FullName +
"\" has no value with number " + number + ".");
}
}
else
{
String id = tokenizer.ConsumeIdentifier();
value = enumType.FindValueByName(id);
if (value == null)
{
throw tokenizer.CreateFormatExceptionPreviousToken(
"Enum type \"" + enumType.FullName +
"\" has no value named \"" + id + "\".");
}
}
break;
}
case FieldType.Message:
case FieldType.Group:
throw new InvalidOperationException("Can't get here.");
}
}
if (field.IsRepeated)
{
builder.WeakAddRepeatedField(field, value);
}
else
{
builder.SetField(field, value);
}
}