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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.Generic;
using Google.ProtocolBuffers.DescriptorProtos;
namespace Google.ProtocolBuffers.Descriptors {
/// <summary>
/// Descriptor for an enum type in a .proto file.
/// </summary>
public sealed class EnumDescriptor : IndexedDescriptorBase<EnumDescriptorProto, EnumOptions> {
private readonly MessageDescriptor containingType;
private readonly IList<EnumValueDescriptor> values;
internal EnumDescriptor(EnumDescriptorProto proto, FileDescriptor file, MessageDescriptor parent, int index)
: base(proto, file, ComputeFullName(file, parent, proto.Name), index) {
containingType = parent;
if (proto.ValueCount == 0) {
// We cannot allow enums with no values because this would mean there
// would be no valid default value for fields of this type.
throw new DescriptorValidationException(this, "Enums must contain at least one value.");
}
values = DescriptorUtil.ConvertAndMakeReadOnly(proto.ValueList,
(value, i) => new EnumValueDescriptor(value, file, this, i));
File.DescriptorPool.AddSymbol(this);
}
/// <value>
/// If this is a nested type, get the outer descriptor, otherwise null.
/// </value>
public MessageDescriptor ContainingType {
get { return containingType; }
}
/// <value>
/// An unmodifiable list of defined value descriptors for this enum.
/// </value>
public IList<EnumValueDescriptor> Values {
get { return values; }
}
/// <summary>
/// Finds an enum value by number. If multiple enum values have the
/// same number, this returns the first defined value with that number.
/// </summary>
// TODO(jonskeet): Make internal and use InternalsVisibleTo?
public EnumValueDescriptor FindValueByNumber(int number) {
return File.DescriptorPool.FindEnumValueByNumber(this, number);
}
/// <summary>
/// Finds an enum value by name.
/// </summary>
/// <param name="name">The unqualified name of the value (e.g. "FOO").</param>
/// <returns>The value's descriptor, or null if not found.</returns>
// TODO(jonskeet): Make internal and use InternalsVisibleTo?
public EnumValueDescriptor FindValueByName(string name) {
return File.DescriptorPool.FindSymbol<EnumValueDescriptor>(FullName + "." + name);
}
}
}
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