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