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using System;
using System.Collections.Generic;
using Google.ProtocolBuffers.Descriptors;
using System.Collections;
namespace Google.ProtocolBuffers {
/// <summary>
/// Class used to represent repeat extensions in generated classes.
/// </summary>
public class GeneratedRepeatExtension<TExtensionElement> : GeneratedExtensionBase<IList<TExtensionElement>> {
private GeneratedRepeatExtension(FieldDescriptor field) : base(field, typeof(TExtensionElement)) {
}
public static GeneratedExtensionBase<IList<TExtensionElement>> CreateInstance(FieldDescriptor descriptor) {
if (!descriptor.IsRepeated) {
throw new ArgumentException("Must call GeneratedRepeatExtension.CreateInstance() for repeated types.");
}
return new GeneratedRepeatExtension<TExtensionElement>(descriptor);
}
/// <summary>
/// Converts the list to the right type.
/// TODO(jonskeet): Check where this is used, and whether we need to convert
/// for primitive types.
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public override object FromReflectionType(object value) {
if (Descriptor.MappedType == MappedType.Message ||
Descriptor.MappedType == MappedType.Enum) {
// Must convert the whole list.
List<TExtensionElement> result = new List<TExtensionElement>();
foreach (object element in (IEnumerable) value) {
((IList) result).Add(SingularFromReflectionType(element));
}
return result;
} else {
return value;
}
}
}
}
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