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using Google.ProtocolBuffers.Descriptors;
namespace Google.ProtocolBuffers.ProtoGen {
internal class ExtensionGenerator : SourceGeneratorBase<FieldDescriptor>, ISourceGenerator {
private readonly string scope;
private readonly string type;
private readonly string name;
internal ExtensionGenerator(FieldDescriptor descriptor) : base(descriptor) {
if (Descriptor.ExtensionScope != null) {
scope = GetClassName(Descriptor.ExtensionScope);
} else {
scope = DescriptorUtil.GetFullUmbrellaClassName(Descriptor.File);
}
switch (Descriptor.MappedType) {
case MappedType.Message:
type = GetClassName(Descriptor.MessageType);
break;
case MappedType.Enum:
type = GetClassName(Descriptor.EnumType);
break;
default:
type = DescriptorUtil.GetMappedTypeName(Descriptor.MappedType);
break;
}
name = Descriptor.CSharpOptions.PropertyName;
}
public void Generate(TextGenerator writer) {
writer.WriteLine ("public const int {0} = {1};", GetFieldConstantName(Descriptor), Descriptor.FieldNumber);
if (Descriptor.IsRepeated) {
if (!Descriptor.IsCLSCompliant) {
writer.WriteLine("[global::System.CLSCompliant(false)]");
}
writer.WriteLine("{0} static pb::GeneratedExtensionBase<scg::IList<{1}>> {2};", ClassAccessLevel, type, name);
} else {
if (!Descriptor.IsCLSCompliant) {
writer.WriteLine("[global::System.CLSCompliant(false)]");
}
writer.WriteLine("{0} static pb::GeneratedExtensionBase<{1}> {2};", ClassAccessLevel, type, name);
}
}
internal void GenerateStaticVariableInitializers(TextGenerator writer) {
if (Descriptor.IsRepeated) {
writer.WriteLine("{0}.{1} = pb::GeneratedRepeatExtension<{2}>.CreateInstance({0}.Descriptor.Extensions[{3}]);", scope, name, type, Descriptor.Index);
} else {
writer.WriteLine("{0}.{1} = pb::GeneratedSingleExtension<{2}>.CreateInstance({0}.Descriptor.Extensions[{3}]);", scope, name, type, Descriptor.Index);
}
}
internal void GenerateExtensionRegistrationCode(TextGenerator writer) {
writer.WriteLine("registry.Add({0}.{1});", scope, name);
}
}
}
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