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#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// http://github.com/jskeet/dotnet-protobufs/
// Original C++/Java/Python code:
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion
using Google.ProtocolBuffers.Descriptors;
namespace Google.ProtocolBuffers.ProtoGen
{
internal class GenericServiceGenerator : SourceGeneratorBase<ServiceDescriptor>, ISourceGenerator
{
private enum RequestOrResponse
{
Request,
Response
}
internal GenericServiceGenerator(ServiceDescriptor descriptor)
: base(descriptor)
{
}
public void Generate(TextGenerator writer)
{
writer.WriteLine("[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]");
WriteGeneratedCodeAttributes(writer);
writer.WriteLine("{0} abstract class {1} : pb::IService {{", ClassAccessLevel, Descriptor.Name);
writer.Indent();
foreach (MethodDescriptor method in Descriptor.Methods)
{
writer.WriteLine("{0} abstract void {1}(", ClassAccessLevel,
NameHelpers.UnderscoresToPascalCase(method.Name));
writer.WriteLine(" pb::IRpcController controller,");
writer.WriteLine(" {0} request,", GetClassName(method.InputType));
writer.WriteLine(" global::System.Action<{0}> done);", GetClassName(method.OutputType));
}
// Generate Descriptor and DescriptorForType.
writer.WriteLine();
writer.WriteLine("{0} static pbd::ServiceDescriptor Descriptor {{", ClassAccessLevel);
writer.WriteLine(" get {{ return {0}.Descriptor.Services[{1}]; }}",
DescriptorUtil.GetQualifiedUmbrellaClassName(Descriptor.File.CSharpOptions),
Descriptor.Index);
writer.WriteLine("}");
writer.WriteLine("public pbd::ServiceDescriptor DescriptorForType {");
writer.WriteLine(" get { return Descriptor; }");
writer.WriteLine("}");
GenerateCallMethod(writer);
GenerateGetPrototype(RequestOrResponse.Request, writer);
GenerateGetPrototype(RequestOrResponse.Response, writer);
GenerateStub(writer);
writer.Outdent();
writer.WriteLine("}");
}
private void GenerateCallMethod(TextGenerator writer)
{
writer.WriteLine();
writer.WriteLine("public void CallMethod(");
writer.WriteLine(" pbd::MethodDescriptor method,");
writer.WriteLine(" pb::IRpcController controller,");
writer.WriteLine(" pb::IMessage request,");
writer.WriteLine(" global::System.Action<pb::IMessage> done) {");
writer.Indent();
writer.WriteLine("if (method.Service != Descriptor) {");
writer.WriteLine(" throw new global::System.ArgumentException(");
writer.WriteLine(" \"Service.CallMethod() given method descriptor for wrong service type.\");");
writer.WriteLine("}");
writer.WriteLine("switch(method.Index) {");
writer.Indent();
foreach (MethodDescriptor method in Descriptor.Methods)
{
writer.WriteLine("case {0}:", method.Index);
writer.WriteLine(" this.{0}(controller, ({1}) request,",
NameHelpers.UnderscoresToPascalCase(method.Name), GetClassName(method.InputType));
writer.WriteLine(" pb::RpcUtil.SpecializeCallback<{0}>(", GetClassName(method.OutputType));
writer.WriteLine(" done));");
writer.WriteLine(" return;");
}
writer.WriteLine("default:");
writer.WriteLine(" throw new global::System.InvalidOperationException(\"Can't get here.\");");
writer.Outdent();
writer.WriteLine("}");
writer.Outdent();
writer.WriteLine("}");
writer.WriteLine();
}
private void GenerateGetPrototype(RequestOrResponse which, TextGenerator writer)
{
writer.WriteLine("public pb::IMessage Get{0}Prototype(pbd::MethodDescriptor method) {{", which);
writer.Indent();
writer.WriteLine("if (method.Service != Descriptor) {");
writer.WriteLine(" throw new global::System.ArgumentException(");
writer.WriteLine(" \"Service.Get{0}Prototype() given method descriptor for wrong service type.\");",
which);
writer.WriteLine("}");
writer.WriteLine("switch(method.Index) {");
writer.Indent();
foreach (MethodDescriptor method in Descriptor.Methods)
{
writer.WriteLine("case {0}:", method.Index);
writer.WriteLine(" return {0}.DefaultInstance;",
GetClassName(which == RequestOrResponse.Request ? method.InputType : method.OutputType));
}
writer.WriteLine("default:");
writer.WriteLine(" throw new global::System.InvalidOperationException(\"Can't get here.\");");
writer.Outdent();
writer.WriteLine("}");
writer.Outdent();
writer.WriteLine("}");
writer.WriteLine();
}
private void GenerateStub(TextGenerator writer)
{
writer.WriteLine("public static Stub CreateStub(pb::IRpcChannel channel) {");
writer.WriteLine(" return new Stub(channel);");
writer.WriteLine("}");
writer.WriteLine();
writer.WriteLine("[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]");
WriteGeneratedCodeAttributes(writer);
writer.WriteLine("{0} class Stub : {1} {{", ClassAccessLevel, GetClassName(Descriptor));
writer.Indent();
writer.WriteLine("internal Stub(pb::IRpcChannel channel) {");
writer.WriteLine(" this.channel = channel;");
writer.WriteLine("}");
writer.WriteLine();
writer.WriteLine("private readonly pb::IRpcChannel channel;");
writer.WriteLine();
writer.WriteLine("public pb::IRpcChannel Channel {");
writer.WriteLine(" get { return channel; }");
writer.WriteLine("}");
foreach (MethodDescriptor method in Descriptor.Methods)
{
writer.WriteLine();
writer.WriteLine("{0} override void {1}(", ClassAccessLevel,
NameHelpers.UnderscoresToPascalCase(method.Name));
writer.WriteLine(" pb::IRpcController controller,");
writer.WriteLine(" {0} request,", GetClassName(method.InputType));
writer.WriteLine(" global::System.Action<{0}> done) {{", GetClassName(method.OutputType));
writer.Indent();
writer.WriteLine("channel.CallMethod(Descriptor.Methods[{0}],", method.Index);
writer.WriteLine(" controller, request, {0}.DefaultInstance,", GetClassName(method.OutputType));
writer.WriteLine(" pb::RpcUtil.GeneralizeCallback<{0}, {0}.Builder>(done, {0}.DefaultInstance));",
GetClassName(method.OutputType));
writer.Outdent();
writer.WriteLine("}");
}
writer.Outdent();
writer.WriteLine("}");
}
}
}
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