OkHttpClient that does not execute Retrofit requests on HttpURLConnection but directly on OkHttpClient

OkHttpClient22.java

import com.squareup.okhttp.Headers;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
import com.squareup.okhttp.ResponseBody;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import okio.BufferedSink;
import retrofit.client.Client;
import retrofit.client.Header;
import retrofit.mime.TypedInput;
import retrofit.mime.TypedOutput;

/**
 * Created by nikola on 12/25/14.
 */
public class OkHttpClient22 implements Client {
    private static OkHttpClient sClient = new OkHttpClient();
    public OkHttpClient22(){};
    public OkHttpClient22(OkHttpClient okClient){
        sClient = okClient;
    }
    @Override
    public retrofit.client.Response execute(retrofit.client.Request request) throws IOException {
        com.squareup.okhttp.Request okRequest = buildRequest(request);
        Response okResponse = sClient.newCall(okRequest).execute();
        retrofit.client.Response response = buildResponse(okResponse);
        return response;
    }

    private retrofit.client.Response buildResponse(Response okResponse) {
        TypedInput inputBody = new ResponseBodyWrapper(okResponse.body());
        retrofit.client.Response response =
                new retrofit.client.Response(okResponse.request().urlString(), okResponse.code(), okResponse.message(), getHeaders(okResponse.headers()), inputBody);
        return response;
    }

    private List<Header> getHeaders(Headers headers) {
        List<Header> retrofitHeaders = new ArrayList<Header>();
        int headerCount = headers.names().size();
        for(int i = 0; i < headerCount; i++){
            retrofitHeaders.add(new Header(headers.name(i),headers.value(i)));
        }
        return retrofitHeaders;
    }

    private com.squareup.okhttp.Request buildRequest(retrofit.client.Request request) {
        com.squareup.okhttp.Request.Builder requestBuilder = new com.squareup.okhttp.Request.Builder();
        //---copy headers---
        List<retrofit.client.Header> headers = request.getHeaders();
        Headers.Builder okHeadersBulder = new Headers.Builder();
        if(headers != null && headers.size() > 0) {
            for (Header h : headers) {
                okHeadersBulder.add(h.getName(), h.getValue());
            }
            requestBuilder.headers(okHeadersBulder.build());
        }
        //--- copy url ----
        requestBuilder.url(request.getUrl());
        //--- copy method and create request body---
        if(!request.getMethod().equalsIgnoreCase("GET"))
            requestBuilder.method(request.getMethod(), new RequestBodyWrapper(request.getBody()));
        else
            requestBuilder.get();
        return requestBuilder.build();
    }
}

RequestBodyWrapper.java

    public class RequestBodyWrapper extends RequestBody{
        private final TypedOutput mWrapped;

        public RequestBodyWrapper(TypedOutput output){
            mWrapped = output;
        }

        @Override
        public long contentLength() {
            return mWrapped.length();
        }

        @Override
        public MediaType contentType() {
            return MediaType.parse(mWrapped.mimeType());
        }

        @Override
        public void writeTo(BufferedSink sink) throws IOException {
            mWrapped.writeTo(sink.outputStream());
        }
    }

ResponseBodyWrapper.java

public class ResponseBodyWrapper implements TypedInput {
        private ResponseBody mWrapped;

        public ResponseBodyWrapper(ResponseBody body){
           mWrapped = body;
        }
        @Override
        public String mimeType() {
            return mWrapped.contentType().type();
        }

        @Override
        public long length() {
            return mWrapped.contentLength();
        }

        @Override
        public InputStream in() throws IOException {
            return mWrapped.byteStream();
        }
    }

Nice.