Remove OkHttpCall dependency on ServiceMethod

Inject the necessary components for it to complete the HTTP request on its own.

retrofit/src/main/java/retrofit2/OkHttpCall.java

@@ -30,8 +30,10 @@
 import static retrofit2.Utils.throwIfFatal;
 
 final class OkHttpCall<T> implements Call<T> {
-  private final ServiceMethod<T, ?> serviceMethod;
+  private final RequestFactory requestFactory;
   private final @Nullable Object[] args;
+  private final okhttp3.Call.Factory callFactory;
+  private final Converter<ResponseBody, T> responseConverter;
 
   private volatile boolean canceled;
 
@@ -42,14 +44,17 @@ final class OkHttpCall<T> implements Call<T> {
   @GuardedBy("this")
   private boolean executed;
 
-  OkHttpCall(ServiceMethod<T, ?> serviceMethod, @Nullable Object[] args) {
-    this.serviceMethod = serviceMethod;
+  OkHttpCall(RequestFactory requestFactory, @Nullable Object[] args,
+      okhttp3.Call.Factory callFactory, Converter<ResponseBody, T> responseConverter) {
+    this.requestFactory = requestFactory;
     this.args = args;
+    this.callFactory = callFactory;
+    this.responseConverter = responseConverter;
   }
 
   @SuppressWarnings("CloneDoesntCallSuperClone") // We are a final type & this saves clearing state.
   @Override public OkHttpCall<T> clone() {
-    return new OkHttpCall<>(serviceMethod, args);
+    return new OkHttpCall<>(requestFactory, args, callFactory, responseConverter);
   }
 
   @Override public synchronized Request request() {
@@ -182,7 +187,7 @@ private void callFailure(Throwable e) {
   }
 
   private okhttp3.Call createRawCall() throws IOException {
-    okhttp3.Call call = serviceMethod.toCall(args);
+    okhttp3.Call call = callFactory.newCall(requestFactory.create(args));
     if (call == null) {
       throw new NullPointerException("Call.Factory returned null.");
     }
@@ -215,7 +220,7 @@ Response<T> parseResponse(okhttp3.Response rawResponse) throws IOException {
 
     ExceptionCatchingRequestBody catchingBody = new ExceptionCatchingRequestBody(rawBody);
     try {
-      T body = serviceMethod.toResponse(catchingBody);
+      T body = responseConverter.convert(catchingBody);
       return Response.success(body, rawResponse);
     } catch (RuntimeException e) {
       // If the underlying source threw an exception, propagate that rather than indicating it was

retrofit/src/main/java/retrofit2/ServiceMethod.java

@@ -15,7 +15,6 @@
  */
 package retrofit2;
 
-import java.io.IOException;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.lang.reflect.Type;
@@ -41,18 +40,9 @@ static <ResponseT, ReturnT> ServiceMethod<ResponseT, ReturnT> parseAnnotations(R
     responseConverter = builder.responseConverter;
   }
 
-  /** Builds an HTTP request from method arguments. */
-  okhttp3.Call toCall(@Nullable Object[] args) throws IOException {
-    return callFactory.newCall(requestFactory.create(args));
-  }
-
   ReturnT invoke(@Nullable Object[] args) {
-    return callAdapter.adapt(new OkHttpCall<>(this, args));
-  }
-
-  /** Builds a method return value from an HTTP response body. */
-  ResponseT toResponse(ResponseBody body) throws IOException {
-    return responseConverter.convert(body);
+    return callAdapter.adapt(
+        new OkHttpCall<>(requestFactory, args, callFactory, responseConverter));
   }
 
   /**