Migrate from Gradle to Maven.

- Restructure source to src/{main,test} style
- Add pom.xml and update Android.mk
- Migrate all tests to JUnit4 and Robolectric
 - RequestQueueTest is currently @Ignored as fixing it will
   involve more extensive refactoring.
- Main library still builds in Gradle; tests do not

Change-Id: I1edc53bb1a54f64d3e806e4572901295ef63e2ca

1 files changed, 45 insertions, 0 deletions

diff --git a/src/main/java/com/android/volley/toolbox/HttpStack.java b/src/main/java/com/android/volley/toolbox/HttpStack.java
new file mode 100644
index 0000000..a52fd06
--- /dev/null
+++ b/src/main/java/com/android/volley/toolbox/HttpStack.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.volley.toolbox;
+
+import com.android.volley.AuthFailureError;
+import com.android.volley.Request;
+
+import org.apache.http.HttpResponse;
+
+import java.io.IOException;
+import java.util.Map;
+
+/**
+ * An HTTP stack abstraction.
+ */
+public interface HttpStack {
+    /**
+     * Performs an HTTP request with the given parameters.
+     *
+     * <p>A GET request is sent if request.getPostBody() == null. A POST request is sent otherwise,
+     * and the Content-Type header is set to request.getPostBodyContentType().</p>
+     *
+     * @param request the request to perform
+     * @param additionalHeaders additional headers to be sent together with
+     *         {@link Request#getHeaders()}
+     * @return the HTTP response
+     */
+    public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)
+        throws IOException, AuthFailureError;
+
+}