1 files changed, 84 insertions, 0 deletions
diff --git a/core/src/main/java/com/android/volley/Response.java b/core/src/main/java/com/android/volley/Response.java
new file mode 100644
index 0000000..622bdc4
--- /dev/null
+++ b/core/src/main/java/com/android/volley/Response.java
@@ -0,0 +1,84 @@
+/*
+ * 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;
+
+import androidx.annotation.Nullable;
+
+/**
+ * Encapsulates a parsed response for delivery.
+ *
+ * @param <T> Parsed type of this response
+ */
+public class Response<T> {
+
+    /** Callback interface for delivering parsed responses. */
+    public interface Listener<T> {
+        /** Called when a response is received. */
+        void onResponse(T response);
+    }
+
+    /** Callback interface for delivering error responses. */
+    public interface ErrorListener {
+        /**
+         * Callback method that an error has been occurred with the provided error code and optional
+         * user-readable message.
+         */
+        void onErrorResponse(VolleyError error);
+    }
+
+    /** Returns a successful response containing the parsed result. */
+    public static <T> Response<T> success(@Nullable T result, @Nullable Cache.Entry cacheEntry) {
+        return new Response<>(result, cacheEntry);
+    }
+
+    /**
+     * Returns a failed response containing the given error code and an optional localized message
+     * displayed to the user.
+     */
+    public static <T> Response<T> error(VolleyError error) {
+        return new Response<>(error);
+    }
+
+    /** Parsed response, can be null; always null in the case of error. */
+    @Nullable public final T result;
+
+    /** Cache metadata for this response; null if not cached or in the case of error. */
+    @Nullable public final Cache.Entry cacheEntry;
+
+    /** Detailed error information if <code>errorCode != OK</code>. */
+    @Nullable public final VolleyError error;
+
+    /** True if this response was a soft-expired one and a second one MAY be coming. */
+    public boolean intermediate = false;
+
+    /** Returns whether this response is considered successful. */
+    public boolean isSuccess() {
+        return error == null;
+    }
+
+    private Response(@Nullable T result, @Nullable Cache.Entry cacheEntry) {
+        this.result = result;
+        this.cacheEntry = cacheEntry;
+        this.error = null;
+    }
+
+    private Response(VolleyError error) {
+        this.result = null;
+        this.cacheEntry = null;
+        this.error = error;
+    }
+}