content: /*
   * 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.cjj.volley;
  
  /**
   * 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. */
          public 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.
           */
          public void onErrorResponse(VolleyError error);
      }
  
      /** Returns a successful response containing the parsed result. */
      public static <T> Response<T> success(T result, Cache.Entry cacheEntry) {
          return new Response<T>(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<T>(error);
      }
  
      /** Parsed response, or null in the case of error. */
      public final T result;
  
      /** Cache metadata for this response, or null in the case of error. */
      public final Cache.Entry cacheEntry;
  
      /** Detailed error information if <code>errorCode != OK</code>. */
      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(T result, 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;
      }
  }
  