code: /*
   * Copyright 2014 Google Inc. All rights reserved.
   *
   * 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.
   */
  
  // THIS IS MODIFIED COPY OF THE "L" PLATFORM CLASS. BE CAREFUL ABOUT EDITS.
  // THIS CODE SHOULD FOLLOW ANDROID STYLE.
  //
  // Changes:
  //   Removed the last two equals() methods.
  
  package org.physical_web.physicalweb.ble;
  
  import android.util.SparseArray;
  
  import java.util.Arrays;
  import java.util.Iterator;
  import java.util.Map;
  
  /**
   * Helper class for Bluetooth LE utils.
   *
   * @hide
   */
  public class Utils {
  
      /**
       * Returns a string composed from a {@link SparseArray}.
       */
      static String toString(SparseArray<byte[]> array) {
          if (array == null) {
              return "null";
          }
          if (array.size() == 0) {
              return "{}";
          }
          StringBuilder buffer = new StringBuilder();
          buffer.append('{');
          for (int i = 0; i < array.size(); ++i) {
              buffer.append(array.keyAt(i)).append('=').append(array.valueAt(i));
          }
          buffer.append('}');
          return buffer.toString();
      }
  
      /**
       * Returns a string composed from a {@link Map}.
       */
      static <T> String toString(Map<T, byte[]> map) {
          if (map == null) {
              return "null";
          }
          if (map.isEmpty()) {
              return "{}";
          }
          StringBuilder buffer = new StringBuilder();
          buffer.append('{');
          Iterator<Map.Entry<T, byte[]>> it = map.entrySet().iterator();
          while (it.hasNext()) {
              Map.Entry<T, byte[]> entry = it.next();
              Object key = entry.getKey();
              buffer.append(key).append('=').append(Arrays.toString(map.get(key)));
              if (it.hasNext()) {
                  buffer.append(", ");
              }
          }
          buffer.append('}');
          return buffer.toString();
      }
  }
  