content: /*
   *
   *  *    Copyright (C) 2019 Amit Shekhar
   *  *    Copyright (C) 2011 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.amitshekhar.utils;
  
  import java.io.UnsupportedEncodingException;
  
  /**
   * Created by amitshekhar on 06/02/17.
   */
  
  public class ConverterUtils {
  
      private static final int MAX_BLOB_LENGTH = 512;
  
      private static final String UNKNOWN_BLOB_LABEL = "{blob}";
  
      private ConverterUtils() {
          // This class in not publicly instantiable
      }
  
      public static String blobToString(byte[] blob) {
          if (blob.length <= MAX_BLOB_LENGTH) {
              if (fastIsAscii(blob)) {
                  try {
                      return new String(blob, "US-ASCII");
                  } catch (UnsupportedEncodingException ignored) {
  
                  }
              }
          }
          return UNKNOWN_BLOB_LABEL;
      }
  
      public static boolean fastIsAscii(byte[] blob) {
          for (byte b : blob) {
              if ((b & ~0x7f) != 0) {
                  return false;
              }
          }
          return true;
      }
  
  }
  