content: /*
   *
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.cassandra.stress.generate.values;
  
  import org.apache.cassandra.db.marshal.UTF8Type;
  
  public class HexStrings extends Generator<String>
  {
      private final char[] chars;
  
      public HexStrings(String name, GeneratorConfig config)
      {
          super(UTF8Type.instance, config, name, String.class);
          chars = new char[(int) sizeDistribution.maxValue()];
      }
  
      @Override
      public String generate()
      {
          long seed = identityDistribution.next();
          sizeDistribution.setSeed(seed);
          int size = (int) sizeDistribution.next();
          for (int i = 0 ; i < size ; i +=16)
          {
              long value = identityDistribution.next();
              for (int j = 0 ; j < 16 && i + j < size ; j++)
              {
                  int v = (int) (value & 15);
                  chars[i + j] = (char) ((v < 10 ? '0' : 'A') + v);
                  value >>>= 4;
              }
          }
          return new String(chars, 0, size);
      }
  }
  