content: package org.apache.cassandra.stress.generate.values;
  /*
   * 
   * 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.
   * 
   */
  
  
  import org.apache.cassandra.db.marshal.AbstractType;
  import org.apache.cassandra.stress.generate.Distribution;
  import org.apache.cassandra.stress.generate.DistributionFactory;
  import org.apache.cassandra.stress.settings.OptionDistribution;
  
  public abstract class Generator<T>
  {
  
      public final String name;
      public final AbstractType<?> type;
      public final Class<?> clazz;
      final long salt;
      final Distribution identityDistribution;
      final Distribution sizeDistribution;
      public final Distribution clusteringDistribution;
  
      public Generator(AbstractType<?> type, GeneratorConfig config, String name, Class<?> clazz)
      {
          this.type = type;
          this.name = name;
          this.clazz = clazz;
          this.salt = config.salt;
          this.identityDistribution = config.getIdentityDistribution(defaultIdentityDistribution());
          this.sizeDistribution = config.getSizeDistribution(defaultSizeDistribution());
          this.clusteringDistribution = config.getClusteringDistribution(defaultClusteringDistribution());
      }
  
      public void setSeed(long seed)
      {
          identityDistribution.setSeed(seed ^ salt);
          clusteringDistribution.setSeed(seed ^ ~salt);
      }
  
      public abstract T generate();
  
      DistributionFactory defaultIdentityDistribution()
      {
          return OptionDistribution.get("uniform(1..100B)");
      }
  
      DistributionFactory defaultSizeDistribution()
      {
          return OptionDistribution.get("uniform(4..8)");
      }
  
      DistributionFactory defaultClusteringDistribution()
      {
          return OptionDistribution.get("fixed(1)");
      }
  }
  