content: package org.apache.cassandra.stress.settings;
  /*
   * 
   * 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 java.io.PrintStream;
  import java.io.Serializable;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import com.google.common.collect.ImmutableList;
  
  public abstract class GroupedOptions implements Serializable
  {
  
      int accepted = 0;
  
      public boolean accept(String param)
      {
          for (Option option : options())
          {
              if (option.accept(param))
              {
                  accepted++;
                  return true;
              }
          }
          return false;
      }
  
      public boolean happy()
      {
          for (Option option : options())
              if (!option.happy())
                  return false;
          return true;
      }
  
      public abstract List<? extends Option> options();
  
      // hands the parameters to each of the option groups, and returns the first provided
      // option group that is happy() after this is done, that also accepted all the parameters
      public static <G extends GroupedOptions> G select(String[] params, G... groupings)
      {
          for (String param : params)
          {
              boolean accepted = false;
              for (GroupedOptions grouping : groupings)
                  accepted |= grouping.accept(param);
              if (!accepted)
                  throw new IllegalArgumentException("Invalid parameter " + param);
          }
          for (G grouping : groupings)
              if (grouping.happy() && grouping.accepted == params.length)
                  return grouping;
          return null;
      }
  
      // pretty prints all of the option groupings
      public static void printOptions(PrintStream out, String command, GroupedOptions... groupings)
      {
          out.println();
          boolean firstRow = true;
          for (GroupedOptions grouping : groupings)
          {
              if (!firstRow)
              {
                  out.println(" OR ");
              }
              firstRow = false;
  
              StringBuilder sb = new StringBuilder("Usage: ").append(command);
              for (Option option : grouping.options())
              {
                  sb.append(" ");
                  sb.append(option.shortDisplay());
              }
              out.println(sb.toString());
          }
          out.println();
          final Set<Option> printed = new HashSet<>();
          for (GroupedOptions grouping : groupings)
          {
              for (Option option : grouping.options())
              {
                  if (printed.add(option))
                  {
                      if (option.longDisplay() != null)
                      {
                          out.println("  " + option.longDisplay());
                          for (String row : option.multiLineDisplay())
                              out.println("      " + row);
                      }
                  }
              }
          }
      }
  
      public String getOptionAsString()
      {
          StringBuilder sb = new StringBuilder();
          for (Option option : options())
          {
              sb.append(option.getOptionAsString());
              sb.append("; ");
          }
          return sb.toString();
      }
  
  
      public static List<? extends Option> merge(List<? extends Option> ... optionss)
      {
          ImmutableList.Builder<Option> builder = ImmutableList.builder();
          for (List<? extends Option> options : optionss)
              for (Option option : options)
                  if (option instanceof OptionSimple && ((OptionSimple) option).isRequired())
                      builder.add(option);
          for (List<? extends Option> options : optionss)
              for (Option option : options)
                  if (!(option instanceof OptionSimple && ((OptionSimple) option).isRequired()))
                      builder.add(option);
          return builder.build();
      }
  
      static String formatLong(String longDisplay, String description)
      {
          return String.format("%-40s %s", longDisplay, description);
      }
  
      static String formatMultiLine(String longDisplay, String description)
      {
          return String.format("%-36s %s", longDisplay, description);
      }
  
  }
  