content: /*
   * Copyright (C) 2014 The 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 dexfuzz;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * A wrapper for a dictionary tracking what mutations have been performed.
   */
  public class MutationStats {
  
    public static class StatNotFoundException extends RuntimeException {
      private static final long serialVersionUID = -7038515184655168470L;
    }
  
    private Map<String,Long> stats;
    private List<String> statsOrder;
  
    public MutationStats() {
      stats = new HashMap<String,Long>();
      statsOrder = new ArrayList<String>();
    }
  
    public void incrementStat(String statName) {
      increaseStat(statName, 1);
    }
  
    /**
     * Increase the named stat by the specified amount.
     */
    public void increaseStat(String statName, long amt) {
      if (!stats.containsKey(statName)) {
        stats.put(statName, 0L);
        statsOrder.add(statName);
      }
      stats.put(statName, stats.get(statName) + amt);
    }
  
    /**
     * Get a string representing the collected stats - looks like a JSON dictionary.
     */
    public String getStatsString() {
      StringBuilder builder = new StringBuilder();
      builder.append("{");
      boolean first = true;
      for (String statName : statsOrder) {
        if (!first) {
          builder.append(", ");
        } else {
          first = false;
        }
        builder.append("\"").append(statName).append("\": ").append(stats.get(statName));
      }
      builder.append("}");
      return builder.toString();
    }
  }
  