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/*
 * 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.lucene.benchmark.byTask.tasks;

import java.util.LinkedHashMap;
import java.util.List;
import org.apache.lucene.benchmark.byTask.PerfRunData;
import org.apache.lucene.benchmark.byTask.stats.Report;
import org.apache.lucene.benchmark.byTask.stats.TaskStats;

/**
 * Report by-name-prefix statistics aggregated by name. 

 * Other side effects: None.
 */
public class RepSumByPrefTask extends ReportTask {

  public RepSumByPrefTask(PerfRunData runData) {
    super(runData);
  }

  protected String prefix;

  @Override
  public int doLogic() throws Exception {
    Report rp = reportSumByPrefix(getRunData().getPoints().taskStats());

    System.out.println();
    System.out.println(
        "------------> Report Sum By Prefix ("
            + prefix
            + ") ("
            + rp.getSize()
            + " about "
            + rp.getReported()
            + " out of "
            + rp.getOutOf()
            + ")");
    System.out.println(rp.getText());
    System.out.println();

    return 0;
  }

  protected Report reportSumByPrefix(List taskStats) {
    // aggregate by task name
    int reported = 0;
    LinkedHashMap p2 = new LinkedHashMap<>();
    for (final TaskStats stat1 : taskStats) {
      if (stat1.getElapsed() >= 0
          && stat1.getTask().getName().startsWith(prefix)) { // only ended tasks with proper name
        reported++;
        String name = stat1.getTask().getName();
        TaskStats stat2 = p2.get(name);
        if (stat2 == null) {
          try {
            stat2 = stat1.clone();
          } catch (CloneNotSupportedException e) {
            throw new RuntimeException(e);
          }
          p2.put(name, stat2);
        } else {
          stat2.add(stat1);
        }
      }
    }
    // now generate report from secondary list p2
    return genPartialReport(reported, p2, taskStats.size());
  }

  public void setPrefix(String prefix) {
    this.prefix = prefix;
  }

  /* (non-Javadoc)
   * @see PerfTask#toString()
   */
  @Override
  public String toString() {
    return super.toString() + " " + prefix;
  }
}