MethodCountSet.java

/*
 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
 *
 *  This file is licensed to You under the Eclipse Public License (EPL);
 *  You may not use this file except in compliance with the License. You
 *  may obtain a copy of the License at
 *
 *      http://www.opensource.org/licenses/eclipse-1.0.php
 *
 *  See the COPYRIGHT.txt file distributed with this work for information
 *  regarding copyright ownership.
 */
package org.jikesrvm.adaptive.database.methodsamples;

import org.jikesrvm.VM;
import org.jikesrvm.compilers.common.CompiledMethod;

/**
 * Wrapper around a pair of parallel arrays:
 * <ol>
 *  <li>an array of compiled method id's
 *  <li>an array of counts: how many times each compiled method id is counted
 * </ol>
 */
public final class MethodCountSet {
  /**
   * array of compiled methods
   */
  CompiledMethod[] cms;
  /**
   * array of counts
   */
  double[] counters;

  /**
   * Constructor
   *
   * @param _cms array of compiled method ids
   * @param _counters array of counters
   */
  MethodCountSet(CompiledMethod[] _cms, double[] _counters) {
    if (VM.VerifyAssertions) VM._assert(_cms.length == _counters.length);
    cms = _cms;
    counters = _counters;
  }

  /**
   * String representation of fields
   *
   * @return string representation of compiled method id's and their counts
   */
  @Override
  public String toString() {
    StringBuilder ans = new StringBuilder();
    for (int i = 0; i < cms.length; i++) {
      ans.append(cms[i]);
      ans.append(" = ");
      ans.append(counters[i]);
      ans.append("\n");
    }
    return ans.toString();
  }
}