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A testing framework for the JVM
There is a newer version: 7.10.1
package org.testng;

import org.testng.collections.Maps;
import org.testng.internal.XmlMethodSelector;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;

/**
 * This class maintains a map of {@code >}.
 * It is used by TestWorkers to determine if the method they just ran
 * is the last of its class, in which case it's time to invoke all the
 * afterClass methods.
 *
 * @author Alex Popescu
 */
public class ClassMethodMap {
  private Map> classMap = Maps.newConcurrentMap();
  // These two variables are used throughout the workers to keep track
  // of what beforeClass/afterClass methods have been invoked
  private Map> beforeClassMethods = Maps.newHashMap();
  private Map> afterClassMethods = Maps.newHashMap();

  public ClassMethodMap(List methods, XmlMethodSelector xmlMethodSelector) {
    for (ITestNGMethod m : methods) {
      // Only add to the class map methods that are included in the
      // method selector. We can pass a null context here since the selector
      // should already have been initialized
      if (xmlMethodSelector != null && ! xmlMethodSelector.includeMethod(null, m, true)) {
        continue;
      }

      Object instance = m.getInstance();
      Collection l = classMap.get(instance);
      if (l == null) {
        l = new ConcurrentLinkedQueue<>();
        classMap.put(instance, l);
      }
      l.add(m);
    }
  }

  /**
   * Remove the method from this map and returns true if it is the last
   * of its class.
   */
  public boolean removeAndCheckIfLast(ITestNGMethod m, Object instance) {
    Collection l = classMap.get(instance);
    if (l == null) {
      throw new AssertionError("l should not be null");
    }
    l.remove(m);
    // It's the last method of this class if all the methods remaining in the list belong to a
    // different class
    for (ITestNGMethod tm : l) {
      if (tm.getEnabled() && tm.getTestClass().equals(m.getTestClass())) {
        return false;
      }
    }
    return true;
  }

  public Map> getInvokedBeforeClassMethods() {
    return beforeClassMethods;
  }

  public Map> getInvokedAfterClassMethods() {
    return afterClassMethods;
  }

  public void clear() {
    for(Set