Ejemplo n.º 1
0
  /**
   * Reduce By
   *
   * @param array array of items to reduce by
   * @param length where to end in the array
   * @param function function
   * @param function functionName
   * @return reduction
   */
  public static long reduceBy(final int[] array, int length, Object function, String functionName) {

    if (function.getClass().isAnonymousClass()) {
      return reduceByR(array, length, function, functionName);
    }

    try {
      ConstantCallSite callSite =
          Invoker.invokeReducerLongIntReturnLongMethodHandle(function, functionName);
      MethodHandle methodHandle = callSite.dynamicInvoker();
      try {

        long sum = 0;
        for (int index = 0; index < length; index++) {
          int v = array[index];
          sum = (long) methodHandle.invokeExact(sum, v);
        }
        return sum;
      } catch (Throwable throwable) {
        return handle(Long.class, throwable, "Unable to perform reduceBy");
      }
    } catch (Exception ex) {
      return reduceByR(array, length, function, functionName);
    }
  }
Ejemplo n.º 2
0
  /**
   * Reflection based reduce by.
   *
   * @param array array of items to reduce by
   * @param object function
   * @param methodName name of method
   * @param <T> type of function
   * @return reduction
   */
  private static <T> long reduceByR(final int[] array, T object, String methodName) {
    try {

      Method method = Invoker.invokeReducerLongIntReturnLongMethod(object, methodName);

      long sum = 0;
      for (int v : array) {
        sum = (long) method.invoke(object, sum, v);
      }
      return sum;

    } catch (Throwable throwable) {
      return handle(Long.class, throwable, "Unable to perform reduceBy");
    }
  }
Ejemplo n.º 3
0
  /**
   * Reflection based reduce by.
   *
   * @param array array of items to reduce by
   * @param object function
   * @param <T> type of function
   * @return reduction
   */
  private static <T> long reduceByR(final int[] array, int length, T object) {
    try {

      Method method = Invoker.invokeReducerLongIntReturnLongMethod(object);

      long sum = 0;
      for (int index = 0; index < length; index++) {
        int v = array[index];
        sum = (long) method.invoke(object, sum, v);
      }
      return sum;

    } catch (Throwable throwable) {
      return handle(Long.class, throwable, "Unable to perform reduceBy");
    }
  }
Ejemplo n.º 4
0
  public Group(Grouping grouping, Class<?> cls, List<?> list) {
    this.grouping = grouping;

    ArrayList<Criteria> criteriaArrayList = new ArrayList();
    List<List<?>> lists = (List<List<?>>) list;
    for (List args : lists) {
      args = new ArrayList(args);
      args.add(1, cls);

      Object o = atIndex(args, -1);
      if (!(o instanceof List)) {
        atIndex(args, -1, Collections.singletonList(o));
      }
      Criteria criteria =
          (Criteria) Invoker.invokeFromObject(ObjectFilter.class, "createCriteriaFromClass", args);
      criteriaArrayList.add(criteria);
    }
    this.expressions = criteriaArrayList;
  }
Ejemplo n.º 5
0
  /**
   * Reduce by functional support for int arrays.
   *
   * @param array array of items to reduce by
   * @param object object that contains the reduce by function
   * @param <T> the type of object
   * @return the final reduction
   */
  public static <T> long reduceBy(final int[] array, T object) {
    if (object.getClass().isAnonymousClass()) {
      return reduceByR(array, object);
    }

    try {
      ConstantCallSite callSite = Invoker.invokeReducerLongIntReturnLongMethodHandle(object);
      MethodHandle methodHandle = callSite.dynamicInvoker();
      try {

        long sum = 0;
        for (int v : array) {
          sum = (long) methodHandle.invokeExact(sum, v);
        }
        return sum;
      } catch (Throwable throwable) {
        return handle(Long.class, throwable, "Unable to perform reduceBy");
      }
    } catch (Exception ex) {
      return reduceByR(array, object);
    }
  }