How to use

copyFrom

method

in

com.asakusafw.runtime.value.ValueOption

@SuppressWarnings("deprecation")
static <V extends ValueOption<V>> V update(V property, V newValue) {
  property.copyFrom(newValue);
  return property;
}

@SuppressWarnings("deprecation")
@Override
public E set(int index, E element) {
  if (index < 0 || index >= size()) {
    throw new IndexOutOfBoundsException();
  }
  E result = get(index);
  result.copyFrom(element);
  return result;
}

@SuppressWarnings({ "rawtypes", "unchecked", "deprecation" })
@Override
public final Object copyObject(Object o) {
  ValueOption<?> object = (ValueOption<?>) o;
  if (object == null || object.isNull()) {
    return null;
  }
  ValueOption copy = newObject();
  copy.copyFrom(object);
  return copy;
}

/**
 * Sets the specified value to this object only if the specified value is less than this object. However, if either
 * this object or the specified value represents {@code null}, this object will also turn to {@code null}.
 * @param other the target value
 */
public final void min(V other) {
  if (this == other) {
    return;
  }
  if (this.isNull() || other.isNull()) {
    setNull();
  } else if (compareTo(other) > 0) {
    copyFrom(other);
  }
}

  /**
   * Sets the specified value to this object only if the specified value is greater than this object. However, if
   * either this object or the specified value represents {@code null}, this object will also turn to {@code null}.
   * @param other the target value
   */
  public final void max(V other) {
    if (this == other) {
      return;
    }
    if (this.isNull() || other.isNull()) {
      setNull();
    } else if (compareTo(other) < 0) {
      copyFrom(other);
    }
  }
}