How to use net.fortuna.ical4j.validate

/**
 * Initialise a Calendar object using the default configured validator.
 * @param properties a list of initial calendar properties
 * @param components a list of initial calendar components
 */
public Calendar(PropertyList<Property> properties, ComponentList<CalendarComponent> components) {
  this(properties, components, AbstractCalendarValidatorFactory.getInstance().newInstance());
}

  @Override
  public void validate() throws ValidationException {
    validator.validate(this);
  }
}

  @Override
  public Validator<Calendar> newInstance() {
    return new CalendarValidatorImpl();
  }
}

  public void validate() throws ValidationException {
    throw new ValidationException();
  }
};

/**
 * @param aName   a property identifier
 * @param aList   a list of initial parameters
 * @param factory the factory used to create the property instance
 */
protected Property(final String aName, final ParameterList aList, PropertyFactoryImpl factory) {
  this(aName, aList, new EmptyValidator<Property>(), factory);
}

/**
 * Initialise a Calendar object using the default configured validator.
 * @param properties a list of initial calendar properties
 * @param components a list of initial calendar components
 */
public Calendar(PropertyList<Property> properties, ComponentList<CalendarComponent> components) {
  this(properties, components, AbstractCalendarValidatorFactory.getInstance().newInstance());
}

/**
 * Perform validation on a property.
 *
 * @throws ValidationException where the property is not in a valid state
 */
public void validate() throws ValidationException {
  validator.validate(this);
}

  @Override
  public Validator<Calendar> newInstance() {
    return new CalendarValidatorImpl();
  }
}

/**
 * @param aName   a property identifier
 * @param aList   a list of initial parameters
 * @param factory the factory used to create the property instance
 */
protected Property(final String aName, final ParameterList aList, PropertyFactoryImpl factory) {
  this(aName, aList, new EmptyValidator<Property>(), factory);
}

/**
 * Initialise a Calendar object using the default configured validator.
 * @param properties a list of initial calendar properties
 * @param components a list of initial calendar components
 */
public Calendar(PropertyList properties, ComponentList<CalendarComponent> components) {
  this(properties, components, AbstractCalendarValidatorFactory.getInstance().newInstance());
}

  @Override
  public void validate() throws ValidationException {
    validator.validate(this);
  }
}

  @Override
  public Validator<Calendar> newInstance() {
    return new CalendarValidatorImpl();
  }
}

/**
 * Initialise a Calendar object using the default configured validator.
 * @param properties a list of initial calendar properties
 * @param components a list of initial calendar components
 */
public Calendar(PropertyList<Property> properties, ComponentList<CalendarComponent> components) {
  this(properties, components, AbstractCalendarValidatorFactory.getInstance().newInstance());
}

  @Override
  public void validate() throws ValidationException {
    validator.validate(this);
  }
}

  @Override
  public Validator<Calendar> newInstance() {
    return new CalendarValidatorImpl();
  }
}

  @Override
  public void validate() throws ValidationException {
    validator.validate(this);
  }
}

@Override
public void validate() throws ValidationException {
  validator.validate(this);
}

@Override
public void validate() throws ValidationException {
  validator.validate(this);
}

@Override
public void validate() throws ValidationException {
  validator.validate(this);
}

/**
 * Perform validation on a property.
 *
 * @throws ValidationException where the property is not in a valid state
 */
public void validate() throws ValidationException {
  validator.validate(this);
}