protected void setDatePropertyValue(DateProperty prop,
                                    Date date) {
    if (prop == null) {
        return;
    }
    Value value = (Value)
        prop.getParameters().getParameter(Parameter.VALUE);
    if (value != null) {
        prop.getParameters().remove(value);
    }
    
    // Add VALUE=DATE for Date values, otherwise
    // leave out VALUE=DATE-TIME because it is redundant
    if(! (date instanceof DateTime)) {
        prop.getParameters().add(Value.DATE);
    }
}
 

/**
 * Sets date property value
 * @param prop The date property.
 * @param date The date.
 */
protected void setDatePropertyValue(DateProperty prop, Date date) {
    if (prop == null) {
        return;
    }
    Value value = (Value) prop.getParameters()
            .getParameter(Parameter.VALUE);
    if (value != null) {
        prop.getParameters().remove(value);
    }

    // Add VALUE=DATE for Date values, otherwise
    // leave out VALUE=DATE-TIME because it is redundant
    if (!(date instanceof DateTime)) {
        prop.getParameters().add(Value.DATE);
    }
}
 

/**
 * Evaluates property.
 * @param property The proeprty.
 * @param filter The time range filter.
 * @return The result.
 */
private boolean evaluate(Property property, TimeRangeFilter filter) {
    if(!(property instanceof DateProperty) ) {
        return false;
    }
    
    DateProperty dateProp = (DateProperty) property;
    Date date = dateProp.getDate();
    
    return date.before(filter.getPeriod().getEnd()) &&
           date.after(filter.getPeriod().getStart()) ||
           date.equals(filter.getPeriod().getStart()) ;
}
 

/**
 * @param comp The component.
 */
private void componentToUTC(Component comp) {
    // Do to each top-level property
    for (Property prop : (List<Property>) comp.getProperties()) {
        if (prop instanceof DateProperty) {
            DateProperty dprop = (DateProperty) prop;
            Date date = dprop.getDate();
            if (date instanceof DateTime &&
                (((DateTime) date).getTimeZone() != null)) {
                dprop.setUtc(true);
            }
        }
    }

    // Do to each embedded component
    ComponentList<? extends CalendarComponent> subcomps = null;
    if (comp instanceof VEvent) {
        subcomps = ((VEvent) comp).getAlarms() ;
    }
    else if (comp instanceof VToDo) {
        subcomps = ((VToDo)comp).getAlarms();
    }

    if (subcomps != null) {
        for (CalendarComponent subcomp :  subcomps) {
            componentToUTC(subcomp);
        }
    }
}
 

private void fixDateTimeProperties(Component component) {
    PropertyList<Property> props = component.getProperties();
    for(Property prop : props) {
        if(prop instanceof DateProperty || prop instanceof DateListProperty) {
            Value v = (Value) prop.getParameter(Parameter.VALUE);
            if(Value.DATE_TIME.equals(v)) {
                prop.getParameters().remove(v);
            }
        }
    }
}
 

/**
 * Constructor used when generating JSON
 * 
 * @param dateProperty
 */
public JsonDatePropertyAdapter(DateProperty dateProperty) {
    _dateProperty = dateProperty;
}