package org.andromda.cartridges.jsf.converters;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.ConverterException;
import javax.faces.el.ValueBinding;
import org.apache.myfaces.custom.calendar.HtmlCalendarRenderer.DateConverter;
/**
* Overrides the default DateTimeConverter to include conversion of Calendar
* instances as well as Date instances.
*
* <p>
* Unfortunately because of poor design in myfaces's calendar component, we have to implement
* DateConverter so that we can correctly convert to a date in the inputCalendar implementation.
* </p>
*
* @author Chad Brandon
*/
public class DateTimeConverter
extends javax.faces.convert.DateTimeConverter
implements DateConverter
{
/**
* @see javax.faces.convert.Converter#getAsString(javax.faces.context.FacesContext, javax.faces.component.UIComponent, java.lang.Object)
*/
public String getAsString(
FacesContext context,
UIComponent component,
Object value)
throws ConverterException
{
if (value instanceof Calendar)
{
value = ((Calendar)value).getTime();
}
final String pattern = this.getPattern();
String result = null;
if (value != null && pattern != null && pattern.trim().length() > 0)
{
DateFormat format = new SimpleDateFormat(pattern);
format.setTimeZone(this.getTimeZone());
result = format.format((Date)value);
}
return result;
}
/**
* @see javax.faces.convert.Converter#getAsObject(javax.faces.context.FacesContext, javax.faces.component.UIComponent, java.lang.String)
*/
public Object getAsObject(
FacesContext context,
UIComponent component,
String value)
throws ConverterException
{
Object asObject = null;
final Class componentType = this.getComponentType(
context,
component);
if (componentType != null)
{
asObject = super.getAsObject(
context,
component,
value);
if (Calendar.class.isAssignableFrom(componentType) && asObject instanceof Date)
{
final Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(this.getTimeZone());
calendar.setTime((Date)asObject);
asObject = calendar;
}
}
return asObject;
}
/**
* Gets the component type for the given <code>component</code>.
* @param context the current faces context.
* @param component the component from which to retrieve the type.
* @return true/false
*/
protected Class getComponentType(
final FacesContext context,
final UIComponent component)
{
Class type = null;
final ValueBinding binding = component.getValueBinding("value");
if (binding != null)
{
type = binding.getType(context);
}
return type;
}
/**
* Gets the component Value for the given <code>component</code>.
* @param context the current faces context.
* @param component the component from which to retrieve the value.
* @return true/false
*/
protected Object getComponentValue(
final FacesContext context,
final UIComponent component)
{
Object value = null;
final ValueBinding binding = component.getValueBinding("value");
if (binding != null)
{
value = binding.getValue(context);
}
return value;
}
private TimeZone timeZone;
/**
* @see #getTimeZone()
* @see javax.faces.convert.DateTimeConverter#restoreState(javax.faces.context.FacesContext, java.lang.Object)
*/
public void restoreState(FacesContext facesContext, Object state)
{
super.restoreState(facesContext, state);
Object values[] = (Object[])state;
this.timeZone = (TimeZone)values[4];
}
/**
* @see #getTimeZone()
* @see javax.faces.convert.DateTimeConverter#saveState(javax.faces.context.FacesContext)
*/
public Object saveState(FacesContext facesContext)
{
Object values[] = (Object[])super.saveState(facesContext);
values[4] = this.timeZone;
return values;
}
/**
* @see #getTimeZone()
* @see javax.faces.convert.DateTimeConverter#setTimeZone(java.util.TimeZone)
*/
public void setTimeZone(TimeZone timeZone)
{
this.timeZone = timeZone;
}
/**
* Overridden because the default timeZone is set as GMT, whereas it should be the default
* for the operating system (at least in my opinion).
*
* @see javax.faces.convert.DateTimeConverter#getTimeZone()
*/
public TimeZone getTimeZone()
{
return this.timeZone == null ? TimeZone.getDefault() : this.timeZone;
}
public static final String CONVERTER_ID = "andromda.faces.DateTime";
/**
* @see org.apache.myfaces.custom.calendar.HtmlCalendarRenderer.DateConverter#getAsDate(javax.faces.context.FacesContext, javax.faces.component.UIComponent)
*/
public Date getAsDate(
FacesContext context,
UIComponent component)
{
Object value = this.getComponentValue(
context,
component);
if (value instanceof Calendar)
{
value = ((Calendar)value).getTime();
}
return (Date)value;
}
}