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DateFormat
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import java.math.BigDecimal; | |
import java.text.DecimalFormat; | |
import java.text.DecimalFormatSymbols; | |
import java.text.NumberFormat; | |
import java.text.ParseException; | |
import java.text.ParsePosition; | |
import java.text.SimpleDateFormat; | |
import java.util.Date; | |
import java.util.HashMap; | |
import java.util.Locale; | |
import java.util.Map; | |
import javax.annotation.Nullable; | |
import javax.el.Expression; | |
import javax.faces.component.FacesComponent; | |
import javax.validation.constraints.NotNull; | |
import org.springframework.beans.factory.annotation.Autowire; | |
import org.springframework.stereotype.Component; | |
/** | |
* Singleton que se encarga de realizar los formatos de {@link Date} y | |
* {@link BigDecimal} en el sistema. | |
* <p> | |
* Todas las conversiones de {@link String} a {@link Date} o {@link BigDecimal} | |
* <b>deben</b> ser realizadas por esta clase. | |
* </p> | |
* <p> | |
* Para acceder a este componente se pueden utilizar alguno de los siguientes | |
* mecanismos: | |
* <ol> | |
* <li> {@link Expression}: #{fp}</li> | |
* <li> {@link Component}: {@literal @}{@link Autowire} {@link FormatProvider} | |
* fp;</li> | |
* <li> {@link FacesComponent}: Util.getSpringBeanByJSFContext(context, | |
* FormatProvider.class)</li> | |
* | |
* </ol> | |
* </p> | |
* | |
* @author Arturo Volpe | |
* @since 2.2 | |
* @version 1.0 Sep 10, 2013 | |
*/ | |
@Component(value = DateFormat.FORMAT_PROVIDER_NAME) | |
public class DateFormat { | |
/** | |
* Nombre de este bean, se reduce el nombre para disminuir la verbosidad | |
* desde jsf. | |
*/ | |
public static final String FORMAT_PROVIDER_NAME = "df"; | |
/** | |
* Formato de las fechas en el sistema. Este formato incluye el año | |
* completo, y esta separado por guiones. | |
* <p> | |
* Si se desea que se formateen hora y minutos ver {@link #DATETIME_FORMAT} | |
* </p> | |
* | |
* @see #DATE_SHORT_FORMAT | |
*/ | |
public static final String DATE_FORMAT = "dd-MM-yyyy"; | |
/** | |
* Formato de las fechas cortas, este formato incluye los dos últimos | |
* numeros de la fecha. | |
* <p> | |
* Si se desea que se formateen hora y los minutos, ver | |
* {@link #DATETIME_SHORT_FORMAT} | |
* </p> | |
* | |
* @see #DATE_FORMAT | |
*/ | |
public static final String DATE_SHORT_FORMAT = "dd-MM-yy"; | |
/** | |
* Formato de las fechas que representan horas y minutos, no incluye los | |
* segundos. | |
* | |
*/ | |
public static final String TIME_FORMAT = "HH:mm"; | |
/** | |
* Formato de las fechas con horas y minutos. | |
* <p> | |
* Este formato incluye el año completo separado por guiones. | |
* </p> | |
* | |
* | |
* @see #DATE_SHORT_FORMAT | |
*/ | |
public static final String DATETIME_FORMAT = "dd-MM-yyyy HH:mm"; | |
/** | |
* Formato de las fechas cortas con horas y minutos. | |
* <p> | |
* Este formato incluye el año completo separado por guiones. | |
* </p> | |
*/ | |
public static final String DATETIME_SHORT_FORMAT = "dd-MM-yy HH:mm"; | |
private static final String EMPTY_STRING = ""; | |
private Map<String, SimpleDateFormat> formats; | |
private boolean initialized = false; | |
private DecimalFormatSymbols dfs; | |
private synchronized void init() { | |
if (initialized) { | |
return; | |
} | |
initialized = true; | |
formats = new HashMap<String, SimpleDateFormat>(5); | |
formats.put(DATE_FORMAT, new SimpleDateFormat(DATE_FORMAT)); | |
formats.put(DATE_SHORT_FORMAT, new SimpleDateFormat(DATE_SHORT_FORMAT)); | |
formats.put(TIME_FORMAT, new SimpleDateFormat(TIME_FORMAT)); | |
formats.put(DATETIME_FORMAT, new SimpleDateFormat(DATETIME_FORMAT)); | |
formats.put(DATETIME_SHORT_FORMAT, new SimpleDateFormat( | |
DATETIME_SHORT_FORMAT)); | |
for (SimpleDateFormat sdf : formats.values()) { | |
sdf.setLenient(false); | |
} | |
} | |
/** | |
* Formatea una fecha con el formato {@link #DATE_SHORT_FORMAT} | |
* <p> | |
* Esta fecha debe ser usada en grillas y en lugares donde el espacio es | |
* reducido. Si es el caso en que se deben mostrar horas y minutos, se debe | |
* usar {@link #asShortDateTime(Date)} o {@link #asTime(Date)}. | |
* </p> | |
* | |
* @param date | |
* fecha que se desea parsear. | |
* @return cadena con el formato {@link #DATE_SHORT_FORMAT}, retorna | |
* <code>""</code> si el parámetro es <code>null</code> | |
*/ | |
public String asShortDate(@Nullable Date date) { | |
return dateToString(date, DATE_SHORT_FORMAT); | |
} | |
public Date parseShortDate(@Nullable String string) throws ParseException { | |
return stringToDate(string, DATE_SHORT_FORMAT); | |
} | |
public String asDate(@Nullable Date date) { | |
return dateToString(date, DATE_FORMAT); | |
} | |
public Date parseDate(@Nullable String string) throws ParseException { | |
return stringToDate(string, DATE_FORMAT); | |
} | |
public String asTime(@Nullable Date date) { | |
return dateToString(date, TIME_FORMAT); | |
} | |
public Date parseTime(@Nullable String string) throws ParseException { | |
return stringToDate(string, TIME_FORMAT); | |
} | |
public String asDateTime(@Nullable Date date) { | |
return dateToString(date, DATETIME_FORMAT); | |
} | |
public Date parseDateTime(@Nullable String string) throws ParseException { | |
return stringToDate(string, DATETIME_FORMAT); | |
} | |
public String asShortDateTime(@Nullable Date date) { | |
return dateToString(date, DATETIME_SHORT_FORMAT); | |
} | |
public Date parseShortDateTime(@Nullable String string) | |
throws ParseException { | |
return stringToDate(string, DATETIME_SHORT_FORMAT); | |
} | |
protected synchronized String dateToString(Date date, String format) { | |
if (date == null) { | |
return EMPTY_STRING; | |
} | |
return getFormat(format).format(date); | |
} | |
/** | |
* @param string | |
* @return | |
* @throws ParseException | |
*/ | |
protected synchronized Date stringToDate(String string, String format) | |
throws ParseException { | |
if (string == null || EMPTY_STRING.equals(string)) { | |
return null; | |
} | |
SimpleDateFormat sdf = getFormat(format); | |
ParsePosition psp = new ParsePosition(0); | |
if (string.length() != format.length()) { | |
throw new ParseException("Imposible parsear", 0); | |
} | |
Date toRet = sdf.parse(string, psp); | |
if (psp.getIndex() != string.length()) { | |
throw new ParseException("Imposible parsear", psp.getIndex()); | |
} | |
return toRet; | |
} | |
/** | |
* Provee un formato | |
* | |
* @param format | |
* @return | |
*/ | |
private SimpleDateFormat getFormat(String format) { | |
if (!initialized) { | |
init(); | |
} | |
if (!formats.containsKey(format)) { | |
throw new IllegalArgumentException("Unknow format " + format); | |
} | |
return formats.get(format); | |
} | |
} |
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