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AvailableTimeZonesBean.java
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AvailableTimeZonesBean.java
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package org.jboss.seam.international.examples.timeanddate.worldclock;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.enterprise.inject.Produces;
import javax.faces.context.FacesContext;
import javax.inject.Inject;
import javax.inject.Named;
import org.jboss.seam.logging.Logger;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
/**
* AvailableTimeZonesBean is the bean responsable to keep and produce a list of dateTimes extracted from
* the available TimeZones produced by seam-international.
*
* @author <a href="http://community.jboss.org/people/spinner)">jose.freitas</a>
*/
@Singleton
@Startup
public class AvailableTimeZonesBean {
public final static String STANDARD_DATE_TIME_FORMAT = "HH:mm:ss MM/dd/yyyy";
@Inject
List<DateTimeZone> timeZones;
@Inject
DateTimeZone applicationTimeZone;
@Inject
private Logger log;
@PostConstruct
public void startupTimeAroundTheWorld() {
log.info("This bean started on: ");
for (Iterator<DateTimeZone> iterator = timeZones.iterator(); iterator.hasNext();) {
DateTimeZone dtz = iterator.next();
DateTimeFormatter fmt = DateTimeFormat.forPattern(STANDARD_DATE_TIME_FORMAT);
DateTime dt = new DateTime().withZone(dtz);
log.info(dtz.getID() + " - " + fmt.print(dt));
}
}
@Produces
@Named("availableDateTimesFromTimeZones")
public List<DateTime> getAvailableTimeZones() {
List<DateTimeZone> filteredTimeZones = filterTimeZones();
List<DateTime> list = new LinkedList<DateTime>();
for (Iterator<DateTimeZone> iterator = filteredTimeZones.iterator(); iterator.hasNext();) {
DateTimeZone dtz = iterator.next();
DateTime dateTime = new DateTime().withZone(dtz);
list.add(dateTime);
}
return list;
}
private List<DateTimeZone> filterTimeZones() {
String region = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("region");
if (region != null) {
List<DateTimeZone> filteredTimeZones = new LinkedList<DateTimeZone>();
for (Iterator<DateTimeZone> iterator = timeZones.iterator(); iterator.hasNext();) {
DateTimeZone dtz = iterator.next();
if (dtz.getID().startsWith(region))
filteredTimeZones.add(dtz);
}
return filteredTimeZones;
}
return timeZones;
}
}