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package org.apache.juneau.transforms;

import java.util.*;

import org.apache.juneau.*;
import org.apache.juneau.transform.*;

/**
 * Transforms {@link Calendar Calendars} to {@link Map Maps} of the format <c>{time:long,timeZone:string}</c>.
 */
@SuppressWarnings("rawtypes")
public class CalendarMapSwap extends PojoSwap<Calendar,Map> {

	/**
	 * Converts the specified {@link Calendar} to a {@link Map}.
	 */
	@Override /* PojoSwap */
	public Map swap(BeanSession session, Calendar o) {
		ObjectMap m = new ObjectMap();
		m.put("time", o.getTime().getTime());
		m.put("timeZone", o.getTimeZone().getID());
		return m;
	}

	/**
	 * Converts the specified {@link Map} to a {@link Calendar}.
	 */
	@Override /* PojoSwap */
	@SuppressWarnings("unchecked")
	public Calendar unswap(BeanSession session, Map o, ClassMeta<?> hint) throws Exception {
		ClassMeta<? extends Calendar> tt;
		if (hint == null || ! hint.canCreateNewInstance())
			hint = session.getClassMeta(GregorianCalendar.class);
		tt = (ClassMeta<? extends Calendar>)hint;
		long time = Long.parseLong(o.get("time").toString());
		String timeZone = o.get("timeZone").toString();
		Date d = new Date(time);
		Calendar c = tt.newInstance();
		c.setTime(d);
		c.setTimeZone(TimeZone.getTimeZone(timeZone));
		return c;
	}
}