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66 brianR 1
/*
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 *   Copyright 2011 Brian Rosenberger (Brutex Network)
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 *
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 *   Licensed under the Apache License, Version 2.0 (the "License");
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 *   you may not use this file except in compliance with the License.
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 *   You may obtain a copy of the License at
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 *
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 *       http://www.apache.org/licenses/LICENSE-2.0
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 *
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 *   Unless required by applicable law or agreed to in writing, software
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 *   distributed under the License is distributed on an "AS IS" BASIS,
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 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 *   See the License for the specific language governing permissions and
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 *   limitations under the License.
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 */
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package net.brutex.xservices.ws.impl;
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import java.math.BigInteger;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.TimeZone;
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import javax.jws.WebService;
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import net.brutex.xservices.types.DateFormatType;
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import net.brutex.xservices.types.DateTimeUnits;
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import net.brutex.xservices.util.BrutexNamespaces;
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import net.brutex.xservices.ws.DateService;
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import net.brutex.xservices.ws.XServicesFault;
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/**
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 * @author Brian Rosenberger
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 *
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 */
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@WebService(
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		targetNamespace = BrutexNamespaces.WS_XSERVICES,
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		endpointInterface = "net.brutex.xservices.ws.DateService",
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		serviceName = DateService.SERVICE_NAME
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			)
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public class DateServiceImpl implements DateService {
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	private static String ERR_INVALIDFORMAT = "Invalid format pattern.";
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	private static String ERR_INVALIDTIMEZONE = "Invalid timezone.";
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	public GregorianCalendar getDate(String timezone) throws XServicesFault {
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		if (! isValidTimezone(timezone) ) {
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			String valid_ids = "";
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			String[] tid = TimeZone.getAvailableIDs();
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			for (String s : tid) {
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				valid_ids += s + "\n";
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			}
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			throw new XServicesFault("Please supply a valid timezone id or none. Valid timezones are:\n" + valid_ids,
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					new Exception( ));
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		}
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			if (timezone == null || timezone.length()<1 ) timezone = "GMT0";
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			GregorianCalendar c = new GregorianCalendar(TimeZone.getTimeZone(timezone));
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			return c;
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	}
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	public BigInteger getTimestamp() {
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		Date d = new Date();
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		long l = d.getTime();
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		BigInteger timestamp = new BigInteger(Long.toString(l));
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		return timestamp;
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	}
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	public GregorianCalendar getInTimezone(GregorianCalendar cal,
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			String timezone) throws XServicesFault {
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		if(! isValidTimezone(timezone)) throw new XServicesFault(ERR_INVALIDTIMEZONE);
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		GregorianCalendar c = new GregorianCalendar(TimeZone.getTimeZone(timezone));
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		c.setTimeInMillis(cal.getTimeInMillis());
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		return c;
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	}
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	public String formatDate(GregorianCalendar cal, DateFormatType format) throws XServicesFault {
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		return formatDateAdvanced(cal, format.format());
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	}
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	public String formatDateAdvanced(GregorianCalendar cal, String format)
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			throws XServicesFault {
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		String result= null;
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		try {
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			SimpleDateFormat f = new SimpleDateFormat(format);
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			result = f.format(cal.getTime());
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		} catch (IllegalArgumentException e) {
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			throw new XServicesFault(ERR_INVALIDFORMAT + e.getMessage());
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		}
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		return result;
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	}
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	public GregorianCalendar parseDate(String s, DateFormatType format, String timezone) throws XServicesFault {
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		return parseDateAdvanced(s, format.format(), timezone);
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	}
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	public GregorianCalendar parseDateAdvanced(String s, String format, String timezone) throws XServicesFault {
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		SimpleDateFormat f = null;
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		Date date = null;
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		if(timezone==null | timezone.equals("")) timezone = TimeZone.getDefault().getID();
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		if(! isValidTimezone(timezone)) throw new XServicesFault(ERR_INVALIDTIMEZONE);
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		try {
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			f = new SimpleDateFormat(format);
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			date = f.parse(s);
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		} catch(IllegalArgumentException e) {
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			throw new XServicesFault(ERR_INVALIDFORMAT + e.getMessage());
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		} catch (ParseException e) {
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			throw new XServicesFault("Cannot parse date: "+ e.getMessage());
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		}
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		GregorianCalendar cal = new GregorianCalendar();
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		cal.setTimeZone(TimeZone.getTimeZone(timezone));
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		cal.setTime(date);
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		return cal;
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	}
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	public BigInteger dateTimeDiff(GregorianCalendar fromCal,
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			GregorianCalendar toCal) throws XServicesFault {
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		long diff = toCal.getTimeInMillis() - fromCal.getTimeInMillis();
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		BigInteger d = new BigInteger(String.valueOf(diff), 10);
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		return d;
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	}
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	public BigInteger dateTimeDiff2(GregorianCalendar fromCal,
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			GregorianCalendar toCal, DateTimeUnits unit) throws XServicesFault {
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		BigInteger d = dateTimeDiff(fromCal, toCal);
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		switch (unit) {
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		case SECONDS:
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			d = d.divide(new BigInteger("1000"));
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			break;
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		case MINUTES:
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			d = d.divide(new BigInteger("60000"));
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			break;
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		case HOURS:
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			d = d.divide(new BigInteger("3600000"));
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			break;
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		case DAYS:
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			d = d.divide(new BigInteger("86400000"));
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		}
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		return d;
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	}
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	public GregorianCalendar dateAdd(GregorianCalendar cal, BigInteger value, DateTimeUnits unit)
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			throws XServicesFault {
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		switch (unit) {
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		case SECONDS:
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			cal.add(GregorianCalendar.SECOND, value.intValue());
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			break;
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		case MINUTES:
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			cal.add(GregorianCalendar.MINUTE, value.intValue());
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			break;
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		case HOURS:
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			cal.add(GregorianCalendar.HOUR_OF_DAY, value.intValue());
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			break;
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		case DAYS:
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			cal.add(GregorianCalendar.DAY_OF_MONTH, value.intValue());
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			break;
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		default:
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			cal.add(GregorianCalendar.MILLISECOND, value.intValue());
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		}
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		return cal;
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	}
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	private boolean isValidTimezone(String id) {
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		boolean yes = false;
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		for( String s: TimeZone.getAvailableIDs()) {
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			if(s.equals(id)) {
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				yes = true;
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				break;
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			}
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		}
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		return yes;
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	}
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}