LSDatePart.java example

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/**
 * Copyright (c) 2015, Lucee Assosication Switzerland. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */
/**
 * Implements the CFML Function datepart
 */
package lucee.runtime.functions.international;

import java.util.Locale;
import java.util.TimeZone;

import lucee.runtime.PageContext;
import lucee.runtime.exp.ExpressionException;
import lucee.runtime.ext.function.Function;
import lucee.runtime.functions.dateTime.Day;
import lucee.runtime.functions.dateTime.Hour;
import lucee.runtime.functions.dateTime.MilliSecond;
import lucee.runtime.functions.dateTime.Minute;
import lucee.runtime.functions.dateTime.Month;
import lucee.runtime.functions.dateTime.Quarter;
import lucee.runtime.functions.dateTime.Second;
import lucee.runtime.functions.dateTime.Week;
import lucee.runtime.functions.dateTime.Year;
import lucee.runtime.type.dt.DateTime;

public final class LSDatePart implements Function {
	
	private static final long serialVersionUID = -4203375459570986511L;

	public static double call(PageContext pc , String datepart, DateTime date) throws ExpressionException {
		return call(pc, datepart, date, null,null);
	}
	public static double call(PageContext pc , String datepart, DateTime date, Locale locale) throws ExpressionException {
		return call(pc, datepart, date, locale, null);
	}
	public static double call(PageContext pc , String datepart, DateTime date, Locale locale, TimeZone tz) throws ExpressionException {
		datepart=datepart.toLowerCase();
		char first=datepart.length()==1?datepart.charAt(0):(char)0;
		
		if(datepart.equals("yyyy")) return Year.call(pc,date,tz);
		else if(datepart.equals("ww")) return Week.call(pc,date,tz);
		else if(first=='w') return LSDayOfWeek.call(pc,date,locale,tz);
		else if(first=='q') return Quarter.call(pc,date,tz);
		else if(first=='m') return Month.call(pc,date,tz);
		else if(first=='y') return LSDayOfYear.call(pc,date,locale,tz);
		else if(first=='d') return Day.call(pc,date,tz);
		else if(first=='h') return Hour.call(pc,date,tz);
		else if(first=='n') return Minute.call(pc,date,tz);
		else if(first=='s') return Second.call(pc,date,tz);
		else if(first=='l') return MilliSecond.call(pc, date,tz);	
		throw new ExpressionException("invalid datepart type ["+datepart+"] for function datePart");
	}
}