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package ru.olamedia.astronomy;
// package com.bradsbrain.simpleastronomy;
/*
* Copyright 2011 Brad Parks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.text.DateFormat;
import static java.text.DateFormat.SHORT;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
public final class BaseUtils {
public static double exactDaysSince(Calendar myCal, double epoch) {
return JulianDate.makeJulianDateUsingMyModified(myCal) - epoch;
}
public static Calendar getSafeLocalCopy(long millis) {
// safe local copy
Calendar myCal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
myCal.clear();
myCal.setTimeInMillis(millis);
return myCal;
}
public static double adjustTo360Range(double valToAdjust) {
double howMany = Math.floor(valToAdjust / 360);
double adjustedValue = valToAdjust - (howMany * 360);
return adjustedValue;
}
public static double sinDegrees(double angleInDegrees) {
return Math.sin(Math.toRadians(angleInDegrees));
}
public static double cosDegrees(double angleInDegrees) {
return Math.cos(Math.toRadians(angleInDegrees));
}
public static double useLessPrecision(double d, int precision) {
double digits = Math.pow(10, precision);
return Math.round(d * digits) / digits;
}
/**
* Useful date-to-string formatting which I found myself using a lot
*
* @param moonDate
* @return the date in GMT timezone
*/
public static String formatDateForGMT(Date moonDate) {
DateFormat sdf = SimpleDateFormat.getDateInstance(SHORT);
((SimpleDateFormat) sdf).applyPattern("yyyy-MM-dd");
((SimpleDateFormat) sdf).setTimeZone(TimeZone.getTimeZone("GMT"));
return sdf.format(moonDate);
}
/**
* Useful date-to-string formatting which I found myself using a lot
*
* @param moonDate
* @param tz
* the timezone with which to format the date
* @return the date in whatever timezone is default
*/
public static String formatDateAsShortDateLocalTime(Date moonDate,
TimeZone tz) {
DateFormat sdf = SimpleDateFormat.getDateInstance(SHORT);
sdf.setTimeZone(tz);
((SimpleDateFormat) sdf).applyPattern("yyyy-MM-dd");
return sdf.format(moonDate);
}
}
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