001package biweekly.util;
002
003import java.text.DecimalFormat;
004import java.text.DecimalFormatSymbols;
005
006/*
007 Copyright (c) 2013-2015, Michael Angstadt
008 All rights reserved.
009
010 Redistribution and use in source and binary forms, with or without
011 modification, are permitted provided that the following conditions are met: 
012
013 1. Redistributions of source code must retain the above copyright notice, this
014 list of conditions and the following disclaimer. 
015 2. Redistributions in binary form must reproduce the above copyright notice,
016 this list of conditions and the following disclaimer in the documentation
017 and/or other materials provided with the distribution. 
018
019 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
026 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030
031/**
032 * Formats floating-point values for iCalendar objects. Notably, this ensures
033 * that a "." is used as decimal separater, no matter the locale.
034 * @author Michael Angstadt
035 */
036@SuppressWarnings("serial")
037public class ICalFloatFormatter extends DecimalFormat {
038        /**
039         * Creates a new formatter with a max of 6 decimals.
040         */
041        public ICalFloatFormatter() {
042                this(6);
043        }
044
045        /**
046         * Creates a new formatter.
047         * @param decimals the max number of decimal places
048         */
049        public ICalFloatFormatter(int decimals) {
050                setMaximumFractionDigits(decimals);
051                if (decimals > 0) {
052                        setMinimumFractionDigits(1);
053                }
054
055                //decimal separator differs by locale (e.g. Germany uses ",")
056                DecimalFormatSymbols symbols = new DecimalFormatSymbols();
057                symbols.setDecimalSeparator('.');
058                symbols.setMinusSign('-');
059                setDecimalFormatSymbols(symbols);
060        }
061}