001/*
002 * Units of Measurement Reference Implementation
003 * Copyright (c) 2005-2020, Units of Measurement project.
004 *
005 * All rights reserved.
006 *
007 * Redistribution and use in source and binary forms, with or without modification,
008 * are permitted provided that the following conditions are met:
009 *
010 * 1. Redistributions of source code must retain the above copyright notice,
011 *    this list of conditions and the following disclaimer.
012 *
013 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions
014 *    and the following disclaimer in the documentation and/or other materials provided with the distribution.
015 *
016 * 3. Neither the name of JSR-385, Indriya nor the names of their contributors may be used to endorse or promote products
017 *    derived from this software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
021 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
023 * FOR 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
026 * AND 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 SOFTWARE,
028 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package tech.units.indriya.internal.format;
031
032import java.text.FieldPosition;
033import java.text.NumberFormat;
034import java.text.ParsePosition;
035
036/**
037 * Wraps a given {@link NumberFormat} and extends it to also support the rational number format. 
038 * <p>
039 * eg. {@code 5รท3}
040 *  
041 * @author Andi Huber
042 *
043 */
044public class RationalNumberFormat extends NumberFormat {
045    
046    private static final long serialVersionUID = 1L;
047    
048    private final NumberFormat numberFormat;
049
050    public static RationalNumberFormat wrap(NumberFormat numberFormat) {
051        return new RationalNumberFormat(numberFormat);
052    }
053    
054    private RationalNumberFormat(NumberFormat numberFormat) {
055        this.numberFormat = numberFormat;
056    }
057
058    @Override
059    public StringBuffer format(double number, StringBuffer toAppendTo, FieldPosition pos) {
060        return numberFormat.format(number, toAppendTo, pos);
061    }
062
063    @Override
064    public StringBuffer format(long number, StringBuffer toAppendTo, FieldPosition pos) {
065        return numberFormat.format(number, toAppendTo, pos);
066    }
067
068    @Override
069    public Number parse(String source, ParsePosition parsePosition) {
070        return new RationalNumberScanner(source, parsePosition, numberFormat).getNumber();
071    }
072
073}