001/*
002 * Units of Measurement Reference Implementation
003 * Copyright (c) 2005-2018, Jean-Marie Dautelle, Werner Keil, Otavio Santana.
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.format;
031
032import java.io.IOException;
033import java.math.BigDecimal;
034import java.text.ParsePosition;
035
036import javax.measure.Quantity;
037import javax.measure.Unit;
038import javax.measure.format.ParserException;
039
040import tech.units.indriya.AbstractQuantity;
041import tech.units.indriya.AbstractUnit;
042import tech.units.indriya.ComparableQuantity;
043import tech.units.indriya.quantity.NumberQuantity;
044import tech.units.indriya.quantity.Quantities;
045
046/**
047 * A simple implementation of QuantityFormat
048 */
049@SuppressWarnings("rawtypes")
050public class SimpleQuantityFormat extends AbstractQuantityFormat {
051        /**
052         * Holds the default format instance.
053         */
054        private static final SimpleQuantityFormat DEFAULT = new SimpleQuantityFormat();
055
056        /**
057        *
058        */
059        private static final long serialVersionUID = 2758248665095734058L;
060
061        @Override
062        public Appendable format(Quantity quantity, Appendable dest) throws IOException {
063                Unit unit = quantity.getUnit();
064
065                dest.append(quantity.getValue().toString());
066                if (quantity.getUnit().equals(AbstractUnit.ONE))
067                        return dest;
068                dest.append(' ');
069                return SimpleUnitFormat.getInstance().format(unit, dest);
070        }
071
072        @SuppressWarnings("unchecked")
073        @Override
074        public ComparableQuantity<?> parse(CharSequence csq, ParsePosition cursor) throws ParserException {
075                int startDecimal = cursor.getIndex();
076                while ((startDecimal < csq.length()) && Character.isWhitespace(csq.charAt(startDecimal))) {
077                        startDecimal++;
078                }
079                int endDecimal = startDecimal + 1;
080                while ((endDecimal < csq.length()) && !Character.isWhitespace(csq.charAt(endDecimal))) {
081                        endDecimal++;
082                }
083                BigDecimal decimal = new BigDecimal(csq.subSequence(startDecimal, endDecimal).toString());
084                cursor.setIndex(endDecimal + 1);
085                Unit unit = SimpleUnitFormat.getInstance().parse(csq, cursor);
086                return Quantities.getQuantity(decimal, unit);
087        }
088
089        @SuppressWarnings("unchecked")
090        @Override
091        AbstractQuantity<?> parse(CharSequence csq, int index) throws ParserException {
092                int startDecimal = index; // cursor.getIndex();
093                while ((startDecimal < csq.length()) && Character.isWhitespace(csq.charAt(startDecimal))) {
094                        startDecimal++;
095                }
096                int endDecimal = startDecimal + 1;
097                while ((endDecimal < csq.length()) && !Character.isWhitespace(csq.charAt(endDecimal))) {
098                        endDecimal++;
099                }
100                Double decimal = new Double(csq.subSequence(startDecimal, endDecimal).toString());
101                Unit unit = SimpleUnitFormat.getInstance().parse(csq, index);
102                return NumberQuantity.of(decimal, unit);
103        }
104
105        @Override
106        public ComparableQuantity<?> parse(CharSequence csq) throws ParserException {
107                return parse(csq, new ParsePosition(0));
108        }
109
110        /**
111   * Returns the quantity format for the default locale. The default format assumes the quantity is composed of a decimal number and a {@link Unit}
112   * separated by whitespace(s).
113   *
114   * @return <code>MeasureFormat.getInstance(NumberFormat.getInstance(), UnitFormat.getInstance())</code>
115   */
116  public static SimpleQuantityFormat getInstance() {
117    return DEFAULT;
118  }
119}