| 1 | /* ============================================================= |
| 2 | * SmallSQL : a free Java DBMS library for the Java(tm) platform |
| 3 | * ============================================================= |
| 4 | * |
| 5 | * (C) Copyright 2004-2006, by Volker Berlin. |
| 6 | * |
| 7 | * Project Info: http://www.smallsql.de/ |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU Lesser General Public License as published by |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 17 | * License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 22 | * USA. |
| 23 | * |
| 24 | * [Java is a trademark or registered trademark of Sun Microsystems, Inc. |
| 25 | * in the United States and other countries.] |
| 26 | * |
| 27 | * --------------- |
| 28 | * Money.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | */ |
| 33 | package smallsql.database; |
| 34 | |
| 35 | import java.math.*; |
| 36 | |
| 37 | public class Money extends Number implements Mutable{ |
| 38 | |
| 39 | long value; |
| 40 | |
| 41 | private Money(){ |
| 42 | } |
| 43 | |
| 44 | public Money(double value){ |
| 45 | this.value = (long)(value * 10000); |
| 46 | } |
| 47 | |
| 48 | public Money(float value){ |
| 49 | this.value = (long)(value * 10000); |
| 50 | } |
| 51 | |
| 52 | public static Money createFromUnscaledValue(long value){ |
| 53 | Money money = new Money(); |
| 54 | money.value = value; |
| 55 | return money; |
| 56 | } |
| 57 | |
| 58 | public static Money createFromUnscaledValue(int value){ |
| 59 | Money money = new Money(); |
| 60 | money.value = value; |
| 61 | return money; |
| 62 | } |
| 63 | |
| 64 | public int intValue() { |
| 65 | return (int)(value / 10000.0); |
| 66 | } |
| 67 | public float floatValue() { |
| 68 | return value / 10000.0F; |
| 69 | } |
| 70 | public double doubleValue() { |
| 71 | return value / 10000.0; |
| 72 | } |
| 73 | public long longValue() { |
| 74 | return (long)(value / 10000.0); |
| 75 | } |
| 76 | |
| 77 | public String toString(){ |
| 78 | StringBuffer buffer = new StringBuffer(); |
| 79 | buffer.append(longValue()).append('.'); |
| 80 | final long v = Math.abs(value); |
| 81 | buffer.append( (char)((v % 10000) / 1000 + '0') ); |
| 82 | buffer.append( (char)((v % 1000) / 100 + '0') ); |
| 83 | buffer.append( (char)((v % 100) / 10 + '0') ); |
| 84 | buffer.append( (char)((v % 10) + '0') ); |
| 85 | |
| 86 | return buffer.toString(); |
| 87 | } |
| 88 | |
| 89 | public boolean equals(Object obj){ |
| 90 | return (obj instanceof Money && ((Money)obj).value == value); |
| 91 | } |
| 92 | |
| 93 | public int hashCode(){ |
| 94 | return (int)(value ^ (value >>> 32)); |
| 95 | } |
| 96 | |
| 97 | public long unscaledValue(){ |
| 98 | return value; |
| 99 | } |
| 100 | |
| 101 | public static long parseMoney( String str ){ |
| 102 | // FIXME ohne Umweg über double implementieren |
| 103 | return Utils.doubleToMoney(Double.parseDouble( str )); |
| 104 | } |
| 105 | |
| 106 | private byte[] toByteArray(){ |
| 107 | byte[] bytes = new byte[8]; |
| 108 | |
| 109 | int offset = 0; |
| 110 | bytes[offset++] = (byte)(value >> 56); |
| 111 | bytes[offset++] = (byte)(value >> 48); |
| 112 | bytes[offset++] = (byte)(value >> 40); |
| 113 | bytes[offset++] = (byte)(value >> 32); |
| 114 | bytes[offset++] = (byte)(value >> 24); |
| 115 | bytes[offset++] = (byte)(value >> 16); |
| 116 | bytes[offset++] = (byte)(value >> 8); |
| 117 | bytes[offset++] = (byte)(value); |
| 118 | return bytes; |
| 119 | } |
| 120 | |
| 121 | public BigDecimal toBigDecimal(){ |
| 122 | if(value == 0) return ZERO; |
| 123 | return new BigDecimal( new BigInteger( toByteArray() ), 4 ); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | public Object getImmutableObject(){ |
| 128 | return toBigDecimal(); |
| 129 | } |
| 130 | |
| 131 | static private final BigDecimal ZERO = new BigDecimal("0.0000"); |
| 132 | } |