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1
5 package org.h2.value;
6
7 import java.sql.PreparedStatement  ;
8 import java.sql.SQLException ;
9
10 import org.h2.message.Message;
11
12
15
16 public class ValueDouble extends Value {
17 public static final int PRECISION = 17;
18
19 private double value;
20 private static final double DOUBLE_ZERO = 0.0;
21 private static final double DOUBLE_ONE = 1.0;
22 private static final ValueDouble ZERO = new ValueDouble(DOUBLE_ZERO);
23 private static final ValueDouble ONE = new ValueDouble(DOUBLE_ONE);
24
25 private ValueDouble(double value) {
26 this.value = value;
27 }
28
29 public Value add(Value v) {
30 ValueDouble v2 = (ValueDouble) v;
31 return ValueDouble.get(value + v2.value);
32 }
33
34 public Value subtract(Value v) {
35 ValueDouble v2 = (ValueDouble) v;
36 return ValueDouble.get(value - v2.value);
37 }
38
39 public Value negate() {
40 return ValueDouble.get(-value);
41 }
42
43 public Value multiply(Value v) {
44 ValueDouble v2 = (ValueDouble) v;
45 return ValueDouble.get(value * v2.value);
46 }
47
48 public Value divide(Value v) throws SQLException {
49 ValueDouble v2 = (ValueDouble) v;
50 if (v2.value == 0.0) {
51 throw Message.getSQLException(Message.DIVISION_BY_ZERO_1, getSQL());
52 }
53 return ValueDouble.get(value / v2.value);
54 }
55
56 public String getSQL() {
57 return getString();
58 }
59
60 public int getType() {
61 return Value.DOUBLE;
62 }
63
64 protected int compareSecure(Value o, CompareMode mode) {
65 ValueDouble v = (ValueDouble) o;
66 if (value == v.value) {
67 return 0;
68 }
69 return value > v.value ? 1 : -1;
70 }
71
72 public int getSignum() {
73 return value == 0 ? 0 : (value < 0 ? -1 : 1);
74 }
75
76 public double getDouble() {
77 return value;
78 }
79
80 public String getString() {
81 return String.valueOf(value);
82 }
83
84 public long getPrecision() {
85 return PRECISION;
86 }
87
88 public int getScale() {
89 return 0;
91 }
92
93 public int hashCode() {
94 long hash = Double.doubleToLongBits(value);
95 return (int) (hash ^ (hash >> 32));
96 }
97
98 public Object getObject() {
99 return new Double (value);
100 }
101
102 public void set(PreparedStatement prep, int parameterIndex) throws SQLException {
103 prep.setDouble(parameterIndex, value);
104 }
105
106 public static ValueDouble get(double d) {
107 if (DOUBLE_ZERO == d) {
108 return ZERO;
109 } else if (DOUBLE_ONE == d) {
110 return ONE;
111 }
112 return (ValueDouble) Value.cache(new ValueDouble(d));
113 }
114
115
119 public int getDisplaySize() {
120 return PRECISION + 2;
121 }
122
123 protected boolean isEqual(Value v) {
124 return v instanceof ValueDouble && value == ((ValueDouble)v).value;
125 }
126
127 }
128 |
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