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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.engine.Constants;
11 import org.h2.message.Message;
12
13 public class ValueByte extends Value {
14 public static final int PRECISION = 3;
15
16 private byte value;
17
18 private ValueByte(byte value) {
19 this.value = value;
20 }
21
22 public Value add(Value v) throws SQLException {
23 ValueByte other = (ValueByte) v;
24 if(Constants.OVERFLOW_EXCEPTIONS) {
25 return checkRange(value + other.value);
26 }
27 return ValueByte.get((byte) (value + other.value));
28 }
29
30 private ValueByte checkRange(int value) throws SQLException {
31 if(value < Byte.MIN_VALUE || value > Byte.MAX_VALUE) {
32 throw Message.getSQLException(Message.OVERFLOW_FOR_TYPE_1, DataType.getDataType(Value.BYTE).name);
33 } else {
34 return ValueByte.get((byte)value);
35 }
36 }
37
38 public int getSignum() {
39 return value == 0 ? 0 : (value < 0 ? -1 : 1);
40 }
41
42 public Value negate() throws SQLException {
43 if(Constants.OVERFLOW_EXCEPTIONS) {
44 return checkRange(-(int)value);
45 }
46 return ValueByte.get((byte) (-value));
47 }
48
49 public Value subtract(Value v) throws SQLException {
50 ValueByte other = (ValueByte) v;
51 if(Constants.OVERFLOW_EXCEPTIONS) {
52 return checkRange(value - other.value);
53 }
54 return ValueByte.get((byte) (value - other.value));
55 }
56
57 public Value multiply(Value v) throws SQLException {
58 ValueByte other = (ValueByte) v;
59 if(Constants.OVERFLOW_EXCEPTIONS) {
60 return checkRange(value * other.value);
61 }
62 return ValueByte.get((byte) (value * other.value));
63 }
64
65 public Value divide(Value v) throws SQLException {
66 ValueByte other = (ValueByte) v;
67 if (other.value == 0) {
68 throw Message.getSQLException(Message.DIVISION_BY_ZERO_1, getSQL());
69 }
70 return ValueByte.get((byte) (value / other.value));
71 }
72
73 public String getSQL() {
74 return getString();
75 }
76
77 public int getType() {
78 return Value.BYTE;
79 }
80
81 public byte getByte() {
82 return value;
83 }
84
85 protected int compareSecure(Value o, CompareMode mode) {
86 ValueByte v = (ValueByte) o;
87 if (value == v.value) {
88 return 0;
89 }
90 return value > v.value ? 1 : -1;
91 }
92
93 public String getString() {
94 return String.valueOf(value);
95 }
96
97 public long getPrecision() {
98 return PRECISION;
99 }
100
101 public int hashCode() {
102 return value;
103 }
104
105 public Object getObject() {
106 return new Byte (value);
107 }
108
109 public void set(PreparedStatement prep, int parameterIndex) throws SQLException {
110 prep.setByte(parameterIndex, value);
111 }
112
113 public static ValueByte get(byte i) {
114 return (ValueByte) Value.cache(new ValueByte(i));
115 }
116
117
121 public int getDisplaySize() {
122 return PRECISION;
123 }
124
125 protected boolean isEqual(Value v) {
126 return v instanceof ValueByte && value == ((ValueByte)v).value;
127 }
128
129 }
130 |
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