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1
5 package org.h2.value;
6
7 import java.io.InputStream  ;
8 import java.io.Reader ;
9 import java.math.BigDecimal ;
10 import java.sql.Date ;
11 import java.sql.PreparedStatement ;
12 import java.sql.SQLException ;
13 import java.sql.Time ;
14 import java.sql.Timestamp ;
15
16 import org.h2.message.Message;
17
18
21 public class ValueNull extends Value {
22
23 public static final ValueNull INSTANCE = new ValueNull();
24 public static final ValueNull DELETED = new ValueNull();
25
26 public static final int PRECISION = 1;
27
28 private ValueNull() {
29 }
30
31 public String getSQL() {
32 return "NULL";
33 }
34
35 public int getType() {
36 return Value.NULL;
37 }
38
39 public String getString() {
40 return null;
41 }
42
43 public Boolean getBoolean() throws SQLException {
44 return null;
45 }
46
47 public Date getDate() throws SQLException {
48 return null;
49 }
50
51 public Time getTime() throws SQLException {
52 return null;
53 }
54
55 public Timestamp getTimestamp() throws SQLException {
56 return null;
57 }
58
59 public byte[] getBytes() throws SQLException {
60 return null;
61 }
62
63 public byte getByte() throws SQLException {
64 return 0;
65 }
66
67 public short getShort() throws SQLException {
68 return 0;
69 }
70
71 public BigDecimal getBigDecimal() throws SQLException {
72 return null;
73 }
74
75 public double getDouble() throws SQLException {
76 return 0.0;
77 }
78
79 public float getFloat() throws SQLException {
80 return 0.0F;
81 }
82
83 public int getInt() throws SQLException {
84 return 0;
85 }
86
87 public long getLong() throws SQLException {
88 return 0;
89 }
90
91 public InputStream getInputStream() throws SQLException {
92 return null;
93 }
94
95 public Reader getReader() throws SQLException {
96 return null;
97 }
98
99 public Value convertTo(int type) throws SQLException {
100 return this;
101 }
102
103 protected int compareSecure(Value v, CompareMode mode) {
104 throw Message.getInternalError("compare null");
105 }
106
107 public long getPrecision() {
108 return PRECISION;
109 }
110
111 public int hashCode() {
112 return 0;
113 }
114
115 public Object getObject() {
116 return null;
117 }
118
119 public void set(PreparedStatement prep, int parameterIndex) throws SQLException {
120 prep.setNull(parameterIndex, DataType.convertTypeToSQLType(Value.NULL));
121 }
122
123
127 public int getDisplaySize() {
128 return "null".length();
129 }
130
131 protected boolean isEqual(Value v) {
132 return v == ValueNull.INSTANCE;
133 }
134
135 }
136 |
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