1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
package SQLite.JDBC1;
import java.sql.*;
import java.util.*;
public class JDBCStatement implements java.sql.Statement {
protected JDBCConnection conn;
protected JDBCResultSet rs;
protected int updcnt;
protected int maxrows = 0;
public JDBCStatement(JDBCConnection conn) {
this.conn = conn;
}
public void setFetchSize(int fetchSize) throws SQLException {
if (fetchSize != 1) {
throw new SQLException("fetch size not 1");
}
}
public int getFetchSize() throws SQLException {
return 1;
}
public int getMaxRows() throws SQLException {
return maxrows;
}
public void setMaxRows(int max) throws SQLException {
if (max < 0) {
throw new SQLException("max must be >= 0 (was " + max + ")");
}
maxrows = max;
}
public void setQueryTimeout(int seconds) throws SQLException {
conn.timeout = seconds * 1000;
if (conn.timeout < 0) {
conn.timeout = 120000;
} else if (conn.timeout < 1000) {
conn.timeout = 5000;
}
}
public int getQueryTimeout() throws SQLException {
return conn.timeout / 1000;
}
public ResultSet getResultSet() throws SQLException {
return rs;
}
ResultSet executeQuery(String sql, String args[], boolean updonly)
throws SQLException {
SQLite.TableResult tr = null;
if (rs != null) {
rs.close();
rs = null;
}
updcnt = -1;
if (conn == null || conn.db == null) {
throw new SQLException("stale connection");
}
int busy = 0;
boolean starttrans = !conn.autocommit && !conn.intrans;
while (true) {
try {
if (starttrans) {
conn.db.exec("BEGIN TRANSACTION", null);
conn.intrans = true;
}
if (args == null) {
if (updonly) {
conn.db.exec(sql, null);
} else {
tr = conn.db.get_table(sql, maxrows);
}
} else {
if (updonly) {
conn.db.exec(sql, null, args);
} else {
tr = conn.db.get_table(sql, maxrows, args);
}
}
updcnt = (int) conn.db.changes();
} catch (SQLite.Exception e) {
if (conn.db.is3() &&
conn.db.last_error() == SQLite.Constants.SQLITE_BUSY &&
conn.busy3(conn.db, ++busy)) {
try {
if (starttrans && conn.intrans) {
conn.db.exec("ROLLBACK", null);
conn.intrans = false;
}
} catch (SQLite.Exception ee) {
}
try {
int ms = 20 + busy * 10;
if (ms > 1000) {
ms = 1000;
}
synchronized (this) {
this.wait(ms);
}
} catch (java.lang.Exception eee) {
}
continue;
}
throw new SQLException(e.toString());
}
break;
}
if (!updonly && tr == null) {
throw new SQLException("no result set produced");
}
if (!updonly && tr != null) {
rs = new JDBCResultSet(new TableResultX(tr), this);
}
return rs;
}
public ResultSet executeQuery(String sql) throws SQLException {
return executeQuery(sql, null, false);
}
public boolean execute(String sql) throws SQLException {
return executeQuery(sql) != null;
}
public void cancel() throws SQLException {
if (conn == null || conn.db == null) {
throw new SQLException("stale connection");
}
conn.db.interrupt();
}
public void clearWarnings() throws SQLException {
}
public Connection getConnection() throws SQLException {
return conn;
}
public void addBatch(String sql) throws SQLException {
throw new SQLException("not supported");
}
public int[] executeBatch() throws SQLException {
throw new SQLException("not supported");
}
public void clearBatch() throws SQLException {
throw new SQLException("not supported");
}
public void close() throws SQLException {
conn = null;
}
public int executeUpdate(String sql) throws SQLException {
executeQuery(sql, null, true);
return updcnt;
}
public int getMaxFieldSize() throws SQLException {
return 0;
}
public boolean getMoreResults() throws SQLException {
if (rs != null) {
rs.close();
rs = null;
}
return false;
}
public int getUpdateCount() throws SQLException {
return updcnt;
}
public SQLWarning getWarnings() throws SQLException {
return null;
}
public void setCursorName(String name) throws SQLException {
throw new SQLException("not supported");
}
public void setEscapeProcessing(boolean enable) throws SQLException {
throw new SQLException("not supported");
}
public void setMaxFieldSize(int max) throws SQLException {
throw new SQLException("not supported");
}
}
|
