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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
|
package SQLite.JDBC2;
import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
import java.util.ArrayList;
public class JDBCStatement implements java.sql.Statement {
protected JDBCConnection conn;
protected JDBCResultSet rs;
protected int updcnt;
protected int maxrows = 0;
private ArrayList batch;
public JDBCStatement(JDBCConnection conn) {
this.conn = conn;
this.updcnt = 0;
this.rs = null;
this.batch = null;
}
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 setFetchDirection(int fetchDirection) throws SQLException {
throw new SQLException("not supported");
}
public int getFetchDirection() throws SQLException {
return ResultSet.FETCH_UNKNOWN;
}
public int getResultSetConcurrency() throws SQLException {
return ResultSet.CONCUR_READ_ONLY;
}
public int getResultSetType() throws SQLException {
return ResultSet.TYPE_SCROLL_INSENSITIVE;
}
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 {
if (batch == null) {
batch = new ArrayList(1);
}
batch.add(sql);
}
public int[] executeBatch() throws SQLException {
if (batch == null) {
return new int[0];
}
int[] ret = new int[batch.size()];
for (int i = 0; i < ret.length; i++) {
ret[i] = EXECUTE_FAILED;
}
int errs = 0;
for (int i = 0; i < ret.length; i++) {
try {
execute(batch.get(i));
ret[i] = updcnt;
} catch (SQLException e) {
++errs;
}
}
if (errs > 0) {
throw new BatchUpdateException("batch failed", ret);
}
return ret;
}
public void clearBatch() throws SQLException {
if (batch != null) {
batch.clear();
batch = null;
}
}
public void close() throws SQLException {
clearBatch();
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");
}
}
|