/**
* Substitute actual data for the parameter markers to simulate parameter substitution in a
* PreparedStatement.
*
* @param sql The SQL containing parameter markers to substitute.
* @param list The parameter descriptors.
* @param connection The current connection.
* @return The modified SQL statement.
*/
static String substituteParameters(String sql, ParamInfo[] list, ConnectionJDBC2 connection)
throws SQLException {
int len = sql.length();
for (int i = 0; i < list.length; i++) {
if (!list[i].isRetVal && !list[i].isSet && !list[i].isOutput) {
throw new SQLException(
Messages.get("error.prepare.paramnotset", Integer.toString(i + 1)), "07000");
}
Object value = list[i].value;
if (value instanceof java.io.InputStream || value instanceof java.io.Reader) {
try {
if (list[i].jdbcType == java.sql.Types.LONGVARCHAR
|| list[i].jdbcType == java.sql.Types.CLOB
|| list[i].jdbcType == java.sql.Types.VARCHAR) {
// TODO: Should improve the character set handling here
value = list[i].getString("US-ASCII");
} else {
value = list[i].getBytes("US-ASCII");
}
// Replace the stream/reader with the String/byte[]
list[i].value = value;
} catch (java.io.IOException e) {
throw new SQLException(Messages.get("error.generic.ioerror", e.getMessage()), "HY000");
}
}
if (value instanceof String) {
len += ((String) value).length() + 5;
} else if (value instanceof byte[]) {
len += ((byte[]) value).length * 2 + 4;
} else {
len += 32; // Default size
}
}
StringBuffer buf = new StringBuffer(len + 16);
int start = 0;
for (int i = 0; i < list.length; i++) {
int pos = list[i].markerPos;
if (pos > 0) {
buf.append(sql.substring(start, list[i].markerPos));
start = pos + 1;
final boolean isUnicode = connection.getTdsVersion() >= Driver.TDS70 && list[i].isUnicode;
Support.embedData(buf, list[i].value, isUnicode, connection);
}
}
if (start < sql.length()) {
buf.append(sql.substring(start));
}
return buf.toString();
}
/**
* Embed the data object as a string literal in the buffer supplied.
*
* @param buf The buffer in which the data will be embedded.
* @param value The data object.
* @param isUnicode Set to <code>true</code> if Unicode strings should be used, else <code>false
* </code>.
* @param connection The {@link ConnectionJDBC2} object.
*/
static void embedData(
StringBuffer buf, Object value, boolean isUnicode, ConnectionJDBC2 connection)
throws SQLException {
buf.append(' ');
if (value == null) {
buf.append("NULL ");
return;
}
if (value instanceof Blob) {
Blob blob = (Blob) value;
value = blob.getBytes(1, (int) blob.length());
} else if (value instanceof Clob) {
Clob clob = (Clob) value;
value = clob.getSubString(1, (int) clob.length());
}
if (value instanceof DateTime) {
buf.append('\'');
buf.append(value);
buf.append('\'');
} else if (value instanceof byte[]) {
byte[] bytes = (byte[]) value;
int len = bytes.length;
if (len >= 0) {
buf.append('0').append('x');
if (len == 0 && connection.getTdsVersion() < Driver.TDS70) {
// Zero length binary values are not allowed
buf.append('0').append('0');
} else {
for (int i = 0; i < len; i++) {
int b1 = bytes[i] & 0xFF;
buf.append(hex[b1 >> 4]);
buf.append(hex[b1 & 0x0F]);
}
}
}
} else if (value instanceof String) {
String tmp = (String) value;
int len = tmp.length();
if (isUnicode) {
buf.append('N');
}
buf.append('\'');
for (int i = 0; i < len; i++) {
char c = tmp.charAt(i);
if (c == '\'') {
buf.append('\'');
}
buf.append(c);
}
buf.append('\'');
} else if (value instanceof java.sql.Date) {
DateTime dt = new DateTime((java.sql.Date) value);
buf.append('\'');
buf.append(dt);
buf.append('\'');
} else if (value instanceof java.sql.Time) {
DateTime dt = new DateTime((java.sql.Time) value);
buf.append('\'');
buf.append(dt);
buf.append('\'');
} else if (value instanceof java.sql.Timestamp) {
DateTime dt = new DateTime((java.sql.Timestamp) value);
buf.append('\'');
buf.append(dt);
buf.append('\'');
} else if (value instanceof Boolean) {
buf.append(((Boolean) value).booleanValue() ? '1' : '0');
} else if (value instanceof BigDecimal) {
//
// Ensure large decimal number does not overflow the
// maximum precision of the server.
// Main problem is with small numbers e.g. BigDecimal(1.0).toString() =
// 0.1000000000000000055511151231....
//
String tmp = value.toString();
int maxlen = connection.getMaxPrecision();
if (tmp.charAt(0) == '-') {
maxlen++;
}
if (tmp.indexOf('.') >= 0) {
maxlen++;
}
if (tmp.length() > maxlen) {
buf.append(tmp.substring(0, maxlen));
} else {
buf.append(tmp);
}
} else {
buf.append(value.toString());
}
buf.append(' ');
}