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Microsoft JDBC Driver for SQL Server.
/*
* Microsoft JDBC Driver for SQL Server Copyright(c) Microsoft Corporation All rights reserved. This program is made
* available under the terms of the MIT License. See the LICENSE file in the project root for more information.
*/
package com.microsoft.sqlserver.jdbc;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.text.DecimalFormat;
import java.text.MessageFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Properties;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.Logger;
/**
* Various driver utilities.
*
*/
final class Util {
final static String SYSTEM_SPEC_VERSION = System.getProperty("java.specification.version");
final static char[] hexChars = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
final static String WSIDNotAvailable = ""; // default string when WSID is not available
final static String ACTIVITY_ID_TRACE_PROPERTY = "com.microsoft.sqlserver.jdbc.traceactivity";
// The JRE is identified by the string below so that the driver can make
// any vendor or version specific decisions
static final String SYSTEM_JRE = System.getProperty("java.vendor") + " " + System.getProperty("java.version");
static boolean isIBM() {
return SYSTEM_JRE.startsWith("IBM");
}
static String getJVMArchOnWindows() {
return System.getProperty("os.arch").contains("64") ? "x64" : "x86";
}
static final boolean isCharType(int jdbcType) {
switch (jdbcType) {
case java.sql.Types.CHAR:
case java.sql.Types.NCHAR:
case java.sql.Types.VARCHAR:
case java.sql.Types.NVARCHAR:
case java.sql.Types.LONGVARCHAR:
case java.sql.Types.LONGNVARCHAR:
return true;
default:
return false;
}
}
static final Boolean isCharType(SSType ssType) {
switch (ssType) {
case CHAR:
case NCHAR:
case VARCHAR:
case NVARCHAR:
case VARCHARMAX:
case NVARCHARMAX:
return true;
default:
return false;
}
}
static final Boolean isBinaryType(SSType ssType) {
switch (ssType) {
case BINARY:
case VARBINARY:
case VARBINARYMAX:
case IMAGE:
return true;
default:
return false;
}
}
static final Boolean isBinaryType(int jdbcType) {
switch (jdbcType) {
case java.sql.Types.BINARY:
case java.sql.Types.VARBINARY:
case java.sql.Types.LONGVARBINARY:
return true;
default:
return false;
}
}
/**
* Read a short int from a byte stream
*
* @param data
* the databytes
* @param nOffset
* offset to read from
* @return the value
*/
/* L0 */ static short readShort(byte data[], int nOffset) {
return (short) ((data[nOffset] & 0xff) | ((data[nOffset + 1] & 0xff) << 8));
}
/**
* Read an unsigned short int (16 bits) from a byte stream
*
* @param data
* the databytes
* @param nOffset
* offset to read from
* @return the value
*/
/* L0 */ static int readUnsignedShort(byte data[], int nOffset) {
return ((data[nOffset] & 0xff) | ((data[nOffset + 1] & 0xff) << 8));
}
static int readUnsignedShortBigEndian(byte data[], int nOffset) {
return ((data[nOffset] & 0xFF) << 8) | (data[nOffset + 1] & 0xFF);
}
static void writeShort(short value, byte valueBytes[], int offset) {
valueBytes[offset + 0] = (byte) ((value >> 0) & 0xFF);
valueBytes[offset + 1] = (byte) ((value >> 8) & 0xFF);
}
static void writeShortBigEndian(short value, byte valueBytes[], int offset) {
valueBytes[offset + 0] = (byte) ((value >> 8) & 0xFF);
valueBytes[offset + 1] = (byte) ((value >> 0) & 0xFF);
}
/**
* Read an int from a byte stream
*
* @param data
* the databytes
* @param nOffset
* offset to read from
* @return the value
*/
/* L0 */ static int readInt(byte data[], int nOffset) {
int b1 = ((int) data[nOffset + 0] & 0xff);
int b2 = ((int) data[nOffset + 1] & 0xff) << 8;
int b3 = ((int) data[nOffset + 2] & 0xff) << 16;
int b4 = ((int) data[nOffset + 3] & 0xff) << 24;
return b4 | b3 | b2 | b1;
}
static int readIntBigEndian(byte data[], int nOffset) {
return ((data[nOffset + 3] & 0xFF) << 0) | ((data[nOffset + 2] & 0xFF) << 8)
| ((data[nOffset + 1] & 0xFF) << 16) | ((data[nOffset + 0] & 0xFF) << 24);
}
static void writeInt(int value, byte valueBytes[], int offset) {
valueBytes[offset + 0] = (byte) ((value >> 0) & 0xFF);
valueBytes[offset + 1] = (byte) ((value >> 8) & 0xFF);
valueBytes[offset + 2] = (byte) ((value >> 16) & 0xFF);
valueBytes[offset + 3] = (byte) ((value >> 24) & 0xFF);
}
static void writeIntBigEndian(int value, byte valueBytes[], int offset) {
valueBytes[offset + 0] = (byte) ((value >> 24) & 0xFF);
valueBytes[offset + 1] = (byte) ((value >> 16) & 0xFF);
valueBytes[offset + 2] = (byte) ((value >> 8) & 0xFF);
valueBytes[offset + 3] = (byte) ((value >> 0) & 0xFF);
}
static void writeLongBigEndian(long value, byte valueBytes[], int offset) {
valueBytes[offset + 0] = (byte) ((value >> 56) & 0xFF);
valueBytes[offset + 1] = (byte) ((value >> 48) & 0xFF);
valueBytes[offset + 2] = (byte) ((value >> 40) & 0xFF);
valueBytes[offset + 3] = (byte) ((value >> 32) & 0xFF);
valueBytes[offset + 4] = (byte) ((value >> 24) & 0xFF);
valueBytes[offset + 5] = (byte) ((value >> 16) & 0xFF);
valueBytes[offset + 6] = (byte) ((value >> 8) & 0xFF);
valueBytes[offset + 7] = (byte) ((value >> 0) & 0xFF);
}
static BigDecimal readBigDecimal(byte valueBytes[], int valueLength, int scale) {
int sign = (0 == valueBytes[0]) ? -1 : 1;
byte[] magnitude = new byte[valueLength - 1];
for (int i = 1; i <= magnitude.length; i++)
magnitude[magnitude.length - i] = valueBytes[i];
return new BigDecimal(new BigInteger(sign, magnitude), scale);
}
/**
* Reads a long value from byte array.
*
* @param data
* the byte array.
* @param nOffset
* the offset into byte array to start reading.
* @return long value as read from bytes.
*/
/* L0 */static long readLong(byte data[], int nOffset) {
return ((long) (data[nOffset + 7] & 0xff) << 56) | ((long) (data[nOffset + 6] & 0xff) << 48)
| ((long) (data[nOffset + 5] & 0xff) << 40) | ((long) (data[nOffset + 4] & 0xff) << 32)
| ((long) (data[nOffset + 3] & 0xff) << 24) | ((long) (data[nOffset + 2] & 0xff) << 16)
| ((long) (data[nOffset + 1] & 0xff) << 8) | ((long) (data[nOffset] & 0xff));
}
/**
* Writes a long to byte array.
*
* @param value
* long value to write.
* @param valueBytes
* the byte array.
* @param offset
* the offset inside byte array.
*/
static void writeLong(long value, byte valueBytes[], int offset) {
valueBytes[offset++] = (byte) ((value) & 0xFF);
valueBytes[offset++] = (byte) ((value >> 8) & 0xFF);
valueBytes[offset++] = (byte) ((value >> 16) & 0xFF);
valueBytes[offset++] = (byte) ((value >> 24) & 0xFF);
valueBytes[offset++] = (byte) ((value >> 32) & 0xFF);
valueBytes[offset++] = (byte) ((value >> 40) & 0xFF);
valueBytes[offset++] = (byte) ((value >> 48) & 0xFF);
valueBytes[offset] = (byte) ((value >> 56) & 0xFF);
}
/**
* Parse a JDBC URL into a set of properties.
*
* @param url
* the JDBC URL
* @param logger
* @return the properties
* @throws SQLServerException
*/
/* L0 */ static Properties parseUrl(String url, Logger logger) throws SQLServerException {
Properties p = new Properties();
String tmpUrl = url;
String sPrefix = "jdbc:sqlserver://";
StringBuilder result = new StringBuilder();
String name = "";
String value = "";
if (!tmpUrl.startsWith(sPrefix))
return null;
tmpUrl = tmpUrl.substring(sPrefix.length());
int i;
// Simple finite state machine.
// always look at one char at a time
final int inStart = 0;
final int inServerName = 1;
final int inPort = 2;
final int inInstanceName = 3;
final int inEscapedValueStart = 4;
final int inEscapedValueEnd = 5;
final int inValue = 6;
final int inName = 7;
int state = inStart;
char ch;
i = 0;
while (i < tmpUrl.length()) {
ch = tmpUrl.charAt(i);
switch (state) {
case inStart: {
if (ch == ';') {
// done immediately
state = inName;
} else {
result.append(ch);
state = inServerName;
}
break;
}
case inServerName: {
if (ch == ';' || ch == ':' || ch == '\\') {
// non escaped trim the string
String property = result.toString().trim();
if (property.contains("=")) {
MessageFormat form = new MessageFormat(SQLServerException.getErrString("R_errorServerName"));
Object[] msgArgs = {property};
SQLServerException.makeFromDriverError(null, null,
form.format(msgArgs), null, true);
}
if (property.length() > 0) {
p.put(SQLServerDriverStringProperty.SERVER_NAME.toString(), property);
if (logger.isLoggable(Level.FINE)) {
logger.fine("Property:serverName " + "Value:" + property);
}
}
result.setLength(0);
if (ch == ';')
state = inName;
else if (ch == ':')
state = inPort;
else
state = inInstanceName;
} else {
result.append(ch);
// same state
}
break;
}
case inPort: {
if (ch == ';') {
String property = result.toString().trim();
if (logger.isLoggable(Level.FINE)) {
logger.fine("Property:portNumber " + "Value:" + property);
}
p.put(SQLServerDriverIntProperty.PORT_NUMBER.toString(), property);
result.setLength(0);
state = inName;
} else {
result.append(ch);
// same state
}
break;
}
case inInstanceName: {
if (ch == ';' || ch == ':') {
// non escaped trim the string
String property = result.toString().trim();
if (logger.isLoggable(Level.FINE)) {
logger.fine("Property:instanceName " + "Value:" + property);
}
p.put(SQLServerDriverStringProperty.INSTANCE_NAME.toString(), property.toLowerCase(Locale.US));
result.setLength(0);
if (ch == ';')
state = inName;
else
state = inPort;
} else {
result.append(ch);
// same state
}
break;
}
case inName: {
if (ch == '=') {
// name is never escaped!
name = name.trim();
if (name.length() <= 0) {
SQLServerException.makeFromDriverError(null, null,
SQLServerException.getErrString("R_errorConnectionString"), null, true);
}
state = inValue;
} else if (ch == ';') {
name = name.trim();
if (name.length() > 0) {
SQLServerException.makeFromDriverError(null, null,
SQLServerException.getErrString("R_errorConnectionString"), null, true);
}
// same state
} else {
StringBuilder builder = new StringBuilder();
builder.append(name);
builder.append(ch);
name = builder.toString();
// same state
}
break;
}
case inValue: {
if (ch == ';') {
// simple value trim
value = value.trim();
name = SQLServerDriver.getNormalizedPropertyName(name, logger);
if (null != name) {
if (logger.isLoggable(Level.FINE)) {
if (!name.equals(SQLServerDriverStringProperty.USER.toString())) {
if (!name.toLowerCase(Locale.ENGLISH).contains("password")
&& !name.toLowerCase(Locale.ENGLISH).contains("keystoresecret")) {
logger.fine("Property:" + name + " Value:" + value);
} else {
logger.fine("Property:" + name);
}
}
}
p.put(name, value);
}
name = "";
value = "";
state = inName;
} else if (ch == '{') {
state = inEscapedValueStart;
value = value.trim();
if (value.length() > 0) {
SQLServerException.makeFromDriverError(null, null,
SQLServerException.getErrString("R_errorConnectionString"), null, true);
}
} else {
StringBuilder builder = new StringBuilder();
builder.append(value);
builder.append(ch);
value = builder.toString();
// same state
}
break;
}
case inEscapedValueStart: {
/*
* check for escaped }. when we see a }, first check to see if this is before the end of the string
* to avoid index out of range exception then check if the character immediately after is also a }.
* if it is, then we have a }}, which is not the closing of the escaped state.
*/
if (ch == '}' && i + 1 < tmpUrl.length() && tmpUrl.charAt(i + 1) == '}') {
StringBuilder builder = new StringBuilder();
builder.append(value);
builder.append(ch);
value = builder.toString();
i++; // escaped }} into a }, so increment the counter once more
// same state
} else {
if (ch == '}') {
// no trimming use the value as it is.
name = SQLServerDriver.getNormalizedPropertyName(name, logger);
if (null != name) {
if (logger.isLoggable(Level.FINE)) {
if (!name.equals(SQLServerDriverStringProperty.USER.toString())
&& !name.equals(SQLServerDriverStringProperty.PASSWORD.toString()))
logger.fine("Property:" + name + " Value:" + value);
}
p.put(name, value);
}
name = "";
value = "";
// to eat the spaces until the ; potentially we could do without the state but
// it would not be clean
state = inEscapedValueEnd;
} else {
StringBuilder builder = new StringBuilder();
builder.append(value);
builder.append(ch);
value = builder.toString();
// same state
}
}
break;
}
case inEscapedValueEnd: {
if (ch == ';') // eat space chars till ; anything else is an error
{
state = inName;
} else if (ch != ' ') {
// error if the chars are not space
SQLServerException.makeFromDriverError(null, null,
SQLServerException.getErrString("R_errorConnectionString"), null, true);
}
break;
}
default:
assert false : "parseURL: Invalid state " + state;
}
i++;
}
// Exit
switch (state) {
case inServerName:
String property = result.toString().trim();
if (property.length() > 0) {
if (logger.isLoggable(Level.FINE)) {
logger.fine("Property:serverName " + "Value:" + property);
}
p.put(SQLServerDriverStringProperty.SERVER_NAME.toString(), property);
}
break;
case inPort:
property = result.toString().trim();
if (logger.isLoggable(Level.FINE)) {
logger.fine("Property:portNumber " + "Value:" + property);
}
p.put(SQLServerDriverIntProperty.PORT_NUMBER.toString(), property);
break;
case inInstanceName:
property = result.toString().trim();
if (logger.isLoggable(Level.FINE)) {
logger.fine("Property:instanceName " + "Value:" + property);
}
p.put(SQLServerDriverStringProperty.INSTANCE_NAME.toString(), property);
break;
case inValue:
// simple value trim
value = value.trim();
name = SQLServerDriver.getNormalizedPropertyName(name, logger);
if (null != name) {
if (logger.isLoggable(Level.FINE)) {
if (!name.equals(SQLServerDriverStringProperty.USER.toString())
&& !name.equals(SQLServerDriverStringProperty.PASSWORD.toString())
&& !name.equals(SQLServerDriverStringProperty.KEY_STORE_SECRET.toString()))
logger.fine("Property:" + name + " Value:" + value);
}
p.put(name, value);
}
break;
case inEscapedValueEnd:
case inStart:
// do nothing!
break;
case inName: {
name = name.trim();
if (name.length() > 0) {
SQLServerException.makeFromDriverError(null, null,
SQLServerException.getErrString("R_errorConnectionString"), null, true);
}
break;
}
default:
SQLServerException.makeFromDriverError(null, null,
SQLServerException.getErrString("R_errorConnectionString"), null, true);
}
return p;
}
/**
* Accepts a SQL identifier (such as a column name or table name) and escapes the identifier using SQL Server
* bracket escaping rules. Assumes that the incoming identifier is unescaped.
*
* @inID input identifier to escape.
* @return the escaped value.
*/
static String escapeSQLId(String inID) {
// SQL bracket escaping rules.
// Given yields -> []
// Where is first escaped to replace all
// instances of "]" with "]]".
// For example, column name "abc" -> "[abc]"
// For example, column name "]" -> "[]]]"
// For example, column name "]ab]cd" -> "[]]ab]]cd]"
char ch;
// Add 2 extra chars for open and closing brackets.
StringBuilder outID = new StringBuilder(inID.length() + 2);
outID.append('[');
for (int i = 0; i < inID.length(); i++) {
ch = inID.charAt(i);
if (']' == ch)
outID.append("]]");
else
outID.append(ch);
}
outID.append(']');
return outID.toString();
}
/**
* Checks if duplicate columns exists, in O(n) time.
*
* @param columnName
* the name of the column
* @throws SQLServerException
* when a duplicate column exists
*/
static void checkDuplicateColumnName(String columnName, Set columnNames) throws SQLServerException {
// columnList.add will return false if the same column name already exists
if (!columnNames.add(columnName)) {
MessageFormat form = new MessageFormat(SQLServerException.getErrString("R_TVPDuplicateColumnName"));
Object[] msgArgs = {columnName};
throw new SQLServerException(null, form.format(msgArgs), null, 0, false);
}
}
/**
* Reads a UNICODE string from byte buffer at offset (up to byteLength).
*
* @param b
* the buffer containing UNICODE bytes.
* @param offset
* - the offset into b where the UNICODE string starts.
* @param byteLength
* - the length in bytes of the UNICODE string.
* @param conn
* - the SQLServerConnection object.
* @return new String with UNICODE data inside.
*/
static String readUnicodeString(byte[] b, int offset, int byteLength,
SQLServerConnection conn) throws SQLServerException {
try {
return new String(b, offset, byteLength, Encoding.UNICODE.charset());
} catch (IndexOutOfBoundsException ex) {
String txtMsg = SQLServerException
.checkAndAppendClientConnId(SQLServerException.getErrString("R_stringReadError"), conn);
MessageFormat form = new MessageFormat(txtMsg);
Object[] msgArgs = {offset};
// Re-throw SQLServerException if conversion fails.
throw new SQLServerException(form.format(msgArgs), null, 0, ex);
}
}
// NOTE: This is for display purposes ONLY. NOT TO BE USED for data conversion.
/**
* Converts byte array to a string representation of hex bytes for display purposes.
*
* @param b
* the source buffer.
* @return "hexized" string representation of bytes.
*/
static String byteToHexDisplayString(byte[] b) {
if (null == b)
return "(null)";
int hexVal;
StringBuilder sb = new StringBuilder(b.length * 2 + 2);
sb.append("0x");
for (byte aB : b) {
hexVal = aB & 0xFF;
sb.append(hexChars[(hexVal & 0xF0) >> 4]);
sb.append(hexChars[(hexVal & 0x0F)]);
}
return sb.toString();
}
/**
* Converts byte array to a string representation of hex bytes.
*
* @param b
* the source buffer.
* @return "hexized" string representation of bytes.
*/
static String bytesToHexString(byte[] b, int length) {
StringBuilder sb = new StringBuilder(length * 2);
for (int i = 0; i < length; i++) {
int hexVal = b[i] & 0xFF;
sb.append(hexChars[(hexVal & 0xF0) >> 4]);
sb.append(hexChars[(hexVal & 0x0F)]);
}
return sb.toString();
}
/**
* Looks up local hostname of client machine.
*
* @exception UnknownHostException
* if local hostname is not found.
* @return hostname string or ip of host if hostname cannot be resolved. If neither hostname or ip found returns ""
* per spec.
*/
static String lookupHostName() {
try {
InetAddress localAddress = InetAddress.getLocalHost();
if (null != localAddress) {
String value = localAddress.getHostName();
if (null != value && value.length() > 0)
return value;
value = localAddress.getHostAddress();
if (null != value && value.length() > 0)
return value;
}
} catch (UnknownHostException e) {
return WSIDNotAvailable;
}
// If hostname not found, return standard "" string.
return WSIDNotAvailable;
}
static final byte[] asGuidByteArray(UUID aId) {
long msb = aId.getMostSignificantBits();
long lsb = aId.getLeastSignificantBits();
byte[] buffer = new byte[16];
Util.writeLongBigEndian(msb, buffer, 0);
Util.writeLongBigEndian(lsb, buffer, 8);
// For the first three fields, UUID uses network byte order,
// Guid uses native byte order. So we need to reverse
// the first three fields before sending to server.
byte tmpByte;
// Reverse the first 4 bytes
tmpByte = buffer[0];
buffer[0] = buffer[3];
buffer[3] = tmpByte;
tmpByte = buffer[1];
buffer[1] = buffer[2];
buffer[2] = tmpByte;
// Reverse the 5th and the 6th
tmpByte = buffer[4];
buffer[4] = buffer[5];
buffer[5] = tmpByte;
// Reverse the 7th and the 8th
tmpByte = buffer[6];
buffer[6] = buffer[7];
buffer[7] = tmpByte;
return buffer;
}
static final UUID readGUIDtoUUID(byte[] inputGUID) throws SQLServerException {
if (inputGUID.length != 16) {
throw new SQLServerException("guid length must be 16", null);
}
// For the first three fields, UUID uses network byte order,
// Guid uses native byte order. So we need to reverse
// the first three fields before creating a UUID.
byte tmpByte;
// Reverse the first 4 bytes
tmpByte = inputGUID[0];
inputGUID[0] = inputGUID[3];
inputGUID[3] = tmpByte;
tmpByte = inputGUID[1];
inputGUID[1] = inputGUID[2];
inputGUID[2] = tmpByte;
// Reverse the 5th and the 6th
tmpByte = inputGUID[4];
inputGUID[4] = inputGUID[5];
inputGUID[5] = tmpByte;
// Reverse the 7th and the 8th
tmpByte = inputGUID[6];
inputGUID[6] = inputGUID[7];
inputGUID[7] = tmpByte;
long msb = 0L;
for (int i = 0; i < 8; i++) {
msb = msb << 8 | ((long) inputGUID[i] & 0xFFL);
}
long lsb = 0L;
for (int i = 8; i < 16; i++) {
lsb = lsb << 8 | ((long) inputGUID[i] & 0xFFL);
}
return new UUID(msb, lsb);
}
static final String readGUID(byte[] inputGUID) throws SQLServerException {
String guidTemplate = "NNNNNNNN-NNNN-NNNN-NNNN-NNNNNNNNNNNN";
byte guid[] = inputGUID;
StringBuilder sb = new StringBuilder(guidTemplate.length());
for (int i = 0; i < 4; i++) {
sb.append(Util.hexChars[(guid[3 - i] & 0xF0) >> 4]);
sb.append(Util.hexChars[guid[3 - i] & 0x0F]);
}
sb.append('-');
for (int i = 0; i < 2; i++) {
sb.append(Util.hexChars[(guid[5 - i] & 0xF0) >> 4]);
sb.append(Util.hexChars[guid[5 - i] & 0x0F]);
}
sb.append('-');
for (int i = 0; i < 2; i++) {
sb.append(Util.hexChars[(guid[7 - i] & 0xF0) >> 4]);
sb.append(Util.hexChars[guid[7 - i] & 0x0F]);
}
sb.append('-');
for (int i = 0; i < 2; i++) {
sb.append(Util.hexChars[(guid[8 + i] & 0xF0) >> 4]);
sb.append(Util.hexChars[guid[8 + i] & 0x0F]);
}
sb.append('-');
for (int i = 0; i < 6; i++) {
sb.append(Util.hexChars[(guid[10 + i] & 0xF0) >> 4]);
sb.append(Util.hexChars[guid[10 + i] & 0x0F]);
}
return sb.toString();
}
static boolean isActivityTraceOn() {
LogManager lm = LogManager.getLogManager();
String activityTrace = lm.getProperty(ACTIVITY_ID_TRACE_PROPERTY);
return ("on".equalsIgnoreCase(activityTrace));
}
/**
* Determines if a column value should be transparently decrypted (based on SQLServerStatement and the connection
* string settings).
*
* @return true if the value should be transparently decrypted, false otherwise.
*/
static boolean shouldHonorAEForRead(SQLServerStatementColumnEncryptionSetting stmtColumnEncryptionSetting,
SQLServerConnection connection) {
// Command leve setting trumps all
switch (stmtColumnEncryptionSetting) {
case Disabled:
return false;
case Enabled:
case ResultSetOnly:
return true;
default:
// Check connection level setting!
assert SQLServerStatementColumnEncryptionSetting.UseConnectionSetting == stmtColumnEncryptionSetting : "Unexpected value for command level override";
return (connection != null && connection.isColumnEncryptionSettingEnabled());
}
}
/**
* Determines if parameters should be transparently encrypted (based on SQLServerStatement and the connection string
* settings).
*
* @return true if the value should be transparently encrypted, false otherwise.
*/
static boolean shouldHonorAEForParameters(SQLServerStatementColumnEncryptionSetting stmtColumnEncryptionSetting,
SQLServerConnection connection) {
// Command leve setting trumps all
switch (stmtColumnEncryptionSetting) {
case Disabled:
case ResultSetOnly:
return false;
case Enabled:
return true;
default:
// Check connection level setting!
assert SQLServerStatementColumnEncryptionSetting.UseConnectionSetting == stmtColumnEncryptionSetting : "Unexpected value for command level override";
return (connection != null && connection.isColumnEncryptionSettingEnabled());
}
}
static void validateMoneyRange(BigDecimal bd, JDBCType jdbcType) throws SQLServerException {
if (null == bd)
return;
switch (jdbcType) {
case MONEY:
if ((1 != bd.compareTo(SSType.MAX_VALUE_MONEY)) && (-1 != bd.compareTo(SSType.MIN_VALUE_MONEY))) {
return;
}
break;
case SMALLMONEY:
if ((1 != bd.compareTo(SSType.MAX_VALUE_SMALLMONEY))
&& (-1 != bd.compareTo(SSType.MIN_VALUE_SMALLMONEY))) {
return;
}
break;
default:
break;
}
MessageFormat form = new MessageFormat(SQLServerException.getErrString("R_valueOutOfRange"));
Object[] msgArgs = {jdbcType};
throw new SQLServerException(form.format(msgArgs), null);
}
static int getValueLengthBaseOnJavaType(Object value, JavaType javaType, Integer precision, Integer scale,
JDBCType jdbcType) throws SQLServerException {
switch (javaType) {
// when the value of setObject() is null, the javaType stays
// as OBJECT. We need to get the javaType base on jdbcType
case OBJECT:
switch (jdbcType) {
case DECIMAL:
case NUMERIC:
javaType = JavaType.BIGDECIMAL;
break;
case TIME:
javaType = JavaType.TIME;
break;
case TIMESTAMP:
javaType = JavaType.TIMESTAMP;
break;
case DATETIMEOFFSET:
javaType = JavaType.DATETIMEOFFSET;
break;
default:
break;
}
break;
default:
break;
}
switch (javaType) {
case STRING:
if (JDBCType.GUID == jdbcType) {
String guidTemplate = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX";
return ((null == value) ? 0 : guidTemplate.length());
} else if (JDBCType.TIMESTAMP == jdbcType || JDBCType.TIME == jdbcType
|| JDBCType.DATETIMEOFFSET == jdbcType) {
return ((null == scale) ? TDS.MAX_FRACTIONAL_SECONDS_SCALE : scale);
} else if (JDBCType.BINARY == jdbcType || JDBCType.VARBINARY == jdbcType) {
return ((null == value) ? 0 : (ParameterUtils.HexToBin((String) value).length));
} else if (JDBCType.GEOMETRY == jdbcType) {
return ((null == value) ? 0 : ((Geometry) value).serialize().length);
} else if (JDBCType.GEOGRAPHY == jdbcType) {
return ((null == value) ? 0 : ((Geography) value).serialize().length);
} else {
return ((null == value) ? 0 : ((String) value).length());
}
case BYTEARRAY:
return ((null == value) ? 0 : ((byte[]) value).length);
case BIGDECIMAL:
int length;
if (null == precision) {
if (null == value) {
length = 0;
} else {
if (0 == ((BigDecimal) value).intValue()) {
String s = "" + value;
s = s.replaceAll("\\-", "");
if (s.startsWith("0.")) {
// remove the leading zero, eg., for 0.32, the precision should be 2 and not 3
s = s.replaceAll("0\\.", "");
} else {
s = s.replaceAll("\\.", "");
}
length = s.length();
}
// if the value is in scientific notation format
else if (("" + value).contains("E")) {
DecimalFormat dform = new DecimalFormat("###.#####");
String s = dform.format(value);
s = s.replaceAll("\\.", "");
s = s.replaceAll("\\-", "");
length = s.length();
} else {
length = ((BigDecimal) value).precision();
}
}
} else {
length = precision;
}
return length;
case TIMESTAMP:
case TIME:
case DATETIMEOFFSET:
return ((null == scale) ? TDS.MAX_FRACTIONAL_SECONDS_SCALE : scale);
case CLOB:
return ((null == value) ? 0 : (DataTypes.NTEXT_MAX_CHARS * 2));
case NCLOB:
case READER:
return ((null == value) ? 0 : DataTypes.NTEXT_MAX_CHARS);
default:
return 0;
}
}
// If the access token is expiring within next 10 minutes, lets just re-create a token for this connection attempt.
// If the token is expiring within the next 45 mins, try to fetch a new token if there is no thread already doing
// it.
// If a thread is already doing the refresh, just use the existing token and proceed.
static synchronized boolean checkIfNeedNewAccessToken(SQLServerConnection connection, Date accessTokenExpireDate) {
Date now = new Date();
// if the token's expiration is within the next 45 mins
// 45 mins * 60 sec/min * 1000 millisec/sec
if ((accessTokenExpireDate.getTime() - now.getTime()) < (45 * 60 * 1000)) {
// within the next 10 mins
if ((accessTokenExpireDate.getTime() - now.getTime()) < (10 * 60 * 1000)) {
return true;
} else {
// check if another thread is already updating the access token
if (connection.attemptRefreshTokenLocked) {
return false;
} else {
connection.attemptRefreshTokenLocked = true;
return true;
}
}
}
return false;
}
@SuppressWarnings("unchecked")
static T newInstance(Class returnType, String className, String constructorArg,
Object[] msgArgs) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException, ClassNotFoundException {
Class clazz = Class.forName(className);
if (!returnType.isAssignableFrom(clazz)) {
MessageFormat form = new MessageFormat(SQLServerException.getErrString("R_unassignableError"));
throw new IllegalArgumentException(form.format(msgArgs));
}
if (constructorArg == null) {
return (T) clazz.getDeclaredConstructor().newInstance();
} else {
return (T) clazz.getDeclaredConstructor(String.class).newInstance(constructorArg);
}
}
/**
* Escapes single quotes (') in object name to convert and pass it as String safely.
*
* @param name
* Object name to be passed as String
* @return Converted object name
*/
static String escapeSingleQuotes(String name) {
return name.replace("'", "''");
}
static String convertInputStreamToString(java.io.InputStream is) throws IOException {
java.io.ByteArrayOutputStream result = new java.io.ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = is.read(buffer)) != -1) {
result.write(buffer, 0, length);
}
return result.toString();
}
static String zeroOneToYesNo(int i) {
return 0 == i ? "NO" : "YES";
}
static byte[] charsToBytes(char[] chars) {
if (chars == null)
return null;
byte[] bytes = new byte[chars.length * 2];
for (int i = 0; i < chars.length; i++) {
bytes[i * 2] = (byte) (0xff & (chars[i] >> 8));
bytes[i * 2 + 1] = (byte) (0xff & (chars[i]));
}
return bytes;
}
static char[] bytesToChars(byte[] bytes) {
if (bytes == null)
return null;
char[] chars = new char[bytes.length / 2];
for (int i = 0; i < chars.length; i++) {
chars[i] = (char) (((0xFF & (bytes[i * 2])) << 8) | (0xFF & bytes[i * 2 + 1]));
}
return chars;
}
}
final class SQLIdentifier {
// Component names default to empty string (rather than null) for consistency
// with API behavior which returns empty string (rather than null) when the
// particular value is not present.
private String serverName = "";
final String getServerName() {
return serverName;
}
final void setServerName(String name) {
serverName = name;
}
private String databaseName = "";
final String getDatabaseName() {
return databaseName;
}
final void setDatabaseName(String name) {
databaseName = name;
}
private String schemaName = "";
final String getSchemaName() {
return schemaName;
}
final void setSchemaName(String name) {
schemaName = name;
}
private String objectName = "";
final String getObjectName() {
return objectName;
}
final void setObjectName(String name) {
objectName = name;
}
final String asEscapedString() {
StringBuilder fullName = new StringBuilder(256);
if (serverName.length() > 0)
fullName.append("[").append(serverName).append("].");
if (databaseName.length() > 0)
fullName.append("[").append(databaseName).append("].");
else
assert 0 == serverName.length();
if (schemaName.length() > 0)
fullName.append("[").append(schemaName).append("].");
else if (databaseName.length() > 0)
fullName.append('.');
fullName.append("[").append(objectName).append("]");
return fullName.toString();
}
}