pos and having a length of length.
*
* @throws SQLException
* if a database error occurs
*/
public synchronized byte[] getBytes(long pos, int length) throws SQLException {
checkClosed();
if (pos < 1) {
throw SQLError.createSQLException(Messages.getString("Blob.2"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
pos--;
if (pos > this.binaryData.length) {
throw SQLError.createSQLException(Messages.getString("Blob.3"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
if (pos + length > this.binaryData.length) {
throw SQLError.createSQLException(Messages.getString("Blob.4"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
byte[] newData = new byte[length];
System.arraycopy(getBinaryData(), (int) (pos), newData, 0, length);
return newData;
}
/**
* Returns the number of bytes in the BLOB value designated by this Blob
* object.
*
* @return the length of this blob
*
* @throws SQLException
* if a database error occurs
*/
public synchronized long length() throws SQLException {
checkClosed();
return getBinaryData().length;
}
/**
* @see java.sql.Blob#position(byte[], long)
*/
public synchronized long position(byte[] pattern, long start) throws SQLException {
throw SQLError.createSQLFeatureNotSupportedException();
}
/**
* Finds the position of the given pattern in this BLOB.
*
* @param pattern
* the pattern to find
* @param start
* where to start finding the pattern
*
* @return the position where the pattern is found in the BLOB, -1 if not
* found
*
* @throws SQLException
* if a database error occurs
*/
public synchronized long position(java.sql.Blob pattern, long start) throws SQLException {
checkClosed();
return position(pattern.getBytes(0, (int) pattern.length()), start);
}
private synchronized void setBinaryData(byte[] newBinaryData) {
this.binaryData = newBinaryData;
}
/**
* @see Blob#setBinaryStream(long)
*/
public synchronized OutputStream setBinaryStream(long indexToWriteAt) throws SQLException {
checkClosed();
if (indexToWriteAt < 1) {
throw SQLError.createSQLException(Messages.getString("Blob.0"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
WatchableOutputStream bytesOut = new WatchableOutputStream();
bytesOut.setWatcher(this);
if (indexToWriteAt > 0) {
bytesOut.write(this.binaryData, 0, (int) (indexToWriteAt - 1));
}
return bytesOut;
}
/**
* @see Blob#setBytes(long, byte[])
*/
public synchronized int setBytes(long writeAt, byte[] bytes) throws SQLException {
checkClosed();
return setBytes(writeAt, bytes, 0, bytes.length);
}
/**
* @see Blob#setBytes(long, byte[], int, int)
*/
public synchronized int setBytes(long writeAt, byte[] bytes, int offset, int length) throws SQLException {
checkClosed();
OutputStream bytesOut = setBinaryStream(writeAt);
try {
bytesOut.write(bytes, offset, length);
} catch (IOException ioEx) {
SQLException sqlEx = SQLError.createSQLException(Messages.getString("Blob.1"), MysqlErrorNumbers.SQL_STATE_GENERAL_ERROR,
this.exceptionInterceptor);
sqlEx.initCause(ioEx);
throw sqlEx;
} finally {
try {
bytesOut.close();
} catch (IOException doNothing) {
// do nothing
}
}
return length;
}
public synchronized void streamClosed(byte[] byteData) {
this.binaryData = byteData;
}
public synchronized void streamClosed(WatchableStream out) {
int streamSize = out.size();
if (streamSize < this.binaryData.length) {
out.write(this.binaryData, streamSize, this.binaryData.length - streamSize);
}
this.binaryData = out.toByteArray();
}
/**
* Truncates the BLOB value that this Blob object represents to be len bytes in length.
*
* Note: If the value specified for len is greater then the length+1 of the BLOB value then the behavior is undefined. Some
* JDBC drivers may throw a SQLException while other drivers may support this operation.
*
* @param len
* the length, in bytes, to which the BLOB value
* that this Blob object represents should be truncated
* @exception SQLException
* if there is an error accessing the BLOB value or if len is less than 0
* @exception SQLFeatureNotSupportedException
* if the JDBC driver does not support
* this method
* @since 1.4
*/
public synchronized void truncate(long len) throws SQLException {
checkClosed();
if (len < 0) {
throw SQLError.createSQLException(Messages.getString("Blob.5"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
if (len > this.binaryData.length) {
throw SQLError.createSQLException(Messages.getString("Blob.6"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
// TODO: Do this without copying byte[]s by maintaining some end pointer on the original data
byte[] newData = new byte[(int) len];
System.arraycopy(getBinaryData(), 0, newData, 0, (int) len);
this.binaryData = newData;
}
/**
* This method frees the Blob object and releases the resources that
* it holds. The object is invalid once the free method is called.
*
* After free has been called, any attempt to invoke a method other than free will result in a SQLException being
* thrown. If free is called multiple times, the subsequent calls to free are treated as a no-op.
*
*
* @throws SQLException
* if an error occurs releasing
* the Blob's resources
* @exception SQLFeatureNotSupportedException
* if the JDBC driver does not support
* this method
* @since 1.6
*/
public synchronized void free() throws SQLException {
this.binaryData = null;
this.isClosed = true;
}
/**
* Returns an InputStream object that contains a partial Blob value,
* starting with the byte specified by pos, which is length bytes in length.
*
* @param pos
* the offset to the first byte of the partial value to be retrieved.
* The first byte in the Blob is at position 1
* @param length
* the length in bytes of the partial value to be retrieved
* @return InputStream through which the partial Blob value can be read.
* @throws SQLException
* if pos is less than 1 or if pos is greater than the number of bytes
* in the Blob or if pos + length is greater than the number of bytes
* in the Blob
*
* @exception SQLFeatureNotSupportedException
* if the JDBC driver does not support
* this method
* @since 1.6
*/
public synchronized InputStream getBinaryStream(long pos, long length) throws SQLException {
checkClosed();
if (pos < 1) {
throw SQLError.createSQLException(Messages.getString("Blob.2"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
pos--;
if (pos > this.binaryData.length) {
throw SQLError.createSQLException(Messages.getString("Blob.6"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
if (pos + length > this.binaryData.length) {
throw SQLError.createSQLException(Messages.getString("Blob.4"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
return new ByteArrayInputStream(getBinaryData(), (int) pos, (int) length);
}
private synchronized void checkClosed() throws SQLException {
if (this.isClosed) {
throw SQLError.createSQLException(Messages.getString("Blob.7"), MysqlErrorNumbers.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
}
}
}