/**
* This helper method saves just the .dbf file header portion of the mapTable argument using the
* dos stream.
*
* @param dos The stream writing to the .dbf file.
* @param mapTable The dbf table being saved.
* @throws IOException Thrown when the stream fails.
*/
private void saveHeader(DataOutputStream dos, DBFTable mapTable) throws IOException {
// DBF file type (0)
dos.writeByte(mapTable.getFileType());
// LAST UPDATE (1-3)
byte year = (byte) (mapTable.getLastModifiedDate().get(Calendar.YEAR) - 1900);
byte month = (byte) (mapTable.getLastModifiedDate().get(Calendar.MONTH) + 1);
byte day = (byte) (mapTable.getLastModifiedDate().get(Calendar.DATE));
dos.writeByte(year);
dos.writeByte(month);
dos.writeByte(day);
// NUMBER OF RECORDS IN FILE (4-7)
int numberOfRecordsInFile = Integer.reverseBytes(mapTable.getNumberOfRecords());
dos.writeInt(numberOfRecordsInFile);
// POSITION OF FIRST DATA RECORDED (8-9)
short positionOfFirstDataRecorded =
Short.reverseBytes(mapTable.getPositionOfFirstDataRecorded());
dos.writeShort(positionOfFirstDataRecorded);
// LENGTH OF ONE DATA RECORD, INCLUDING DELETE FLAG (10-11)
short dataRecordLength = Short.reverseBytes(mapTable.getDataRecordLength());
dos.writeShort(dataRecordLength);
// ZEROES (12-13)
short zeroes = Short.reverseBytes(mapTable.getZeroes());
dos.writeShort(zeroes);
// DBASE IV Transaction Flag (14)
dos.writeByte(mapTable.getDbaseTransactionFlag());
// DBASE IV Encryption Flag (15)
dos.writeByte(mapTable.getDbaseEncryptionFlag());
// Multiuser Processing 12 Bytes (16-27)
int[] mup = mapTable.getMup();
dos.writeInt(Integer.reverseBytes(mup[0]));
dos.writeInt(Integer.reverseBytes(mup[1]));
dos.writeInt(Integer.reverseBytes(mup[2]));
// TABLE FLAGS (28)
dos.writeByte(mapTable.getFlags());
// CODE PAGE MARK/LANGUAGE DRIVER ID (29)
dos.writeByte(mapTable.getCodePageMark());
// RESERVED, CONTAINS 0x00 (30-31)
dos.writeShort(Short.reverseBytes(mapTable.getReserved()));
}
