public void writeData(DataOutput strm) throws IOException {
/* Work out the length of each row in bytes. */
int rowBytes = 0;
int ncol = table.getColumnCount();
for (int icol = 0; icol < ncol; icol++) {
ColumnWriter writer = colWriters[icol];
if (writer != null) {
rowBytes += writer.getLength();
}
}
/* Write the data cells, delegating the item in each column to
* the writer that knows how to handle it. */
long nWritten = 0L;
RowSequence rseq = table.getRowSequence();
try {
while (rseq.next()) {
Object[] row = rseq.getRow();
for (int icol = 0; icol < ncol; icol++) {
ColumnWriter writer = colWriters[icol];
if (writer != null) {
writer.writeValue(strm, row[icol]);
}
}
nWritten += rowBytes;
}
} finally {
rseq.close();
}
/* Write padding. */
int extra = (int) (nWritten % (long) 2880);
if (extra > 0) {
strm.write(new byte[2880 - extra]);
}
}
public Header getHeader() throws HeaderCardException {
/* Work out the dimensions in columns and bytes of the table. */
int rowLength = 0;
int nUseCol = 0;
int ncol = table.getColumnCount();
for (int icol = 0; icol < ncol; icol++) {
ColumnWriter writer = colWriters[icol];
if (writer != null) {
nUseCol++;
rowLength += writer.getLength();
}
}
/* Prepare a FITS header block. */
Header hdr = new Header();
/* Add HDU layout metadata. */
hdr.addValue("XTENSION", "BINTABLE", "binary table extension");
hdr.addValue("BITPIX", 8, "8-bit bytes");
hdr.addValue("NAXIS", 2, "2-dimensional table");
hdr.addValue("NAXIS1", rowLength, "width of table in bytes");
hdr.addValue("NAXIS2", rowCount, "number of rows in table");
hdr.addValue("PCOUNT", 0, "size of special data area");
hdr.addValue("GCOUNT", 1, "one data group");
hdr.addValue("TFIELDS", nUseCol, "number of columns");
/* Add EXTNAME record containing table name. */
String tname = table.getName();
if (tname != null && tname.trim().length() > 0) {
FitsConstants.addTrimmedValue(hdr, "EXTNAME", tname, "table name");
}
/* Add HDU metadata describing columns. */
int jcol = 0;
for (int icol = 0; icol < ncol; icol++) {
ColumnWriter colwriter = colWriters[icol];
if (colwriter != null) {
jcol++;
String forcol = " for column " + jcol;
ColumnInfo colinfo = colInfos[icol];
/* Name. */
String name = colinfo.getName();
if (name != null && name.trim().length() > 0) {
FitsConstants.addTrimmedValue(hdr, "TTYPE" + jcol, name, "label" + forcol);
}
/* Format. */
String form = colwriter.getFormat();
hdr.addValue("TFORM" + jcol, form, "format" + forcol);
/* Units. */
String unit = colinfo.getUnitString();
if (unit != null && unit.trim().length() > 0) {
FitsConstants.addTrimmedValue(hdr, "TUNIT" + jcol, unit, "units" + forcol);
}
/* Blank. */
Number bad = colwriter.getBadNumber();
if (bad != null) {
hdr.addValue("TNULL" + jcol, bad.longValue(), "blank value" + forcol);
}
/* Shape. */
int[] dims = colwriter.getDims();
if (dims != null && dims.length > 1) {
StringBuffer sbuf = new StringBuffer();
for (int i = 0; i < dims.length; i++) {
sbuf.append(i == 0 ? '(' : ',');
sbuf.append(dims[i]);
}
sbuf.append(')');
hdr.addValue("TDIM" + jcol, sbuf.toString(), "dimensions" + forcol);
}
/* Scaling. */
double zero = colwriter.getZero();
double scale = colwriter.getScale();
if (zero != 0.0) {
hdr.addValue("TZERO" + jcol, zero, "base" + forcol);
}
if (scale != 1.0) {
hdr.addValue("TSCALE" + jcol, scale, "factor" + forcol);
}
/* Comment (non-standard). */
String comm = colinfo.getDescription();
if (comm != null && comm.trim().length() > 0) {
try {
hdr.addValue("TCOMM" + jcol, comm, null);
} catch (HeaderCardException e) {
// never mind.
}
}
/* UCD (non-standard). */
String ucd = colinfo.getUCD();
if (ucd != null && ucd.trim().length() > 0 && ucd.length() < 68) {
try {
hdr.addValue("TUCD" + jcol, ucd, null);
} catch (HeaderCardException e) {
// never mind.
}
}
/* Utype (non-standard). */
String utype = colinfo.getUtype();
if (utype != null && utype.trim().length() > 0 && utype.trim().length() < 68) {
try {
hdr.addValue("TUTYP" + jcol, utype, null);
} catch (HeaderCardException e) {
// never mind.
}
}
}
}
return hdr;
}
