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java.lang.Object | +--uk.ac.starlink.fits.FitsTableWriter
Handles writing of a StarTable in FITS binary format. Not all columns can be written to a FITS table, only those ones whose contentClass is in the following list:
Output is currently to fixed-width columns only. For StarTable columns of variable size, a first pass is made through the table data to determine the largest size they assume, and the size in the output table is set to the largest of these. Excess space is padded with some sort of blank value (NaN for floating point values, spaces for strings, zero-like values otherwise).
Null cell values are written using some zero-like value, not a proper blank value. Doing this right would require some changes to the tables infrastructure.
Constructor Summary | |
FitsTableWriter()
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Method Summary | |
String |
getFormatName()
Returns "FITS". |
boolean |
looksLikeFile(String location)
Returns true if location ends with something like ".fit" or ".fits" or ".fts". |
protected void |
writePrimary(StarTable startab,
DataOutputStream strm)
Called from writeStarTable(uk.ac.starlink.table.StarTable, java.lang.String) to write headers prior to the
BINTABLE header which contains the table proper. |
void |
writeStarTable(StarTable startab,
String location)
Writes a table in FITS binary format. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public FitsTableWriter()
Method Detail |
public String getFormatName()
getFormatName
in interface StarTableWriter
public boolean looksLikeFile(String location)
looksLikeFile
in interface StarTableWriter
location
- filename
public void writeStarTable(StarTable startab, String location) throws IOException
writeStarTable
in interface StarTableWriter
startab
- the table to writelocation
- the filename to write to
IOException
protected void writePrimary(StarTable startab, DataOutputStream strm) throws IOException
writeStarTable(uk.ac.starlink.table.StarTable, java.lang.String)
to write headers prior to the
BINTABLE header which contains the table proper.
The default implementation writes an empty primary HDU;
subclasses may write one or more headers, though the first one
should be a legal primary FITS HDU.
startab
- the table which will be written into the next HDUstrm
- the stream down which it will be written
IOException
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Copyright © 2004 CLRC: Central Laboratory of the Research Councils. All rights reserved. | |||||||||
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