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public interface ServiceOperation
Defines an operation which turns an input tuple into an output tuple.
Suitable for use with MultiServiceColumnCalculator
.
Method Summary | |
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Object[] |
calculateRow(Object[] tuple)
Calculates the output tuple for a given input tuple. |
StarTable |
getResultMetadata()
Returns the metadata-only table describing the rows which will be returned by this operation. |
Method Detail |
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StarTable getResultMetadata()
TableSink.acceptMetadata(uk.ac.starlink.table.StarTable)
.
Its data must not be read.
Object[] calculateRow(Object[] tuple) throws IOException
tuple
- input tuple
IOException
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