Package uk.ac.starlink.ttools.calc
Class MultiServiceColumnCalculator<S>
java.lang.Object
uk.ac.starlink.ttools.calc.MultiServiceColumnCalculator<S>
- All Implemented Interfaces:
ColumnCalculator<S>
- Direct Known Subclasses:
SchlegelCalculator
ColumnCalculator implementation which works by invoking a service for
each row. In this case the calculation can be done row by row, but if
the service is slow use of the ColumnCalculator interface can allow
multiplexing for performance.
- Since:
- 14 Oct 2011
- Author:
- Mark Taylor
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
calculateColumns
(S spec, uk.ac.starlink.table.StarTable tupleTable, uk.ac.starlink.table.TableSink sink) Performs the calculation.abstract ServiceOperation
createServiceOperation
(S spec) Defines the service operation to be invoked for each row.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface uk.ac.starlink.ttools.calc.ColumnCalculator
getTupleInfos
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Constructor Details
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MultiServiceColumnCalculator
public MultiServiceColumnCalculator()
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Method Details
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createServiceOperation
Defines the service operation to be invoked for each row.- Parameters:
spec
- specification object for the calculation
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calculateColumns
public void calculateColumns(S spec, uk.ac.starlink.table.StarTable tupleTable, uk.ac.starlink.table.TableSink sink) throws IOException Description copied from interface:ColumnCalculator
Performs the calculation. Rows are written to the output sink based on the input table and configuration contained in thespec
object. The output table must have the same number of rows as the input table, and will not normally contain any of the same columns.- Specified by:
calculateColumns
in interfaceColumnCalculator<S>
- Parameters:
spec
- specification object providing additional instructions about the calculation to be performedtupleTable
- input table, with one column for each tuple elementsink
- sink to which the output table is written- Throws:
IOException
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