Package uk.ac.starlink.ttools.plot2.data
Interface UserDataReader
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public interface UserDataReader
Reader that can interrogate a RowData to return the coordinate and mask values specified by a DataSpec. It is applied to a RowData obtained from the DataSpec's source table.Instances of this object are not expected to be usable from multiple concurrent threads.
- Since:
- 10 Feb 2013
- Author:
- Mark Taylor
- See Also:
DataSpec
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description boolean
getMaskFlag(uk.ac.starlink.table.RowData rdata, long irow)
Returns the mask flag for a row.java.lang.Object[]
getUserCoordValues(uk.ac.starlink.table.RowData rdata, long irow, int icoord)
Returns a user coordinate value array for a given coordinate in a row.
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Method Detail
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getMaskFlag
boolean getMaskFlag(uk.ac.starlink.table.RowData rdata, long irow) throws java.io.IOException
Returns the mask flag for a row.- Parameters:
rdata
- row data for the rowirow
- row index of the row- Returns:
- true iff the row of interest is included in the data set
- Throws:
java.io.IOException
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getUserCoordValues
java.lang.Object[] getUserCoordValues(uk.ac.starlink.table.RowData rdata, long irow, int icoord) throws java.io.IOException
Returns a user coordinate value array for a given coordinate in a row. The returned value is an array which may be re-used, so it should not be assumed to retain its contents between calls to this method.- Parameters:
rdata
- row datairow
- row index corresponding to the rowicoord
- coordinate index to read- Returns:
- array of user values (not storage values) for the specified coordinate at the row of interest
- Throws:
java.io.IOException
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