Package uk.ac.starlink.ttools.plottask

Class TablePlotData

  • All Implemented Interfaces:
    PlotData
    Direct Known Subclasses:
    CartesianTablePlotData
    public abstract class TablePlotData
extends java.lang.Object
implements PlotData
    Abstract superclass for PlotData implementation representing the data from a single table with associated expressions describing coordinate selections etc. Concrete subclasses must see to provision of coordinate and error data.
    Since:
    22 Apr 2008
    Author:
    Mark Taylor

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected TablePlotData​(uk.ac.starlink.table.StarTable table, java.lang.String[] setExprs, java.lang.String[] setNames, Style[] setStyles, java.lang.String labelExpr)
      Constructor.

    • Constructor Detail

      • TablePlotData

        protected TablePlotData​(uk.ac.starlink.table.StarTable table,
                        java.lang.String[] setExprs,
                        java.lang.String[] setNames,
                        Style[] setStyles,
                        java.lang.String labelExpr)
        Constructor.
        Parameters:
        table - table this data is based on
        setExprs - nset-element array of JEL boolean expressions for subset inclusion criteria
        setNames - nset-element array of subset names
        setStyles - nset-element array of subset plot styles
        labelExpr - JEL String expression for text label

    • Method Detail

      • createPointSequence

        protected abstract PointSequence createPointSequence​(SequentialJELRowReader rseq)
                                              throws gnu.jel.CompilationException
        Constructs a point sequence suitable for dispensing by this plot data.
        Parameters:
        rseq - row reader representing this data's table
        Returns:
        new point sequence for plotting
        Throws:
        gnu.jel.CompilationException

      • getSetCount

        public int getSetCount()
        Description copied from interface: PlotData
        Returns the number of subsets in this object.
        Specified by:
        getSetCount in interface PlotData
        Returns:
        subset count

      • getSetName

        public java.lang.String getSetName​(int iset)
        Description copied from interface: PlotData
        Returns the name for a given subset.
        Specified by:
        getSetName in interface PlotData
        Parameters:
        iset - subset index
        Returns:
        subset name

      • getSetStyle

        public Style getSetStyle​(int iset)
        Description copied from interface: PlotData
        Returns the plotting style for a given subset.
        Specified by:
        getSetStyle in interface PlotData
        Parameters:
        iset - subset index
        Returns:
        subset style

      • hasLabels

        public boolean hasLabels()
        Description copied from interface: PlotData
        Indicates whether there are or may be text labels associated with the data points in this object.
        Specified by:
        hasLabels in interface PlotData
        Returns:
        true if PointSequence.getLabel() may have non-null returns

      • getPointSequence

        public PointSequence getPointSequence()
        Description copied from interface: PlotData
        Returns an iterator over the data points in this object.
        Specified by:
        getPointSequence in interface PlotData
        Returns:
        new point iterator

      • checkExpressions

        public void checkExpressions()
                      throws gnu.jel.CompilationException
        Checks that any JEL expressions used by the data for this object compile correctly. A dummy call of createPointSequence(uk.ac.starlink.ttools.jel.SequentialJELRowReader) is made.
        Throws:
        gnu.jel.CompilationException - if one is thrown by createPointSequence