Class CachedTupleSequence

java.lang.Object
uk.ac.starlink.ttools.plot2.data.CachedTupleSequence
All Implemented Interfaces:
Tuple, TupleSequence, uk.ac.starlink.util.Sequence, uk.ac.starlink.util.Splittable<TupleSequence>
public class CachedTupleSequence extends Object implements TupleSequence
TupleSequence implementation based on CachedColumns.
Since:
3 Jan 2020
Author:
Mark Taylor

  • Constructor Details

    • CachedTupleSequence

      public CachedTupleSequence(Supplier<CachedReader> maskSupplier, Supplier<CachedReader[]> colsSupplier, long nrow)
      Public constructor.
      Parameters:
      maskSupplier - supplier for boolean-typed column reader, providing inclusion flags per row; null means include all rows
      colsSupplier - supplier for array of columns providing data cells per row

  • Method Details

    • next

      public boolean next()
      Description copied from interface: TupleSequence
      Advances to the next entry. No exception is thrown.
      Specified by:
      next in interface uk.ac.starlink.util.Sequence
      Specified by:
      next in interface TupleSequence

    • split

      public TupleSequence split()
      Specified by:
      split in interface uk.ac.starlink.util.Splittable<TupleSequence>

    • splittableSize

      public long splittableSize()
      Specified by:
      splittableSize in interface uk.ac.starlink.util.Splittable<TupleSequence>

    • getRowIndex

      public long getRowIndex()
      Description copied from interface: Tuple
      Returns the row index for the underlying data set. Note this value may not undergo a simple increment between steps (if rows are excluded from the underlying data set it may increase by more than one in some cases).
      Specified by:
      getRowIndex in interface Tuple
      Returns:
      row index of underlying table row

    • getObjectValue

      public Object getObjectValue(int icol)
      Description copied from interface: Tuple
      Returns the value of a given column as an object. If that element of the tuple is not of object type, the result may not be useful.

      If the result is a mutable object, its value may be overwritten by subsequent calls to this method (especially following calls to TupleSequence.next() if this object also implements TupleSequence).

      Specified by:
      getObjectValue in interface Tuple
      Parameters:
      icol - column index
      Returns:
      value of element icol, presumed of object type

    • getDoubleValue

      public double getDoubleValue(int icol)
      Description copied from interface: Tuple
      Returns the value of a given column as a double. If that element of the tuple is not of numeric type, the result may not be useful.
      Specified by:
      getDoubleValue in interface Tuple
      Parameters:
      icol - column index
      Returns:
      value of element icol, presumed of numeric type

    • getIntValue

      public int getIntValue(int icol)
      Description copied from interface: Tuple
      Returns the value of a given column as an integer. If that element of the tuple is not of numeric type, the result may not be useful.
      Specified by:
      getIntValue in interface Tuple
      Parameters:
      icol - column index
      Returns:
      value of element icol, presumed of numeric type

    • getLongValue

      public long getLongValue(int icol)
      Description copied from interface: Tuple
      Returns the value of a given column as a long. If that element of the tuple is not of numeric type, the result may not be useful.
      Specified by:
      getLongValue in interface Tuple
      Parameters:
      icol - column index
      Returns:
      value of element icol, presumed of numeric type

    • getBooleanValue

      public boolean getBooleanValue(int icol)
      Description copied from interface: Tuple
      Returns the value of a given column as a boolean. If that element of the table is not of boolean type, the result may not be useful.
      Specified by:
      getBooleanValue in interface Tuple
      Parameters:
      icol - column index
      Returns:
      value of element icol, presumed of boolean type

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