Class WrapperColumn

  • Direct Known Subclasses:
    EditableColumn

    public class WrapperColumn
    extends ColumnData
    ColumnData which wraps another ColumnData. The behaviour of this ColumnData is identical to that of the base one. It is intended for subclasses which may modify the behaviour in some way.
    Author:
    Mark Taylor (Starlink)
    • Constructor Summary

      Constructors 
      Constructor Description
      WrapperColumn​(ColumnData base)
      Initialises a new WrapperColumn based on a base column.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      ColumnData getBaseColumn()
      Returns the column on which this one is based.
      boolean isWritable()
      Indicates whether this object can store values.
      java.lang.Object readValue​(long irow)
      Returns the value stored at a given row in this column.
      void storeValue​(long irow, java.lang.Object val)
      Stores a given value in a given row for this column.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • WrapperColumn

        public WrapperColumn​(ColumnData base)
        Initialises a new WrapperColumn based on a base column.
        Parameters:
        base - the base column
    • Method Detail

      • readValue

        public java.lang.Object readValue​(long irow)
                                   throws java.io.IOException
        Description copied from class: ColumnData
        Returns the value stored at a given row in this column.
        Specified by:
        readValue in class ColumnData
        Parameters:
        irow - the row from which to retrieve the value
        Returns:
        the value stored at irow
        Throws:
        java.io.IOException - if there is some problem reading
      • storeValue

        public void storeValue​(long irow,
                               java.lang.Object val)
                        throws java.io.IOException
        Description copied from class: ColumnData
        Stores a given value in a given row for this column. Will only work if the isWritable method returns true. The implementation in the ColumnData class throws an UnsupportedOperationException.
        Overrides:
        storeValue in class ColumnData
        Parameters:
        irow - the row to store it in
        val - the object to store
        Throws:
        java.io.IOException - if there is some problem writing
      • getBaseColumn

        public ColumnData getBaseColumn()
        Returns the column on which this one is based.
        Returns:
        wrapped column