Package edu.caltech.nanodb.queryeval

Class PrettyPrintTools

  • public class PrettyPrintTools
extends java.lang.Object
    Various methods to use for pretty-printing, such as delimiters, padding, and such.
    Author:
    Angela Gong

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.util.ArrayList<ColumnType> colTypes
      Stores the column type for each column
      private java.util.ArrayList<java.lang.Integer> colWidths
      Stores the maximum column widths for each column
      private int numColumns
      The number of columns to print
      private java.io.PrintStream out  

    • Constructor Summary

      Constructors 
      Constructor Description
      PrettyPrintTools​(java.io.PrintStream out, java.util.ArrayList<java.lang.Integer> colWidths, java.util.ArrayList<ColumnType> colTypes, int numColumns)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void checkColumnWidths​(java.lang.String str, int col)
      Changes the maximum column width stored if necessary
      int getColumnWidth​(int index)
      Gets the width of a specified column.
      java.lang.String padString​(java.lang.Integer colWidth, java.lang.String str)
      Pads a string with the spaces on either end necessary when printing.
      java.lang.String padString​(java.lang.Integer colWidth, java.lang.String str, int index)
      Pads a string with the spaces on either end necessary when printing.
      void printDelimiter()
      Prints the delimiter, i.e.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • out

        private java.io.PrintStream out

      • colWidths

        private java.util.ArrayList<java.lang.Integer> colWidths
        Stores the maximum column widths for each column

      • colTypes

        private java.util.ArrayList<ColumnType> colTypes
        Stores the column type for each column

      • numColumns

        private int numColumns
        The number of columns to print

    • Constructor Detail

      • PrettyPrintTools

        public PrettyPrintTools​(java.io.PrintStream out,
                        java.util.ArrayList<java.lang.Integer> colWidths,
                        java.util.ArrayList<ColumnType> colTypes,
                        int numColumns)

    • Method Detail

      • printDelimiter

        public void printDelimiter()
        Prints the delimiter, i.e. the "+-------+--------+" portion.

      • getColumnWidth

        public int getColumnWidth​(int index)
        Gets the width of a specified column.
        Parameters:
        index - the index of the colujmn
        Returns:
        the column width

      • padString

        public java.lang.String padString​(java.lang.Integer colWidth,
                                  java.lang.String str)
        Pads a string with the spaces on either end necessary when printing.
        Parameters:
        colWidth - the width of the column the string will be printed in
        str - the string to be printed
        Returns:
        the newly-padded string

      • padString

        public java.lang.String padString​(java.lang.Integer colWidth,
                                  java.lang.String str,
                                  int index)
        Pads a string with the spaces on either end necessary when printing. Also handles if tuples are numbers, in that case, the column is aligned right instead of left
        Parameters:
        colWidth - the width of the column the string will be printed in
        str - the string to be printed
        index - the index of the column being printed
        Returns:
        the newly-padded string

      • checkColumnWidths

        public void checkColumnWidths​(java.lang.String str,
                              int col)
        Changes the maximum column width stored if necessary
        Parameters:
        str - the string added to the list of things to print
        col - the column it was added at