Package weka.knowledgeflow.steps

Class Sorter.SortRule

java.lang.Object
weka.knowledgeflow.steps.Sorter.SortRule
All Implemented Interfaces:
Comparator<weka.knowledgeflow.steps.Sorter.InstanceHolder>
Enclosing class:
Sorter
public static class Sorter.SortRule extends Object implements Comparator<weka.knowledgeflow.steps.Sorter.InstanceHolder>
Implements a sorting rule based on a single attribute

  • Constructor Details

    • SortRule

      public SortRule(String att, boolean descending)
      Constructor
      Parameters:
      att - the name or index of the attribute to compare on
      descending - true if order should be descending

    • SortRule

      public SortRule()
      Constructor

    • SortRule

      public SortRule(String setup)
      Constructor
      Parameters:
      setup - the definition of a sort rule

  • Method Details

    • toStringInternal

      public String toStringInternal()
      Gets the rule in internal format
      Returns:
      the rule in internal format

    • toString

      public String toString()
      Prints the rule in human readable format
      Overrides:
      toString in class Object
      Returns:
      a human readable formatted rule

    • setAttribute

      public void setAttribute(String att)
      Set the name or index of the attribute to sort on
      Parameters:
      att - the name or index of tha attribute to sort on

    • getAttribute

      public String getAttribute()
      Get the name or index of the attribute to sort on
      Returns:
      the name or index of the attribute to sort on

    • setDescending

      public void setDescending(boolean d)
      Set whether the sort should be descending rather than ascending
      Parameters:
      d - true for a descending sort

    • getDescending

      public boolean getDescending()
      Return true if the sort is descending
      Returns:
      true if the sort is descending

    • init

      public void init(Environment env, Instances structure)
      Initialize the rule
      Parameters:
      env - the environment variables to use
      structure - the structure of the instances that the rule will opperate on

    • compare

      public int compare(weka.knowledgeflow.steps.Sorter.InstanceHolder o1, weka.knowledgeflow.steps.Sorter.InstanceHolder o2)
      Compare two instances according to the rule
      Specified by:
      compare in interface Comparator<weka.knowledgeflow.steps.Sorter.InstanceHolder>
      Parameters:
      o1 - the first instance
      o2 - the second instance
      Returns:
      the result of the comparison