Class Cases


  • public class Cases
    extends java.lang.Object
    An object of type Cases stores a list of "case values" that is generated while an expression is being evaluated using the routine Expression.getValuesWithCases(). This information can be used as a heuristic (i.e. a fudge) to help detect a possible discontinuity between two evaluations of the expression. Suppose that the expression is evaluated twice, with some change of variable values between the two evaluations. If the variables' values are not changed too much, and if the Cases objects generated by the two evaluations are equal (as determined by the "equals" method defined in this class), then it is likely that there is no discontinuity. (However, this is not perfect. The discontinuity in 1/x^2 won't be detected since the case value generated by 1/f(x) only checks the sign of f(x), and the denominator of 1/x^2 is positive on both sides of x=0. If you want to be more paranoid, check both the expression and its derivative.) (I really don't like this very much, but it can be used to draw pretty good graphs in general.)
    • Constructor Summary

      Constructors 
      Constructor Description
      Cases()  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addCase​(int value)
      Add a new case value to the list stored in this object.
      void clear()
      Remove all the cases that have been added with addCase().
      boolean equals​(Cases c)
      Test whether c contains exactly the same list of case values as this Cases object does.
      • Methods inherited from class java.lang.Object

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

      • Cases

        public Cases()
    • Method Detail

      • clear

        public void clear()
        Remove all the cases that have been added with addCase(). This makes it possible to reuse this object in another call to Expression.getValueWithCases().
      • addCase

        public void addCase​(int value)
        Add a new case value to the list stored in this object.
      • equals

        public boolean equals​(Cases c)
        Test whether c contains exactly the same list of case values as this Cases object does.