Package math.matrix.equationParser

Class LinearSystemParser

  • public class LinearSystemParser
extends java.lang.Object
    Author:
    JIBOYE Oluwagbemiro Olaoluwa

    • Constructor Summary

      Constructors 
      Constructor Description
      LinearSystemParser​(java.lang.String systemOfEquations)  

    • Method Summary

      Modifier and Type Method Description
      void appendOneToStartOfFreeVariables()
      When the situation x+2y+z=9; is met, this method will convert it into 1.0x+2y+z=9;
      void buildMatrix()
      Builds the Matrix object that will contain the executable generated by this LinearSystemParser object.
      void countVariablesAndValidateTheNumberOfEqualsAndSemiColons()
      Counts the number of unknowns in the system and compares it with the number of equations in the system.
      void doAritmetic()
      Handles split variable arithmetic in + and - alone.
      int getDimension()  
      java.lang.String getEndOfLine()  
      Matrix getEquationMatrix()  
      java.util.ArrayList<java.lang.String> getScanner()  
      java.lang.String getSystemOfEquations()  
      java.util.ArrayList<java.lang.String> getUnknowns()  
      java.lang.String interpretedSystem()
      This builds the ideal form of the system with 0 coefficients assigned to parts of the system where an unknown is missing...e.g in 2x+3y+4z=9; 7x+5z=8; 6y=9; This system will eventually be converted into 2x+3y+4z=9; 7x+0y+5z=8; 0x+6y+0z=9;
      boolean isValid()  
      static void main​(java.lang.String[] args)  
      void setDimension​(int dimension)  
      void setEndOfLine​(java.lang.String endOfLine)  
      void setScanner​(java.util.ArrayList<java.lang.String> scanner)  
      void setSystemOfEquations​(java.lang.String systemOfEquations)  
      void setValid​(boolean valid)  
      void validateNumbers()
      Checks the left and right of a number to see if the appropriate items are the ones there.
      void validateOperators()
      Checks the left and right of an operator to see if the appropriate items are the ones there.
      void validateVars()
      Checks the left and right of all variables to see if the appropriate items are the ones there.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • LinearSystemParser

        public LinearSystemParser​(java.lang.String systemOfEquations)

    • Method Detail

      • setEndOfLine

        public void setEndOfLine​(java.lang.String endOfLine)

      • getEndOfLine

        public java.lang.String getEndOfLine()

      • getUnknowns

        public java.util.ArrayList<java.lang.String> getUnknowns()

      • getEquationMatrix

        public Matrix getEquationMatrix()

      • setValid

        public void setValid​(boolean valid)

      • isValid

        public boolean isValid()

      • setDimension

        public void setDimension​(int dimension)

      • getDimension

        public int getDimension()

      • setSystemOfEquations

        public void setSystemOfEquations​(java.lang.String systemOfEquations)

      • getSystemOfEquations

        public java.lang.String getSystemOfEquations()

      • setScanner

        public void setScanner​(java.util.ArrayList<java.lang.String> scanner)

      • getScanner

        public java.util.ArrayList<java.lang.String> getScanner()

      • appendOneToStartOfFreeVariables

        public void appendOneToStartOfFreeVariables()
        When the situation x+2y+z=9; is met, this method will convert it into 1.0x+2y+z=9;

      • countVariablesAndValidateTheNumberOfEqualsAndSemiColons

        public void countVariablesAndValidateTheNumberOfEqualsAndSemiColons()
        Counts the number of unknowns in the system and compares it with the number of equations in the system. They must be equal and so it carries out this validation also. This method also fills the ArrayList object that records the unknowns in the system with one copy of each unknown found in the system.

      • validateVars

        public void validateVars()
        Checks the left and right of all variables to see if the appropriate items are the ones there. It is a syntax error if an invalid item is found there

      • validateNumbers

        public void validateNumbers()
        Checks the left and right of a number to see if the appropriate items are the ones there. It is a syntax error if an invalid item is found there

      • validateOperators

        public void validateOperators()
        Checks the left and right of an operator to see if the appropriate items are the ones there. It is a syntax error if an invalid item is found there

      • doAritmetic

        public void doAritmetic()
        Handles split variable arithmetic in + and - alone. e.g 2x+3y+4z+7x-9=3x-8y+2; 4z-2x-9=3x-8y+2z+9; -9x+5y+x=9x-2y+2; is converted into 6x+11y+4z=11; -5x+8y+2z=18; -17x+7y=2;

      • buildMatrix

        public void buildMatrix()
        Builds the Matrix object that will contain the executable generated by this LinearSystemParser object.

      • interpretedSystem

        public java.lang.String interpretedSystem()
        This builds the ideal form of the system with 0 coefficients assigned to parts of the system where an unknown is missing...e.g in 2x+3y+4z=9; 7x+5z=8; 6y=9; This system will eventually be converted into 2x+3y+4z=9; 7x+0y+5z=8; 0x+6y+0z=9;

      • main

        public static void main​(java.lang.String[] args)