Package org.apache.commons.math4.linear

Class DefaultRealMatrixChangingVisitor

java.lang.Object
org.apache.commons.math4.linear.DefaultRealMatrixChangingVisitor
All Implemented Interfaces:
RealMatrixChangingVisitor
public class DefaultRealMatrixChangingVisitor
extends java.lang.Object
implements RealMatrixChangingVisitor
Default implementation of the RealMatrixChangingVisitor interface.

This class is a convenience to create custom visitors without defining all methods. This class provides default implementations that do nothing.

Since:
2.0

  • Constructor Summary

    Constructors 
    Constructor Description
    DefaultRealMatrixChangingVisitor()  

  • Method Summary

    Modifier and Type Method Description
    double end()
    End visiting a matrix.
    void start​(int rows, int columns, int startRow, int endRow, int startColumn, int endColumn)
    Start visiting a matrix.
    double visit​(int row, int column, double value)
    Visit one matrix entry.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

  • Method Details

    • start

      public void start​(int rows, int columns, int startRow, int endRow, int startColumn, int endColumn)
      Start visiting a matrix.

      This method is called once before any entry of the matrix is visited.

      Specified by:
      start in interface RealMatrixChangingVisitor
      Parameters:
      rows - number of rows of the matrix
      columns - number of columns of the matrix
      startRow - Initial row index
      endRow - Final row index (inclusive)
      startColumn - Initial column index
      endColumn - Final column index (inclusive)

    • visit

      public double visit​(int row, int column, double value)
      Visit one matrix entry.
      Specified by:
      visit in interface RealMatrixChangingVisitor
      Parameters:
      row - row index of the entry
      column - column index of the entry
      value - current value of the entry
      Returns:
      the new value to be set for the entry

    • end

      public double end()
      End visiting a matrix.

      This method is called once after all entries of the matrix have been visited.

      Specified by:
      end in interface RealMatrixChangingVisitor
      Returns:
      the value that the walkInXxxOrder must return