MjoFunctionSeries.java :  » Graphic-Library » mjograph » mjo » core » data » Java Open Source

package mjo.core.data;

import edu.hws.jcm.awt.ExpressionInput;
import edu.hws.jcm.data.Function;
import edu.hws.jcm.data.Parser;
import edu.hws.jcm.data.Variable;

/**
 *  makoto 2010/05/18
 * 
 */

public class MjoFunctionSeries extends MjoXYSeries2 {
   
  private static final long serialVersionUID = 5937075174730430299L;

  //FunctiongetVal
    private static final double [] arrayForCalc = new double [1]; 
  
    //
    private Function function;
    
    private String funcName;
  
  
    public MjoFunctionSeries(String funcName, Comparable key){
  super(key);
  
  setFunction(funcName);
  setKey(funcName);
    }

    public String getFunctionName(){
  return funcName;
    }

    //
    public void setFunction(String funcName){
  this.funcName = funcName;

  //
  String modified = funcName.replaceAll("inv_dB\\(", "10^(0.1*");
  String modified2 = modified.replaceAll("dB\\(", "10*log10(");


  Parser parser = new Parser();
  Variable x = new Variable("x");
  parser.add(x);
  ExpressionInput input = new ExpressionInput(modified2, parser);
  function = input.getFunction(x);
    }

    //
    public boolean reload(){
  return false;
    }
  
    public double getValue(double x){
  arrayForCalc[0] = x;
  return function.getVal(arrayForCalc);
    }
  
    //IndexOutOfBound
    public int getItemCount(){
  return 0;
  
    }
  
}