package jsci.maths.wavelet.splines;

import jsci.maths.*;
import jsci.maths.wavelet.*;

/****************************************
* This class is used to generate sum of
* Diracs (splines of order 0) to be used
* as wavelets or related functions. It can
* also be used for basic interpolation.
* @author Daniel Lemire
*****************************************/
public class SumOfDiracs  extends Spline implements Filter, Cloneable   {
	protected final static int filtretype=-1;
	private double[] vecteur;
	/****************************************
  * This method is used to compute
  * how the number of scaling functions
  * changes from on scale to the other.
  * Basically, if you have k scaling
  * function and a Filter of type t, you'll
  * have 2*k+t scaling functions at the
  * next scale (dyadic case).
  * Notice that this method assumes
  * that one is working with the dyadic
  * grid while the method "previousDimension"
  * define in the interface "Filter" doesn't.
	******************************************/
	public int getFilterType () {
				return(filtretype);
	}

  /*******************************
  * Return a String representation
  * of the object
  ********************************/
  public String toString() {
    return(ArrayMath.toString(vecteur));
  }
  /*****************************************
  * Check if another object is equal to this
  * SumOfDiracs object
  ******************************************/
  public boolean equals(Object a) {
    if(a!=null && (a instanceof SumOfDiracs) && vecteur.length==((SumOfDiracs)a).dimension()) {
      SumOfDiracs iv=(SumOfDiracs)a;
        for(int i=0;ivecteur.length-1)) {
			throw new IllegalArgumentException("Incorrect parameters : "+i+", "+vecteur.length);
    }
    return(vecteur[i]);
  }
   /*********************************************
   * Set the sampled values of the function
   * to the specified array 
   **********************************************/
	public void setValues(double[] v) {
		vecteur=v;
	}

  /******************************************
  * Compute the mass (integral)
  * @param a left boundary of the interval
  * @param b right boundary of the interval
  **********************************************/
	public double mass(double a, double b) {
		double mass=0;
		for(int i=0;i