/*
 * AbstractIFunction.java
 *
 * Created on February 18, 2004, 12:02 PM
 */
package hep.aida.ref.function;

import hep.aida.IModelFunction;
import hep.aida.IRangeSet;
import hep.aida.ref.Annotation;
import hep.aida.ref.ManagedObject;

import java.util.ArrayList;


/**
 * AbstractIFunction is implementation of the IFunction.
 * User has to implement "value" method.  
 * @author  serbo
 */
public abstract class AbstractIFunction extends ManagedObject implements IModelFunction, Cloneable, FunctionDispatcher {
    

    protected String[] variableNames;
    protected String[] parameterNames;
    protected String codeletString; 
    
    private Annotation annotation;
    private int dimension;
    private int numberOfParameters;
    private ArrayList listeners = new ArrayList();
    
    private RangeSet[] rangeSet;

    // chekanov. Changed from protected to public for simple scripting in Jython 
    public double[] p;
    public double[] gradient;
    
    /** No-argument constructor to be used for cloning.
     *  Created function can not be used directly
     */
    public AbstractIFunction() {
        super("");
        String className = this.getClass().getName();
        codeletString = "codelet:"+className+":classPath:";               
    }
    
    
    /** Creates a new instance of AbstractIFunction 
     *  with default variable names (x0, x1, ...) 
     *  and default parameter names (p0, p1, ...)
     */
    public AbstractIFunction(String title, int dimension, int numberOfParameters) {
        this();
        variableNames = new String[dimension];
        for (int i=0; i