chainedfactory.java

jooneDTE的源码

/*
 * ChainedFactory.java
 *
 * Created on 11 luglio 2004, 21.26
 */

package org.joone.dte.factory;
import java.util.*;
import org.joone.dte.TaskFactory;
import org.joone.net.NeuralNet;

/**
 * This TaskFactory calls in sequence all the TaskFactory objects 
 * contained in the Chain parameter, and returns the sum of 
 * the generated tasks. 
 * @author  paolo
 */
public class ChainedFactory implements TaskFactory {
    private ArrayList chain;
    private int currElem;
    
    /** Creates a new instance of ChainedFactory */
    public ChainedFactory() {
        chain = new ArrayList();
    }
    
    public void initialize() {
        currElem = 0;
        for (int i=0; i < chain.size(); ++i) {
            TaskFactory fact = (TaskFactory)chain.get(i);
            fact.initialize();
        }
    }
    
    /**
     * Getter for property chain.
     * @return Value of property chain.
     */
    public ArrayList getChain() {
        return chain;
    }
    
    /**
     * Setter for property chain.
     * Used to fill the internal list of TaskFactory object to call in sequence
     * @param chain an ArrayList of taskFactory objects
     */
    public void setChain(ArrayList chain) {
        this.chain = chain;
    }
    
    public org.joone.net.NeuralNet getNextTask() {
        if ((chain == null) || (chain.size() == 0))
            return null;
        NeuralNet nnet = null;
        while ((nnet == null) && (currElem < chain.size())) {
            TaskFactory fact = (TaskFactory)chain.get(currElem);
            nnet = fact.getNextTask();
            if (nnet == null)
                // the current TaskFactory has finished; we take the next one
                ++currElem; 
        }
        return nnet;
    }
    
    public int getTotTasks() {
        if ((chain == null) || (chain.size() == 0))
            return 0;
        int sum = 0;
        for (int i=0; i < chain.size(); ++i) {
            TaskFactory fact = (TaskFactory)chain.get(i);
            sum += fact.getTotTasks();
        }
        return sum;
    }
    
}