// Project: Patterns1
// Module: reusablesbjects
// Source code file Reusable.java
// Illustrate the Singleton software pattern.

import java.util.ArrayList;
public class Reusable {
    private int serialNum;
    private String description;
    private static int nextSerialNum = 1001;
    private static ArrayList<Reusable> reusables =
            new ArrayList<Reusable>( );

    private Reusable(String theDescription) {
        description = theDescription;
        serialNum = nextSerialNum++;
    }

    public int getSerialNum() {
        return serialNum;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String theDescription) {
        description = theDescription;
    }

    public static Reusable getInstance(String theDescription) {
        for(Reusable item : reusables) {
            if (item.getDescription( ).equals(theDescription)) {
                Reusable itemToReuse = item;
                reusables.remove(item);
                return itemToReuse;
            }
        }
        return new Reusable(theDescription);
    }

    public String toString( ) {
        return serialNum + " " + description;
    }

    public void recycle( ) {
        reusables.add(this);
    }
}