/* CityEntry.java 1.1                        */
/* by Sharon Tuttle                          */
/* last modified: 2-27-03                    */
/*                (now implements Comparable)*/

abstract class CityEntry implements Comparable
{
    /*------------------------------------
     fields
     -------------------------------------*/
     
    private String name;
    private String address;
    private String phone;
     
    /*-------------------------------------
     accessors
     --------------------------------------*/
    String getName()
    {
       return this.name;
    }
    
    String getAddress()
    {
        return this.address;
    }
    
    String getPhone()
    {
        return this.phone;
    }
    
    /*---------------------------------------
     modifiers
     ------------------------------------------*/
    void setName(String nm)
    {
        this.name = nm;
    }
    
    void setAddress(String addr)
    {
        this.address = addr;
    }
    
    void setPhone(String ph)
    {
        this.phone = ph;
    }
    
    /*------------------------------------------------
     abstract methods
     (any subclass MUST provide an implementation of!)
    --------------------------------------------------*/
    abstract String specialToString();
    abstract String specialGetPhone();   
    
    /*-----------------------------------------------------------
     implementations of interface's abstract methods
    --------------------------------------------------------------*/
    // remember, I want to compare a CityEntry to another CityEntry...
    public int compareTo(Object obj)
    {
        CityEntry entryToCompare = (CityEntry) obj;

        // what's the name in the passed entryToCompare?
        String nameToCompare = entryToCompare.getName();

        return ( (this.name).compareTo(nameToCompare) );
    }
    
    
    /*--------------------------------------
     other methods
     ---------------------------------------*/
    
    /*-----------------------------------------------------
     isABusiness
     Purpose: returns true if this item of type
     CityEntry is a BusinessEntry object --- returns
     false otherwise.
     
     (also serves as a simple example of Java's instanceOf
     operator)
    -----------------------------------------------------*/
    boolean isABusiness()
    {
        if (this instanceof BusinessEntry)
        {
            return true;
        }
        else
        {
            return false;
        }
    }  
}