import Worker;
import java.lang.*;

/**
* This class encodes Database requests that the GUI will pass to the TCP/IP.
* @version 1.0
* @author Graham Gelling
* @author Heather Cougar
* @author Thomas Barnhart
* @date 04-26-99
 * $Id: GUIEncoder.java,v 1.4 1999/05/10 01:47:20 barnhart Exp $
*/
 
public class GUIEncoder {


  /**
  *This methods encodes a request for information as a string.
  *pre: Parameters are properly initialized.
  *post: the initial data and fieldname are not changed
  *post: String returned in format 
  *"listByField1\nobjectType\nfieldname\npattern"
  */
  
    public String listByField(int objectType, String fieldName, String pattern)
    {
        String str = new String();
        String str2 = new String();
        str = "listByField1";
        str = str.concat("\n");
        str = str.concat(str2.valueOf(objectType));
        str = str.concat("\n");
        str = str.concat(fieldName);
        str = str.concat("\n");
        str = str.concat(pattern);
        return str;
    }//listByField(int, String, String)

    /**
     *This methods encodes a request for information as a string.
     *pre: Parameters are properly initialized.
     *post: the initial data and fieldname are not changed
     *post: String returned in format 
     *"listByField2\nobjectType\nfieldname\npattern\noptional"
     */

    public String listByField(int objectType, String fieldName, String pattern
                              , String optional){
        String str = new String();
        String str2 = new String();
        str = "listByField2";
        str = str.concat("\n");
        str = str.concat(str2.valueOf(objectType));
        str = str.concat("\n");
        str = str.concat(fieldName);
        str = str.concat("\n");
        str = str.concat(pattern);
        str = str.concat("\n");
        str = str.concat(optional);
        return str;
    }//listByField(int, String String String)

    /**
     *This methods encodes a request for all information as a string.
     *pre: Parameters are properly initialized.
     *post: the initial data and fieldname are not changed
     *post: String returned in format 
     *"listAll\nobjectType\nfieldname"
     */
    
    public String listAll(int objectType, String fieldName){
        String str = new String();
        String str2 = new String();
        str = "listAll";
        str = str.concat("\n");
        str = str.concat(str2.valueOf(objectType));
        str = str.concat("\n");
        str = str.concat(fieldName);
        return str;
    }//listAll

    /**
     *This methods encodes a request for a DatabaseEntry as a string.
     *pre: Parameters are properly initialized.
     *post: the initial data and fieldname are not changed
     *post: String returned in format 
     *"lookup\nkey"
     */

    public String lookup(String key){
        String str = new String();
        str = "lookUp";
        str = str.concat("\n");
        str = str.concat(key);
        return str;
    }//lookup

    /**
     *These methods encodes an update to the Database as a string.
     *pre: Parameters are properly initialized.
     *post: the initial data and fieldname are not changed
     *post: String returned in format 
     *"update\n...data..."
     */

    public String update2(Artist newValues)
        throws Exception{
        String str = new String();
        Worker marx = new Worker();
        str = "update2";
        str = str.concat("\n");
        str = str.concat(marx.artistToString(newValues));
        return str;
    }//update(Artist)

    public String update1(Art newValues){
        String str = new String();
        Worker marx = new Worker();
        str = "update1";
        str = str.concat("\n");
        str = str.concat(marx.artToString(newValues));
        return str;
    }//update(Art)
    
    public String update3(Bidder newValues){
        String str = new String();
        Worker marx = new Worker();
        str = "update3";
        str = str.concat("\n");
        str = str.concat(marx.bidderToString(newValues));
        return str;
    }//update(Bidder)

    /**
     *This methods encodes an addition to the Database as a string.
     *pre: Parameters are properly initialized.
     *post: the initial data and fieldname are not changed
     *post: String returned in format 
     *"add\nobjectType\n...data..."
     */

    public String add(int objectType, DatabaseEntry newObject) throws Exception{
        String str = new String();
        Worker lenin = new Worker();
        str = "add";
        str = str.concat("\n");
        switch(objectType){
        case 2:
            str = str.concat("2");
            str = str.concat("\n");
            str = str.concat(lenin.artToString((Art)newObject));
            break;
        case 11:
            str = str.concat("11");
            str = str.concat("\n");
            str = str.concat(lenin.artistToString((Artist)newObject));
            break;
        case 12:
            str = str.concat("12");
            str = str.concat("\n");
            str = str.concat(lenin.bidderToString((Bidder)newObject));
            break;
        }//switch
        return str;
    }//add
  
}//public class GUIEncoder