import java.util.*;
import java.text.DecimalFormat;
import java.io.*;

/**
 * Teacher Tab
 * @author Genjava v1.0
 */

public class TE extends RC implements Serializable
{
    protected String name;
    protected TEtable Table;
    protected Database Schema;
    public RS RSid_fcp;
    public RS RSid_bcp;


    TE(String rowbuffer, Database mySchema)
    {
        String buffer;
        StringTokenizer tokens =
            new StringTokenizer( rowbuffer );

        buffer = tokens.nextToken();
        pkid = new Key(buffer, mySchema);

        buffer = tokens.nextToken("\r\n");
        name = buffer.trim();

        Schema = mySchema;
        Table = mySchema.TEtab;
    }


    TE()
    {
    }


    /**
     * Retrieves the value of <code>name</code>
     */

    public String getname()
    {
        return name;
    }


    /**
     * Sets the value of <code>name</code>
     */

    public void setname(String value)
    {
        name = value;
    }


    /**
     * Retrieves a reference to the TEtable
     */

    public TEtable getTable()
    {
        return Table;
    }


    /**
     * Sets the reference to the TEtable
     */

    public void setTable(TEtable value)
    {
        Table = value;
    }


    /**
     * Retrieves a reference to the global schema
     */

    public Database getSchema()
    {
        return Schema;
    }


    /**
     * Modifies the reference to the global schema
     */

    public void setSchema(Database value)
    {
        Schema = value;
    }


    /**
     * Adds this <code>TE</code> to its <code>Table</code>    * and links it to its parents and siblings
     */
    public void addRow()
    {
        if( Table.insertRow(this) )
            linkRow();
    }


    /**
     * Removes this <code>TE</code> from its <code>Table</code>    * and unlinks it from its parents and siblings
     */
    public void deleteRow()
    {
        if( Table.removeRow(this) )
            unlinkRow();
    }


    /**
     * Links this <code>TE</code>  to all of it's related tables
     */

    public void linkRow()
    {

        // Locals for parent tables

        // Locals for child tables
        RS RSctemp;
        RS RSccurr;
        // This loop basically implements link_child_bp_m

        for( RSccurr = Schema.RStab.getFirstRow();
             RSccurr != null;
             RSccurr  = Schema.RStab.getNextRow(RSccurr) ) {
               if( RSccurr.getTEid().compare(pkid) == 0 ) {
                RSccurr.TEid_pp = this;
                RSctemp = RSid_bcp;
                RSid_bcp = RSccurr;
                RSccurr.TEid_fpp = this;
                if ( RSid_fcp == null ) {
                    RSid_fcp = RSccurr;
                    RSccurr.TEid_bpp = this;
                }
                else {
                    RSccurr.TEid_bpp = RSctemp;
                    RSctemp.TEid_fpp = RSccurr;
                } // End else
            } // End if ==
        } // End for
    }


    /**
     * Unlinks this <code>TE</code>  from all of it's related tables
     */

    public void unlinkRow()
    {

        // Locals for parent tables

        // Locals for child tables
        RC RCtemp;
        RC RCtemp2;

        RCtemp = RSid_fcp;
        while( ( RCtemp != null ) && ( RCtemp != this ) ) {
            RCtemp2 = ((RS)RCtemp).TEid_fpp;
            ((RS)RCtemp).TEid_bpp = ((RS)RCtemp).TEid_pp =
                ((RS)RCtemp).TEid_pp = null;
            RCtemp = RCtemp2;
        }
    }


    /**
     * Writes this <code>TE</code> to a given BufferedWriter
     */
    public void dumpRow(BufferedWriter output) throws IOException
    {
        output.write(this.toString());
        output.newLine();
        output.flush();
    }


    public String toString()
    {
        return pkid + " " + name;
    }
}