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

class RRtable
{
  private String Abbrev;
  private String Name;
  private Vector Rows;
  private int Rowcount;
  private int Maxver;
    protected Database TheSchema;
    
  RRtable(Database mySchema)
  {
    Abbrev = "RR";
    Name = "RowRelations";
    Rowcount = 0;
    Rows = new Vector(1);
    TheSchema = mySchema;
  }

  public String getName()
  {
    return Name;
  }

  public String getAbbrev()
  {
    return Abbrev;
  }

  public int getRowcount()
  {
    return Rowcount;
  }
  
  public RR getFirstRow()
  {
        if( Rows.isEmpty() )
            return null;
    return (RR)Rows.firstElement();
  }

  public RR getLastRow()
  {
        if( Rows.isEmpty() )
            return null;
    return (RR)Rows.lastElement();
  }

  public RR getNextRow(RR thisrow)
  {
        if( Rows.isEmpty() )
            return null;
    if( Rows.indexOf( thisrow ) == ( Rows.size() - 1 ) )
      return null;

    return (RR)Rows.elementAt( Rows.indexOf( thisrow ) + 1 );
  }

  public RR getPrevRow(RR thisrow)
  {
        if( Rows.isEmpty() )
            return null;
    if( Rows.indexOf( thisrow ) == 0 )
      return null;

    return (RR)Rows.elementAt( Rows.indexOf( thisrow ) - 1 );
  }

  public void insertRow(RR newRow)
  {
    int i;
    Enumeration enum = Rows.elements();

    newRow.setTable(this);

    if( newRow.getPkid() == null ) {
          String keystr;
          DecimalFormat twoDigits = new DecimalFormat( "00" );
          DecimalFormat fourDigits = new DecimalFormat( "0000" );
    
          keystr = getAbbrev();
          keystr += twoDigits.format(1);
          keystr += fourDigits.format(Rowcount + 1);

          Key newRowKey = new Key(keystr, TheSchema);
          newRow.setPkid(newRowKey);
    }


    for( i = 0; i < Rows.size(); ++i ) {
      RR currRow = (RR)Rows.elementAt(i);
      if( currRow.getPkid().getValue() >= newRow.getPkid().getValue() )
        break;
    }



    Rows.insertElementAt(newRow, i);
    Rowcount++;
    if( newRow.getPkid().getVersion() > Maxver )
      Maxver = newRow.getPkid().getVersion();
  }

    public void removeRow(RC oldrow)
    {
        Rows.removeElement(oldrow);
    }

    public void dumpTable(BufferedWriter output) throws IOException
    {
        for( RR curr = getFirstRow();
        	   curr != null;
        	   curr = getNextRow(curr)) {
            curr.dumpRow(output);
        }
    }



    public Database getTheSchema()
    {
        return TheSchema;
    }

    public void setTheSchema(Database value)
    {
        TheSchema = value;
    }


  public static void main(String[] args)
  {
      // RRtable theTable = new RRtable();
      // RR row1 = new RR();
    // Populate rows here
    // theTable.insertRow(row1);

    //    for( RR curr = theTable.getFirstRow();
    //     curr != null;
    //     curr = theTable.getNextRow(curr)) {
      //  System.out.println(curr);
    // }

  }
}