package lipeng;

import javax.microedition.rms.*;

public class LPSaveRecord
{
  private RecordStore rs;
  private String rsName;
  public LPSaveRecord(String name)
  {
    rsName=name;
    try
    {
      if(existRecordStore(name))
      {
        rs=RecordStore.openRecordStore(name,false);
      }
      else
      {
        rs=RecordStore.openRecordStore(name,true);
      }
    }
    catch(RecordStoreNotFoundException e)
    {
      System.out.println("Open Record Error");
      System.out.println(e.toString());
    }
    catch(Exception e)
    {
      System.out.println(e.toString());
    }
  }

  public void addRecord(byte[] rec)
  {
    try
    {
      rs.addRecord(rec,0,rec.length);
    }
    catch(Exception e)
    {
      System.out.println("Add Record Error");
      System.out.println(e.toString());
    }
  }

  public void close()
  {
    try
    {
      rs.closeRecordStore();
    }
    catch(Exception e)
    {
      System.out.println("Close Record Error");
      System.out.println(e.toString());
    }
  }

  public boolean IsEmpty()
  {
    try
    {
      if(rs.getNumRecords()>0)
      {
        return false;
      }
      else
      {
        return true;
      }
    }
    catch(Exception e)
    {
      System.out.println("Get Record Number Error");
      System.out.println(e.toString());
    }
    return true;
  }

  public void SetRecord(int recordId,byte[] buffer)
  {
    try
    {
      rs.setRecord(recordId,buffer,0,buffer.length);
    }
    catch(Exception e)
    {
      System.out.println("Set Record Error");
      System.out.println(e.toString());
    }
  }

  public byte[] getRecord(int recordId)
  {
    byte buffer[];
    try
    {
      buffer=rs.getRecord(recordId);
      return buffer;
    }
    catch(Exception e)
    {
      System.out.println("Get Record Error");
      System.out.println(e.toString());
    }
    return null;
  }

  public void removeAll()
  {
    try
    {
      rs.deleteRecordStore(rsName);
    }
    catch(Exception e)
    {
      System.out.println("Remove All Record Error");
      System.out.println(e.toString());
    }
  }

  private boolean existRecordStore(String recordName)
  {
    boolean existRs=true;
    RecordStore rsTemp=null;
    try
    {
      rsTemp=RecordStore.openRecordStore(recordName,false);
    }
    catch(Exception e)
    {
      existRs=false;
      System.out.println("Test Record Exist Error");
      System.out.println(e.toString());
    }
    finally
    {
      try
      {
        rsTemp.closeRecordStore();
      }
      catch(Exception e)
      {
        System.out.println("Close Record Error");
        System.out.println(e.toString());
      }
    }
    return existRs;
  }
}