mps/src/RS.java

   1 // this is the class to implement record store functionality
   2 // for MIDletPascal
   3 import javax.microedition.rms.*;
   4
   5 public class RS
   6 {
   7         // open record store
   8         public static RecordStore j(String name)
   9         {
  10                 try
  11                 {
  12                         return RecordStore.openRecordStore(name, true);
  13                 }
  14                 catch(Exception e)
  15                 {
  16                         return null;
  17                 }
  18         }
  19
  20
  21         // closes record store
  22         public static void L(RecordStore rs)
  23         {
  24                 try
  25                 {
  26                         rs.closeRecordStore();
  27                 }
  28                 catch(Exception e)
  29                 {
  30                 }
  31         }
  32
  33         // deletes a record store
  34         public static void L(String name)
  35         {
  36                 try
  37                 {
  38                         RecordStore.deleteRecordStore(name);
  39                 }
  40                 catch(Exception e)
  41                 {
  42                 }
  43         }
  44
  45         // deletes a record from a record store
  46         public static void L(RecordStore rs, int id)
  47         {
  48                 try
  49                 {
  50                         rs.deleteRecord(id);
  51                 }
  52                 catch(Exception e)
  53                 {
  54                 }
  55         }
  56
  57         // adds a record
  58         public static int L(RecordStore rs, String data)
  59         {
  60                 try
  61                 {
  62                         return rs.addRecord(data.getBytes(), 0, data.length());
  63                 }
  64                 catch(Exception e)
  65                 {
  66                         return -1;
  67                 }
  68         }
  69
  70         // sets a data in the entry
  71         public static void L(RecordStore rs, String data, int id)
  72         {
  73           try
  74                 {
  75                   rs.setRecord(id, data.getBytes(), 0, data.getBytes().length);
  76                 }
  77                 catch (Exception e)
  78                 {}
  79         }
  80
  81         // returns the next record ID
  82         public static int Lja(RecordStore rs)
  83         {
  84                 try
  85                 {
  86                         return rs.getNextRecordID();
  87                 }
  88                 catch (Exception e)
  89                 {
  90                         return -1;
  91                 }
  92         }
  93
  94         // read the data from the record store
  95         public static String j(RecordStore rs, int id)
  96         {
  97                 try
  98                 {
  99                         byte[] res;
 100                         res = rs.getRecord(id);
 101
 102                         if (res == null)
 103                                 return "";
 104
 105                         return new String(res);
 106                 }
 107                 catch(Exception e)
 108                 {
 109                         return "";
 110                 }
 111         }
 112
 113         // return the number of records in the record store
 114         public static int j(RecordStore rs)
 115         {
 116                 try
 117                 {
 118                         return rs.getNumRecords();
 119                 }
 120                 catch(Exception e)
 121                 {
 122                         return 0;
 123                 }
 124         }
 125 };