package com.cuilichen.usual;

import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;

public class RMS ...{
public static final int Int1 = 0;//各个字段的默认数值 
public static final int Int2 = 0;
public static final long Long1 = 0;
public static final String Str1 = "";
public static final String Str2 = "";
public static final String Str3 = "";

public static boolean addRecord(String name, int int1, int int2,//添加记录 
long long1, String str1, String str2, String str3, boolean b) ...{
boolean success = false;

try ...{
RecordStore rs = RecordStore.openRecordStore(name, true);
Appointment app = new Appointment(int1, int2, long1, str1, str2,str3, b);
//既然str1作为保留字段，我们在这里就要如此操作：例如int1为我们设定的关键字，那么str1 = Integer.toString(int1); 
byte[] data = app.toBytes();
rs.addRecord(data, 0, data.length);
rs.closeRecordStore();
success = true;
} catch (Exception e) ...{
e.printStackTrace();
}
return success;
}
public static int getNumOfRecords(String name) ...{//得到RMS中记录的条数 
try ...{
RecordStore rs = RecordStore.openRecordStore(name, true);

return rs.getNumRecords();
} catch (Exception e) ...{
return 0;
}
}

public static Appointment[] getRecords(String name) ...{//取得RMS中的所有记录 
Appointment[] result = ...{ };

try ...{
RecordStore rs = RecordStore.openRecordStore(name, false);
RecordEnumeration re = rs.enumerateRecords(null, null, false);
result = new Appointment[rs.getNumRecords()];

for (int i = 0; i < result.length; i++) ...{
int j = re.previousRecordId();
Appointment app = new Appointment(rs.getRecord(j));
result = app;

//System.out.println("app["+i+"] "+app.getStr2()); 
}

rs.closeRecordStore();
} catch (Exception e) ...{
}

return result;
}

public static Appointment getRecord(String name, int j) ...{//根据记录编号（参数 int j）取得一条记录 
Appointment result = new Appointment();

try ...{
RecordStore rs = RecordStore.openRecordStore(name, false);
RecordEnumeration re = rs.enumerateRecords(null, null, false);
result = new Appointment(rs.getRecord(j));
rs.closeRecordStore();
} catch (Exception e) ...{
}

return result;
}

public static int getIndex(String name, String content) ...{//得到记录号int j，这里需要使用保留字段str1 
RecordStore rs = null;
RecordEnumeration re = null;

try ...{
rs = RecordStore.openRecordStore(name, false); //open 
re = rs.enumerateRecords(null, null, false); //enumeration 

for (int i = 0; i < RMS.getNumOfRecords(name); i++) ...{
int j = re.nextRecordId();
Appointment app = new Appointment(rs.getRecord(j));

if (app.getStr1().equals(content)) ...{
return j;
}
}
} catch (Exception e) ...{
}
return 1;
}

public static boolean setRecord(String name, int id, int int1, int int2,//设置记录号为id的记录 
long long1, String str1, String str2, String str3, boolean b) ...{
boolean success = false;
RecordStore rs = null;
RecordEnumeration re = null;

try ...{
rs = RecordStore.openRecordStore(name, false); //open 
re = rs.enumerateRecords(null, null, false); //enumeration 

Appointment app = new Appointment(int1, int2, long1, str1, str2, str3, b);
//str1作为保留字段，在这里如此操作：例如若int1为我们设定的关键字，那么str1 = Integer.toString(int1); 

byte[] data = app.toBytes();
rs.setRecord(id, data, 0, data.length);
success = true;
rs.closeRecordStore();
} catch (Exception e) ...{
}

return success;
}
}

protected void startApp() throws MIDletStateChangeException ...{
if (RMS.getNumOfRecords(rsName) = = 0) ...{//rsName在前面已经声明了。String rsName＝“MyRMS”； 
for (int i = 0; i <6; i++) ...{
RMS.addRecord(rsName, RMS.Int1, i, RMS.Long1, Integer . toString(i), RMS.Str2, "1234567890123456789",false);
}
}它就在RMS中增加了6条记录，其中int1，long1，str2，WroteFlag都没有使用，我们只是使用int2，str1（作为保留字段）和str3。
}