package shipwar;

import javax.microedition.lcdui.*;
import javax.microedition.rms.*;

public class CheckOperate extends Alert implements CommandListener{
    private Command Ensure=new Command("確定",Command.ITEM,1);
    private Command Return=new Command("返回",Command.EXIT,5);
    private Displayable upinstance,up2instance;
    public CheckOperate(Displayable upinstance,Displayable up2instance){
        super("提示信息");
        this.setString("確定要清空記錄？");
        this.setTimeout(Alert.FOREVER);
        this.upinstance=upinstance;
        this.up2instance=up2instance;
        this.addCommand(Ensure);
        this.addCommand(Return);
        this.setCommandListener(this);
    }

    public void commandAction(Command c,Displayable d){
        if(c==Return)
            Display.getDisplay(shipwarMIDlet.shipwarmidlet).setCurrent(upinstance);
        else if(c==Ensure){
            NameComparator namecom=new NameComparator();
            RecordEnumeration re=null;
            try{
                re=MainMenu.rs.enumerateRecords(null,namecom,true);
                int id;
                while(re.hasNextElement()){
                    id=re.nextRecordId();
                    MainMenu.rs.deleteRecord(id);
                }
            }catch(Exception e){
                    System.out.println("全部刪除出錯");
            }
            Alert a=new Alert("提示信息");
            a.setString("清除記錄成功");
            a.setTimeout(2000);
            Display.getDisplay(shipwarMIDlet.shipwarmidlet).setCurrent(a,up2instance);
        }
    }
}