Mega Code Archive
Mixed Record Enumeration
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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
public class J2MEMixedRecordEnumerationExample extends MIDlet implements CommandListener {
private Display display;
private Alert alert;
private Form form = new Form("Mixed RecordEnumeration");
private Command exit = new Command("Exit", Command.SCREEN, 1);
private Command start = new Command("Start", Command.SCREEN, 1);
private RecordStore recordstore = null;
private RecordEnumeration recordEnumeration = null;
public J2MEMixedRecordEnumerationExample() {
display = Display.getDisplay(this);
form.addCommand(exit);
form.addCommand(start);
form.setCommandListener(this);
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command command, Displayable displayable) {
if (command == exit) {
destroyApp(true);
notifyDestroyed();
} else if (command == start) {
try {
recordstore = RecordStore.openRecordStore("myRecordStore", true);
byte[] outputRecord;
String outputString[] = { "First Record", "Second Record", "Third Record" };
int outputInteger[] = { 15, 10, 5 };
boolean outputBoolean[] = { true, false, true };
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
DataOutputStream outputDataStream = new DataOutputStream(outputStream);
for (int x = 0; x < 3; x++) {
outputDataStream.writeUTF(outputString[x]);
outputDataStream.writeBoolean(outputBoolean[x]);
outputDataStream.writeInt(outputInteger[x]);
outputDataStream.flush();
outputRecord = outputStream.toByteArray();
recordstore.addRecord(outputRecord, 0, outputRecord.length);
}
outputStream.reset();
outputStream.close();
outputDataStream.close();
StringBuffer buffer = new StringBuffer();
byte[] byteInputData = new byte[300];
ByteArrayInputStream inputStream = new ByteArrayInputStream(byteInputData);
DataInputStream inputDataStream = new DataInputStream(inputStream);
recordEnumeration = recordstore.enumerateRecords(null, null, false);
while (recordEnumeration.hasNextElement()) {
recordstore.getRecord(recordEnumeration.nextRecordId(), byteInputData, 0);
buffer.append(inputDataStream.readUTF());
buffer.append("\n");
buffer.append(inputDataStream.readBoolean());
buffer.append("\n");
buffer.append(inputDataStream.readInt());
buffer.append("\n");
alert = new Alert("Reading", buffer.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
inputStream.close();
recordstore.closeRecordStore();
if (RecordStore.listRecordStores() != null) {
RecordStore.deleteRecordStore("myRecordStore");
recordEnumeration.destroy();
}
} catch (Exception error) {
alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
}
}
}
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