altosdroid: start restoring from log data on startup

[fw/altos] / altoslib / AltosFlightReader.java

diff --git a/altoslib/AltosFlightReader.java b/altoslib/AltosFlightReader.java
index c0565e8898d926a6320f43a1191d1d575aa8a019..be103838a2ccd683df7dd48f47c1d9a91a142b9d 100644 (file)
--- a/altoslib/AltosFlightReader.java
+++ b/altoslib/AltosFlightReader.java
@@ -21,16 +21,16 @@ import java.text.*;
 import java.io.*;
 import java.util.concurrent.*;
 
-public class AltosFlightReader {
+public abstract class AltosFlightReader {
        public String name;
 
        public int serial;
 
-       public void init() { }
+       public void init() {}
 
-       public AltosState read() throws InterruptedException, ParseException, AltosCRCException, IOException { return null; }
+       public abstract AltosState read() throws InterruptedException, ParseException, AltosCRCException, IOException;
 
-       public void close(boolean interrupted) { }
+       public abstract void close(boolean interrupted);
 
        public void set_frequency(double frequency) throws InterruptedException, TimeoutException { }