altoslib: Clean up AltosRecord clone methods

Make the AltosRecord version abstract and then implement suitable
versions in each subclass by creating copying constructors for each
class.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/altoslib/AltosRecordNone.java b/altoslib/AltosRecordNone.java
index ca0a5fe3..d4ea305f 100644
--- a/altoslib/AltosRecordNone.java
+++ b/altoslib/AltosRecordNone.java
@@ -28,6 +28,10 @@ public class AltosRecordNone extends AltosRecord {
 		super.copy(old);
 	}
 
+	public AltosRecordNone clone() {
+		return new AltosRecordNone(this);
+	}
+
 	public AltosRecordNone() {
 		super();
 	}