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, 5 insertions, 3 deletions

diff --git a/altoslib/AltosRecordTM.java b/altoslib/AltosRecordTM.java
index 9530be31..f6ed4966 100644
--- a/altoslib/AltosRecordTM.java
+++ b/altoslib/AltosRecordTM.java
@@ -149,9 +149,7 @@ public class AltosRecordTM extends AltosRecord {
 	}
 
 	public AltosRecordTM clone() {
-		AltosRecordTM	n = (AltosRecordTM) super.clone();
-		n.copy(this);
-		return n;
+		return new AltosRecordTM(this);
 	}
 
 	void make_missing() {
@@ -177,6 +175,10 @@ public class AltosRecordTM extends AltosRecord {
 		make_missing();
 	}
 
+	public AltosRecordTM(AltosRecordTM old) {
+		copy(old);
+	}
+	
 	public AltosRecordTM() {
 		super();
 		make_missing();