altoslib: Switch preserved state format to JSON

This is much easier to debug than the icky strings with backslashes everywhere.

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

1 files changed, 16 insertions, 0 deletions

diff --git a/altoslib/AltosPreferencesBackend.java b/altoslib/AltosPreferencesBackend.java
index 9131ad39..d4c3d7e5 100644
--- a/altoslib/AltosPreferencesBackend.java
+++ b/altoslib/AltosPreferencesBackend.java
@@ -50,6 +50,22 @@ public abstract class AltosPreferencesBackend {
 		putString(key, h.toString());
 	}
 
+	public AltosJson	getJson(String key) {
+		String	value = getString(key, null);
+
+		if (value == null)
+			return null;
+		try {
+			return AltosJson.fromString(value);
+		} catch (IllegalArgumentException ie) {
+			return null;
+		}
+	}
+
+	public void	       	putJson(String key, AltosJson j) {
+		putString(key, j.toString());
+	}
+
 	public abstract boolean nodeExists(String key);
 	public abstract AltosPreferencesBackend node(String key);