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Property.toJSONObject drops defaults when there are no local entries #1086
Description
Property.toJSONObject loses inherited defaults when the Properties instance has no local entries. Adding an unrelated local property makes the same defaults appear.
The isEmpty() check only examines local entries, whereas propertyNames() and getProperty() include the defaults chain.
import java.util.Properties;
import org.json.Property;
public class Reproduce {
public static void main(String[] args) {
Properties defaults = new Properties();
defaults.setProperty("timeout", "30");
Properties config = new Properties(defaults);
System.out.println("getProperty=" + config.getProperty("timeout"));
System.out.println("defaults only=" + Property.toJSONObject(config));
config.setProperty("host", "localhost");
System.out.println("with unrelated override=" + Property.toJSONObject(config));
}
}Output:
getProperty=30
defaults only={}
with unrelated override={"host":"localhost","timeout":"30"}
Reproduced with 20260814 and master at 18e8ef6 on Java 21.
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