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-rw-r--r--java/src/json/ext/Generator.java16
1 files changed, 9 insertions, 7 deletions
diff --git a/java/src/json/ext/Generator.java b/java/src/json/ext/Generator.java
index ecceb27..bb3a394 100644
--- a/java/src/json/ext/Generator.java
+++ b/java/src/json/ext/Generator.java
@@ -1,8 +1,7 @@
/*
* This code is copyrighted work by Daniel Luz <dev at mernen dot com>.
*
- * Distributed under the Ruby and GPLv2 licenses; see COPYING and GPL files
- * for details.
+ * Distributed under the Ruby license: https://www.ruby-lang.org/en/about/license.txt
*/
package json.ext;
@@ -428,11 +427,14 @@ public final class Generator {
new Handler<IRubyObject>() {
@Override
RubyString generateNew(Session session, IRubyObject object) {
- IRubyObject result =
- object.callMethod(session.getContext(), "to_json",
- new IRubyObject[] {session.getState()});
- if (result instanceof RubyString) return (RubyString)result;
- throw session.getRuntime().newTypeError("to_json must return a String");
+ if (object.respondsTo("to_json")) {
+ IRubyObject result = object.callMethod(session.getContext(), "to_json",
+ new IRubyObject[] {session.getState()});
+ if (result instanceof RubyString) return (RubyString)result;
+ throw session.getRuntime().newTypeError("to_json must return a String");
+ } else {
+ return OBJECT_HANDLER.generateNew(session, object);
+ }
}
@Override