Fix for wrong behavior of Json codec when record schema has no fields (#2833)
Co-authored-by: Thiruvalluvan M G <thiru@afer.com>
diff --git a/lang/c++/impl/parsing/JsonCodec.cc b/lang/c++/impl/parsing/JsonCodec.cc
index 4fd0481..a33fd39 100644
--- a/lang/c++/impl/parsing/JsonCodec.cc
+++ b/lang/c++/impl/parsing/JsonCodec.cc
@@ -496,6 +496,7 @@
template<typename P, typename F>
void JsonEncoder<P, F>::init(OutputStream &os) {
out_.init(os);
+ parser_.reset();
}
template<typename P, typename F>
diff --git a/lang/c++/impl/parsing/Symbol.hh b/lang/c++/impl/parsing/Symbol.hh
index 21e46a8..c8760c3 100644
--- a/lang/c++/impl/parsing/Symbol.hh
+++ b/lang/c++/impl/parsing/Symbol.hh
@@ -363,6 +363,10 @@
class SimpleParser {
Decoder *decoder_;
Handler &handler_;
+ /*
+ * parsingStack always has root at the bottom of it.
+ * So it is safe to call top() on it.
+ */
std::stack<Symbol> parsingStack;
static void throwMismatch(Symbol::Kind actual, Symbol::Kind expected) {
@@ -742,6 +746,14 @@
} else if (s.kind() == Symbol::Kind::SkipStart) {
parsingStack.pop();
skip(*decoder_);
+ } else if (s.kind() == Symbol::Kind::Indirect) {
+ ProductionPtr pp = s.extra<ProductionPtr>();
+ parsingStack.pop();
+ append(pp);
+ } else if (s.kind() == Symbol::Kind::Symbolic) {
+ ProductionPtr pp(s.extra<std::weak_ptr<Production>>());
+ parsingStack.pop();
+ append(pp);
} else {
break;
}
@@ -756,6 +768,8 @@
while (parsingStack.size() > 1) {
parsingStack.pop();
}
+ Symbol &s = parsingStack.top();
+ append(boost::tuples::get<0>(*s.extrap<RootInfo>()));
}
};
diff --git a/lang/c++/test/CodecTests.cc b/lang/c++/test/CodecTests.cc
index f24af3a..9c281c5 100644
--- a/lang/c++/test/CodecTests.cc
+++ b/lang/c++/test/CodecTests.cc
@@ -963,6 +963,11 @@
{R"({"type":"map", "values": "boolean"})",
"{c1sK5Bc2sK5BsK5B}", 2},
+ // Record with no fields
+ {"{\"type\":\"record\",\"name\":\"empty\",\"fields\":[]}",
+ "", 1},
+
+ // Single-field records
{"{\"type\":\"record\",\"name\":\"r\",\"fields\":["
"{\"name\":\"f\", \"type\":\"boolean\"}]}",
"B", 1},
@@ -1002,6 +1007,16 @@
"{\"name\":\"f7\", \"type\":\"bytes\"}]}",
"NBILFDS10b25", 1},
// record of records
+ {"{\"type\":\"record\",\"name\":\"r\",\"fields\":["
+ "{\"name\":\"f1\",\"type\":\"boolean\"},"
+ "{\"name\":\"f2\", \"type\":{\"type\":\"record\","
+ "\"name\":\"inner\",\"fields\":[]}}]}",
+ "B", 1},
+ {"{\"type\":\"record\",\"name\":\"r\",\"fields\":["
+ "{\"name\":\"f1\",\"type\":\"boolean\"},"
+ "{\"name\":\"f2\", \"type\":{\"type\":\"array\","
+ "\"items\":\"r\"}}]}",
+ "B[]", 1},
{"{\"type\":\"record\",\"name\":\"outer\",\"fields\":["
"{\"name\":\"f1\", \"type\":{\"type\":\"record\", "
"\"name\":\"inner\", \"fields\":["
