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Android: Add string EValue input support in JNI execute path #19526

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Android: Add string EValue input support in JNI execute path #19526

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Android: Add string EValue input support in JNI execute path
psiddh May 12, 2026
f19e1a2
Add null string guard and unsupported type code error path
psiddh May 12, 2026
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13 changes: 13 additions & 0 deletions extension/android/jni/jni_layer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -363,6 +363,8 @@ class ExecuTorchJni : public facebook::jni::HybridClass<ExecuTorchJni> {

std::vector<EValue> evalues;
std::vector<TensorPtr> tensors;
std::vector<std::unique_ptr<std::string>> strings;
std::vector<std::unique_ptr<executorch::aten::ArrayRef<char>>> string_refs;

static const auto typeCodeField =
JEValue::javaClassStatic()->getField<jint>("mTypeCode");
Expand All @@ -373,6 +375,17 @@ class ExecuTorchJni : public facebook::jni::HybridClass<ExecuTorchJni> {
if (typeCode == JEValue::kTypeCodeTensor) {
tensors.emplace_back(JEValue::JEValueToTensorImpl(jevalue));
evalues.emplace_back(tensors.back());
} else if (typeCode == JEValue::kTypeCodeString) {
static const auto toStrMethod =
JEValue::javaClassStatic()
->getMethod<facebook::jni::local_ref<jstring>()>("toStr");
auto jstr = toStrMethod(jevalue);
auto str = std::make_unique<std::string>(jstr->toStdString());
auto ref = std::make_unique<executorch::aten::ArrayRef<char>>(
str->data(), str->size());
evalues.emplace_back(ref.get());
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strings.push_back(std::move(str));
string_refs.push_back(std::move(ref));
} else if (typeCode == JEValue::kTypeCodeInt) {
static const auto toIntMethod =
JEValue::javaClassStatic()->getMethod<jlong()>("toInt");
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