@@ -152,7 +152,7 @@ Java_org_apache_arrow_gandiva_evaluator_ExpressionRegistryJniHelper_getGandivaSu
     types::ExtGandivaType* gandiva_data_type = gandiva_data_types.add_datatype();
     ArrowToProtobuf(type, gandiva_data_type);
   }
-  auto size = gandiva_data_types.ByteSizeLong();
+  auto size = static_cast<int>(gandiva_data_types.ByteSizeLong());
   std::unique_ptr<jbyte[]> buffer{new jbyte[size]};
   gandiva_data_types.SerializeToArray(reinterpret_cast<void*>(buffer.get()), size);
   jbyteArray ret = env->NewByteArray(size);
@@ -181,7 +181,7 @@ Java_org_apache_arrow_gandiva_evaluator_ExpressionRegistryJniHelper_getGandivaSu
       ArrowToProtobuf(param_type, proto_param_type);
     }
   }
-  auto size = gandiva_functions.ByteSizeLong();
+  auto size = static_cast<int>(gandiva_functions.ByteSizeLong());
   std::unique_ptr<jbyte[]> buffer{new jbyte[size]};
   gandiva_functions.SerializeToArray(reinterpret_cast<void*>(buffer.get()), size);
   jbyteArray ret = env->NewByteArray(size);
 
@@ -63,3 +63,5 @@ add_arrow_test(dataset_jni_test
                jni_util.cc
                EXTRA_INCLUDES
                ${JNI_INCLUDE_DIRS})
+
+install(FILES jni_util.h DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/jni/dataset")
@@ -321,9 +321,9 @@ arrow::Result<jbyteArray> ToSchemaByteArray(JNIEnv* env,
       std::shared_ptr<arrow::Buffer> buffer,
       arrow::ipc::SerializeSchema(*schema, arrow::default_memory_pool()))
 
-  jbyteArray out = env->NewByteArray(buffer->size());
+  jbyteArray out = env->NewByteArray(static_cast<int>(buffer->size()));
   auto src = reinterpret_cast<const jbyte*>(buffer->data());
-  env->SetByteArrayRegion(out, 0, buffer->size(), src);
+  env->SetByteArrayRegion(out, 0, static_cast<int>(buffer->size()), src);
   return out;
 }
 
 
@@ -49,8 +49,8 @@ class JniPendingException : public std::runtime_error {
   explicit JniPendingException(const std::string& arg, jthrowable cause)
       : runtime_error(arg), cause_(cause) {}
 
-  const jthrowable GetCause() const { return cause_; }
-  const bool HasCause() const { return cause_ != nullptr; }
+  jthrowable GetCause() const { return cause_; }
+  bool HasCause() const { return cause_ != nullptr; }
 
  private:
   jthrowable cause_;
Original file line number	Diff line number	Diff line change
`@@ -152,7 +152,7 @@ Java_org_apache_arrow_gandiva_evaluator_ExpressionRegistryJniHelper_getGandivaSu`
`152`	`152`	`types::ExtGandivaType* gandiva_data_type = gandiva_data_types.add_datatype();`
`153`	`153`	`ArrowToProtobuf(type, gandiva_data_type);`
`154`	`154`	`}`
`155`		`- auto size = gandiva_data_types.ByteSizeLong();`
	`155`	`+ auto size = static_cast<int>(gandiva_data_types.ByteSizeLong());`
`156`	`156`	`std::unique_ptr<jbyte[]> buffer{new jbyte[size]};`
`157`	`157`	`gandiva_data_types.SerializeToArray(reinterpret_cast<void*>(buffer.get()), size);`
`158`	`158`	`jbyteArray ret = env->NewByteArray(size);`
`@@ -181,7 +181,7 @@ Java_org_apache_arrow_gandiva_evaluator_ExpressionRegistryJniHelper_getGandivaSu`
`181`	`181`	`ArrowToProtobuf(param_type, proto_param_type);`
`182`	`182`	`}`
`183`	`183`	`}`
`184`		`- auto size = gandiva_functions.ByteSizeLong();`
	`184`	`+ auto size = static_cast<int>(gandiva_functions.ByteSizeLong());`
`185`	`185`	`std::unique_ptr<jbyte[]> buffer{new jbyte[size]};`
`186`	`186`	`gandiva_functions.SerializeToArray(reinterpret_cast<void*>(buffer.get()), size);`
`187`	`187`	`jbyteArray ret = env->NewByteArray(size);`