davisusanibar commented on code in PR #34227:
URL: https://github.com/apache/arrow/pull/34227#discussion_r1154617627
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java/dataset/src/main/cpp/jni_wrapper.cc:
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@@ -261,6 +264,26 @@ void JNI_OnUnload(JavaVM* vm, void* reserved) {
default_memory_pool_id = -1L;
}
+/// Iterate over an object array of Tables Name on position `i` and theirs
+/// Memory Address representation on `i+1` position linearly.
+/// Return a mapping of the Table Name to Query as a Key and a
RecordBatchReader
+/// as a Value.
+std::unordered_map<std::string, std::shared_ptr<arrow::Table>>
ToMapTableToArrowReader(JNIEnv* env, jobjectArray& str_array) {
+ std::unordered_map<std::string, std::shared_ptr<arrow::Table>>
map_table_to_record_batch_reader;
+ int length = env->GetArrayLength(str_array);
+ std::shared_ptr<arrow::Table> output_table;
+ for (int pos = 0; pos < length; pos++) {
+ auto j_string_key =
reinterpret_cast<jstring>(env->GetObjectArrayElement(str_array, pos));
+ pos++;
+ auto j_string_value =
reinterpret_cast<jstring>(env->GetObjectArrayElement(str_array, pos));
+ auto* arrow_stream_in =
reinterpret_cast<ArrowArrayStream*>(std::stol(JStringToCString(env,
j_string_value)));
Review Comment:
This is internal evaluation, not exposed to the user to manipulate or setup
that. Instead of that if needed try/catch this errors from stol?
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