vibhatha commented on code in PR #43482:
URL: https://github.com/apache/arrow/pull/43482#discussion_r1700073503
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java/dataset/src/main/cpp/jni_wrapper.cc:
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@@ -368,28 +368,105 @@ std::shared_ptr<arrow::Buffer>
LoadArrowBufferFromByteBuffer(JNIEnv* env, jobjec
inline bool ParseBool(const std::string& value) { return value == "true" ?
true : false; }
+inline bool ParseChar(const std::string& value) {
+ if (value.size() != 1) {
+ JniThrow("Csv convert option " + value + " should be a char");
+ }
+ return value.at(0);
+}
+
/// \brief Construct FragmentScanOptions from config map
#ifdef ARROW_CSV
+
+bool SetCsvConvertOptions(arrow::csv::ConvertOptions& options, const
std::string& key,
+ const std::string& value) {
+ if (key == "column_types") {
+ int64_t schema_address = std::stol(value);
+ ArrowSchema* c_schema = reinterpret_cast<ArrowSchema*>(schema_address);
+ auto schema = JniGetOrThrow(arrow::ImportSchema(c_schema));
+ auto& column_types = options.column_types;
+ for (auto field : schema->fields()) {
+ column_types[field->name()] = field->type();
+ }
+ } else if (key == "strings_can_be_null") {
+ options.strings_can_be_null = ParseBool(value);
+ } else if (key == "check_utf8") {
+ options.check_utf8 = ParseBool(value);
+ } else if (key == "null_values") {
+ options.null_values = {value};
+ } else if (key == "true_values") {
+ options.true_values = {value};
+ } else if (key == "false_values") {
+ options.false_values = {value};
+ } else if (key == "quoted_strings_can_be_null") {
+ options.quoted_strings_can_be_null = ParseBool(value);
+ } else if (key == "auto_dict_encode") {
+ options.auto_dict_encode = ParseBool(value);
+ } else if (key == "auto_dict_max_cardinality") {
+ options.auto_dict_max_cardinality = std::stoi(value);
+ } else if (key == "decimal_point") {
+ options.decimal_point = ParseChar(value);
+ } else if (key == "include_missing_columns") {
+ options.include_missing_columns = ParseBool(value);
+ } else {
+ return false;
+ }
+ return true;
+}
+
+bool SetCsvParseOptions(arrow::csv::ParseOptions& options, const std::string&
key,
+ const std::string& value) {
+ if (key == "delimiter") {
+ options.delimiter = ParseChar(value);
+ } else if (key == "quoting") {
+ options.quoting = ParseBool(value);
+ } else if (key == "quote_char") {
+ options.quote_char = ParseChar(value);
+ } else if (key == "double_quote") {
+ options.double_quote = ParseBool(value);
+ } else if (key == "escaping") {
+ options.escaping = ParseBool(value);
+ } else if (key == "escape_char") {
+ options.escape_char = ParseChar(value);
+ } else if (key == "newlines_in_values") {
+ options.newlines_in_values = ParseBool(value);
+ } else if (key == "ignore_empty_lines") {
+ options.ignore_empty_lines = ParseBool(value);
+ } else {
+ return false;
+ }
+ return true;
+}
+
+bool SetCsvReadOptions(arrow::csv::ReadOptions& options, const std::string&
key,
+ const std::string& value) {
+ if (key == "use_threads") {
+ options.use_threads = ParseBool(value);
+ } else if (key == "block_size") {
+ options.block_size = std::stoi(value);
+ } else if (key == "skip_rows") {
+ options.skip_rows = std::stoi(value);
+ } else if (key == "skip_rows_after_names") {
+ options.skip_rows_after_names = std::stoi(value);
+ } else if (key == "autogenerate_column_names") {
+ options.autogenerate_column_names = ParseBool(value);
+ } else {
+ return false;
+ }
+ return true;
+}
+
arrow::Result<std::shared_ptr<arrow::dataset::FragmentScanOptions>>
ToCsvFragmentScanOptions(const std::unordered_map<std::string, std::string>&
configs) {
std::shared_ptr<arrow::dataset::CsvFragmentScanOptions> options =
std::make_shared<arrow::dataset::CsvFragmentScanOptions>();
- for (auto const& [key, value] : configs) {
- if (key == "delimiter") {
- options->parse_options.delimiter = value.data()[0];
- } else if (key == "quoting") {
- options->parse_options.quoting = ParseBool(value);
- } else if (key == "column_types") {
- int64_t schema_address = std::stol(value);
- ArrowSchema* c_schema = reinterpret_cast<ArrowSchema*>(schema_address);
- ARROW_ASSIGN_OR_RAISE(auto schema, arrow::ImportSchema(c_schema));
- auto& column_types = options->convert_options.column_types;
- for (auto field : schema->fields()) {
- column_types[field->name()] = field->type();
- }
- } else if (key == "strings_can_be_null") {
- options->convert_options.strings_can_be_null = ParseBool(value);
- } else {
+ for (const auto& it : configs) {
Review Comment:
Could we try something like `for (const auto& [key, value] : configs)`?
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