emkornfield commented on a change in pull request #7030: URL: https://github.com/apache/arrow/pull/7030#discussion_r414984380
########## File path: cpp/src/jni/dataset/jni_wrapper.cpp ########## @@ -0,0 +1,577 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include <arrow/dataset/file_base.h> +#include <arrow/dataset/api.h> +#include <arrow/filesystem/localfs.h> +#include <arrow/ipc/api.h> +#include <arrow/util/iterator.h> +#include <arrow/filesystem/hdfs.h> +#include <arrow/io/api.h> +#include <google/protobuf/io/coded_stream.h> +#include <google/protobuf/message.h> +#include "concurrent_map.h" +#include "arrow/compute/kernel.h" +#include "arrow/compute/kernels/cast.h" +#include "arrow/compute/kernels/compare.h" +#include "jni/dataset/Types.pb.h" + +#include "org_apache_arrow_dataset_jni_JniWrapper.h" +#include "org_apache_arrow_dataset_file_JniWrapper.h" + +static jclass illegal_access_exception_class; +static jclass illegal_argument_exception_class; +static jclass runtime_exception_class; + +static jclass record_batch_handle_class; +static jclass record_batch_handle_field_class; +static jclass record_batch_handle_buffer_class; + +static jmethodID record_batch_handle_constructor; +static jmethodID record_batch_handle_field_constructor; +static jmethodID record_batch_handle_buffer_constructor; + +static jint JNI_VERSION = JNI_VERSION_1_6; + +using arrow::jni::ConcurrentMap; + +static ConcurrentMap<std::shared_ptr<arrow::dataset::DatasetFactory>> dataset_factory_holder_; +static ConcurrentMap<std::shared_ptr<arrow::dataset::Dataset>> dataset_holder_; +static ConcurrentMap<std::shared_ptr<arrow::dataset::ScanTask>> scan_task_holder_; +static ConcurrentMap<std::shared_ptr<arrow::dataset::Scanner>> scanner_holder_; +static ConcurrentMap<std::shared_ptr<arrow::RecordBatchIterator>> iterator_holder_; +static ConcurrentMap<std::shared_ptr<arrow::Buffer>> buffer_holder_; + +#define JNI_ASSIGN_OR_THROW_NAME(x, y) ARROW_CONCAT(x, y) Review comment: I don't think these macros are necessary. you should be able to use a normal (templated) function since you throw an exception instead of return. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
