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// 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.
void print_array(GArrow.Array array) {
stdout.printf("[");
var n = array.get_length();
switch (array.get_value_type()) {
case GArrow.Type.UINT8:
var concrete_array = array as GArrow.UInt8Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%hhu", concrete_array.get_value(i));
}
break;
case GArrow.Type.UINT16:
var concrete_array = array as GArrow.UInt16Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%" + uint16.FORMAT, concrete_array.get_value(i));
}
break;
case GArrow.Type.UINT32:
var concrete_array = array as GArrow.UInt32Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%" + uint32.FORMAT, concrete_array.get_value(i));
}
break;
case GArrow.Type.UINT64:
var concrete_array = array as GArrow.UInt64Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%" + uint64.FORMAT, concrete_array.get_value(i));
}
break;
case GArrow.Type.INT8:
var concrete_array = array as GArrow.Int8Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%hhd", concrete_array.get_value(i));
}
break;
case GArrow.Type.INT16:
var concrete_array = array as GArrow.Int16Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%" + int16.FORMAT, concrete_array.get_value(i));
}
break;
case GArrow.Type.INT32:
var concrete_array = array as GArrow.Int32Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%" + int32.FORMAT, concrete_array.get_value(i));
}
break;
case GArrow.Type.INT64:
var concrete_array = array as GArrow.Int64Array;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%" + int64.FORMAT, concrete_array.get_value(i));
}
break;
case GArrow.Type.FLOAT:
var concrete_array = array as GArrow.FloatArray;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%g", concrete_array.get_value(i));
}
break;
case GArrow.Type.DOUBLE:
var concrete_array = array as GArrow.DoubleArray;
for (var i = 0; i < n; i++) {
if (i > 0) {
stdout.printf(", ");
}
stdout.printf("%g", concrete_array.get_value(i));
}
break;
default:
break;
}
stdout.printf("]\n");
}
void print_record_batch(GArrow.RecordBatch record_batch) {
var n_columns = record_batch.get_n_columns();
for (int nth_column = 0; nth_column < n_columns; nth_column++) {
stdout.printf("columns[%d](%s): ",
nth_column,
record_batch.get_column_name(nth_column));
var array = record_batch.get_column_data(nth_column);
print_array(array);
}
}
int main (string[] args) {
var input_path = "/tmp/stream.arrow";
if (args.length > 1) {
input_path = args[0];
}
GArrow.MemoryMappedInputStream input;
try {
input = new GArrow.MemoryMappedInputStream(input_path);
} catch (Error error) {
stderr.printf("failed to open file: %s\n", error.message);
return Posix.EXIT_FAILURE;
}
{
GArrow.RecordBatchStreamReader reader;
try {
var seekable_input = input as GArrow.SeekableInputStream;
reader = new GArrow.RecordBatchStreamReader(seekable_input);
} catch (Error error) {
stderr.printf("failed to open stream reader: %s\n", error.message);
return Posix.EXIT_FAILURE;
}
while (true) {
GArrow.RecordBatch record_batch;
try {
record_batch = reader.read_next();
} catch (Error error) {
stderr.printf("failed to read the next record batch: %s\n",
error.message);
return Posix.EXIT_FAILURE;
}
if (record_batch == null) {
break;
}
print_record_batch(record_batch);
}
}
return Posix.EXIT_SUCCESS;
}
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