nihal0107 commented on a change in pull request #3819:
URL: https://github.com/apache/carbondata/pull/3819#discussion_r450849269
##########
File path:
sdk/sdk/src/main/java/org/apache/carbondata/sdk/file/CarbonWriterBuilder.java
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@@ -594,6 +613,332 @@ public CarbonWriterBuilder withJsonInput(Schema
carbonSchema) {
return this;
}
+ /**
+ * to build a {@link CarbonWriter}, which accepts loading CSV files.
+ *
+ * @param filePath absolute path under which files should be loaded.
+ * @return CarbonWriterBuilder
+ */
+ public CarbonWriterBuilder withCsvPath(String filePath) {
+ if (filePath.length() == 0) {
+ throw new IllegalArgumentException("filePath can not be empty");
+ }
+ this.filePath = filePath;
+ this.isDirectory = new File(filePath).isDirectory();
+ this.withCsvInput();
+ return this;
+ }
+
+ /**
+ * to build a {@link CarbonWriter}, which accepts CSV files directory and
+ * list of file which has to be loaded.
+ *
+ * @param filePath directory where the CSV file exists.
+ * @param fileList list of files which has to be loaded.
+ * @return CarbonWriterBuilder
+ */
+ public CarbonWriterBuilder withCsvPath(String filePath, List<String>
fileList) {
+ this.fileList = fileList;
+ this.withCsvPath(filePath);
+ return this;
+ }
+
+ /**
+ * to build a {@link CarbonWriter}, which accepts loading Parquet files.
+ *
+ * @param filePath absolute path under which files should be loaded.
+ * @return CarbonWriterBuilder
+ */
+ public CarbonWriterBuilder withParquetPath(String filePath) throws
IOException {
+ if (filePath.length() == 0) {
+ throw new IllegalArgumentException("filePath can not be empty");
+ }
+ this.filePath = filePath;
+ this.isDirectory = new File(filePath).isDirectory();
+ this.writerType = WRITER_TYPE.PARQUET;
+ this.buildParquetReader();
+ return this;
+ }
+
+ /**
+ * to build a {@link CarbonWriter}, which accepts parquet files directory and
+ * list of file which has to be loaded.
+ *
+ * @param filePath directory where the parquet file exists.
+ * @param fileList list of files which has to be loaded.
+ * @return CarbonWriterBuilder
+ * @throws IOException
+ */
+ public CarbonWriterBuilder withParquetPath(String filePath, List<String>
fileList)
+ throws IOException {
+ this.fileList = fileList;
+ this.withParquetPath(filePath);
+ return this;
+ }
+
+ private void buildParquetReader() throws IOException {
+ AvroReadSupport<GenericRecord> avroReadSupport = new AvroReadSupport<>();
+ ParquetReader<GenericRecord> parquetReader;
+ if (this.isDirectory) {
+ if (this.fileList == null || this.fileList.size() == 0) {
+ File[] dataFiles = new File(this.filePath).listFiles();
+ if (dataFiles == null || dataFiles.length == 0) {
+ throw new RuntimeException("No Parquet file found at given location.
Please provide" +
+ "the correct folder location.");
+ }
+ parquetReader = ParquetReader.builder(avroReadSupport,
Review comment:
Handle the scenario:
Before calling write() I am checking all the file formats. If they are not
of same type then throwing the exception. These cases are handled for parquet,
ORC, avro and JSON file.
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