Indhumathi27 commented on a change in pull request #3819:
URL: https://github.com/apache/carbondata/pull/3819#discussion_r448835565
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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:
Please check below points
1. If filePath consists of other files such as orc or csv or avro, and you
are trying to build parquet reader with those files, which throws error. Better
to check FileFormat also
2. When writer.write is called, you are doing listFiles and directly trying
to create respective readers. This may fail, if user adds a non-parquet to
filePath after building CarbonWriterBuilder
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