nihal0107 commented on a change in pull request #3819: URL: https://github.com/apache/carbondata/pull/3819#discussion_r450843943
########## File path: sdk/sdk/src/main/java/org/apache/carbondata/sdk/file/ORCCarbonWriter.java ########## @@ -0,0 +1,196 @@ +/* + * 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. + */ + +package org.apache.carbondata.sdk.file; + +import java.io.File; +import java.io.IOException; +import java.util.*; + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.hive.ql.io.orc.OrcFile; +import org.apache.hadoop.hive.ql.io.orc.OrcStruct; +import org.apache.hadoop.hive.ql.io.orc.Reader; +import org.apache.hadoop.hive.ql.io.orc.RecordReader; +import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; +import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector; +import org.apache.hadoop.io.Text; + +/** + * Implementation to write ORC rows in CSV format to carbondata file. + */ +public class ORCCarbonWriter extends CSVCarbonWriter { + private CSVCarbonWriter csvCarbonWriter = null; + private String filePath = ""; + private Reader orcReader = null; + private boolean isDirectory = false; + private List<String> fileList; + + ORCCarbonWriter(CSVCarbonWriter csvCarbonWriter) { + this.csvCarbonWriter = csvCarbonWriter; + } + + @Override + public void setFilePath(String filePath) { + this.filePath = filePath; + } + + @Override + public void setIsDirectory(boolean isDirectory) { + this.isDirectory = isDirectory; + } + + @Override + public void setFileList(List<String> fileList) { + this.fileList = fileList; + } + + /** + * Load ORC file in iterative way. + */ + @Override + public void write() throws IOException { + if (this.filePath.length() == 0) { + throw new RuntimeException("'withOrcPath()' must be called to support load ORC files"); + } + if (this.csvCarbonWriter == null) { + throw new RuntimeException("csv carbon writer can not be null"); + } + 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 ORC file found at given location. Please provide " + + "the correct folder location."); + } + for (File dataFile : dataFiles) { + this.loadSingleFile(dataFile); + } + } else { + for (String file : this.fileList) { + this.loadSingleFile(new File(this.filePath + "/" + file)); + } + } + } else { + this.loadSingleFile(new File(this.filePath)); + } + } + + private void loadSingleFile(File file) throws IOException { + orcReader = OrcFile.createReader(new Path(String.valueOf(file)), + OrcFile.readerOptions(new Configuration())); + ObjectInspector objectInspector = orcReader.getObjectInspector(); + RecordReader recordReader = orcReader.rows(); + if (objectInspector instanceof StructObjectInspector) { + StructObjectInspector structObjectInspector = + (StructObjectInspector) orcReader.getObjectInspector(); + while (recordReader.hasNext()) { + Object record = recordReader.next(null); // to remove duplicacy. + List valueList = structObjectInspector.getStructFieldsDataAsList(record); + for (int i = 0; i < valueList.size(); i++) { + valueList.set(i, parseOrcObject(valueList.get(i), 0)); + } + this.csvCarbonWriter.write(valueList.toArray()); + } + } else { + while (recordReader.hasNext()) { + Object record = recordReader.next(null); // to remove duplicacy. + this.csvCarbonWriter.write(new Object[]{parseOrcObject(record, 0)}); + } + } + } + + private String parseOrcObject(Object obj, int level) { Review comment: done ---------------------------------------------------------------- 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
