CoreWriter.java

package org.apache.orc.examples;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch;
import org.apache.orc.OrcFile;
import org.apache.orc.TypeDescription;
import org.apache.orc.Writer;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class CoreWriter {
  public static void main(String[] args) throws IOException {
    Configuration conf = new Configuration();
    TypeDescription schema =
      TypeDescription.fromString("struct<x:int,y:string>");
    Writer writer = OrcFile.createWriter(new Path("my-file.orc"),
                                         OrcFile.writerOptions(conf)
                                          .setSchema(schema));
    VectorizedRowBatch batch = schema.createRowBatch();
    LongColumnVector x = (LongColumnVector) batch.cols[0];
    BytesColumnVector y = (BytesColumnVector) batch.cols[1];
    for(int r=0; r < 10000; ++r) {
      int row = batch.size++;
      x.vector[row] = r;
      byte[] buffer = ("Last-" + (r * 3)).getBytes(StandardCharsets.UTF_8);
      y.setRef(row, buffer, 0, buffer.length);
      // If the batch is full, write it out and start over.
      if (batch.size == batch.getMaxSize()) {
        writer.addRowBatch(batch);
        batch.reset();
      }
    }
    if (batch.size != 0) {
      writer.addRowBatch(batch);
    }
    writer.close();
  }
}

Code doesn't work without {HADOOP}\bin\winutils.exe