Java Code Examples for org.apache.hadoop.hive.serde2.SerDe#initialize()

The following examples show how to use org.apache.hadoop.hive.serde2.SerDe#initialize() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: TestInputOutputFormat.java    From hive-dwrf with Apache License 2.0 5 votes vote down vote up 
@Test
public void testEmptyFile() throws Exception {
  JobConf job = new JobConf(conf);
  Properties properties = new Properties();
  HiveOutputFormat<?, ?> outFormat = new OrcOutputFormat();
  FileSinkOperator.RecordWriter writer =
      outFormat.getHiveRecordWriter(conf, testFilePath, MyRow.class, true,
          properties, Reporter.NULL);
  writer.close(true);
  properties.setProperty("columns", "x,y");
  properties.setProperty("columns.types", "int:int");
  SerDe serde = new OrcSerde();
  serde.initialize(conf, properties);
  InputFormat<?,?> in = new OrcInputFormat();
  FileInputFormat.setInputPaths(conf, testFilePath.toString());
  InputSplit[] splits = in.getSplits(conf, 1);
  assertEquals(1, splits.length);

  // read the whole file
  conf.set("hive.io.file.readcolumn.ids", "0,1");
  org.apache.hadoop.mapred.RecordReader reader =
      in.getRecordReader(splits[0], conf, Reporter.NULL);
  Object key = reader.createKey();
  Object value = reader.createValue();
  assertEquals(0.0, reader.getProgress(), 0.00001);
  assertEquals(0, reader.getPos());
  assertEquals(false, reader.next(key, value));
  reader.close();
  assertEquals(null, serde.getSerDeStats());
}
Example 2
Source File: HiveUtilities.java    From dremio-oss with Apache License 2.0 3 votes vote down vote up 
/**
 * Utility method which creates a SerDe object for given SerDe class name and properties.
 *
 * @param jobConf Configuration to use when creating SerDe class
 * @param sLib {@link SerDe} class name
 * @param properties SerDe properties
 * @return
 * @throws Exception
 */
public static final SerDe createSerDe(final JobConf jobConf, final String sLib, final Properties properties) throws Exception {
  final Class<? extends SerDe> c = Class.forName(sLib).asSubclass(SerDe.class);
  final SerDe serde = c.getConstructor().newInstance();
  serde.initialize(jobConf, properties);

  return serde;
}