Java Code Examples for org.apache.hadoop.hive.serde2.SerDe#initialize()
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org.apache.hadoop.hive.serde2.SerDe#initialize() .
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Example 1
Source File: TestInputOutputFormat.java From hive-dwrf with Apache License 2.0 | 5 votes |
@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 |
/** * 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; }