Examples of org.apache.hadoop.hive.serde2.Deserializer

org.apache.hadoop.hive.serde2.Deserializer
HiveDeserializer is used to deserialize the data from hadoop Writable to a custom java object that can be of any type that the developer wants. HiveDeserializer also provides the ObjectInspector which can be used to inspect the internal structure of the object (that is returned by deserialize function).

  /**
   * Check if the given serde is valid.
   */
  private void validateSerDe(String serdeName) throws HiveException {
    try {
      Deserializer d = SerDeUtils.lookupDeserializer(serdeName);
      if (d != null) {
        LOG.debug("Found class for " + serdeName);
      }
    } catch (SerDeException e) {
      throw new HiveException("Cannot validate serde: " + serdeName, e);

View Full Code Here

    public static Deserializer getDeserializer(Properties schema)
    {
        String name = schema.getProperty(SERIALIZATION_LIB);
        checkArgument(name != null, "missing property: %s", SERIALIZATION_LIB);


        Deserializer deserializer = createDeserializer(getDeserializerClass(name));
        initializeDeserializer(deserializer, schema);
        return deserializer;
    }

View Full Code Here

   *
   */
  static public Deserializer getDeserializer(Configuration conf, Properties schema) throws MetaException  {
    String lib = schema.getProperty(org.apache.hadoop.hive.serde.Constants.SERIALIZATION_LIB);
    try {
      Deserializer deserializer = SerDeUtils.lookupDeserializer(lib);
      ((Deserializer)deserializer).initialize(conf, schema);
      return deserializer;
    } catch (Exception e) {
      LOG.error("error in initSerDe: " + e.getClass().getName() + " " + e.getMessage());
      MetaStoreUtils.printStackTrace(e);

View Full Code Here

   *
   */
  static public Deserializer getDeserializer(Configuration conf, org.apache.hadoop.hive.metastore.api.Table table) throws MetaException  {
    String lib = table.getSd().getSerdeInfo().getSerializationLib();
    try {
      Deserializer deserializer = SerDeUtils.lookupDeserializer(lib);
      deserializer.initialize(conf, MetaStoreUtils.getSchema(table));
      return deserializer;
    } catch (Exception e) {
      LOG.error("error in initSerDe: " + e.getClass().getName() + " " + e.getMessage());
      MetaStoreUtils.printStackTrace(e);
      throw new MetaException(e.getClass().getName() + " " + e.getMessage());

View Full Code Here

      }
      // xxx


      try {
        //            Table t = Table.readTable(p, this.db);
        Deserializer s = MetaStoreUtils.getDeserializer( conf_, p);
        ObjectInspector oi = s.getObjectInspector();
        
        // recurse down the type.subtype.subsubtype expression until at the desired type
        for(int i =  1; i < names.length; i++) {
          if (!(oi instanceof StructObjectInspector)) {
            oi = s.getObjectInspector();
            break;
          }
          StructObjectInspector soi = (StructObjectInspector)oi;
          StructField sf = soi.getStructFieldRef(names[i]);
          if (sf == null) {
            // If invalid field, then return the schema of the table
            oi = s.getObjectInspector();
            break;
          } else {
            oi = sf.getFieldObjectInspector();
          }
        }

View Full Code Here

          tbl = this.get_table(db, base_table_name);
        } catch (NoSuchObjectException e) {
          throw new UnknownTableException(e.getMessage());
        }
        try {
          Deserializer s = MetaStoreUtils.getDeserializer(this.hiveConf, tbl);
          return MetaStoreUtils.getFieldsFromDeserializer(tableName, s);
        } catch(SerDeException e) {
          StringUtils.stringifyException(e);
          throw new MetaException(e.getMessage());
        }

View Full Code Here

   */
  Operator genConversionSelectOperator(String dest, QB qb,
      Operator input, tableDesc table_desc) throws SemanticException {
    StructObjectInspector oi = null;
    try {
      Deserializer deserializer = table_desc.getDeserializerClass().newInstance();
      deserializer.initialize(conf, table_desc.getProperties());
      oi = (StructObjectInspector) deserializer.getObjectInspector();
    } catch (Exception e) {
      throw new SemanticException(e);
    }
    
    // Check column number

View Full Code Here

  /**
   * Check if the given serde is valid
   */
  private void validateSerDe(String serdeName) throws HiveException {
    try {
      Deserializer d = SerDeUtils.lookupDeserializer(serdeName);
      if(d != null) {
        System.out.println("Found class for " + serdeName);
      }
    } catch (SerDeException e) {
      throw new HiveException ("Cannot validate serde: " + serdeName, e);

View Full Code Here

    
    String tableName = String.valueOf(tblProps.getProperty("name"));
    String partName = String.valueOf(partSpec);
    //HiveConf.setVar(hconf, HiveConf.ConfVars.HIVETABLENAME, tableName);
    //HiveConf.setVar(hconf, HiveConf.ConfVars.HIVEPARTITIONNAME, partName);
    Deserializer deserializer = (Deserializer) sdclass.newInstance();
    deserializer.initialize(hconf, tblProps);
    StructObjectInspector rowObjectInspector = (StructObjectInspector)deserializer.getObjectInspector();


    MapOpCtx opCtx = null;
    // Next check if this table has partitions and if so
    // get the list of partition names as well as allocate
    // the serdes for the partition columns

View Full Code Here

  }
  /**
   * Return a deserializer object corresponding to the tableDesc
   */
  public Deserializer getDeserializer() throws Exception {
    Deserializer de = this.deserializerClass.newInstance();
    de.initialize(null, properties);
    return de;
  }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.hadoop.hive.serde2.Deserializer

com.asakusafw.directio.hive.orc.OrcFileInput

com.asakusafw.directio.hive.serde.DataModelDriver

com.asakusafw.directio.hive.serde.DataModelDriverTest

com.asakusafw.directio.hive.serde.ValueSerdeFactoryTest

com.facebook.giraph.hive.impl.input.InputSplitData

com.facebook.giraph.hive.input.HiveApiInputFormat

com.facebook.hive.orc.lazy.LazyDoubleTreeReader

com.facebook.hive.orc.lazy.LazyShortDictionaryTreeReader

com.facebook.hive.orc.lazy.LazyShortDirectTreeReader

com.facebook.hive.orc.lazy.OrcLazyStructObjectInspector

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.