import org.apache.cassandra.db.marshal.DateType; //导入依赖的package包/类
@Test
public void testEmptiableTypes()
{
    AbstractType<?>[] types = new AbstractType<?>[]{
                                                   BooleanType.instance,
                                                   CounterColumnType.instance,
                                                   DateType.instance,
                                                   DecimalType.instance,
                                                   DoubleType.instance,
                                                   FloatType.instance,
                                                   InetAddressType.instance,
                                                   Int32Type.instance,
                                                   IntegerType.instance,
                                                   LongType.instance,
                                                   TimestampType.instance,
                                                   TimeUUIDType.instance,
                                                   UUIDType.instance
    };

    for (AbstractType<?> type : types)
    {
        Assert.assertTrue(type.getClass().getSimpleName(), UDHelper.isNullOrEmpty(type, ByteBufferUtil.EMPTY_BYTE_BUFFER));
        Assert.assertTrue("reversed " + type.getClass().getSimpleName(),
                          UDHelper.isNullOrEmpty(ReversedType.getInstance(type), ByteBufferUtil.EMPTY_BYTE_BUFFER));
    }
}
 

import org.apache.cassandra.db.marshal.DateType; //导入依赖的package包/类
public static AbstractType getCassandraType(PrimitiveObjectInspector oi) {
    switch (oi.getPrimitiveCategory()) {
        case BOOLEAN:
            return BooleanType.instance;
        case INT:
            return Int32Type.instance;
        case LONG:
            return LongType.instance;
        case FLOAT:
            return FloatType.instance;
        case DOUBLE:
            return DoubleType.instance;
        case STRING:
            return UTF8Type.instance;
        case BYTE:
        case SHORT:
        case BINARY:
            return BytesType.instance;
        case TIMESTAMP:
            return DateType.instance;
        default:
            throw new RuntimeException("Hive internal error.");

    }
}
 

import org.apache.cassandra.db.marshal.DateType; //导入依赖的package包/类
public static AbstractType getCassandraType(PrimitiveObjectInspector oi) {
  switch (oi.getPrimitiveCategory()) {
  case BOOLEAN:
    return BooleanType.instance;
  case INT:
    return Int32Type.instance;
  case LONG:
    return LongType.instance;
  case FLOAT:
    return FloatType.instance;
  case DOUBLE:
    return DoubleType.instance;
  case STRING:
    return UTF8Type.instance;
  case BYTE:
  case SHORT:
  case BINARY:
    return BytesType.instance;
  case TIMESTAMP:
    return DateType.instance;
  default:
    throw new RuntimeException("Hive internal error.");

  }
}
 

import org.apache.cassandra.db.marshal.DateType; //导入依赖的package包/类
public ByteBuffer execute(List<ByteBuffer> parameters)
{
    ByteBuffer bb = parameters.get(0);
    if (bb == null)
        return null;

    return ByteBuffer.wrap(UUIDGen.decompose(UUIDGen.minTimeUUID(DateType.instance.compose(bb).getTime())));
}
 

import org.apache.cassandra.db.marshal.DateType; //导入依赖的package包/类
public Dates(String name, GeneratorConfig config)
{
    super(DateType.instance, config, name, Date.class);
}
 

import org.apache.cassandra.db.marshal.DateType; //导入依赖的package包/类
public ByteBuffer execute(List<ByteBuffer> parameters)
{
    return ByteBuffer.wrap(UUIDGen.decompose(UUIDGen.minTimeUUID(DateType.instance.compose(parameters.get(0)).getTime())));
}