org.apache.hadoop.hive.serde2.lazybinary

Class LazyBinaryUnion

java.lang.Object

org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryObject<OI>

org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryNonPrimitive<LazyBinaryUnionObjectInspector>

org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryUnion

All Implemented Interfaces:

LazyObjectBase, SerDeStatsStruct

public class LazyBinaryUnion
extends LazyBinaryNonPrimitive<LazyBinaryUnionObjectInspector>
implements SerDeStatsStruct

LazyBinaryUnion is serialized as follows: start TAG FIELD end bytes[] -> |-----|---------|--- ... ---|-----|---------| Section TAG is one byte, corresponding to tag of set union field FIELD is a LazyBinaryObject corresponding to set union field value.

Field Summary

Fields inherited from class org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryNonPrimitive

bytes, length, start

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LazyBinaryUnion(LazyBinaryUnionObjectInspector oi) Construct a LazyBinaryUnion object with an ObjectInspector.

Method Summary

Methods

Modifier and Type	Method and Description
Object	getField() Get the set field out of the union.
Object	getObject() If the LazyObjectBase is a primitive Object, then deserialize it and return the actual primitive Object.
long	getRawDataSerializedSize() Rerurns the serialized size of the object.
byte	getTag() Get the set field's tag
void	init(ByteArrayRef bytes, int start, int length) Set the data for this LazyObjectBase.

Methods inherited from class org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryNonPrimitive

hashCode

Methods inherited from class org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryObject

setNull

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LazyBinaryUnion

protected LazyBinaryUnion(LazyBinaryUnionObjectInspector oi)

Construct a LazyBinaryUnion object with an ObjectInspector.

Method Detail

init

public void init(ByteArrayRef bytes,
        int start,
        int length)

Description copied from interface: LazyObjectBase

Set the data for this LazyObjectBase. We take ByteArrayRef instead of byte[] so that we will be able to drop the reference to byte[] by a single assignment. The ByteArrayRef object can be reused across multiple rows.

Specified by:

init in interface LazyObjectBase

Overrides:

init in class LazyBinaryNonPrimitive<LazyBinaryUnionObjectInspector>

Parameters:

bytes - The wrapper of the byte[].

start - The start position inside the bytes.

length - The length of the data, starting from "start"

See Also:

ByteArrayRef

getField

public Object getField()

Get the set field out of the union. If the field is a primitive field, return the actual object. Otherwise return the LazyObject. This is because PrimitiveObjectInspector does not have control over the object used by the user - the user simply directly use the Object instead of going through Object PrimitiveObjectInspector.get(Object).

Returns:

The field as a LazyObject

getObject

public Object getObject()

Description copied from interface: LazyObjectBase

If the LazyObjectBase is a primitive Object, then deserialize it and return the actual primitive Object. Otherwise (array, map, struct), return this.

Specified by:

getObject in interface LazyObjectBase

Overrides:

getObject in class LazyBinaryNonPrimitive<LazyBinaryUnionObjectInspector>

getRawDataSerializedSize

public long getRawDataSerializedSize()

Description copied from interface: SerDeStatsStruct

Rerurns the serialized size of the object.

Specified by:

getRawDataSerializedSize in interface SerDeStatsStruct

getTag

public byte getTag()

Get the set field's tag

Returns:

The tag of the field set in the union