org.apache.hadoop.hive.serde2.lazy

Class LazyObject<OI extends ObjectInspector>

java.lang.Object

org.apache.hadoop.hive.serde2.lazy.LazyObject<OI>

All Implemented Interfaces:

LazyObjectBase

Direct Known Subclasses:

LazyNonPrimitive, LazyPrimitive

public abstract class LazyObject<OI extends ObjectInspector>
extends Object
implements LazyObjectBase

LazyObject stores an object in a range of bytes in a byte[]. A LazyObject can represent any primitive object or hierarchical object like array, map or struct.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	isNull
protected OI	oi

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LazyObject(OI oi) Create a LazyObject.

Method Summary

Methods

Modifier and Type	Method and Description
protected OI	getInspector()
Object	getObject() Returns the primitive object represented by this LazyObject.
abstract int	hashCode()
void	init(ByteArrayRef bytes, int start, int length) Set the data for this LazyObjectBase.
protected void	setInspector(OI oi)
void	setNull() called for null binary, hbase columns, for example

Methods inherited from class java.lang.Object

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

Field Detail

oi

protected OI extends ObjectInspector oi

isNull

protected boolean isNull

Constructor Detail

LazyObject

protected LazyObject(OI oi)

Create a LazyObject.

Parameters:

oi - Derived classes can access meta information about this Lazy Object (e.g, separator, nullSequence, escaper) from it.

Method Detail

hashCode

public abstract int hashCode()

Overrides:

hashCode in class Object

getInspector

protected OI getInspector()

setInspector

protected void setInspector(OI oi)

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

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

setNull

public void setNull()

Description copied from interface: LazyObjectBase

called for null binary, hbase columns, for example

Specified by:

setNull in interface LazyObjectBase

getObject

public Object getObject()

Returns the primitive object represented by this LazyObject. This is useful because it can make sure we have "null" for null objects.

Specified by:

getObject in interface LazyObjectBase