org.apache.hadoop.hive.serde2.lazy
Class LazyStruct

java.lang.Object
  org.apache.hadoop.hive.serde2.lazy.LazyObjectBase
      org.apache.hadoop.hive.serde2.lazy.LazyObject<OI>
          org.apache.hadoop.hive.serde2.lazy.LazyNonPrimitive<LazySimpleStructObjectInspector>
              org.apache.hadoop.hive.serde2.lazy.LazyStruct

All Implemented Interfaces:

SerDeStatsStruct

public class LazyStruct
extends LazyNonPrimitive<LazySimpleStructObjectInspector>
implements SerDeStatsStruct

LazyObject for storing a struct. The field of a struct can be primitive or non-primitive. LazyStruct does not deal with the case of a NULL struct. That is handled by the parent LazyObject.

Constructor Summary

LazyStruct(LazySimpleStructObjectInspector oi)
Construct a LazyStruct object with the ObjectInspector.

Method Summary

Object	getField(int fieldID) Get one field out of the struct.
ArrayList<Object>	getFieldsAsList() Get the values of the fields as an ArrayList.
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.
void	init(ByteArrayRef bytes, int start, int length) Set the row data for this LazyStruct.

Methods inherited from class org.apache.hadoop.hive.serde2.lazy.LazyNonPrimitive

hashCode

Methods inherited from class java.lang.Object

equals, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LazyStruct

public LazyStruct(LazySimpleStructObjectInspector oi)

Construct a LazyStruct object with the ObjectInspector.

Method Detail

init

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

Set the row data for this LazyStruct.

Overrides:

init in class LazyNonPrimitive<LazySimpleStructObjectInspector>

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:

LazyObjectBase.init(ByteArrayRef, int, int)

getField

public Object getField(int fieldID)

Get one field out of the struct. 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).

Parameters:

fieldID - The field ID

Returns:

The field as a LazyObject

getFieldsAsList

public ArrayList<Object> getFieldsAsList()

Get the values of the fields as an ArrayList.

Returns:

The values of the fields as an ArrayList.

getObject

public Object getObject()

Description copied from class: LazyObjectBase

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

Overrides:

getObject in class LazyNonPrimitive<LazySimpleStructObjectInspector>

getRawDataSerializedSize

public long getRawDataSerializedSize()

Description copied from interface: SerDeStatsStruct

Rerurns the serialized size of the object.

Specified by:

getRawDataSerializedSize in interface SerDeStatsStruct