org.apache.hadoop.hive.ql.exec.persistence

Class BytesBytesMultiHashMap.Result

java.lang.Object

org.apache.hadoop.hive.ql.exec.persistence.BytesBytesMultiHashMap.Result

Enclosing class:

BytesBytesMultiHashMap

public static class BytesBytesMultiHashMap.Result
extends Object

The result of looking up a key in the multi-hash map. This object can read through the 0, 1, or more values found for the key.

Constructor Summary

Constructors

Constructor and Description
BytesBytesMultiHashMap.Result()

Method Summary

Methods

Modifier and Type	Method and Description
WriteBuffers.ByteSegmentRef	first()
void	forget() Lets go of any references to a hash map.
WriteBuffers.Position	getReadPos() Return the thread-safe read position.
boolean	hasRows()
boolean	isEof()
boolean	isSingleRow()
WriteBuffers.ByteSegmentRef	next()
void	set(BytesBytesMultiHashMap hashMap, long firstOffset, boolean hasList, long offsetAfterListRecordKeyLen) Set internal values for reading the values after finding a key.

Methods inherited from class java.lang.Object

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

Constructor Detail

BytesBytesMultiHashMap.Result

public BytesBytesMultiHashMap.Result()

Method Detail

getReadPos

public WriteBuffers.Position getReadPos()

Return the thread-safe read position.

hasRows

public boolean hasRows()

Returns:

Whether there are 1 or more values.

isSingleRow

public boolean isSingleRow()

Returns:

Whether there is just 1 value row.

set

public void set(BytesBytesMultiHashMap hashMap,
       long firstOffset,
       boolean hasList,
       long offsetAfterListRecordKeyLen)

Set internal values for reading the values after finding a key.

Parameters:

hashMap - The hash map we found the key in.

firstOffset - The absolute offset of the first record in the write buffers.

hasList - Whether there are multiple values (true) or just a single value (false).

offsetAfterListRecordKeyLen - The offset of just after the key length in the list record. Or, 0 when single row.

first

public WriteBuffers.ByteSegmentRef first()

next

public WriteBuffers.ByteSegmentRef next()

isEof

public boolean isEof()

Returns:

Whether we have read all the values or not.

forget

public void forget()

Lets go of any references to a hash map.