org.apache.lens.server.api.driver

Class InMemoryResultSet

java.lang.Object

org.apache.lens.server.api.driver.LensResultSet

org.apache.lens.server.api.driver.InMemoryResultSet

Direct Known Subclasses:

HiveInMemoryResultSet, JDBCResultSet

public abstract class InMemoryResultSet
extends LensResultSet

The Class InMemoryResultSet.

Constructor Summary

Constructors

Constructor and Description
InMemoryResultSet()

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	hasNext() Whether there is another result row available.
abstract ResultRow	next() Read the next result row.
abstract boolean	seekToStart()
abstract void	setFetchSize(int size) Set number of rows to be fetched at time
QueryResult	toQueryResult() Get the corresponding query result object.

Methods inherited from class org.apache.lens.server.api.driver.LensResultSet

getMetadata, size

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryResultSet

public InMemoryResultSet()

Method Detail

seekToStart

public abstract boolean seekToStart()
                             throws LensException

Throws:

LensException

hasNext

public abstract boolean hasNext()
                         throws LensException

Whether there is another result row available.

Returns:

true if next row if available, false otherwise

Throws:

LensException - the lens exception

next

public abstract ResultRow next()
                        throws LensException

Read the next result row.

Returns:

The row as list of object

Throws:

LensException - the lens exception

setFetchSize

public abstract void setFetchSize(int size)
                           throws LensException

Set number of rows to be fetched at time

Parameters:

size -

Throws:

LensException

toQueryResult

public QueryResult toQueryResult()
                          throws LensException

Description copied from class: LensResultSet

Get the corresponding query result object.

Specified by:

toQueryResult in class LensResultSet

Returns:

QueryResult

Throws:

LensException - the lens exception