gr.uoa.di.madgik.searchlibrary.operatorlibrary.sort

Class SortOp

java.lang.Object

gr.uoa.di.madgik.searchlibrary.operatorlibrary.sort.SortOp

public class SortOp
extends Object

This class performs a sorting based on some key on its input org.gcube.searchservice.searchlibrary.resultset.ResultSet and produces a output org.gcube.searchservice.searchlibrary.resultset.ResultSet sorted in the specified order.

Author:

UoA

Constructor Summary

Constructors

Constructor and Description
SortOp(URI inLocator, StatsContainer stats) Creates a new SortOp operating on the identified input with default timeout
SortOp(URI inLocator, StatsContainer stats, long timeout, TimeUnit timeUnit)

Method Summary

Modifier and Type	Method and Description
URI	compute(String key, short order) Performs the sorting operation using default method
URI	compute(String keyFieldName, short order, ComparisonMethod comparisonMethod, ComparisonMode comparisonMode, SortAlgorithm algorithm) Performs the sorting operation
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

SortOp

public SortOp(URI inLocator,
              StatsContainer stats)

Creates a new SortOp operating on the identified input with default timeout

Parameters:

inLocator - The locator identifying the input

stats - statistics

SortOp

public SortOp(URI inLocator,
              StatsContainer stats,
              long timeout,
              TimeUnit timeUnit)

Parameters:

inLocator - The locator identifying the input with configurable timeout

stats - statistics

timeout - The timeout to be used both by the reader and the writer

timeUnit - The unit of the timeout to be used

Method Detail

compute

public URI compute(String key,
                   short order)
            throws Exception

Performs the sorting operation using default method

Parameters:

key - The key to base the sorting on

order - The order of the sorting. This can be one of CompareTokens.ASCENDING_ORDER and CompareTokens.DESCENDING_ORDER

Returns:

The locator of the produced ResultSet

Throws:

Exception - An unrecoverable for the operation error occured

compute

public URI compute(String keyFieldName,
                   short order,
                   ComparisonMethod comparisonMethod,
                   ComparisonMode comparisonMode,
                   SortAlgorithm algorithm)
            throws Exception

Performs the sorting operation

Parameters:

keyFieldName - The name of the Field which will be used as a sort key

order - The order of the sorting. This can be one of CompareTokens.ASCENDING_ORDER and CompareTokens.DESCENDING_ORDER

comparisonMethod - The method of comparison. This can be one of ComparisonMethod.PROVIDED_MODE, ComparisonMethod.DETECT_MODE and ComparisonMethod.FULL_COMPARISON

comparisonMode - The mode of comparison, provided only if comparisonMethod=ComparisonMethod.PROVIDED_MODE. This can be one of ComparisonMode.COMPARE_LONGINTS, ComparisonMode.COMPARE_DOUBLES, ComparisonMode.COMPARE_DATES and ComparisonMode.COMPARE_STRINGS

Returns:

The locator of the produced ResultSet

Throws:

Exception - An unrecoverable for the operation error occured

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception