org.geotools.feature.visitor

Class UniqueVisitor.UniqueResult

Object

AbstractCalcResult

UniqueVisitor.UniqueResult

All Implemented Interfaces:

CalcResult

Enclosing class:

UniqueVisitor

public static class UniqueVisitor.UniqueResult
extends AbstractCalcResult

Field Summary

Fields inherited from interface CalcResult

NULL_RESULT

Constructor Summary

Constructors

Constructor and Description
UniqueResult(Set newSet)
UniqueResult(Set newSet, boolean preserveOrder)

Method Summary

Modifier and Type	Method and Description
static Set	createNewSet(Collection collection, boolean preserveOrder)
Object	getValue() Actual answer
boolean	isCompatible(CalcResult targetResults) Returns true if the target results is a compatible type with the current results, with compatible meaning that the two results may be merged.
CalcResult	merge(CalcResult resultsToAdd) Returns the merged results of two CalcResult.

Methods inherited from class AbstractCalcResult

toArray, toDouble, toEnvelope, toFloat, toGeometry, toInt, toList, toLong, toMap, toPoint, toSet, toString, toStringArray

Methods inherited from class Object

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

Constructor Detail

UniqueResult

public UniqueResult(Set newSet)

UniqueResult

public UniqueResult(Set newSet,
                    boolean preserveOrder)

Method Detail

createNewSet

public static Set createNewSet(Collection collection,
                               boolean preserveOrder)

getValue

public Object getValue()

Description copied from interface: CalcResult

Actual answer

Specified by:

getValue in interface CalcResult

Overrides:

getValue in class AbstractCalcResult

Returns:

the calculation result as a generic object

isCompatible

public boolean isCompatible(CalcResult targetResults)

Description copied from interface: CalcResult

Returns true if the target results is a compatible type with the current results, with compatible meaning that the two results may be merged.

Specified by:

isCompatible in interface CalcResult

Overrides:

isCompatible in class AbstractCalcResult

Parameters:

targetResults - the second CalcResult Object

Returns:

true if the targetResults can be merged with the current results

merge

public CalcResult merge(CalcResult resultsToAdd)

Description copied from interface: CalcResult

Returns the merged results of two CalcResult. The way in which the results are merged is dependent on the type of the results added. A new instance is created containing the merged results.

For example: merging two min functions would return the smaller of the two values; merging a count and a sum would return an average.

Specified by:

merge in interface CalcResult

Overrides:

merge in class AbstractCalcResult

Returns:

the merged results