InvertibleComparator (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.util.comparator
Class InvertibleComparator

java.lang.Object
  org.springframework.util.comparator.InvertibleComparator

All Implemented Interfaces:: Serializable, Comparator

public class InvertibleComparator
extends Object
implements Comparator, Serializable
extends Object
implements Comparator, Serializable

A decorator for a comparator, with an "ascending" flag denoting whether comparison results should be treated in forward (standard ascending) order or flipped for reverse (descending) order.

Since:: 1.2.2
Author:: Keith Donald, Juergen Hoeller
See Also:: Serialized Form

Constructor Summary

InvertibleComparator(Comparator comparator)
          Create an InvertibleComparator that sorts ascending by default.

InvertibleComparator(Comparator comparator, boolean ascending)
          Create an InvertibleComparator that sorts based on the provided order.

Method Summary

int compare(Object o1, Object o2)


boolean equals(Object obj)


int hashCode()


void invertOrder()
          Invert the sort order: ascending -> descending or descending -> ascending.

boolean isAscending()
          Return the sort order: ascending (true) or descending (false).

void setAscending(boolean ascending)
          Specify the sort order: ascending (true) or descending (false).

String toString()


Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Summary
`InvertibleComparator(Comparator comparator)` Create an InvertibleComparator that sorts ascending by default.
`InvertibleComparator(Comparator comparator, boolean ascending)` Create an InvertibleComparator that sorts based on the provided order.

Method Summary
`int`	`compare(Object o1, Object o2)`
`boolean`	`equals(Object obj)`
`int`	`hashCode()`
`void`	`invertOrder()` Invert the sort order: ascending -> descending or descending -> ascending.
`boolean`	`isAscending()` Return the sort order: ascending (true) or descending (false).
`void`	`setAscending(boolean ascending)` Specify the sort order: ascending (true) or descending (false).
`String`	`toString()`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Constructor Detail