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

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org.springframework.beans.support
Class PropertyComparator

java.lang.Object
  org.springframework.beans.support.PropertyComparator

All Implemented Interfaces:

Comparator

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public class PropertyComparator
extends Object
implements Comparator

PropertyComparator performs a comparison of two beans, evaluating the specified bean property via a BeanWrapper.

Since:

19.05.2003

Author:

Juergen Hoeller, Jean-Pierre Pawlak

See Also:

BeanWrapper

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Field Summary
protected  Log	logger

 

Constructor Summary
PropertyComparator(SortDefinition sortDefinition)           Create a new PropertyComparator for the given SortDefinition.
PropertyComparator(String property, boolean ignoreCase, boolean ascending)           Create a PropertyComparator for the given settings.

 

Method Summary
int	compare(Object o1, Object o2)
SortDefinition	getSortDefinition()           Return the SortDefinition that this comparator uses.
static void	sort(List source, SortDefinition sortDefinition)           Sort the given List according to the given sort definition.
static void	sort(Object[] source, SortDefinition sortDefinition)           Sort the given source according to the given sort definition.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface java.util.Comparator
equals

 

Field Detail

logger

protected final Log logger

Constructor Detail

PropertyComparator

public PropertyComparator(SortDefinition sortDefinition)

Create a new PropertyComparator for the given SortDefinition.

See Also:

MutableSortDefinition

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PropertyComparator

public PropertyComparator(String property,
                          boolean ignoreCase,
                          boolean ascending)

Create a PropertyComparator for the given settings.

Parameters:

property - the property to compare

ignoreCase - whether upper and lower case in String values should be ignored

ascending - whether to sort ascending (true) or descending (false)

Method Detail

getSortDefinition

public final SortDefinition getSortDefinition()

Return the SortDefinition that this comparator uses.

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compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator

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sort

public static void sort(List source,
                        SortDefinition sortDefinition)
                 throws BeansException

Sort the given List according to the given sort definition.

Note: Contained objects have to provide the given property in the form of a bean property, i.e. a getXXX method.

Parameters:

source - the input List

sortDefinition - the parameters to sort by

Throws:

IllegalArgumentException - in case of a missing propertyName

BeansException

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sort

public static void sort(Object[] source,
                        SortDefinition sortDefinition)
                 throws BeansException

Sort the given source according to the given sort definition.

Note: Contained objects have to provide the given property in the form of a bean property, i.e. a getXXX method.

Parameters:

source - input source

sortDefinition - the parameters to sort by

Throws:

IllegalArgumentException - in case of a missing propertyName

BeansException

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