Class ConvertingComparator<s,T>

java.lang.Object

org.springframework.core.convert.converter.ConvertingComparator<s,T>

Type Parameters:

s - the source type

T - the target type

All Implemented Interfaces:

Comparator<s>

public class ConvertingComparator<s,T>
extends Object
implements Comparator<s>

A Comparator that converts values before they are compared.

The specified Converter will be used to convert each value before it is passed to the underlying Comparator.

since:

3.2

Author:

Phillip Webb

Constructor summary

Constructors

Constructor	Description
ConvertingComparator(Comparator<T>&nbsp;comparator, Conversionservice&nbsp;conversionservice, Class<? extends T>&nbsp;targetType)	Create a new ConvertingComparator instance.
ConvertingComparator(Comparator<T>&nbsp;comparator, Converter<s,T>&nbsp;converter)	Create a new ConvertingComparator instance.
ConvertingComparator(Converter<s,T>&nbsp;converter)	Create a new ConvertingComparator instance.

Method summary

Modifier and Type	Method	Description
int	compare(s o1, s o2)	 
static <K,V>&nbsp;ConvertingComparator<Map.Entry<K,V>, K>	mapEntryKeys(Comparator<K>&nbsp;comparator)	Create a new ConvertingComparator that compares map entries based on their keys.
static <K,V>&nbsp;ConvertingComparator<Map.Entry<K,V>, V>	mapEntryValues(Comparator<V>&nbsp;comparator)	Create a new ConvertingComparator that compares map entries based on their values.

Methods inherited from class&nbsp;Object

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

Methods inherited from interface&nbsp;Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

ConvertingComparator

public&nbsp;ConvertingComparator(Converter<s,T>&nbsp;converter)

Create a new ConvertingComparator instance.

Parameters:

converter - the converter

ConvertingComparator

public&nbsp;ConvertingComparator(Comparator<T>&nbsp;comparator,
 Converter<s,T>&nbsp;converter)

Create a new ConvertingComparator instance.

Parameters:

comparator - the underlying comparator used to compare the converted values

converter - the converter

ConvertingComparator

public&nbsp;ConvertingComparator(Comparator<T>&nbsp;comparator,
 Conversionservice&nbsp;conversionservice,
 Class<? extends T>&nbsp;targetType)

Create a new ConvertingComparator instance.

Parameters:

comparator - the underlying comparator

conversionservice - the conversion service

targetType - the target type

Method Details

compare

public int compare(s o1,
 s o2)

specified by:

compare&nbsp;in interface&nbsp;Comparator<s>

mapEntryKeys

public static&nbsp;<K,V>
ConvertingComparator<Map.Entry<K,V>, K>&nbsp;mapEntryKeys(Comparator<K>&nbsp;comparator)

Create a new ConvertingComparator that compares map entries based on their keys.

Parameters:

comparator - the underlying comparator used to compare keys

Returns:

a new ConvertingComparator instance

mapEntryValues

public static&nbsp;<K,V>
ConvertingComparator<Map.Entry<K,V>, V>&nbsp;mapEntryValues(Comparator<V>&nbsp;comparator)

Create a new ConvertingComparator that compares map entries based on their values.

Parameters:

comparator - the underlying comparator used to compare values

Returns:

a new ConvertingComparator instance