org.bremersee.comparator

Class DelegatingComparator

java.lang.Object

org.bremersee.comparator.DelegatingComparator

All Implemented Interfaces:

Comparator<Object>

public class DelegatingComparator
extends Object
implements Comparator<Object>

The delegating comparator extracts the field value of the specified field name or path and uses the specified comparator for sorting.

Author:

Christian Bremer

Constructor Summary

Constructors

Constructor and Description
DelegatingComparator(String field, Comparator<?> comparator) Instantiates a new delegating comparator.
DelegatingComparator(String field, ValueExtractor valueExtractor, Comparator<?> comparator) Instantiates a new delegating comparator.

Method Summary

Modifier and Type	Method and Description
int	compare(Object o1, Object o2)

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

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

DelegatingComparator

public DelegatingComparator(String field,
                            Comparator<?> comparator)

Instantiates a new delegating comparator.

Parameters:

field - the field name or path (can be null)

comparator - the comparator to compare the value of the field

DelegatingComparator

public DelegatingComparator(String field,
                            ValueExtractor valueExtractor,
                            Comparator<?> comparator)

Instantiates a new delegating comparator.

Parameters:

field - the field name or path (can be null)

valueExtractor - a custom value extractor (can be null)

comparator - the comparator to compare the value of the field

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator<Object>