Package org.bremersee.comparator

Class ValueComparator

java.lang.Object

org.bremersee.comparator.ValueComparator

All Implemented Interfaces:

Comparator<Object>

public class ValueComparator
extends Object
implements Comparator<Object>

The value comparator extracts field value of the specified field name or path and uses the specified description (ascending or descending, case sensitive or insensitive and 'null is first') for sorting.

Author:

Christian Bremer

Constructor Summary

Constructors

Constructor	Description
ValueComparator(String field, boolean asc, boolean ignoreCase, boolean nullIsFirst)	Instantiates a new value comparator.
ValueComparator(String field, boolean asc, boolean ignoreCase, boolean nullIsFirst, ValueExtractor valueExtractor)	Instantiates a new value comparator.
ValueComparator(SortOrder sortOrder)	Instantiates a new value comparator.
ValueComparator(SortOrder sortOrder, ValueExtractor valueExtractor)	Instantiates a new value comparator.

Method Summary

Modifier and Type	Method	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

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

Constructor Detail

ValueComparator

public ValueComparator(SortOrder sortOrder)

Instantiates a new value comparator.

Parameters:

sortOrder - the sort order (cannot be null)

ValueComparator

public ValueComparator(SortOrder sortOrder,
                       ValueExtractor valueExtractor)

Instantiates a new value comparator.

Parameters:

sortOrder - the sort order (cannot be null)

valueExtractor - the value extractor (if it is null, a default will be used)

ValueComparator

public ValueComparator(String field,
                       boolean asc,
                       boolean ignoreCase,
                       boolean nullIsFirst)

Instantiates a new value comparator.

Parameters:

field - the field name or path

asc - ascending or descending

ignoreCase - case insensitive or sensitive

nullIsFirst - null is first

ValueComparator

public ValueComparator(String field,
                       boolean asc,
                       boolean ignoreCase,
                       boolean nullIsFirst,
                       ValueExtractor valueExtractor)

Instantiates a new value comparator.

Parameters:

field - the field name or path

asc - ascending or descending

ignoreCase - case insensitive or sensitive

nullIsFirst - null is first

valueExtractor - a custom value extractor (if it is null, a default will be used)

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator<Object>