Module com.aoapps.lang

Package com.aoapps.lang.text

Class SmartComparator

java.lang.Object

com.aoapps.lang.text.SmartComparator

All Implemented Interfaces:

Comparator<Object>

public class SmartComparator
extends Object
implements Comparator<Object>

Compares strings in a case-insensitive, locale-aware manner. Also supports integer ranges within the string so would be sorted in the following order:

1. 1A
2. 2A
3. 10A
4. 11A
5. 11a
6. 12
7. B

Author:

AO Industries, Inc.

Field Summary

Fields

Modifier and Type	Field	Description
static final SmartComparator	ROOT	The smart comparator for the root locale.

Constructor Summary

Constructors

Constructor	Description
SmartComparator()
SmartComparator(Collator collator)
SmartComparator(Locale locale)

Method Summary

Modifier and Type	Method	Description
int	compare(Object o1, Object o2)	Compares two objects by their Object.toString() values.
int	compare(String s1, String s2)	Compares two strings, supporting null.

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

Field Details

ROOT

public static final SmartComparator ROOT

The smart comparator for the root locale.

Constructor Details

SmartComparator

public SmartComparator(Collator collator)

SmartComparator

public SmartComparator(Locale locale)

SmartComparator

public SmartComparator()

Method Details

compare

public int compare(Object o1,
 Object o2)

Compares two objects by their Object.toString() values.

Specified by:

compare in interface Comparator<Object>

See Also:

• Objects.toString(java.lang.Object, java.lang.String)
• compare(java.lang.Object, java.lang.Object)

compare

public int compare(String s1,
 String s2)

Compares two strings, supporting null. Sorts nulls after non-nulls.

This choice of nulls after non-nulls is selected to be consistent with PostgreSQL's default "NULLS LAST" ordering.