Package gov.usgs.earthquake.util

Class CompareUtil

java.lang.Object

gov.usgs.earthquake.util.CompareUtil

public class CompareUtil
extends Object

Utility class for comparing potentially null values.

Constructor Summary

Constructors

Constructor	Description
CompareUtil()

Method Summary

Modifier and Type	Method	Description
static <T extends Comparable<T>> int	nullSafeCompare(T a, T b)	A method to simplify comparison of two values, either of which may be null.

Methods inherited from class java.lang.Object

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

Constructor Details

CompareUtil

public CompareUtil()

Method Details

nullSafeCompare

public static <T extends Comparable<T>> int nullSafeCompare(T a,
 T b)

A method to simplify comparison of two values, either of which may be null. For purposes of this comparison, null values are > non-null values.

Type Parameters:

T - type

Parameters:

a - value to compare

b - value to compare

Returns:

-1, if a is not null and b is null; 0, if a is null and b is null; 1, if a is null and b is not null; otherwise, a.compareTo(b).