org.directwebremoting.util
Class CompareUtil

java.lang.Object
  org.directwebremoting.util.CompareUtil

public class CompareUtil
extends java.lang.Object

Some utilities for comparing objects that could be null

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Constructor Summary

CompareUtil()

Method Summary

static <T> int	compare(java.lang.Comparable<T> o1, T o2) Compare 2 objects taking account of the fact that either could be null
static boolean	equals(java.lang.Object o1, java.lang.Object o2) Compare 2 objects taking account of the fact that either could be null

Methods inherited from class java.lang.Object

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

Constructor Detail

CompareUtil

public CompareUtil()

Method Detail

compare

public static <T> int compare(java.lang.Comparable<T> o1,
                              T o2)

Compare 2 objects taking account of the fact that either could be null

Type Parameters:

T - The type that we are comparing

Parameters:

o1 - The first object to compare

o2 - The second object to compare

Returns:

-1, 0, or 1

equals

public static boolean equals(java.lang.Object o1,
                             java.lang.Object o2)

Compare 2 objects taking account of the fact that either could be null

Parameters:

o1 - The first object to compare

o2 - The second object to compare

Returns:

true iff they are both null or if o1.equals(o2)