oracle.ide.util
Class ObjectUtils

java.lang.Object
  oracle.ide.util.ObjectUtils

public final class ObjectUtils
extends java.lang.Object

Constructor Summary

ObjectUtils()

Method Summary

static void	checkArg(boolean expression, java.lang.Object errorMessage) Throws IAE if expression evaluates to false.
static void	checkNotNull(java.lang.Object reference, java.lang.Object errorMessage) Throws NPE if reference is null.
static boolean	equal(java.lang.Object a, java.lang.Object b) Returns true if both arguments are null or if both are not null and a.equals(b)
static int	hashCode(java.lang.Object... objs) Returns a hashcode of several arguments grouped together in an array. If there is only a single argument then its hashcode will be returned if the argument is not null.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectUtils

public ObjectUtils()

Method Detail

hashCode

public static int hashCode(java.lang.Object... objs)

Returns a hashcode of several arguments grouped together in an array.
If there is only a single argument then its hashcode will be returned if the argument is not null.

Parameters:

objs - one or more elements

Returns:

the hashcode value of all arguments

equal

public static boolean equal(java.lang.Object a,
                            java.lang.Object b)

Returns true if both arguments are null or if both are not null and a.equals(b)

Parameters:

a - an Object reference

b - an Object reference

Returns:

true if both arguments are null or if both are not null and a.equals(b)

checkNotNull

public static void checkNotNull(java.lang.Object reference,
                                java.lang.Object errorMessage)

Throws NPE if reference is null.

Parameters:

reference - an Object reference

errorMessage - an additional message to be supplied to the NPE if the reference is null.

checkArg

public static void checkArg(boolean expression,
                            java.lang.Object errorMessage)

Throws IAE if expression evaluates to false.

Parameters:

expression - any boolean expression

errorMessage - an additional message to be supplied to the IAE if the reference is null.