org.johnnei.javatorrent.utils

Class Argument

java.lang.Object

org.johnnei.javatorrent.utils.Argument

public class Argument
extends Object

A class which mimics Objects but throws IllegalArgumentException instead of NullPointerException

Method Summary

Modifier and Type	Method and Description
static <T> T	requireNonNull(T object, String message) Tests for null and throws IllegalArgumentException when null.
static void	requirePositive(int amount, String message) Tests if the given integer is positive.
static void	requireWithinBounds(int amount, int lowerLimit, int upperLimit, String message) Tests if the given amount is within the bounds.

Methods inherited from class java.lang.Object

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

Method Detail

requireNonNull

public static <T> T requireNonNull(T object,
                                   String message)

Tests for null and throws IllegalArgumentException when null.

Type Parameters:

T - The type

Parameters:

object - The object to test.

message - The message when it is null.

Returns:

The object instance when non-null.

requirePositive

public static void requirePositive(int amount,
                                   String message)

Tests if the given integer is positive.

Parameters:

amount - The amount to test.

message - The message when the amount is negative.

requireWithinBounds

public static void requireWithinBounds(int amount,
                                       int lowerLimit,
                                       int upperLimit,
                                       String message)

Tests if the given amount is within the bounds.

Parameters:

amount - The amount to test

lowerLimit - The lower limit (inclusive)

upperLimit - The upper limit (exclusive)