org.jfree.chart.util

Class Args

java.lang.Object

org.jfree.chart.util.Args

public class Args
extends Object

A utility class for checking method arguments.

Constructor Summary

Constructors

Constructor and Description
Args()

Method Summary

Modifier and Type	Method and Description
static void	nullNotPermitted(Object param, String name) Throws an IllegalArgumentException if the supplied param is null.
static void	requireInRange(int value, String name, int lowerBound, int upperBound) Checks that the value falls within the specified range and, if it does not, throws an IllegalArgumentException.
static void	requireNonNegative(int value, String name) Throws an IllegalArgumentException if value is negative.

Methods inherited from class java.lang.Object

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

Constructor Detail

Args

public Args()

Method Detail

nullNotPermitted

public static void nullNotPermitted(Object param,
                                    String name)

Throws an IllegalArgumentException if the supplied param is null.

Parameters:

param - the parameter to check (null permitted).

name - the name of the parameter (to use in the exception message if param is null).

Throws:

IllegalArgumentException - if param is null.

requireNonNegative

public static void requireNonNegative(int value,
                                      String name)

Throws an IllegalArgumentException if value is negative.

Parameters:

value - the value.

name - the parameter name (for use in the exception message).

requireInRange

public static void requireInRange(int value,
                                  String name,
                                  int lowerBound,
                                  int upperBound)

Checks that the value falls within the specified range and, if it does not, throws an IllegalArgumentException.

Parameters:

value - the value.

name - the parameter name.

lowerBound - the lower bound of the permitted range.

upperBound - the upper bound fo the permitted range.