Review

class Validate {
    /**
     * <p>Validate an argument, throwing <code>IllegalArgumentException</code>
     * if the test result is <code>false</code>.</p>
     * 
     * <p>This is used when validating according to an arbitrary boolean expression,
     * such as validating a primitive number or using your own custom validation 
     * expression.</p>
     *
     * <pre>
     * Validate.isTrue( i > 0, "The value must be greater than zero: ", i);
     * </pre>
     *
     * <p>For performance reasons, the long value is passed as a separate parameter and
     * appended to the message string only in the case of an error.</p>
     * 
     * @param expression  a boolean expression
     * @param message  the exception message you would like to see if the expression is <code>false</code>
     * @param value  the value to append to the message in case of error
     * @throws IllegalArgumentException if expression is <code>false</code>
     */
    public static void isTrue(boolean expression, String message, long value) {
        if (expression == false) {
            throw new IllegalArgumentException(message + value);
        }
    }

}