https://github.com/jOOQ/jOOX: jOOX is a recursive acronym that stands for jOOX Object Oriented XML. It is a simple wrapper for the org.w3c.dom package, to allow for fluent XML document creation and manipulation where DOM is required but too verbose.
  • Lukas Eder 
package org.joox.selector;


Assertion utility methods.

Author:Christer Sandberg
/**
 * Assertion utility methods.
 *
 * @author Christer Sandberg
 */
final class Assert {

    
Private CTOR.

/**
     * Private CTOR.
     */
    private Assert() {
    }

    
Check if the specified expression is true. If not throw an IllegalArgumentException with the specified message. 
Params:
  • expression – The expression to check.
  • message – The exception message if the expression is false.
/**
     * Check if the specified {@code expression} is {@code true}. If not throw an
     * {@link IllegalArgumentException} with the specified {@code message}.
     *
     * @param expression The expression to check.
     * @param message The exception message if the {@code expression} is {@code false}.
     */
    public static void isTrue(boolean expression, String message) {
        if (!expression) {
            throw new IllegalArgumentException(message);
        }
    }

    
Check if the specified object is null, and throw an IllegalArgumentException if it is. 
Params:
  • object – The object to check.
  • message – The exception message if the object is null.
/**
     * Check if the specified {@code object} is {@code null}, and throw an
     * {@link IllegalArgumentException} if it is.
     *
     * @param object The object to check.
     * @param message The exception message if the {@code object} is {@code null}.
     */
    public static void notNull(Object object, String message) {
        if (object == null) {
            throw new IllegalArgumentException(message);
        }
    }

}