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Crawling Ajax applications through dynamic analysis and reconstruction of the UI state changes. Crawljax is based on a method which dynamically builds a `state-flow graph' modeling the various navigation paths and states within an Ajax application.

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package com.crawljax.condition;

import net.jcip.annotations.Immutable;

import com.crawljax.browser.EmbeddedBrowser;

/**
 * Condition that returns true iff no elements are found with expression.
 * 
 * @author [email protected] (Danny Roest)
 * @version $Id$
 */
@Immutable
public class NotXPathCondition extends AbstractCondition {

	private final XPathCondition xpathCondition;

	/**
	 * @param expression
	 *            the XPath expression.
	 */
	public NotXPathCondition(String expression) {
		this.xpathCondition = new XPathCondition(expression);
	}

	@Override
	public boolean check(EmbeddedBrowser browser) {
		return Logic.not(xpathCondition).check(browser);
	}

}