Full implementation of a jQuery based Selenium CSS selector (in Java)

JQuerySelector.java

package nl.avisi.langur.testing;

import org.openqa.selenium.*;
import org.openqa.selenium.remote.RemoteWebElement;

import java.util.List;

public class JQuerySelector extends By {

    private final String jQuerySelector;

    public JQuerySelector(String selector) {
        this.jQuerySelector = selector;
    }

    @Override
    public List<WebElement> findElements(SearchContext context) {
        return (List<WebElement>) findWithJQuery(context, true);
    }

    @Override
    public WebElement findElement(SearchContext context) {
        return (WebElement) findWithJQuery(context, false);
    }

    private Object findWithJQuery(SearchContext context, boolean returnList) {
        String getArgument = returnList ? "" : "0";

        if (context instanceof RemoteWebElement) {
            WebDriver driver = ((RemoteWebElement) context).getWrappedDriver();

            return ((JavascriptExecutor) driver).executeScript("return $(arguments[0]).find('" + jQuerySelector + "').get(" + getArgument + ");", context);
        }

        return ((JavascriptExecutor) context).executeScript("return $('" + jQuerySelector + "').get(" + getArgument + ");");
    }

    @Override
    public String toString() {
        return "By.jQuerySelector: " + jQuerySelector;
    }
}

can you please give an example for its usage ?