Gui4jFactory.java :  » XML-UI » gui4j » org » gui4j » Java Open Source

package org.gui4j;

import java.lang.reflect.Constructor;
import java.net.URL;

import org.apache.commons.logging.LogFactory;
import org.gui4j.constants.Const;

/**
 * Main class to construct the Gui4j instance.
 */
public class Gui4jFactory
{
    /**
     * @param validateXML validate the xml file
     * @param logInvoke log all method invocation (very time consuming)
     * @param numberOfWorkerThreads maximal number of worker threads. Use -1, for an unrestricted count.
     * @param url the properties file containing the set of factory components. See gui4jComponent.properties
     * in the documentation.
     * @return Gui4j
     */
    public static Gui4j createGui4j(boolean validateXML, boolean logInvoke, int numberOfWorkerThreads, URL url)
    {
        if (url == null)
        {
            throw new NullPointerException("URL must not be null");
        }
        try
        {
            Class clazz = Class.forName("org.gui4j.core.impl.Gui4jImpl");
            Constructor c = clazz.getConstructor(new Class[] { Boolean.TYPE, Boolean.TYPE, Integer.TYPE, URL.class });
            c.setAccessible(true);
            Gui4j gui4j = (Gui4j) c.newInstance(new Object[] { new Boolean(validateXML), new Boolean(logInvoke),
                    new Integer(numberOfWorkerThreads), url });
            LogFactory.getLog(Gui4jFactory.class).info("Gui4j initialized (version "+Const.GUI4J_VERSION+")");
            return gui4j;
        }
        catch (Exception e)
        {
            LogFactory.getLog(Gui4jFactory.class).fatal(e, e);
            throw new RuntimeException(e);
        }
    }

    private Gui4jFactory()
    {

    }
}