ApplicationFactoryImpl.java

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package com.sun.faces.application;

import static com.sun.faces.util.MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID;
import static com.sun.faces.util.MessageUtils.getExceptionMessageString;
import static java.util.logging.Level.FINE;

import java.text.MessageFormat;
import java.util.logging.Logger;

import javax.faces.application.Application;
import javax.faces.application.ApplicationFactory;

import com.sun.faces.util.FacesLogger;

/**
 * Default implementation of {@link ApplicationFactory}.
 */
public class ApplicationFactoryImpl extends ApplicationFactory {

    private static final Logger LOGGER = FacesLogger.APPLICATION.getLogger();

    
    // Attribute Instance Variables

    private volatile Application application;

    
    // Constructors and Initializers

    public ApplicationFactoryImpl() {
        super(null);
        application = null;
        if (LOGGER.isLoggable(FINE)) {
            LOGGER.log(FINE, "Created ApplicationFactory ");
        }
    }

    /**
     * <p>Create (if needed) and return an {@link Application} instance
     * for this web application.</p>
     */
    @Override
    public Application getApplication() {

        if (application == null) {
            application = new ApplicationImpl();
            InjectionApplicationFactory.setApplicationInstance(application);
            if (LOGGER.isLoggable(FINE)) {
                LOGGER.fine(MessageFormat.format(
                                "Created Application instance ''{0}''",
                                application));
            }
        }
        
        return application;
    }

    /**
     * <p>Replace the {@link Application} instance that will be
     * returned for this web application.</p>
     *
     * @param application The replacement {@link Application} instance
     */
    @Override
    public synchronized void setApplication(Application application) {
        if (application == null) {
            throw new NullPointerException(getExceptionMessageString(
                NULL_PARAMETERS_ERROR_MESSAGE_ID, "application"));
        }

        this.application = application;
        
        if (LOGGER.isLoggable(FINE)) {
            LOGGER.fine(MessageFormat.format(
                            "set Application Instance to ''{0}''", 
                            application.getClass().getName()));
        }
    }
}