JSFContainerInitializer.java

/*******************************************************************************
 * Copyright (c) 2006-2014 Nuxeo SA (http://nuxeo.com/) and others.
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 ******************************************************************************/
package org.nuxeo.ecm.platform.ui.web.application.config;

import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.faces.bean.ManagedBean;
import javax.faces.component.FacesComponent;
import javax.faces.component.behavior.FacesBehavior;
import javax.faces.convert.FacesConverter;
import javax.faces.event.NamedEvent;
import javax.faces.render.FacesBehaviorRenderer;
import javax.faces.render.FacesRenderer;
import javax.faces.validator.FacesValidator;
import javax.servlet.ServletContainerInitializer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.HandlesTypes;

@HandlesTypes({ FacesBehavior.class, FacesBehaviorRenderer.class,
        FacesComponent.class, FacesConverter.class, FacesValidator.class,
        FacesRenderer.class, ManagedBean.class, NamedEvent.class })
public class JSFContainerInitializer implements ServletContainerInitializer {

    protected static JSFContainerInitializer self;

    protected final Map<Class<? extends Annotation>,Set<Class<?>>> index = new HashMap<>();

    {
        self = this;
        for (Class<?> each:JSFContainerInitializer.class.getAnnotation(HandlesTypes.class).value()) {
            @SuppressWarnings("unchecked")
            final Class<? extends Annotation> anno = (Class<? extends Annotation>)each;
            index.put(anno, new HashSet<Class<?>>());
        }
    }

    @Override
    public void onStartup(Set<Class<?>> some, ServletContext ctx)
            throws ServletException {
        for (Class<?> each:some) {
            index(each);
        }
    }

    protected void index(Class<?> aType) {
        for (Class<? extends Annotation> each:index.keySet()) {
            if (aType.getAnnotation(each) != null) {
                index.get(each).add(aType);
            }
        }
    }

}