/*
 * JBoss, Home of Professional Open Source
 * Copyright 2013, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.richfaces.resource.optimizer.faces;

import java.util.Map;

import javax.faces.application.Resource;
import javax.faces.context.FacesContext;

/**
 * @author Nick Belaevski
 *
 */
// TODO nested resources?
public final class CurrentResourceContext {
    private static final Class<CurrentResourceContext> CONTEXT_ATTRIBUTE_KEY = CurrentResourceContext.class;
    private Resource resource = null;

    private CurrentResourceContext() {
    }

    public static CurrentResourceContext getInstance(FacesContext facesContext) {
        Map<Object, Object> attributes = facesContext.getAttributes();
        CurrentResourceContext stack = (CurrentResourceContext) attributes.get(CONTEXT_ATTRIBUTE_KEY);
        if (stack == null) {
            stack = new CurrentResourceContext();
            attributes.put(CONTEXT_ATTRIBUTE_KEY, stack);
        }

        return stack;
    }

    public void setResource(Resource resource) {
        this.resource = resource;
    }

    public Resource getResource() {
        return resource;
    }
}