libraries/servlet/src/main/java/org/apache/zest/library/servlet/Qi4jFilter.java

/*
 * Copyright (c) 2010, Paul Merlin. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.apache.zest.library.servlet;

import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import org.apache.zest.api.structure.Application;
import org.apache.zest.library.servlet.lifecycle.AbstractQi4jServletBootstrap;

/**
 * Base Filter providing easy access to the {@link Application} from the {@link ServletContext}.
 * @see AbstractQi4jServletBootstrap
 */
public abstract class Qi4jFilter
        implements Filter
{

    private Application application;

    @Override
    public void init( FilterConfig filterConfig )
            throws ServletException
    {
        application = Qi4jServletSupport.application( filterConfig.getServletContext() );
    }

    protected final Application application()
    {
        return application;
    }

}