org.glassfish.jersey.servlet.WebConfig Maven / Gradle / Ivy

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
package org.glassfish.jersey.servlet;

import java.util.Enumeration;

import javax.servlet.FilterConfig;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;

/**
 * The Web configuration for accessing initialization parameters of a Web
 * component and the {@link ServletContext}.
 *
 * @author Paul Sandoz
 */
public interface WebConfig {

    /**
     * The web configuration type.
     */
    public static enum ConfigType {
        /**
         * A configuration type of servlet configuration.
         */
        ServletConfig,
        /**
         * A configuration type of filter configuration.
         */
        FilterConfig
    }

    /**
     * Get the configuration type of this config.
     *
     * @return the configuration type.
     */
    ConfigType getConfigType();

    /**
     * Get the corresponding ServletConfig if this WebConfig represents a {@link ServletConfig}
     *
     * @return servlet config or null
     */
    ServletConfig getServletConfig();

    /**
     * Get the corresponding FilterConfig if this WebConfig represents a {@link FilterConfig}
     *
     * @return filter config or null
     */
    FilterConfig getFilterConfig();

    /**
     * Get the name of the Web component.
     *
     * @return the name of the Web component.
     */
    String getName();

    /**
     * Get an initialization parameter.
     *
     * @param name the parameter name.
     * @return the parameter value, or null if the parameter is not present.
     */
    String getInitParameter(String name);

    /**
     * Get the enumeration of initialization parameter names.
     *
     * @return the enumeration of initialization parameter names.
     */
    Enumeration getInitParameterNames();

    /**
     * Get the {@link ServletContext}.
     *
     * @return the {@link ServletContext}.
     */
    ServletContext getServletContext();
}