Struts example source code file (ConfiguredServletContext.java)

This example Struts source code file (ConfiguredServletContext.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

compositeenumeration, configuredservletcontext, enumeration, enumeration, file, io, iterator, map, net, network, object, object, servlet, servletcontext, string, string, suppresswarnings, suppresswarnings, util

The Struts ConfiguredServletContext.java source code

/*
 * $Id: ConfiguredServletContext.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.struts2.tiles;


import javax.servlet.RequestDispatcher;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;

/**
 * ServletContext implementation which allows Struts
 * to inject initialization parameters into the context
 * in order to reduce the amount of configuration required
 * within web.xml for using Tiles.
 *
 * The specified init parameters are only utilized if
 * they are not explicitaly defined in the web.xml
 *
 * @version $Rev: 651946 $
 * @since Struts 2.0.1
 */
@SuppressWarnings("deprecation")
public class ConfiguredServletContext implements ServletContext {

    private ServletContext rootContext;
    private Map<String, String> initParameters;


    public ConfiguredServletContext(ServletContext context, Map<String, String> initParameters) {
        this.rootContext = context;
        this.initParameters = initParameters;
    }

    public ServletContext getContext(String string) {
        return rootContext.getContext(string);
    }

    public int getMajorVersion() {
        return rootContext.getMajorVersion();
    }

    public int getMinorVersion() {
        return rootContext.getMinorVersion();
    }

    public String getMimeType(String string) {
        return rootContext.getMimeType(string);
    }

    public Set getResourcePaths(String string) {
        return rootContext.getResourcePaths(string);
    }

    public URL getResource(String string) throws MalformedURLException {
        return rootContext.getResource(string);
    }

    public InputStream getResourceAsStream(String string) {
        return rootContext.getResourceAsStream(string);
    }

    public RequestDispatcher getRequestDispatcher(String string) {
        return rootContext.getRequestDispatcher(string);
    }

    public RequestDispatcher getNamedDispatcher(String string) {
        return rootContext.getNamedDispatcher(string);
    }

    @SuppressWarnings("deprecation")
    public Servlet getServlet(String string) throws ServletException {
        return rootContext.getServlet(string);
    }

    @SuppressWarnings("deprecation")
    public Enumeration getServlets() {
        return rootContext.getServlets();  //To change body of implemented methods use File | Settings | File Templates.
    }

    @SuppressWarnings("deprecation")
    public Enumeration getServletNames() {
        return rootContext.getServletNames();
    }

    public void log(String string) {
        rootContext.log(string);
    }

    @SuppressWarnings("deprecation")
    public void log(Exception exception, String string) {
        rootContext.log(exception, string);
    }

    public void log(String string, Throwable throwable) {
        rootContext.log(string, throwable);
    }

    public String getRealPath(String string) {
        return rootContext.getRealPath(string);
    }

    public String getServerInfo() {
        return rootContext.getServerInfo();
    }

    public String getInitParameter(String string) {
        String parm = rootContext.getInitParameter(string);
        if (parm == null) {
            return initParameters.get(string);
        }
        return parm;
    }

    public Enumeration getInitParameterNames() {
        return new CompositeEnumeration(
                rootContext.getInitParameterNames(),
                initParameters.keySet().iterator());
    }

    public Object getAttribute(String string) {
        return rootContext.getAttribute(string);
    }

    public Enumeration getAttributeNames() {
        return rootContext.getAttributeNames();
    }

    public void setAttribute(String string, Object object) {
        rootContext.setAttribute(string, object);
    }

    public void removeAttribute(String string) {
        rootContext.removeAttribute(string);
    }

    public String getServletContextName() {
        return rootContext.getServletContextName();
    }

    class CompositeEnumeration implements Enumeration {

        private Enumeration first;
        private Iterator second;


        public CompositeEnumeration(Enumeration first, Iterator second) {
            this.first = first;
            this.second = second;
        }

        public boolean hasMoreElements() {
            return first.hasMoreElements() || second.hasNext();
        }

        public Object nextElement() {
            if (first.hasMoreElements()) {
                return first.nextElement();
            }

            return second.next();
        }
    }
}