HttpServletRequestWrapper.java

/*
 * Copyright (c) 1997, 2023 Oracle and/or its affiliates and others.
 * All rights reserved.
 * Copyright 2004 The Apache Software Foundation
 *
 * 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 jakarta.servlet.http;

import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequestWrapper;
import java.io.IOException;
import java.util.*;

/**
 * Provides a convenient implementation of the HttpServletRequest interface that can be subclassed by developers wishing
 * to adapt the request to a Servlet.
 *
 * <p>
 * This class implements the Wrapper or Decorator pattern. Methods default to calling through to the wrapped request
 * object.
 *
 * @see jakarta.servlet.http.HttpServletRequest
 * @since Servlet 2.3
 */
public class HttpServletRequestWrapper extends ServletRequestWrapper implements HttpServletRequest {

    /**
     * Constructs a request object wrapping the given request.
     *
     * @param request the {@link HttpServletRequest} to be wrapped.
     *
     * @throws java.lang.IllegalArgumentException if the request is null
     */
    public HttpServletRequestWrapper(HttpServletRequest request) {
        super(request);
    }

    private HttpServletRequest _getHttpServletRequest() {
        return (HttpServletRequest) super.getRequest();
    }

    /**
     * The default behavior of this method is to return getAuthType() on the wrapped request object.
     */
    @Override
    public String getAuthType() {
        return this._getHttpServletRequest().getAuthType();
    }

    /**
     * The default behavior of this method is to return getCookies() on the wrapped request object.
     */
    @Override
    public Cookie[] getCookies() {
        return this._getHttpServletRequest().getCookies();
    }

    /**
     * The default behavior of this method is to return getDateHeader(String name) on the wrapped request object.
     */
    @Override
    public long getDateHeader(String name) {
        return this._getHttpServletRequest().getDateHeader(name);
    }

    /**
     * The default behavior of this method is to return getHeader(String name) on the wrapped request object.
     */
    @Override
    public String getHeader(String name) {
        return this._getHttpServletRequest().getHeader(name);
    }

    /**
     * The default behavior of this method is to return getHeaders(String name) on the wrapped request object.
     */
    @Override
    public Enumeration<String> getHeaders(String name) {
        return this._getHttpServletRequest().getHeaders(name);
    }

    /**
     * The default behavior of this method is to return getHeaderNames() on the wrapped request object.
     */
    @Override
    public Enumeration<String> getHeaderNames() {
        return this._getHttpServletRequest().getHeaderNames();
    }

    /**
     * The default behavior of this method is to return getIntHeader(String name) on the wrapped request object.
     */
    @Override
    public int getIntHeader(String name) {
        return this._getHttpServletRequest().getIntHeader(name);
    }

    /**
     * The default behavior of this method is to return getServletMapping() on the wrapped request object.
     *
     * @since Servlet 4.0
     */
    @Override
    public HttpServletMapping getHttpServletMapping() {
        return this._getHttpServletRequest().getHttpServletMapping();
    }

    /**
     * The default behavior of this method is to return getMethod() on the wrapped request object.
     */
    @Override
    public String getMethod() {
        return this._getHttpServletRequest().getMethod();
    }

    /**
     * The default behavior of this method is to return getPathInfo() on the wrapped request object.
     */
    @Override
    public String getPathInfo() {
        return this._getHttpServletRequest().getPathInfo();
    }

    /**
     * The default behavior of this method is to return getPathTranslated() on the wrapped request object.
     */
    @Override
    public String getPathTranslated() {
        return this._getHttpServletRequest().getPathTranslated();
    }

    /**
     * The default behavior of this method is to return getContextPath() on the wrapped request object.
     */
    @Override
    public String getContextPath() {
        return this._getHttpServletRequest().getContextPath();
    }

    /**
     * The default behavior of this method is to return getQueryString() on the wrapped request object.
     */
    @Override
    public String getQueryString() {
        return this._getHttpServletRequest().getQueryString();
    }

    /**
     * The default behavior of this method is to return getRemoteUser() on the wrapped request object.
     */
    @Override
    public String getRemoteUser() {
        return this._getHttpServletRequest().getRemoteUser();
    }

    /**
     * The default behavior of this method is to return isUserInRole(String role) on the wrapped request object.
     */
    @Override
    public boolean isUserInRole(String role) {
        return this._getHttpServletRequest().isUserInRole(role);
    }

    /**
     * The default behavior of this method is to return getUserPrincipal() on the wrapped request object.
     */
    @Override
    public java.security.Principal getUserPrincipal() {
        return this._getHttpServletRequest().getUserPrincipal();
    }

    /**
     * The default behavior of this method is to return getRequestedSessionId() on the wrapped request object.
     */
    @Override
    public String getRequestedSessionId() {
        return this._getHttpServletRequest().getRequestedSessionId();
    }

    /**
     * The default behavior of this method is to return getRequestURI() on the wrapped request object.
     */
    @Override
    public String getRequestURI() {
        return this._getHttpServletRequest().getRequestURI();
    }

    /**
     * The default behavior of this method is to return getRequestURL() on the wrapped request object.
     */
    @Override
    public StringBuffer getRequestURL() {
        return this._getHttpServletRequest().getRequestURL();
    }

    /**
     * The default behavior of this method is to return getServletPath() on the wrapped request object.
     */
    @Override
    public String getServletPath() {
        return this._getHttpServletRequest().getServletPath();
    }

    /**
     * The default behavior of this method is to return getSession(boolean create) on the wrapped request object.
     */
    @Override
    public HttpSession getSession(boolean create) {
        return this._getHttpServletRequest().getSession(create);
    }

    /**
     * The default behavior of this method is to return getSession() on the wrapped request object.
     */
    @Override
    public HttpSession getSession() {
        return this._getHttpServletRequest().getSession();
    }

    /**
     * The default behavior of this method is to return changeSessionId() on the wrapped request object.
     *
     * @since Servlet 3.1
     */
    @Override
    public String changeSessionId() {
        return this._getHttpServletRequest().changeSessionId();
    }

    /**
     * The default behavior of this method is to return isRequestedSessionIdValid() on the wrapped request object.
     */
    @Override
    public boolean isRequestedSessionIdValid() {
        return this._getHttpServletRequest().isRequestedSessionIdValid();
    }

    /**
     * The default behavior of this method is to return isRequestedSessionIdFromCookie() on the wrapped request object.
     */
    @Override
    public boolean isRequestedSessionIdFromCookie() {
        return this._getHttpServletRequest().isRequestedSessionIdFromCookie();
    }

    /**
     * The default behavior of this method is to return isRequestedSessionIdFromURL() on the wrapped request object.
     */
    @Override
    public boolean isRequestedSessionIdFromURL() {
        return this._getHttpServletRequest().isRequestedSessionIdFromURL();
    }

    /**
     * The default behavior of this method is to call authenticate on the wrapped request object.
     *
     * @since Servlet 3.0
     */
    @Override
    public boolean authenticate(HttpServletResponse response) throws IOException, ServletException {
        return this._getHttpServletRequest().authenticate(response);
    }

    /**
     * The default behavior of this method is to call login on the wrapped request object.
     *
     * @since Servlet 3.0
     */
    @Override
    public void login(String username, String password) throws ServletException {
        this._getHttpServletRequest().login(username, password);
    }

    /**
     * The default behavior of this method is to call login on the wrapped request object.
     *
     * @since Servlet 3.0
     */
    @Override
    public void logout() throws ServletException {
        this._getHttpServletRequest().logout();
    }

    /**
     * The default behavior of this method is to call getParts on the wrapped request object.
     *
     * <p>
     * Any changes to the returned <code>Collection</code> must not affect this <code>HttpServletRequestWrapper</code>.
     *
     * @since Servlet 3.0
     */
    @Override
    public Collection<Part> getParts() throws IOException, ServletException {
        return this._getHttpServletRequest().getParts();
    }

    /**
     * The default behavior of this method is to call getPart on the wrapped request object.
     *
     * @since Servlet 3.0
     */
    @Override
    public Part getPart(String name) throws IOException, ServletException {
        return this._getHttpServletRequest().getPart(name);
    }

    /**
     * Create an instance of <code>HttpUpgradeHandler</code> for a given class and uses it for the http protocol upgrade
     * processing.
     *
     * @since Servlet 3.1
     */
    @Override
    public <T extends HttpUpgradeHandler> T upgrade(Class<T> handlerClass) throws IOException, ServletException {
        return this._getHttpServletRequest().upgrade(handlerClass);
    }

    /**
     * The default behavior of this method is to call newPushBuilder on the wrapped request object.
     *
     * @since Servlet 4.0
     *
     * @deprecated In favor of 103 early hints
     */
    @Deprecated
    @Override
    public PushBuilder newPushBuilder() {
        return this._getHttpServletRequest().newPushBuilder();
    }

    /**
     * The default behavior of this method is to call getTrailerFields on the wrapped request object.
     *
     * @since Servlet 4.0
     */
    @Override
    public Map<String, String> getTrailerFields() {
        return this._getHttpServletRequest().getTrailerFields();
    }

    /**
     * The default behavior of this method is to call isTrailerFieldsReady on the wrapped request object.
     *
     * @since Servlet 4.0
     */
    @Override
    public boolean isTrailerFieldsReady() {
        return this._getHttpServletRequest().isTrailerFieldsReady();
    }
}