/*
 *  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.coyote.tomcat4;


import java.io.IOException;
import java.io.PrintWriter;
import java.util.Locale;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;

import org.apache.catalina.connector.ResponseFacade;

/**
 * Facade class that wraps a Coyote response object. 
 * All methods are delegated to the wrapped response.
 *
 * @author Remy Maucherat
 * @version $Revision$ $Date$
 */

public class CoyoteResponseFacade 
    extends ResponseFacade
    implements HttpServletResponse {


    // ----------------------------------------------------------- Constructors


    /**
     * Construct a wrapper for the specified response.
     *
     * @param response The response to be wrapped
     */
    public CoyoteResponseFacade(CoyoteResponse response) {

        super(response);
        this.response = response;

    }


    // ----------------------------------------------------- Instance Variables


    /**
     * The wrapped response.
     */
    protected CoyoteResponse response = null;


    // --------------------------------------------------------- Public Methods


    /**
     * Clear facade.
     */
    public void clear() {
        response = null;
    }


    public void finish() {

        response.setSuspended(true);

    }


    public boolean isFinished() {

        return response.isSuspended();

    }


    // ------------------------------------------------ ServletResponse Methods


    public String getCharacterEncoding() {
        return response.getCharacterEncoding();
    }


    public ServletOutputStream getOutputStream()
        throws IOException {

        //        if (isFinished())
        //            throw new IllegalStateException
        //                (/*sm.getString("responseFacade.finished")*/);

        ServletOutputStream sos = response.getOutputStream();
        if (isFinished())
            response.setSuspended(true);
        return (sos);

    }


    public PrintWriter getWriter()
        throws IOException {

        //        if (isFinished())
        //            throw new IllegalStateException
        //                (/*sm.getString("responseFacade.finished")*/);

        PrintWriter writer = response.getWriter();
        if (isFinished())
            response.setSuspended(true);
        return (writer);

    }


    public void setContentLength(int len) {

        if (isCommitted())
            return;

        response.setContentLength(len);

    }


    public void setContentType(String type) {

        if (isCommitted())
            return;

        response.setContentType(type);

    }


    public void setBufferSize(int size) {

        if (isCommitted())
            throw new IllegalStateException
                (/*sm.getString("responseBase.reset.ise")*/);

        response.setBufferSize(size);

    }


    public int getBufferSize() {
        return response.getBufferSize();
    }


    public void flushBuffer()
        throws IOException {

        if (isFinished())
            //            throw new IllegalStateException
            //                (/*sm.getString("responseFacade.finished")*/);
            return;

        response.setAppCommitted(true);

        response.flushBuffer();

    }


    public void resetBuffer() {

        if (isCommitted())
            throw new IllegalStateException
                (/*sm.getString("responseBase.reset.ise")*/);

        response.resetBuffer();

    }


    public boolean isCommitted() {
        return (response.isAppCommitted());
    }


    public void reset() {

        if (isCommitted())
            throw new IllegalStateException
                (/*sm.getString("responseBase.reset.ise")*/);

        response.reset();

    }


    public void setLocale(Locale loc) {

        if (isCommitted())
            return;

        response.setLocale(loc);
    }


    public Locale getLocale() {
        return response.getLocale();
    }


    public void addCookie(Cookie cookie) {

        if (isCommitted())
            return;

        response.addCookie(cookie);

    }


    public boolean containsHeader(String name) {
        return response.containsHeader(name);
    }


    public String encodeURL(String url) {
        return response.encodeURL(url);
    }


    public String encodeRedirectURL(String url) {
        return response.encodeRedirectURL(url);
    }


    public String encodeUrl(String url) {
        return response.encodeURL(url);
    }


    public String encodeRedirectUrl(String url) {
        return response.encodeRedirectURL(url);
    }


    public void sendError(int sc, String msg)
        throws IOException {

        if (isCommitted())
            throw new IllegalStateException
                (/*sm.getString("responseBase.reset.ise")*/);

        response.setAppCommitted(true);

        response.sendError(sc, msg);

    }


    public void sendError(int sc)
        throws IOException {

        if (isCommitted())
            throw new IllegalStateException
                (/*sm.getString("responseBase.reset.ise")*/);

        response.setAppCommitted(true);

        response.sendError(sc);

    }


    public void sendRedirect(String location)
        throws IOException {

        if (isCommitted())
            throw new IllegalStateException
                (/*sm.getString("responseBase.reset.ise")*/);

        response.setAppCommitted(true);

        response.sendRedirect(location);

    }


    public void setDateHeader(String name, long date) {

        if (isCommitted())
            return;

        response.setDateHeader(name, date);

    }


    public void addDateHeader(String name, long date) {

        if (isCommitted())
            return;

        response.addDateHeader(name, date);

    }


    public void setHeader(String name, String value) {

        if (isCommitted())
            return;

        response.setHeader(name, value);

    }


    public void addHeader(String name, String value) {

        if (isCommitted())
            return;

        response.addHeader(name, value);

    }


    public void setIntHeader(String name, int value) {

        if (isCommitted())
            return;

        response.setIntHeader(name, value);

    }


    public void addIntHeader(String name, int value) {

        if (isCommitted())
            return;

        response.addIntHeader(name, value);

    }


    public void setStatus(int sc) {

        if (isCommitted())
            return;

        response.setStatus(sc);

    }


    public void setStatus(int sc, String sm) {

        if (isCommitted())
            return;

        response.setStatus(sc, sm);

    }


}