/*
 * File    : ResourceRP.java
 * Created : 23-jan-2003 10:42
 * By      : fbusquets
 *
 * JClic - Authoring and playing system for educational activities
 *
 * Copyright (C) 2000 - 2005 Francesc Busquets & Departament
 * d'Educacio de la Generalitat de Catalunya
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details (see the LICENSE file).
 */

package edu.xtec.servlet;

import java.util.HashMap;

/**
 *
 * @author Francesc Busquets (fbusquets@xtec.net)
 */
public class ResourceRP extends RequestProcessor{
    
    protected String objectName;
    protected byte[] objectData;
    public static final String ID="id",
    LAST_MODIFIED="Last-Modified";
    public static final String RESOURCE_BASE="html/";
    
    protected static HashMap objects=new HashMap();
    protected static String dateStr=httpDate(new java.util.Date());
    
    /** Creates a new instance of ResourceRP */
    public ResourceRP() {
        super();
    }
    
    public boolean noCache(){
        return false;
    }    
    
    public boolean init() throws Exception{        
        objectName=getParam(ID);
        if(objectName!=null){
            objectData=(byte[])objects.get(objectName);
            if(objectData==null){
                try{
                    StringBuffer sb=new StringBuffer(RESOURCE_BASE);
                    sb.append(objectName);
                    objectData=edu.xtec.util.ResourceManager.getResourceBytes(sb.substring(0));
                    objects.put(objectName, objectData);
                } catch(Exception ex){
                    errCode=HTTP_NOT_FOUND;
                    errMsg=objectName+" not found!";
                }
            }
        }
        else{
            errCode=HTTP_BAD_REQUEST;
            errMsg="Unespecified object id!";
        }
        return true;
    };
        
    public void header(java.util.Vector v){
        super.header(v);
        if(objectData!=null){
            String ct=null;
            if(objectName.endsWith(".gif"))
                ct="image/gif";
            else if(objectName.endsWith(".jpg"))
                ct="text/jpg";
            else if(objectName.endsWith(".css"))
                ct="text/css";
            if(ct!=null){
                v.add(new String[]{CONTENT_TYPE, ct});
            }
            v.add(new String[]{CONTENT_LENGTH, Integer.toString(objectData.length)});
            v.add(new String[]{EXTRA, LAST_MODIFIED, dateStr});
        }
    }
        
    public boolean usesWriter(){
        return false;
    }

    public void process(java.io.OutputStream out) throws Exception {        
        if(objectData!=null)
            out.write(objectData, 0, objectData.length);
    }
    
}