com.idega.block.rss.business.RSSAbstractProducer.java Source code

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Here is the source code for com.idega.block.rss.business.RSSAbstractProducer.java

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/*
 * $Id: RSSAbstractProducer.java,v 1.6 2009/05/15 07:23:44 valdas Exp $
 * Created on Sep 13, 2006
 *
 * Copyright (C) 2006 Idega Software hf. All Rights Reserved.
 *
 * This software is the proprietary information of Idega hf.
 * Use is subject to license terms.
 */
package com.idega.block.rss.business;

import java.io.IOException;
import java.rmi.RemoteException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequestWrapper;

import org.apache.commons.httpclient.HttpException;

import com.idega.block.rss.data.RSSRequest;
import com.idega.business.IBOLookup;
import com.idega.idegaweb.IWApplicationContext;
import com.idega.idegaweb.IWMainApplication;
import com.idega.presentation.IWContext;
import com.idega.slide.business.IWSlideService;
import com.idega.slide.business.IWSlideSession;

/**
 * @see com.idega.block.rss.business.RSSProducer
 * 
 *  Last modified: $Date: 2009/05/15 07:23:44 $ by $Author: valdas $
 * 
 * @author <a href="mailto:eiki@idega.com">eiki</a>
 * @version $Revision: 1.6 $
 */
public abstract class RSSAbstractProducer implements RSSProducer {

    public static final String RSS_CONTENT_TYPE = "application/rss+xml";
    protected IWSlideService service;
    protected IWSlideSession session;

    public RSSAbstractProducer() {
    }

    public abstract void handleRSSRequest(RSSRequest rssRequest) throws IOException;

    /**
     * Sends the request to a new URI
     * @param URI
     * @throws IOException 
     * @throws ServletException 
     */
    public void dispatch(String URI, RSSRequest rssRequest) throws IOException, ServletException {
        rssRequest.getRequestWrapped().getRequestDispatcher(URI).forward(rssRequest.getRequest(),
                rssRequest.getResponse());
    }

    /**
     * Sets the requests contenttype to "application/rss+xml". DO NOT USE if you then call dispatch.
     * @param rssRequest
     */
    public void setAsRSSContentType(RSSRequest rssRequest) {
        rssRequest.getResponse().setContentType(RSS_CONTENT_TYPE);
    }

    public String getRSSContentType() {
        return RSS_CONTENT_TYPE;
    }

    /**
     * Sets the requests contenttype to "text/xml". DO NOT USE if you then call dispatch.
     * @param rssRequest
     */
    public void setAsXMLContentType(RSSRequest rssRequest) {
        rssRequest.getResponse().setContentType("text/xml");
    }

    /**
     * Checks if the file or folder in slide the uri points to exists or not
     * @param URI
     * @return true if the file exists, checks as root
     */
    public boolean existsInSlide(String URI, RSSRequest rssRequest) {

        try {
            return getIWSlideService(rssRequest).getExistence(URI);
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (RemoteException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return false;

    }

    /**
     * 
     * @param URI
     * @return true if the uri points to a folder in slide or false if it does not or the user has no access priviledges to it
     */
    public boolean isAFolderInSlide(String URI, RSSRequest rssRequest) {

        try {
            return getIWSlideSession(rssRequest).isFolder(URI);
        } catch (RemoteException e) {
            e.printStackTrace();
        }

        return false;
    }

    /**
     * 
     * @param URI
     * @param rssRequest
     * @return the full URL with the http protocol, servername and port with the URI suffixed
     */
    public String getServerURLWithURI(String URI, RSSRequest rssRequest) {
        HttpServletRequestWrapper wrapped = rssRequest.getRequestWrapped();

        return "http://" + wrapped.getServerName() + ":" + wrapped.getServerPort() + URI;
    }

    /**
     * Gets a RSSBusiness instance
     * 
     * @return A RSSBusiness instance
     * @throws RemoteException
     */
    public RSSBusiness getRSSBusiness() throws RemoteException {
        return IBOLookup.getServiceInstance(IWMainApplication.getDefaultIWApplicationContext(), RSSBusiness.class);
    }

    /**
     * Gets a IWSlideService instance
     * 
     * @return A IWSlideService instance
     * @throws RemoteException
     */
    public IWSlideService getIWSlideService(RSSRequest rssRequest) throws RemoteException {
        service = IBOLookup.getServiceInstance(
                IWMainApplication.getIWMainApplication(rssRequest.getRequest().getSession().getServletContext())
                        .getIWApplicationContext(),
                IWSlideService.class);
        return service;
    }

    /**
     * Gets a IWSlideSession instance
     * 
     * @return A IWSlideSession instance
     * @throws RemoteException
     */
    public IWSlideSession getIWSlideSession(RSSRequest rssRequest) throws RemoteException {
        session = IBOLookup.getSessionInstance(rssRequest.getRequest().getSession(), IWSlideSession.class);
        return session;
    }

    /**
     * Fetches the IWApplicationContext using the RSSRequest and IWMainApplication
     * @param rssRequest
     * @return IWApplicationContext
     */
    public IWApplicationContext getIWApplicationContext(RSSRequest rssRequest) {
        return IWMainApplication.getIWMainApplication(rssRequest.getRequest().getSession().getServletContext())
                .getIWApplicationContext();
    }

    public IWContext getIWContext(RSSRequest rss) {
        IWContext iwc = null;
        try {
            iwc = IWContext.getInstance();
        } catch (Exception e) {
            //      e.printStackTrace();
        }

        if (iwc == null) {
            iwc = new IWContext(rss.getRequest(), rss.getResponse(),
                    rss.getRequest().getSession().getServletContext());
        }
        return iwc;
    }
}