cmschtype.java

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/*
* File   : $Source: /usr/local/cvs/opencms/src/com/opencms/workplace/CmsChtype.java,v $
* Date   : $Date: 2001/07/31 15:50:18 $
* Version: $Revision: 1.16 $
*
* This library is part of OpenCms -
* the Open Source Content Mananagement System
*
* Copyright (C) 2001  The OpenCms Group
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* For further information about OpenCms, please see the
* OpenCms Website: http://www.opencms.org 
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


package com.opencms.workplace;

import com.opencms.file.*;
import com.opencms.core.*;
import com.opencms.util.*;
import com.opencms.template.*;
import javax.servlet.http.*;
import java.util.*;

/**
 * Template class for displaying the type screen of the OpenCms workplace.<P>
 * Reads template files of the content type <code>CmsXmlWpTemplateFile</code>.
 *
 * @author Michael Emmerich
 * @version $Revision: 1.16 $ $Date: 2001/07/31 15:50:18 $
 */

public class CmsChtype extends CmsWorkplaceDefault implements I_CmsWpConstants,I_CmsConstants {


    /** Definition of the Datablock RADIOSIZE */
    private final static String C_RADIOSIZE = "RADIOSIZE";


    /** Vector containing all names of the radiobuttons */
    private Vector m_names = null;


    /** Vector containing all links attached to the radiobuttons */
    private Vector m_values = null;

    /**
     * Overwrites the getContent method of the CmsWorkplaceDefault.<br>
     * Gets the content of the chtype template and processed the data input.
     * @param cms The CmsObject.
     * @param templateFile The chtype template file
     * @param elementName not used
     * @param parameters Parameters of the request and the template.
     * @param templateSelector Selector of the template tag to be displayed.
     * @return Bytearre containgine the processed data of the template.
     * @exception Throws CmsException if something goes wrong.
     */

    public byte[] getContent(CmsObject cms, String templateFile, String elementName,
            Hashtable parameters, String templateSelector) throws CmsException {
        I_CmsSession session = cms.getRequestContext().getSession(true);

        // the template to be displayed
        String template = null;

        // clear session values on first load
        String initial = (String)parameters.get(C_PARA_INITIAL);
        if(initial != null) {

            // remove all session values
            session.removeValue(C_PARA_FILE);
            session.removeValue("lasturl");
        }

        // get the lasturl parameter
        String lasturl = getLastUrl(cms, parameters);
        String newtype = (String)parameters.get(C_PARA_NEWTYPE);

        // get the filename
        String filename = (String)parameters.get(C_PARA_FILE);
        if(filename != null) {
            session.putValue(C_PARA_FILE, filename);
        }
        filename = (String)session.getValue(C_PARA_FILE);
        CmsFile file = (CmsFile)cms.readFileHeader(filename);

        // check if the newtype parameter is available. This parameter is set when
        // the new file type is selected
        if(newtype != null) {

            // get the new resource type
            I_CmsResourceType type = cms.getResourceType(newtype);
            cms.chtype(file.getAbsolutePath(), type.getResourceTypeName());
            session.removeValue(C_PARA_FILE);

            // return to filelist
            try {
                if(lasturl == null || "".equals(lasturl)) {
                    cms.getRequestContext().getResponse().sendCmsRedirect(getConfigFile(cms).getWorkplaceActionPath()
                            + C_WP_EXPLORER_FILELIST);
                }
                else {
                    cms.getRequestContext().getResponse().sendRedirect(lasturl);
                }
            }
            catch(Exception e) {
                throw new CmsException("Redirect fails :" + getConfigFile(cms).getWorkplaceActionPath()
                        + C_WP_EXPLORER_FILELIST, CmsException.C_UNKNOWN_EXCEPTION, e);
            }
            return null;
        }
        CmsXmlWpTemplateFile xmlTemplateDocument = new CmsXmlWpTemplateFile(cms, templateFile);

        // set all required datablocks
        xmlTemplateDocument.setData("OWNER", Utils.getFullName(cms.readOwner(file)));
        xmlTemplateDocument.setData("GROUP", cms.readGroup(file).getName());
        xmlTemplateDocument.setData("FILENAME", file.getName());
        getResources(cms, null, null, null, null, null);
        if(m_names != null) {
            xmlTemplateDocument.setData(C_RADIOSIZE, new Integer(m_names.size()).toString());
        }

        // process the selected template
        return startProcessing(cms, xmlTemplateDocument, "", parameters, template);
    }

    /**
     * Gets the resources displayed in the Radiobutton group on the chtype dialog.
     * @param cms The CmsObject.
     * @param lang The langauge definitions.
     * @param names The names of the new rescources (used for optional images).
     * @param values The links that are connected with each resource.
     * @param descriptions Description that will be displayed for the new resource.
     * @param parameters Hashtable of parameters (not used yet).
     * @returns The vectors names and values are filled with the information found in the
     * workplace.ini.
     * @exception Throws CmsException if something goes wrong.
     */

    public void getResources(CmsObject cms, CmsXmlLanguageFile lang, Vector names,
            Vector values, Vector descriptions, Hashtable parameters) throws CmsException {

        // Check if the list of available resources is not yet loaded from the workplace.ini
        if(m_names == null || m_values == null) {
            m_names = new Vector();
            m_values = new Vector();
            CmsXmlWpConfigFile configFile = new CmsXmlWpConfigFile(cms);
            configFile.getWorkplaceIniData(m_names, m_values, "RESOURCETYPES", "RESOURCE");
        }

        // Check if the temportary name and value vectors are not initialized, create

        // them if nescessary.
        if(names == null) {
            names = new Vector();
        }
        if(values == null) {
            values = new Vector();
        }
        if(descriptions == null) {
            descriptions = new Vector();
        }

        // OK. Now m_names and m_values contain all available
        // resource information.
        // Loop through the vectors and fill the result vectors.
        int numViews = m_names.size();
        for(int i = 0;i < numViews;i++) {
            String loopValue = (String)m_values.elementAt(i);
            String loopName = (String)m_names.elementAt(i);
            values.addElement(loopValue);
            names.addElement("file_" + loopName);
            String descr;
            if(lang != null) {
                descr = lang.getLanguageValue("fileicon." + loopName);
            }
            else {
                descr = loopName;
            }
            descriptions.addElement(descr);
        }
    }

    /**
     * Indicates if the results of this class are cacheable.
     *
     * @param cms CmsObject Object for accessing system resources
     * @param templateFile Filename of the template file
     * @param elementName Element name of this template in our parent template.
     * @param parameters Hashtable with all template class parameters.
     * @param templateSelector template section that should be processed.
     * @return <EM>true</EM> if cacheable, <EM>false</EM> otherwise.
     */

    public boolean isCacheable(CmsObject cms, String templateFile, String elementName,
            Hashtable parameters, String templateSelector) {
        return false;
    }
}