historyformatterservlet.java

CRM源码This file describes some issues that should be implemented in future and how it should be imple

/*
 * Copyright 2006-2007 Queplix Corp.
 *
 * Licensed under the Queplix Public License, Version 1.1.1 (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.queplix.com/solutions/commercial-open-source/queplix-public-license/
 *
 * 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 com.queplix.core.modules.eqlext.www;

import com.queplix.core.integrator.security.LogonSession;
import com.queplix.core.integrator.security.WebLoginManager;
import com.queplix.core.modules.eql.ejb.HistoryLocal;
import com.queplix.core.modules.eql.ejb.HistoryLocalHome;
import com.queplix.core.modules.eqlext.ejb.GetRecordsLocal;
import com.queplix.core.modules.eqlext.ejb.GetRecordsLocalHome;
import com.queplix.core.modules.eqlext.jxb.gr.Reqs;
import com.queplix.core.modules.eqlext.jxb.gr.ResField;
import com.queplix.core.modules.eqlext.jxb.gr.Ress;
import com.queplix.core.utils.JNDINames;
import com.queplix.core.utils.www.AbstractServlet;
import com.queplix.core.utils.www.ServletHelper;
import com.queplix.core.utils.xml.XMLHelper;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * History formatter servlet.
 * <strong>USAGE</strong>: <pre>POST /getHistory[/asText|/asHTML]
 * <?xml version="1.0" encoding="UTF-8"?>
 * <reqs>...</reqs>
 * </pre>
 * <p><strong>Parameters</strong>:
 * <p>     One of:
 * <p>        NULL: default transformation
 * <p>     or..
 * <p>        asText: transform to plain text
 * <p>     or..
 * <p>        asHTML: transform to HTML
 * </p>
 * @author [ALB] Baranov Andrey
 * @version $Revision: 1.1.1.1 $ $Date: 2005/09/12 15:30:45 $
 */

public class HistoryFormatterServlet
    extends AbstractServlet {

    // ----------------------------------------------------- constants

    private static final int MODE_UNKNOWN = -1;
    private static final int MODE_TEXT = 0;
    private static final int MODE_HTML = 1;

    private static final String AS_TEXT = "asText";
    private static final String AS_HTML = "asHTML";

    // ----------------------------------------------------- service method

    public void service( HttpServletRequest request, HttpServletResponse response )
        throws IOException, ServletException {

        // Initialization
        LogonSession ls = null;
        try {
            ls = WebLoginManager.getLogonSession( request );
        } catch( Exception ex ) {
            throw new ServletException( ex );
        }
        request.setCharacterEncoding( "UTF-8" );

        GetRecordsLocal getRecordsLocal = ( GetRecordsLocal )
            getLocalObject( JNDINames.GetRecords, GetRecordsLocalHome.class );

        HistoryLocal historyLocal = ( HistoryLocal )
            getLocalObject( JNDINames.History, HistoryLocalHome.class );

        // Get mode
        int mode;
        String pathInfo = request.getPathInfo();
        if( pathInfo != null && pathInfo.indexOf( AS_TEXT ) >= 0 ) {
            mode = MODE_TEXT;
        } else if( pathInfo != null && pathInfo.indexOf( AS_HTML ) >= 0 ) {
            mode = MODE_HTML;
        } else {
            mode = MODE_UNKNOWN;
        }

        if( logger.getLogger().isDebugEnabled() ) {
            logger.DEBUG( "History formatter servlet:" );
            logger.DEBUG( "   mode: " + mode );
        }

        String formattedHistory = null;
        boolean isHTMLMode = false;

        try {
            // Requesting GetRecords.
            Reqs reqs = ( Reqs ) XMLHelper.getParsedObject( Reqs.class, request.getInputStream() );

            // Gettting response.
            Ress ress = getRecordsLocal.process( reqs, ls ).getRess();

            if(ress.getRows() == 1 ) {
                ResField historyResField = ress.getRes().getResRecord( 0 ).getResField( 0 );
                String history = historyResField.getResFieldValue();

                switch( mode ) {
                case MODE_TEXT:
                    isHTMLMode = false;
                    break;
                case MODE_HTML:
                    isHTMLMode = true;
                    break;
                default:
                    isHTMLMode = historyLocal.isHistoryValid( history );
                }

                if( isHTMLMode ) {
                    formattedHistory = historyLocal.toHTML( history );
                } else {
                    formattedHistory = historyLocal.toText( history );
                }
            }

        } catch( Exception ex ) {
            throw new ServletException( ex );
        }

        // Printitng out.
        response.setHeader( "Cache-Control", "no-cache" );
        response.setHeader( "Pragma", "no-cache" );
        response.setContentType( isHTMLMode ? ServletHelper.CONTENT_TYPE_HTML : ServletHelper.CONTENT_TYPE_TEXT );

        if( formattedHistory != null ) {
            response.getWriter().print( formattedHistory );
        }

    } // end of service()

} // end of class