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litesoft / trunk / Java / GWT / Server / src / org / litesoft / GWT / server / ReportServlet.java 

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// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.server;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

import org.litesoft.commonfoundation.typeutils.*;
import org.litesoft.logger.*;
import org.litesoft.reports.*;
import org.litesoft.uispecification.*;

public class ReportServlet extends HttpServlet
{
    protected static Logger logger = LoggerFactory.getLogger( ReportServlet.class );

    private static final long serialVersionUID = 1L;

    private PrintWriter responseInit( HttpServletResponse pResponse, String pTitle )
            throws IOException
    {
        pResponse.setContentType( "text/html" );
        PrintWriter out = pResponse.getWriter();
        out.println( "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">" );
        out.println( "<html>" );
        out.println( "  <head>" );
        out.println( "    <title>" + pTitle + "</title>" );
        out.println( "    <link rel=\"stylesheet\" type=\"text/css\" href=\"../../common/litesoft_reporting.css\" />" );
        out.println( "  </head>" );
        out.println( "  <body>" );
        return out;
    }

    private void responseFini( PrintWriter pOut )
    {
        pOut.println( "  </body>" );
        pOut.println( "</html>" );
        pOut.flush();
        pOut.close();
    }

    /**
     * The doPost method of the servlet.
     */
    @Override
    public void doPost( HttpServletRequest pRequest, HttpServletResponse pResponse )
            throws ServletException, IOException
    {
        PrintWriter out = responseInit( pResponse, "Report" );
        out.println( "    Post Not Supported" );
        responseFini( out );
    }

    /**
     * The doGet method of the servlet.
     */
    @Override
    public void doGet( HttpServletRequest pRequest, HttpServletResponse pResponse )
            throws ServletException, IOException
    {
        String zPathInfo = Strings.deNull( pRequest.getPathInfo() );

        ServletSessionHelper.chkInitialized();
        ServletSessionHelper.callInit( pRequest.getSession( true ) );
        try
        {
            PrintWriter out;

            ReportParamPair zPair = extractReportParamPair( zPathInfo );

            String zReportID = (zPair != null) ? zPair.getReportID() : "";

            String zTitle = "Report: " + zReportID;

            ServerReportFactory zReportFactory = ServerReportFactory.Registry.getFactory( zReportID );
            if ( zReportFactory == null )
            {
                out = responseInit( pResponse, zTitle );
                out.println( "    No Report for ReportID: " + zReportID );
            }
            else
            {
                ServerReport zReport;
                try
                {
                    zReport = zReportFactory.create( zPair.getParams() );
                    zTitle = zReport.pageTitle();
                }
                catch ( RuntimeException e )
                {
                    out = responseInit( pResponse, zTitle );
                    e.printStackTrace( out );
                    responseFini( out );
                    return;
                }
                out = responseInit( pResponse, zTitle );
                try
                {
                    zReport.render( out );
                }
                catch ( RuntimeException e )
                {
                    e.printStackTrace( out );
                }
            }
            responseFini( out );
        }
        finally
        {
            ServletSessionHelper.callFini();
        }
    }

    private ReportParamPair extractReportParamPair( String pPathInfo )
    {
        if ( pPathInfo.startsWith( "/" ) && pPathInfo.endsWith( ".html" ) )
        {
            int zAt = pPathInfo.lastIndexOf( '/' );
            if ( zAt != -1 )
            {
                String zParams = pPathInfo.substring( 1, zAt ).trim();
                String zReportID = dropWhen( pPathInfo.substring( zAt + 1, pPathInfo.length() - 5 ).trim() );
                // x-1234-12-12-12-12
                // 123456789012345678
                if ( zReportID != null )
                {
                    return new ReportParamPair( zReportID, UriFragmentIdParams.fromParamsString( zParams ) );
                }
            }
        }
        return null;
    }

    private String dropWhen( String pReportID )
    {
        // x-1234-12-12-12-12
        // 123456789012345678
        int zWhenDashSepAt = pReportID.length() - 17;
        if ( (zWhenDashSepAt > 0) && validWhenTail( pReportID.substring( zWhenDashSepAt ) ) )
        {
            return pReportID.substring( 0, zWhenDashSepAt );
        }
        return null;
    }

    private boolean validWhenTail( String zTail )
    {
        // ............... -1234-12-12-12-12
        String zPattern = "-9999-99-99-99-99";
        for ( int i = 0; i < zPattern.length(); i++ )
        {
            char zPatternChar = zPattern.charAt( i );
            char zTailChar = zTail.charAt( i );
            if ( zPatternChar == '9' )
            {
                if ( !Characters.isNumeric( zTailChar ) )
                {
                    return false;
                }
            }
            else if ( zPatternChar != zTailChar )
            {
                return false;
            }
        }
        return true;
    }

    private static class ReportParamPair
    {
        private String mReportID;
        private UriFragmentIdParams mParams;

        private ReportParamPair( String pReportID, UriFragmentIdParams pParams )
        {
            mReportID = pReportID;
            mParams = pParams;
        }

        public String getReportID()
        {
            return mReportID;
        }

        public UriFragmentIdParams getParams()
        {
            return mParams;
        }
    }
}

Commits for litesoft/trunk/Java/GWT/Server/src/org/litesoft/GWT/server/ReportServlet.java

Diff revisions: vs.
Revision Author Commited Message
947 Diff Diff GeorgeS picture GeorgeS Fri 06 Jun, 2014 23:36:56 +0000

Correct Spelling of package!
939 Diff Diff GeorgeS picture GeorgeS Mon 02 Jun, 2014 21:30:31 +0000

Extracting commonfoundation
811 Diff Diff GeorgeS picture GeorgeS Sat 18 Aug, 2012 13:45:18 +0000
802 Diff Diff GeorgeS picture GeorgeS Wed 15 Aug, 2012 04:04:47 +0000
49 Diff Diff GeorgeS picture GeorgeS Mon 12 Apr, 2010 02:59:10 +0000

License Text
25 Diff Diff GeorgeS picture GeorgeS Mon 01 Mar, 2010 14:09:51 +0000
2 GeorgeS picture GeorgeS Sun 07 Feb, 2010 12:50:58 +0000

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