# FwdJasperRepositoryService.java

    /*
    ** Module   : FwdJasperRepositoryService.java
    ** Abstract : Repository service which allows to get Jasper files using FWD infrastructure.
    **
    ** Copyright (c) 2017-2024, Golden Code Development Corporation.
    **
    ** -#- -I- --Date-- ---------------------------------Description----------------------------------
    ** 001 SVL 20171108 Created initial version.
    ** 002 SVL 20180209 getInputStream throws exception in case of error.
    ** 003 EVL 20180507 Adding attempt to load resource from application jar first.
    ** 004 EVL 20180518 Adding ability to work in standalone mode without server and client running.
    ** 005 EVL 20180525 Replacing abend with XPR error logger.
    ** 006 EVL 20180625 Restoring the simple mode functionality after resource loading refactoring.
    **                  Adding protection for missing files from abend.
    ** 007 EVL 20190116 Adding initial data check for empty uri for input stream to get to avoid
    **                  data reading issues.
    ** 008 TJD 20240221 Fix for compile warning for a new JasperRepors API
    */
    /*
    ** This program is free software: you can redistribute it and/or modify
    ** it under the terms of the GNU Affero General Public License as
    ** published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
    **
    ** You may find a copy of the GNU Affero GPL version 3 at the following
    ** location: https://www.gnu.org/licenses/agpl-3.0.en.html
    **
    ** Additional terms under GNU Affero GPL version 3 section 7:
    **
    **   Under Section 7 of the GNU Affero GPL version 3, the following additional
    **   terms apply to the works covered under the License.  These additional terms
    **   are non-permissive additional terms allowed under Section 7 of the GNU
    **   Affero GPL version 3 and may not be removed by you.
    **
    **   0. Attribution Requirement.
    **
    **     You must preserve all legal notices or author attributions in the covered
    **     work or Appropriate Legal Notices displayed by works containing the covered
    **     work.  You may not remove from the covered work any author or developer
    **     credit already included within the covered work.
    **
    **   1. No License To Use Trademarks.
    **
    **     This license does not grant any license or rights to use the trademarks
    **     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
    **     of Golden Code Development Corporation. You are not authorized to use the
    **     name Golden Code, FWD, or the names of any author or contributor, for
    **     publicity purposes without written authorization.
    **
    **   2. No Misrepresentation of Affiliation.
    **
    **     You may not represent yourself as Golden Code Development Corporation or FWD.
    **
    **     You may not represent yourself for publicity purposes as associated with
    **     Golden Code Development Corporation, FWD, or any author or contributor to
    **     the covered work, without written authorization.
    **
    **   3. No Misrepresentation of Source or Origin.
    **
    **     You may not represent the covered work as solely your work.  All modified
    **     versions of the covered work must be marked in a reasonable way to make it
    **     clear that the modified work is not originating from Golden Code Development
    **     Corporation or FWD.  All modified versions must contain the notices of
    **     attribution required in this license.
    */

    package com.goldencode.p2j.reporting;

    import com.goldencode.p2j.ui.*;
    import com.goldencode.p2j.util.*;
    import net.sf.jasperreports.engine.*;
    import net.sf.jasperreports.repo.*;
    import java.io.*;
    import java.nio.file.*;

    /**
     * Repository service which allows to get Jasper files using FWD infrastructure.
     */
    class FwdJasperRepositoryService
    extends DefaultRepositoryService
    {
       /**
        * Default constructor.
        *
        * @param jasperReportsContext
        *        Parent JasperReports context.
        */
       FwdJasperRepositoryService(JasperReportsContext jasperReportsContext)
       {
          super(jasperReportsContext);

          // in JasperReports 6.21 its not in use if not ever set
          // disable access to server-side file system
          //setFileResolver(s -> null);
       }

       /**
        * Get input stream of the specified resource.
        *
        * @param  uri
        *         The name of the resource to load. Resource lookup happens in the following order:
        *         <ol>
        *            <li>Check if resource name is URL.</li>
        *            <li>Check if resource name is a name of the file inside a server-side jar in the
        *            server class path.</li>
        *            <li>Check if resource name is a name of the file in the client-side file
        *            system.</li>
        *         </ol>
        *         Resource can NOT be a file in the server-side file system.
        *
        * @return input stream of the specified resource.
        *
        * @throws JasperReportException
        *         if the resource cannot be found or loaded.
        */
       @Override
       public InputStream getInputStream(String uri)
       throws JasperReportException
       {
          InputStream res = null;

          // make simple input data checks
          if (uri == null || uri.isEmpty())
          {
             return null;
          }

          // detect simple command line mode usage
          boolean inSimpleMode = XprHelper.isSimpleUseMode();
          try
          {
             // get file from URL or server jars if not in simple command line mode
             if (!inSimpleMode)
             {
                res = LogicalTerminal.getResourceStreamFromApplication(uri);
             }
             if (res == null)
             {
                res = super.getInputStream(uri);
             }
          }
          catch (JRRuntimeException e)
          {
             XprHelper.displayOrLogError(
                String.format("Error while loading file %s from URL or server jars", uri), e);
             return res;
          }

          if (res == null)
          {
             try
             {
                // simple mode has different route here
                if (inSimpleMode)
                {
                   File file = new File(uri);
                   res = new ByteArrayInputStream(Files.readAllBytes(file.toPath()));
                   if (res != null)
                   {
                      return res;
                   }
                   else
                   {
                      XprHelper.displayOrLogError(
                         String.format("File %s was not found by URL", uri), false);
                      return null;
                   }
                }

                // get file from client file system
                res = new ByteArrayInputStream(FileSystemOps.getFileContents(uri));
                //TODO do we need caching for client-side images?
             }
             catch (IOException e)
             {
                XprHelper.displayOrLogError(
                   String.format("File %s was not found by URL, in server jars and client file system",
                                 uri), e, false);
             }
          }
          return res;
       }
    }