ExportFormatService.java

/*
 * Copyright (c) 2002-2020, City of Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.plugins.jasper.service;

import fr.paris.lutece.portal.service.spring.SpringContextService;
import fr.paris.lutece.portal.service.util.AppLogService;
import fr.paris.lutece.portal.service.util.AppPathService;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import java.io.File;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Service fetching the declared section
 */
@SuppressWarnings( "unchecked" )
public enum ExportFormatService
{
    INSTANCE;

    private static final String CORE = "core";
    private static Map<String, ApplicationContext> _mapContext = new HashMap<String, ApplicationContext>( );
    private static final String PATH_CONF = "/WEB-INF/conf/";
    private static final String DIR_PLUGINS = "plugins/";
    private static final String SUFFIX_CONTEXT_FILE = "_context.xml";

    /**
     * Gets a Spring Application context from a given name
     * 
     * @param strContextName
     *            The context's name
     * @return The context
     */
    private static ApplicationContext getContext( String strContextName )
    {
        // Try to get the context from the cache
        ApplicationContext context = (ApplicationContext) _mapContext.get( strContextName );

        if ( context == null )
        {
            // If not found then load the context from the XML file
            String strContextFilePath = AppPathService.getAbsolutePathFromRelativePath( PATH_CONF );

            if ( !strContextName.equals( CORE ) )
            {
                strContextFilePath += DIR_PLUGINS;
            }

            String strContextFile = strContextFilePath + strContextName + SUFFIX_CONTEXT_FILE;

            try
            {
                if ( strContextName.equals( CORE ) )
                {
                    context = new FileSystemXmlApplicationContext( "file:" + strContextFile );
                }
                else
                {
                    List<String> listModules = new ArrayList<String>( );
                    File dir = new File( strContextFilePath );
                    String [ ] arrayFiles = dir.list( );

                    if ( arrayFiles != null )
                    {
                        for ( int i = 0; i < arrayFiles.length; i++ )
                        {
                            String strPath = arrayFiles [i];

                            if ( strPath.startsWith( strContextName ) && strPath.endsWith( "_context.xml" ) )
                            {
                                String strFullPath = "file:" + strContextFilePath + strPath;
                                listModules.add( strFullPath );
                            }
                        }
                    }

                    String [ ] arrayModules = new String [ listModules.size( )];
                    listModules.toArray( arrayModules );
                    context = new FileSystemXmlApplicationContext( arrayModules );
                }
            }
            catch( Exception e )
            {
                AppLogService.error( "Error retrieving context file : " + e.getMessage( ), e );
            }
            finally
            {
                _mapContext.put( strContextName, context );
            }

            _mapContext.put( strContextName, context );
        }

        return context;
    }

    public List<ILinkJasperReport> getExportTypes( )
    {
        return SpringContextService.getBeansOfType( ILinkJasperReport.class );

    }
}