DefaultExportHandler.java example

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/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.platform.plugin.services.importexport;
/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright 2013 Pentaho Corporation.  All rights reserved.
 *
 * User: pminutillo
 * Date: 1/16/13
 * Time: 4:52 PM
 */

import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.platform.api.repository2.unified.Converter;
import org.pentaho.platform.api.repository2.unified.IRepositoryContentConverterHandler;
import org.pentaho.platform.api.repository2.unified.IUnifiedRepository;
import org.pentaho.platform.api.repository2.unified.RepositoryFile;
import org.pentaho.platform.engine.core.system.PentahoSystem;
import org.pentaho.platform.repository.RepositoryFilenameUtils;

public class DefaultExportHandler implements ExportHandler {
  private static final Log log = LogFactory.getLog( DefaultExportHandler.class );

  private Map<String, Converter> converters;

  private IUnifiedRepository repository;

  private List<String> localeExportList;

  /**
   * Perform export with registered handlers
   */
  @Override
  public InputStream doExport( RepositoryFile repositoryFile, String filePath ) throws ExportException, IOException {
    InputStream is = null;

    // Compute the file extension
    final String name = repositoryFile.getName();
    final String ext = RepositoryFilenameUtils.getExtension( name );
    if ( StringUtils.isEmpty( ext ) ) {
      log.debug( "Skipping file without extension: " + name );
    }

    // Find the converter - defined in spring xml by import handlers
    if ( converters == null ) {
      IRepositoryContentConverterHandler converterHandler = PentahoSystem.get( IRepositoryContentConverterHandler.class );
      converters = converterHandler.getConverters();
    }
    final Converter converter = converters.get( ext );
    if ( converter == null ) {
      log.debug( "Skipping file without converter: " + name );
      return null;
    }

    // just send the converter the file id and let it decide which type to get
    // since it is already based on the file extension
    return converter.convert( repositoryFile.getId() );
  }

  public void setConverters( Map<String, Converter> converters ) {
    this.converters = converters;
  }

  public void setRepository( IUnifiedRepository repository ) {
    this.repository = repository;
  }

  public List<String> getLocaleExportList() {
    return localeExportList;
  }

  public void setLocaleExportList( List<String> localeExportList ) {
    this.localeExportList = localeExportList;
  }

}