content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library 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.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.mail;
  
  import org.opencms.file.CmsFile;
  import org.opencms.file.CmsObject;
  import org.opencms.file.CmsResource;
  import org.opencms.main.CmsException;
  import org.opencms.main.OpenCms;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import javax.activation.DataSource;
  
  /**
   * DataSource wrapper for VFS resources, allows easy sending of VFS resources as email attachments.<p>
   *
   * @since 6.2.0
   */
  public class CmsVfsDataSource implements DataSource {
  
      /** The content type to use for the data source. */
      private String m_contentType;
  
      /** The file that accessed by this data source. */
      private CmsFile m_file;
  
      /**
       * Creates a new data source for the given VFS resource.<p>
       *
       * @param cms the current users OpenCms context
       * @param resource the resource to use
       *
       * @throws CmsException in case of errors accessing the resource in the VFS
       */
      public CmsVfsDataSource(CmsObject cms, CmsResource resource)
      throws CmsException {
  
          m_file = cms.readFile(resource);
          // identify the mime-type for the data source
          m_contentType = OpenCms.getResourceManager().getMimeType(
              m_file.getName(),
              cms.getRequestContext().getEncoding());
      }
  
      /**
       * @see javax.activation.DataSource#getContentType()
       */
      public String getContentType() {
  
          return m_contentType;
      }
  
      /**
       * Returns an input stream baded on the file contents.<p>
       *
       * @see javax.activation.DataSource#getInputStream()
       */
      public InputStream getInputStream() {
  
          return new ByteArrayInputStream(m_file.getContents());
      }
  
      /**
       * Returns the root path of the given resource.<p>
       *
       * @see javax.activation.DataSource#getName()
       */
      public String getName() {
  
          return m_file.getRootPath();
      }
  
      /**
       * Don't use this method, VFS resources can't be written using this datasource class.<p>
       *
       * This method will just return a new <code>{@link ByteArrayOutputStream}</code>.<p>
       *
       * @see javax.activation.DataSource#getOutputStream()
       */
      public OutputStream getOutputStream() {
  
          // maybe throw an Exception here to avoid errors
          return new ByteArrayOutputStream();
      }
  }