PdfWriter.java

/*
 * Copyright (C) 2011 Laurent Caillette
 *
 * This program 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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.novelang.rendering;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;
import javax.xml.transform.TransformerConfigurationException;

import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;

import org.novelang.common.metadata.DocumentMetadata;
import org.novelang.configuration.RenderingConfiguration;
import org.novelang.outfit.loader.ResourceName;
import org.novelang.outfit.xml.TransformerCompositeException;

/**
 * @author Laurent Caillette
 */
public class PdfWriter extends XslWriter {

  public static final ResourceName DEFAULT_FO_STYLESHEET = new ResourceName( "pdf.xsl" ) ;
  protected final FopFactory fopFactory ;

  public PdfWriter(
      final RenderingConfiguration configuration,
      final ResourceName stylesheet,
      final String namespaceUri,
      final String nameQualifier
  ) throws IOException, TransformerConfigurationException, SAXException, TransformerCompositeException {
    super(
        namespaceUri,
        nameQualifier,
        configuration,
        null == stylesheet ? DEFAULT_FO_STYLESHEET : stylesheet
    ) ;
    fopFactory = configuration.getFopFactory() ;
  }

  public PdfWriter( final RenderingConfiguration configuration, final ResourceName stylesheet )
      throws IOException, TransformerConfigurationException, SAXException, TransformerCompositeException
  {
    super( configuration, null == stylesheet ? DEFAULT_FO_STYLESHEET : stylesheet ) ;
    fopFactory = configuration.getFopFactory() ;
  }

// ==========
// Generation
// ==========

  @Override
  protected final ContentHandler createSinkContentHandler(
      final OutputStream outputStream,
      final DocumentMetadata documentMetadata,
      final Charset charset
  )
      throws FOPException
  {
    final FOUserAgent foUserAgent = fopFactory.newFOUserAgent() ;
    foUserAgent.setTargetResolution( 300 ) ; // dpi

    final Fop fop ;
    try {
      fop = fopFactory.newFop( MimeConstants.MIME_PDF, foUserAgent, outputStream ) ;
    } catch( FOPException e ) {
      throw new RuntimeException( e );
    }

    return fop.getDefaultHandler() ;

  }


}