Package com.github.dandelion.datatables.extras.export.itext

Source Code of com.github.dandelion.datatables.extras.export.itext.PdfExport

/*
* [The "BSD licence"]
* Copyright (c) 2013-2014 Dandelion
* 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, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Dandelion 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 AUTHOR ``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 AUTHOR 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.
*/
package com.github.dandelion.datatables.extras.export.itext;

import java.io.OutputStream;

import com.github.dandelion.datatables.core.exception.ExportException;
import com.github.dandelion.datatables.core.export.DatatablesExport;
import com.github.dandelion.datatables.core.export.ExportConf;
import com.github.dandelion.datatables.core.export.ExportConf.Orientation;
import com.github.dandelion.datatables.core.export.ReservedFormat;
import com.github.dandelion.datatables.core.html.HtmlColumn;
import com.github.dandelion.datatables.core.html.HtmlRow;
import com.github.dandelion.datatables.core.html.HtmlTable;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;

/**
* Default PDF export implementation.
*
* @author Thibault Duchateau
*/
public class PdfExport implements DatatablesExport {

  private HtmlTable table;
  private ExportConf exportConf;

  @Override
  public void initExport(HtmlTable table) {
    this.table = table;
    this.exportConf = table.getTableConfiguration().getExportConfiguration().get(ReservedFormat.PDF);
  }

  @Override
  public void processExport(OutputStream output) {

    Document document = null;
    if (exportConf.getOrientation() != null && exportConf.getOrientation().equals(Orientation.LANDSCAPE)) {
      document = new Document(PageSize.LETTER.rotate());
    }
    else{
      document = new Document();
    }
   
    PdfWriter pdfWriter;
    try {
      pdfWriter = PdfWriter.getInstance(document, output);
      pdfWriter.setViewerPreferences(PdfWriter.PageLayoutSinglePage);

      document.open();
      addTitle(document);
      addTable(document);

    } catch (DocumentException e) {
      StringBuilder sb = new StringBuilder("Something went wrong during the PDF generation of the table '");
      sb.append(table.getOriginalId());
      sb.append("' and with the following export configuration: ");
      sb.append(exportConf.toString());
      throw new ExportException(sb.toString(), e);
    } finally {
      document.close();
    }
  }

  private void addTitle(Document document) throws DocumentException {
    Paragraph title = new Paragraph(exportConf.getFileName());
    title.add(new Paragraph(" ")); // empty line
    title.setAlignment(Element.ALIGN_CENTER);
    document.add(title);
  }

  private void addTable(Document document) throws DocumentException {

    PdfPCell cell = null;

    // Compute the column count in order to initialize the iText table
    int columnCount = table.getLastHeaderRow().getColumns(ReservedFormat.ALL, ReservedFormat.PDF).size();

    if (columnCount != 0) {

      PdfPTable pdfTable = new PdfPTable(columnCount);
      pdfTable.setWidthPercentage(100f);

      // Header
      if (exportConf != null && exportConf.getIncludeHeader()) {

        for (HtmlRow htmlRow : table.getHeadRows()) {

          for (HtmlColumn column : htmlRow.getColumns(ReservedFormat.ALL, ReservedFormat.PDF)) {

            cell = new PdfPCell();
            cell.setPhrase(new Phrase(column.getContent().toString()));
            pdfTable.addCell(cell);
          }
        }
      }

      for (HtmlRow htmlRow : table.getBodyRows()) {

        for (HtmlColumn column : htmlRow.getColumns(ReservedFormat.ALL, ReservedFormat.PDF)) {

          cell = new PdfPCell();
          cell.setPhrase(new Phrase(column.getContent().toString()));
          pdfTable.addCell(cell);
        }
      }

      document.add(pdfTable);
    }
  }
}
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