ImageConverter.java :  » Report » jasperreports-3.7.2 » net » sf » jasperreports » engine » convert » Java Open Source

/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports 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.
 *
 * JasperReports 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.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Contributors:
 * Eugene D - eugenedruy@users.sourceforge.net 
 * Adrian Jackson - iapetus@users.sourceforge.net
 * David Taylor - exodussystems@users.sourceforge.net
 * Lars Kristensen - llk@users.sourceforge.net
 */
package net.sf.jasperreports.engine.convert;

import net.sf.jasperreports.engine.JRElement;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRImage;
import net.sf.jasperreports.engine.JRImageRenderer;
import net.sf.jasperreports.engine.JRPrintElement;
import net.sf.jasperreports.engine.JRPrintImage;
import net.sf.jasperreports.engine.JRRenderable;
import net.sf.jasperreports.engine.base.JRBasePrintImage;
import net.sf.jasperreports.engine.type.OnErrorTypeEnum;
import net.sf.jasperreports.engine.type.ScaleImageEnum;
import net.sf.jasperreports.engine.util.JRExpressionUtil;
import net.sf.jasperreports.engine.util.JRImageLoader;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;


/**
 * @author Teodor Danciu (teodord@users.sourceforge.net)
 * @version $Id: ImageConverter.java 3687 2010-04-06 09:50:42Z shertage $
 */
public final class ImageConverter extends ElementConverter
{
  private static final Log log = LogFactory.getLog(ImageConverter.class);

  /**
   *
   */
  private final static ImageConverter INSTANCE = new ImageConverter();
  
  /**
   *
   */
  private ImageConverter()
  {
  }

  /**
   *
   */
  public static ImageConverter getInstance()
  {
    return INSTANCE;
  }
  
  /**
   *
   */
  public JRPrintElement convert(ReportConverter reportConverter, JRElement element)
  {
    JRBasePrintImage printImage = new JRBasePrintImage(reportConverter.getDefaultStyleProvider());
    JRImage image = (JRImage)element;

    copyGraphicElement(reportConverter, image, printImage);

    printImage.copyBox(image.getLineBox());
    
    printImage.setAnchorName(JRExpressionUtil.getExpressionText(image.getAnchorNameExpression()));
    printImage.setBookmarkLevel(image.getBookmarkLevel());
    printImage.setHorizontalAlignment(image.getOwnHorizontalAlignmentValue());
    printImage.setLazy(image.isLazy());
    printImage.setLinkType(image.getLinkType());
    printImage.setOnErrorType(OnErrorTypeEnum.ICON);
    printImage.setVerticalAlignment(image.getOwnVerticalAlignmentValue());
    printImage.setRenderer(getRenderer(image, printImage));
    printImage.setScaleImage(image.getOwnScaleImageValue());
    
    return printImage;
  }

  /**
   * 
   */
  private JRRenderable getRenderer(JRImage imageElement, JRPrintImage printImage)
  {
    String location = JRExpressionUtil.getSimpleExpressionText(imageElement.getExpression());
    if(location != null)
    {
      try
      {
        return JRImageRenderer.getInstance(location);
        /*
        byte[] imageData = JRLoader.loadBytesFromLocation(location); 
        Image awtImage = JRImageLoader.loadImage(imageData);
        if (awtImage == null)
        {
          printImage.setScaleImage(JRImage.SCALE_IMAGE_CLIP);
          return 
            JRImageRenderer.getInstance(
              JRImageLoader.NO_IMAGE_RESOURCE, 
              imageElement.getOnErrorType()
              );
        }
        return JRImageRenderer.getInstance(imageData);
        */
      }
      catch (JRException e)
      {
        if (log.isDebugEnabled())
        {
          log.debug("Creating location renderer for converted image failed.", e);
        }
      }
    }
    
    try
    {
      printImage.setScaleImage(ScaleImageEnum.CLIP);
      return 
        JRImageRenderer.getInstance(
          JRImageLoader.NO_IMAGE_RESOURCE, 
          imageElement.getOnErrorTypeValue()
          );
    }
    catch (JRException e)
    {
      if (log.isDebugEnabled())
      {
        log.debug("Creating icon renderer for converted image failed.", e);
      }
    }
    
    return null;
  }

}