ca.sqlpower.wabit.dao.session.PNGImageConverter.java Source code

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Here is the source code for ca.sqlpower.wabit.dao.session.PNGImageConverter.java

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/*
 * Copyright (c) 2009, SQL Power Group Inc.
 *
 * This file is part of Wabit.
 *
 * Wabit is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Wabit 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 ca.sqlpower.wabit.dao.session;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import javax.imageio.ImageIO;

import org.apache.commons.beanutils.ConversionException;

import ca.sqlpower.dao.PersisterUtils;
import ca.sqlpower.dao.session.BidirectionalConverter;

/**
 * Converts between an Image and an InputStream.
 */
public class PNGImageConverter implements BidirectionalConverter<InputStream, Image> {

    public Image convertToComplexType(InputStream convertFrom) throws ConversionException {
        try {
            BufferedImage img = ImageIO.read(convertFrom);
            return img;
        } catch (Exception e) {
            throw new ConversionException("Cannot convert the given image", e);
        }
    }

    public InputStream convertToSimpleType(Image convertFrom, Object... additionalInfo) {
        ByteArrayOutputStream byteStream = PersisterUtils.convertImageToStreamAsPNG(convertFrom);
        return new ByteArrayInputStream(byteStream.toByteArray());
    }

}