fr.opensagres.xdocreport.document.images.AbstractInputStreamImageProvider Maven / Gradle / Ivy

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/**
 * Copyright (C) 2011-2015 The XDocReport Team 
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package fr.opensagres.xdocreport.document.images;

import fr.opensagres.xdocreport.core.io.IOUtils;
import fr.opensagres.xdocreport.core.logging.LogUtils;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;

public abstract class AbstractInputStreamImageProvider
    extends AbstractImageProvider
{

    private static final Logger LOGGER = LogUtils.getLogger( AbstractInputStreamImageProvider.class );

    public AbstractInputStreamImageProvider( boolean keepTemplateImageSize )
    {
        super( keepTemplateImageSize );
    }

    public void write( OutputStream outputStream )
        throws IOException
    {
        InputStream inputStream = null;
        try
        {
            inputStream = getInputStream();
            IOUtils.copy( inputStream, outputStream );
        }
        finally
        {
            IOUtils.closeQuietly( inputStream );
        }
    }

    protected abstract InputStream getInputStream()
        throws IOException;

    protected boolean doIsValid()
    {
        try
        {
            return getInputStream() != null;
        }
        catch ( IOException e )
        {
            if ( LOGGER.isLoggable( Level.SEVERE ) )
            {
                LOGGER.log( Level.SEVERE, "Error while getting the input stream of the image", e );
            }
            return false;
        }
    }

    @Override
    protected IImageInfo loadImageInfo()
        throws IOException
    {
        SimpleImageInfo imageInfo = new SimpleImageInfo();
        imageInfo.setInput(getInputStream());
        if (!imageInfo.check())
        {
            throw new IOException("Unable to read image info.");
        }
        return imageInfo;
    }
}