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/**
* Copyright (C) 2011-2012 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 org.odftoolkit.odfdom.converter.core;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.odftoolkit.odfdom.converter.core.utils.StringUtils;
import org.odftoolkit.odfdom.doc.OdfDocument;
import org.odftoolkit.odfdom.dom.DefaultElementVisitor;
import org.odftoolkit.odfdom.dom.element.draw.DrawImageElement;
import org.odftoolkit.odfdom.pkg.OdfElement;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
public abstract class ElementVisitorConverter
extends DefaultElementVisitor
{
private static final Logger LOGGER = Logger.getLogger( ElementVisitorConverter.class.getName() );
protected final OdfDocument odfDocument;
protected final OutputStream out;
protected final Writer writer;
private final IImageExtractor extractor;
public ElementVisitorConverter( final OdfDocument odfDocument, final OutputStream out, Writer writer )
{
this( odfDocument, null, out, writer );
}
public ElementVisitorConverter( final OdfDocument odfDocument, final IImageExtractor extractor,
final OutputStream out, Writer writer )
{
this.odfDocument = odfDocument;
this.out = out;
this.writer = writer;
this.extractor = extractor;
}
@Override
public void visit( OdfElement ele )
{
Node node = ele.getFirstChild();
int nodeType = -1;
while ( node != null )
{
nodeType = node.getNodeType();
switch ( nodeType )
{
case Node.ELEMENT_NODE:
OdfElement element = (OdfElement) node;
element.accept( this );
break;
case Node.TEXT_NODE:
processTextNode( (Text) node );
}
node = node.getNextSibling();
}
}
protected abstract void processTextNode( Text node );
@Override
public final void visit( DrawImageElement ele )
{
String href = ele.getXlinkHrefAttribute();
if ( StringUtils.isNotEmpty( href ) )
{
IImageExtractor extractor = getExtractor();
boolean needImageStream = isNeedImageStream() || extractor != null;
byte[] imageStream = needImageStream ? odfDocument.getPackage().getBytes( href ) : null;
if ( extractor != null && imageStream != null )
{
try
{
extractor.extract( href, imageStream );
}
catch ( Throwable e )
{
LOGGER.log( Level.SEVERE, "Error while extracting the image " + href, e );
}
}
visitImage( ele, href, imageStream );
}
}
protected void visitImage( DrawImageElement ele, String href, byte[] imageStream )
{
// do nothing
}
protected boolean isNeedImageStream()
{
return false;
}
public IImageExtractor getExtractor()
{
return extractor;
}
public void save()
throws IOException
{
if ( out != null )
{
out.close();
}
if ( writer != null )
{
writer.close();
}
}
}