/****************************************************************************
* Copyright (C) 2012 ecsec GmbH.
* All rights reserved.
* Contact: ecsec GmbH (info@ecsec.de)
*
* This file is part of the Open eCard App.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License version 3.0 as published by the Free Software Foundation
* and appearing in the file LICENSE.GPL included in the packaging of
* this file. Please review the following information to ensure the
* GNU General Public License version 3.0 requirements will be met:
* http://www.gnu.org/copyleft/gpl.html.
*
* Other Usage
* Alternatively, this file may be used in accordance with the terms
* and conditions contained in a signed written agreement between
* you and ecsec GmbH.
*
***************************************************************************/
package org.openecard.ws.marshal;
import java.util.LinkedList;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
*
* @author Tobias Wich <tobias.wich@ecsec.de>
*/
public abstract class WhitespaceFilter {
public static void filter(Node root) {
NodeList childNodes = root.getChildNodes();
// remove afterwards else the nodelist indices may not be correct
LinkedList<Node> toRemove = new LinkedList<Node>();
for (int i = 0; i < childNodes.getLength(); i++) {
Node next = childNodes.item(i);
// only one textnode
if ((next.getNodeType() == Node.TEXT_NODE) && childNodes.getLength() == 1) {
next.setNodeValue(next.getNodeValue().trim());
}
// text node but there is more (an element) in this childlist -> remove this node
else if (next.getNodeType() == Node.TEXT_NODE) {
String strippedData = next.getNodeValue().trim();
if (strippedData.isEmpty()) {
toRemove.addFirst(next);
}
}
// comments filtered out before this call, node must be an element -> recurse
else {
filter(next);
}
}
// remove all this bullshit
for (Node n : toRemove) {
root.removeChild(n);
}
}
}