Here you can find the source of copyNode(final Document newDoc, final Node node)
public static final Node copyNode(final Document newDoc, final Node node)
//package com.java2s; /*/*from w w w. j ava2 s . c om*/ * eXist Open Source Native XML Database * Copyright (C) 2001-2014 The eXist Project * http://exist-db.org * * This program 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 2 * of the License, or (at your option) any later version. * * This program 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 this program; if not, write to the Free Software Foundation * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * $Id$ */ import org.w3c.dom.*; public class Main { public static final Node copyNode(final Document newDoc, final Node node) { final Node newNode; switch (node.getNodeType()) { case Node.ELEMENT_NODE: newNode = newDoc.createElementNS(node.getNamespaceURI(), node.getNodeName()); final NamedNodeMap attributes = node.getAttributes(); for (int i = 0; i < attributes.getLength(); i++) { final Attr attr = (Attr) attributes.item(i); final Attr newAttr = newDoc.createAttributeNS(attr.getNamespaceURI(), attr.getNodeName()); newAttr.setValue(((Attr) node).getValue()); ((Element) newNode).setAttributeNode(newAttr); } copyChildren(newDoc, node, newNode); break; case Node.TEXT_NODE: newNode = newDoc.createTextNode(((Text) node).getData()); break; default: // TODO : error ? -pb newNode = null; } return newNode; } public static final void copyChildren(final Document newDoc, final Node node, final Node newNode) { final NodeList children = node.getChildNodes(); Node newChild; for (int i = 0; i < children.getLength(); i++) { final Node child = children.item(i); if (child == null) { continue; } switch (child.getNodeType()) { case Node.ELEMENT_NODE: { newChild = copyNode(newDoc, child); newNode.appendChild(newChild); break; } case Node.TEXT_NODE: { newChild = copyNode(newDoc, child); newNode.appendChild(newChild); break; } // TODO : error for any other one -pb } } } }