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// Copyright Hugh Perkins 2006, 2009
// hughperkins@gmail.com http://manageddreams.com
//
// This program 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 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 General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along
// with this program in the file licence.txt; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-
// 1307 USA
// You can find the licence also on the web at:
// http://www.opensource.org/licenses/gpl-license.php
//
// ======================================================================================
//
package hughai.utils;
import org.w3c.dom.*;
import java.io.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import javax.xml.xpath.*;
import java.util.*;
public class XmlHelper
{
public static Document CreateDom()
{
Document newdoc = getDocumentBuilder().newDocument();
//newdoc..PreserveWhitespace = true;
Element childnode = newdoc.createElement( "root" );
newdoc.appendChild( childnode );
return newdoc;
}
static DocumentBuilder getDocumentBuilder(){
DocumentBuilder documentBuilder = null;
try {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
documentBuilder = documentBuilderFactory.newDocumentBuilder();
} catch( Exception e ) {
throw new RuntimeException( e );
}
return documentBuilder;
}
public static Document OpenDom( String sfilepath )
{
Document newdoc = null;
try {
newdoc = getDocumentBuilder().parse(new File(sfilepath));
} catch( Exception e ){
throw new RuntimeException(e);
}
return newdoc;
}
public static void SaveDom( Document dom, String filepath ) {
try {
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource domSource = new DOMSource(dom);
StreamResult streamResult = new StreamResult(new FileOutputStream(filepath));
transformer.setOutputProperty( OutputKeys.INDENT, "yes" );
transformer.setOutputProperty( OutputKeys.ENCODING, "utf-8" );
transformer.transform( domSource, streamResult );
} catch( Exception e ) {
throw new RuntimeException( e );
}
}
public static Element AddChild( Element parent, String nodename )
{
Element childnode = parent.getOwnerDocument().createElement( nodename );
parent.appendChild( childnode );
return childnode;
}
public static List<Element> SelectElements( Element parent, String expression ) {
List<Element> nodes = new ArrayList<Element>();
XPath xpath = getXPath();
try{
XPathExpression xpathExpression = xpath.compile(expression);
NodeList nodeList = (NodeList) xpathExpression.evaluate(parent, XPathConstants.NODESET);
for( int i = 0; i < nodeList.getLength(); i++ ) {
nodes.add( (Element)(nodeList.item(i)));
}
} catch ( Exception e ){
throw new RuntimeException( e );
}
return nodes;
}
public static Element SelectSingleElement( Element parent, String expression ) {
Element element = null;
XPath xpath = getXPath();
try{
XPathExpression xpathExpression = xpath.compile(expression);
element = (Element) xpathExpression.evaluate(parent, XPathConstants.NODE);
} catch ( Exception e ){
throw new RuntimeException( e );
}
return element;
}
public static XPath getXPath(){
return getXPathFactory().newXPath();
}
public static XPathFactory getXPathFactory(){
return XPathFactory.newInstance();
}
}
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