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/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library 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 3 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out 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 library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package org.cristalise.kernel.utils;
import java.io.StringReader;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
public class XmlElementParser {
public static String[] parse(String data, String xpath) {
Vector<String> returnData = new Vector<String>();
String[] returnArray;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder;
try {
builder = factory.newDocumentBuilder();
} catch (ParserConfigurationException e) {
Logger.error(e);
throw new RuntimeException("Could not create XML Document Builder");
}
StringReader is = new StringReader(data);
Document doc;
try {
doc = builder.parse(new InputSource(is));
} catch (Exception e) {
Logger.error(e);
throw new RuntimeException("Parser malfunction");
}
StringTokenizer pathTokens = new StringTokenizer(xpath, "/");
int taille = pathTokens.countTokens();
String[] pathElements = new String[taille];
int i = taille;
while (pathTokens.hasMoreElements())
pathElements[--i] = pathTokens.nextToken();
if (Logger.doLog(6)) {
Logger.msg(6, "Path elements:");
for (String pathElement : pathElements)
Logger.debug(6, pathElement);
}
Logger.msg(6, "Looking for attribute " + pathElements[0] + " in "
+ pathElements[1]);
NodeList nl = doc.getElementsByTagName(pathElements[1]);
for (int j = 0; j < nl.getLength(); j++) {
Logger.msg(6, "Found one");
Element e = (Element) nl.item(j);
boolean match = true;
Node child = e;
for (int k = 2; k < taille && match; k++) {
Logger.msg(6, "Checking parent " + pathElements[k]);
child = child.getParentNode();
if (!child.getNodeName().equals(pathElements[k])) {
Logger.msg(6, "No match for " + child.getNodeName());
match = false;
} else
Logger.msg(6, "Match");
}
if (match && e.hasAttribute(pathElements[0])) {
Logger.msg(
6,
"Matching Attribute " + pathElements[0] + "="
+ e.getAttribute(pathElements[0]));
returnData.add(e.getAttribute(pathElements[0]));
}
}
Logger.msg(6, "Looking for element " + pathElements[0]);
nl = doc.getElementsByTagName(pathElements[0]);
for (int j = 0; j < nl.getLength(); j++) {
Logger.msg(6, "Found one");
Element e = (Element) nl.item(j);
boolean match = true;
Node child = e;
for (int k = 1; k < taille && match; k++) {
Logger.msg(6, "Checking parent " + pathElements[k]);
child = child.getParentNode();
if (!child.getNodeName().equals(pathElements[k])) {
Logger.msg(6, "No match for " + child.getNodeName());
match = false;
} else
Logger.msg(6, "Match");
}
if (match) {
String s = e.getFirstChild().getNodeValue();
Logger.msg(6, "Found Element " + pathElements[0] + "=" + s);
if (s != null)
returnData.add(s);
}
}
Logger.msg(3, returnData.size() + " values found for " + xpath);
returnArray = new String[returnData.size()];
for (int j = 0; j < returnArray.length; j++)
returnArray[j] = returnData.get(j);
return returnArray;
}
}
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