diff options
Diffstat (limited to 'src/main/java/org/cristalise/kernel/utils/XmlElementParser.java')
| -rw-r--r-- | src/main/java/org/cristalise/kernel/utils/XmlElementParser.java | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/main/java/org/cristalise/kernel/utils/XmlElementParser.java b/src/main/java/org/cristalise/kernel/utils/XmlElementParser.java new file mode 100644 index 0000000..a722410 --- /dev/null +++ b/src/main/java/org/cristalise/kernel/utils/XmlElementParser.java @@ -0,0 +1,125 @@ +/**
+ * 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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