/*
* Copyright 1999-2008 University of Chicago
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package org.nimbustools.auto_common.confmgr;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;
public class SecDescConfigReplace {
public void replace(String secDescPath,
String paramName,
String paramValue) throws Exception {
if (secDescPath == null) {
throw new IllegalArgumentException("secDescPath may not be null");
}
if (paramName == null) {
throw new IllegalArgumentException("paramName may not be null");
}
if (paramValue == null) {
throw new IllegalArgumentException("paramValue may not be null");
}
final DocumentBuilderFactory docBuilderFactory =
DocumentBuilderFactory.newInstance();
final DocumentBuilder docBuilder =
docBuilderFactory.newDocumentBuilder();
final Document doc = docBuilder.parse(new File(secDescPath));
doc.normalizeDocument();
final Node node = this.getNodeByNameOnly(paramName, doc);
if (node == null) {
throw new Exception("Can not find '" + paramName + "' element");
}
this.replaceValue(node, paramValue, paramName);
new DomWriter().writeDOM(doc, secDescPath);
}
protected void replaceValue(Node node, String newvalue, String paramName)
throws Exception {
final NamedNodeMap attrs = node.getAttributes();
final Node valNode = attrs.getNamedItem("value");
if (valNode == null) {
throw new Exception("Found '" + paramName +
"' element, but no value attribute (?)");
}
valNode.setNodeValue(newvalue);
}
protected Node getNodeByNameOnly(String name,
Node topnode) {
if (name == null) {
throw new IllegalArgumentException("name may not be null");
}
if (topnode == null) {
return null;
}
final String thisname = topnode.getNodeName();
if (thisname != null && thisname.equals(name)) {
return topnode;
}
final NodeList nodes = topnode.getChildNodes();
if (nodes == null || nodes.getLength() < 1) {
return null;
}
for (int i = 0; i < nodes.getLength(); i++) {
final Node node = this.getNodeByNameOnly(name, nodes.item(i));
if (node != null) {
return node;
}
}
return null;
}
}