Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.util.List;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.bootstrap.DOMImplementationRegistry;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSSerializer;

public class Main {
    /**
     * Update a property of a given configuration file and return a string representation of the
     * xml document
     * @param doc
     * @param property
     * @param newValue
     * @throws IllegalAccessException 
     * @throws InstantiationException 
     * @throws ClassNotFoundException 
     */
    public static String updateXmlDoc(Document doc, List<String> properties)
            throws ClassNotFoundException, InstantiationException, IllegalAccessException {
        for (String property : properties) {
            String key = property.split(":")[0];
            String value = property.split(":")[1];
            NodeList propertiesNode = doc.getElementsByTagName("esf:property");
            for (int i = 0; i < propertiesNode.getLength(); i++) {
                Node node = propertiesNode.item(i);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element el = (Element) node;
                    if (key.equals(el.getAttribute("name"))) {
                        el.getElementsByTagName("esf:value").item(0).setTextContent(value);
                    }
                }
            }
        }
        return parseXmlDocToString(doc);
    }

    private static String parseXmlDocToString(Document xmlDoc)
            throws ClassNotFoundException, InstantiationException, IllegalAccessException {
        // Add formatting to the xml document in case we want to save to a file
        System.setProperty(DOMImplementationRegistry.PROPERTY,
                "com.sun.org.apache.xerces.internal.dom.DOMImplementationSourceImpl");
        final DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();
        final DOMImplementationLS impl = (DOMImplementationLS) registry.getDOMImplementation("LS");
        final LSSerializer writer = impl.createLSSerializer();
        writer.getDomConfig().setParameter("format-pretty-print", Boolean.TRUE); // Set this to true if the output needs to be beautified.
        writer.getDomConfig().setParameter("xml-declaration", true); // Set this to true if the declaration is needed to be outputted

        return writer.writeToString(xmlDoc);
    }
}