Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.IOException;
import java.io.Reader;
import java.util.HashMap;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

public class Main {
    public static Map<String, String> load(Reader reader) throws IOException {
        try {
            // Load XML into JDOM Document
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db;

            db = dbf.newDocumentBuilder();

            Document doc = db.parse(new InputSource(reader));
            doc.getDocumentElement().normalize();

            Map<String, String> result = new HashMap<String, String>();
            loadFromElements(result, doc.getDocumentElement().getChildNodes(),
                    new StringBuffer(doc.getDocumentElement().getNodeName()));
            return result;
        } catch (ParserConfigurationException e) {
            throw new IOException(e);
        } catch (SAXException e) {
            throw new IOException(e);
        }
    }

    /**
     * <p>This helper method loads the XML properties from a specific
     *   XML element, or set of elements.</p>
     *
     * @param nodeList <code>List</code> of elements to load from.
     * @param baseName the base name of this property.
     */
    private static void loadFromElements(Map<String, String> result, NodeList nodeList, StringBuffer baseName) {
        // Iterate through each element
        for (int s = 0; s < nodeList.getLength(); s++) {
            Node current = nodeList.item(s);
            if (current.getNodeType() == Node.ELEMENT_NODE) {
                String name = current.getNodeName();
                String text = null;
                NodeList childNodes = current.getChildNodes();

                if (childNodes.getLength() > 0) {
                    text = current.getChildNodes().item(0).getNodeValue();
                }

                // String text = current.getAttributeValue("value");            

                // Don't add "." if no baseName
                if (baseName.length() > 0) {
                    baseName.append(".");
                }
                baseName.append(name);

                // See if we have an element value
                if ((text == null) || (text.equals(""))) {
                    // If no text, recurse on children
                    loadFromElements(result, current.getChildNodes(), baseName);
                } else {
                    // If text, this is a property
                    result.put(baseName.toString(), text);
                }

                // On unwind from recursion, remove last name
                if (baseName.length() == name.length()) {
                    baseName.setLength(0);
                } else {
                    baseName.setLength(baseName.length() - (name.length() + 1));
                }
            }
        }
    }
}