Wink Resource Parser

WinkResourceParser.java

package com.abiquo;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashSet;
import java.util.Set;

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.SAXException;

public class WinkResourceParser
{
    private static final String INTERCEPT_TEMPLATE =
        "<security:intercept-url pattern=\"%s\" method=\"%s\" access=\"\" />";

    public static void main(final String[] args) throws Exception
    {
        String uri = "http://10.60.21.206/api/console?doc=resources";
        String credentials = "YWRtaW46eGFiaXF1bw=="; // Base64(user:pass)

        WinkResourceParser parser = new WinkResourceParser(uri, credentials);
        URLConnection conn = parser.connect();
        parser.parse(conn.getInputStream());
    }

    private String uri;

    private String credentials;

    public WinkResourceParser(final String uri, final String credentials)
    {
        super();
        this.uri = uri;
        this.credentials = credentials;
    }

    public URLConnection connect() throws IOException
    {
        URL url = new URL(uri);
        URLConnection conn = url.openConnection();
        conn.setRequestProperty("Authorization", "Basic " + credentials);
        return conn;
    }

    public void parse(final InputStream in) throws ParserConfigurationException, SAXException,
        IOException
    {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(in);

        NodeList resources = doc.getElementsByTagName("resource");
        for (int i = 0; i < resources.getLength(); i++)
        {
            Node node = resources.item(i);

            Set<String> resourceMethods = new HashSet<String>();
            String resourceUri = getUriAndMethods(node, resourceMethods);

            printResource(resourceUri, resourceMethods);
        }
    }

    private String getUriAndMethods(final Node node, final Set<String> methods)
    {
        String resourceUri = null;

        NodeList children = node.getChildNodes();
        for (int j = 0; j < children.getLength(); j++)
        {
            Node child = children.item(j);

            if (child.getNodeName().equals("uri"))
            {
                resourceUri = child.getTextContent().trim();
            }
            else if (child.getNodeName().equals("methods"))
            {
                addMethods(child, methods);
            }
        }

        return resourceUri;
    }

    private void addMethods(final Node node, final Set<String> methods)
    {
        NodeList children = node.getChildNodes();
        for (int i = 0; i < children.getLength(); i++)
        {
            Node method = children.item(i);

            NodeList methodElems = method.getChildNodes();
            for (int j = 0; j < methodElems.getLength(); j++)
            {
                Node elem = methodElems.item(j);
                if (elem.getNodeName().equals("name"))
                {
                    methods.add(elem.getTextContent().trim());
                }
            }
        }
    }

    private void printResource(final String uri, final Set<String> methods)
    {
        for (String method : methods)
        {
            System.out.println(String.format(INTERCEPT_TEMPLATE, uri, method));
        }
    }

}