com.uksf.mf.core.utility.ClassNames.java Source code

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Here is the source code for com.uksf.mf.core.utility.ClassNames.java

Source

/*
 * Copyright (c) Tim UKSF 2016.
 * This file is part of UKSF-MF which is released under GPLv3.
 * Go to https://github.com/tbeswick96/UKSF-MF/blob/master/LICENSE for full license details.
 */

package com.uksf.mf.core.utility;

import org.apache.commons.io.IOUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.LinkedHashMap;
import java.util.List;

import static com.uksf.mf.core.utility.LogHandler.Severity.WARNING;

/**
 * @author Tim
 */
public class ClassNames {
    /**
     * Gets class names from file on uksf server
     * @return map of class names: old, new
     */
    public static LinkedHashMap<String, String> getClassNames() {
        LinkedHashMap<String, String> classNames = new LinkedHashMap<>();
        try {
            URL url = new URL("http://www.uk-sf.com/mf/CLASSES.txt");
            if (checkConnection(url)) {
                throw new IOException();
            }
            InputStream stream = url.openStream();
            List<String> lines = IOUtils.readLines(stream, "UTF-8");
            for (String line : lines) {
                String parts[] = line.split(",", -1);
                if (parts[1] == null)
                    parts[1] = "";
                classNames.put(parts[0], parts[1]);
            }
        } catch (IOException e) {
            LogHandler.logSeverity(WARNING, "Cannot reach 'www.uk-sf.com', class name swap will not run");
            return null;
        }
        return classNames;
    }

    /**
     * Checks if connection to URL can be established
     * @param url url to check
     * @return connection state
     * @throws IOException error
     */
    private static boolean checkConnection(URL url) throws IOException {
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
        connection.setConnectTimeout(1500);
        connection.setReadTimeout(1500);
        connection.setRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
        connection.connect();
        return connection.getResponseCode() == 404;
    }
}