volker.streaming.music.PropertiesUtil.java Source code

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Here is the source code for volker.streaming.music.PropertiesUtil.java

Source

package volker.streaming.music;

/*
 * #%L
 * NowPlaying
 * %%
 * Copyright (C) 2013 Volker Lanting
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.apache.commons.logging.Log;

public class PropertiesUtil {

    public static Properties readFile(Log log, File file) {
        InputStream stream = null;
        Properties properties = new Properties();
        log.info("Reading from config file");
        try {
            if (file == null) {
                log.warn("No config file given");
            } else {
                stream = new FileInputStream(file);
                properties.load(stream);
            }
        } catch (FileNotFoundException e) {
            log.error("Config file not found", e);
        } catch (SecurityException e) {
            log.error("No read access for config file", e);
        } catch (IllegalArgumentException e) {
            log.error("Improper config format", e);
        } catch (IOException e) {
            log.error("IO failure while reading config file", e);
        } finally {
            if (stream != null) {
                try {
                    stream.close();
                } catch (IOException e) {
                    log.warn("Failed to close stream to config file");
                }
            }
        }
        return properties;
    }

    public static void toFile(Log log, Properties properties, String comment, File file, boolean append) {
        if (file == null) {
            log.error("Can't write config to null file.");
        } else {
            FileWriter writer = null;
            try {
                writer = new FileWriter(file, append);
                if (comment != null) {
                    properties.store(writer, comment);
                }
            } catch (IOException e1) {
                log.error("Can't write to config file " + file.getAbsolutePath(), e1);
            }
            try {
                if (writer != null)
                    writer.close();
            } catch (IOException e) {
                log.warn("Failed to close config writer", e);
            }
        }
    }
}