/****************************************************************************
* Copyright (C) 2012 ecsec GmbH.
* All rights reserved.
* Contact: ecsec GmbH (info@ecsec.de)
*
* This file is part of the Open eCard App.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License version 3.0 as published by the Free Software Foundation
* and appearing in the file LICENSE.GPL included in the packaging of
* this file. Please review the following information to ensure the
* GNU General Public License version 3.0 requirements will be met:
* http://www.gnu.org/copyleft/gpl.html.
*
* Other Usage
* Alternatively, this file may be used in accordance with the terms
* and conditions contained in a signed written agreement between
* you and ecsec GmbH.
*
***************************************************************************/
package org.openecard.common;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.openecard.common.util.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Openecard properties class.
* These properties are loaded from the following places. The first occurrence of a key value pair overrides the next.
* <ol>
* <li>System Properties</li>
* <li>$HOME/.openecard/openecard.properties</li>
* <li>$classpath/openecard_config/openecard.properties</li>
* </ol>
*
* @author Tobias Wich <tobias.wich@ecsec.de>
*/
public class OpenecardProperties {
private static final Logger _logger = LoggerFactory.getLogger(OpenecardProperties.class);
private static Internal properties;
private static class Internal extends OverridingProperties {
public Internal(InputStream bundledProps, InputStream homeProps) throws IOException {
super(bundledProps, homeProps);
}
}
static {
load();
}
/**
* Load properties from application bundle and disc.
*/
public static synchronized void load() {
InputStream homeProps = null;
InputStream bundledProps = null;
try {
File homePath = FileUtils.getHomeConfigDir();
File cfgFile = new File(homePath, "openecard.properties");
homeProps = new FileInputStream(cfgFile);
} catch (IOException ex) {
_logger.info("Failed to load bundled properties.", ex);
}
try {
String fileName = "openecard_config/openecard.properties";
bundledProps = FileUtils.resolveResourceAsStream(OpenecardProperties.class, fileName);
} catch (IOException ex) {
_logger.info("Failed to load properties from config dir.", ex);
}
try {
properties = new Internal(bundledProps, homeProps);
} catch (IOException ex) {
// in that case a null pointer occurs when properties is accessed
_logger.error(ex.getMessage(), ex);
}
}
/**
* @see OverridingProperties#getProperty(java.lang.String)
*/
public static String getProperty(String key) {
return properties.getProperty(key);
}
/**
* @see OverridingProperties#properties()
*/
public static Properties properties() {
return properties.properties();
}
}