/*
* Copyright (C) 2006 http://www.chaidb.org
*
* 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 2
* 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.
*
*/
package org.chaidb.db.helper;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.ConfigurationKey;
import org.apache.commons.configuration.XMLConfiguration;
import org.chaidb.db.exception.ChaiDBException;
import org.chaidb.db.exception.ErrorCode;
import java.io.*;
import java.util.List;
/**
* @author Kurt Sung
*/
public class AbstractXmlConfig {
private XMLConfiguration config;
protected String name;
public static final String ROOT_ELEMENT = "ChaiDB";
protected static final char PROPERTY_DELIMITER = ConfigurationKey.PROPERTY_DELIMITER;
protected static final String ESCAPED_DELIMITER = ConfigurationKey.ESCAPED_DELIMITER;
public AbstractXmlConfig(String filename) throws ChaiDBException {
this.name = filename;
if (!(new File(filename).exists())) {
createNewFile(filename, ROOT_ELEMENT);
}
try {
config = new XMLConfiguration(filename);
} catch (ConfigurationException e) {
createNewFile(filename, ROOT_ELEMENT);
try {
config = new XMLConfiguration(filename);
} catch (ConfigurationException e1) {
throw new ChaiDBException(ErrorCode.CONFIG_FILE_READ_ERROR, e);
}
}
config.setEncoding("UTF-8");
}
protected void createNewFile(String filename, String rootElement) throws ChaiDBException {
try {
DataOutputStream os = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(filename)));
os.writeBytes(AbstractControlFile.XML_HEADER + "\n");
os.writeBytes("<" + rootElement + "/>");
os.close();
} catch (IOException e) {
throw new ChaiDBException(ErrorCode.CONFIG_FILE_CREATE_ERROR, e);
}
}
public synchronized void setProperty(String name, String value) throws ChaiDBException {
config.reload();
config.setProperty(name, value);
save();
}
protected synchronized void save() throws ChaiDBException {
try {
config.save();
} catch (ConfigurationException e) {
throw new ChaiDBException(ErrorCode.CONFIG_FILE_WRITE_ERROR, e);
}
}
protected synchronized void resetProperty(String name, String value) throws ChaiDBException {
config.reload();
config.clearProperty(name);
config.addProperty(name, value);
save();
}
protected String getProperty(String name) {
return (String) config.getProperty(name);
}
protected void addProperty(String name, Object value) {
config.addProperty(name, value);
}
protected List getList(String path) {
return config.getList(path);
}
protected int getMaxIndex(String path) {
return config.getMaxIndex(path);
}
protected void clearTree(String path) {
config.clearTree(path);
}
protected synchronized void reload() {
config.reload();
}
}