package net.sourceforge.squirrel_sql.client;
/*
* Copyright (C) 2006 Gerd Wagner
* colbell@users.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import net.sourceforge.squirrel_sql.client.util.ApplicationFiles;
import net.sourceforge.squirrel_sql.client.gui.db.SQLAlias;
/**
* When new SQuirreL versions need transform config files
* these should be done here.
*/
public class FileTransformer
{
/**
*
* @return Error message. Will cause SQuirreL to QUIT!!!
*/
public static String transform(ApplicationFiles appFiles)
{
return convertAliases_2_2_to_2_3(appFiles);
}
private static String convertAliases_2_2_to_2_3(ApplicationFiles appFiles)
{
if(appFiles.getDatabaseAliasesFile().exists())
{
return null;
}
if(false == appFiles.getDatabaseAliasesFile_before_version_2_3().exists())
{
return null;
}
try
{
FileReader fr = new FileReader(appFiles.getDatabaseAliasesFile_before_version_2_3());
BufferedReader br = new BufferedReader(fr);
FileWriter fw = new FileWriter(appFiles.getDatabaseAliasesFile());
BufferedWriter bw = new BufferedWriter(fw);
String oldClassName = "net.sourceforge.squirrel_sql.fw.sql.SQLAlias";
String newClassName = SQLAlias.class.getName();
String line = br.readLine();
while(null != line)
{
int ix = line.indexOf(oldClassName);
if(-1 != ix)
{
line = line.substring(0,ix) + newClassName + line.substring(ix + oldClassName.length(), line.length());
}
bw.write(line + "\n");
line = br.readLine();
}
bw.flush();
fw.flush();
bw.close();
fw.close();
br.close();
fr.close();
return null;
}
catch (Exception e)
{
return "Conversion of Aliases file failed: Could not write new Aliases file named \n" +
appFiles.getDatabaseAliasesFile().getPath() + "\n" +
"You can not start this new version of SQuirreL using your existing Aliases.\n" +
"You may either continue to use your former SQuirreL version or remove file\n" +
appFiles.getDatabaseAliasesFile_before_version_2_3().getPath() + "\n" +
"for your first start of this SQuirreL version. SQuirreL will then try to create an empty Alias file named\n" +
appFiles.getDatabaseAliasesFile().getPath() + "\n" +
"Please contact us about this problem. Send a mail to squirrel-sql-users@lists.sourceforge.net.";
}
}
}