/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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/. */
package com.db4o.internal.encoding;
import com.db4o.config.encoding.*;
/**
* @exclude
*/
public abstract class BuiltInStringEncoding implements StringEncoding {
/**
* keep the position in the array.
* Information is used to look up encodings.
*/
private static final BuiltInStringEncoding[] ALL_ENCODINGS = new BuiltInStringEncoding[] {
null,
new LatinStringEncoding(),
new UnicodeStringEncoding(),
new UTF8StringEncoding(),
};
public static byte encodingByteForEncoding(StringEncoding encoding){
for (int i = 1; i < ALL_ENCODINGS.length; i++) {
if(encoding.getClass() == ALL_ENCODINGS[i].getClass()){
return (byte) i;
}
}
return 0;
}
public static LatinStringIO stringIoForEncoding(byte encodingByte, StringEncoding encoding){
if(encodingByte < 0 || encodingByte > ALL_ENCODINGS.length){
throw new IllegalArgumentException();
}
if(encodingByte == 0){
if(encoding instanceof BuiltInStringEncoding){
System.out.println("Warning! Database was created with a custom string encoding but no custom string encoding is configured for this session.");
}
return new DelegatingStringIO(encoding);
};
BuiltInStringEncoding builtInEncoding = ALL_ENCODINGS[encodingByte];
return builtInEncoding.createStringIo(encoding);
}
protected LatinStringIO createStringIo(StringEncoding encoding) {
return new DelegatingStringIO(encoding);
}
}