/* * module: pip/java/packing -- Strategy objects for converting * Java objects to and from stored data. * * Copyright (C) 1997 Pharos IP Pty Ltd * $Id: StringPacking.java,v 1.3 1997-10-23 21:09:59+10 mbp Exp $ * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ package au.com.pharos.packing; /** StringPacking converts Java Strings to and from byte arrays * using the default UTF-8 encoding. * *
For strings containing only ASCII-7 characters, this is
* equivalent to NativeStringPacking
but probably
* somewhat slower. However, it will safely handle non-ASCII
* characters, or unusual locales.
*
* @see au.com.pharos.packing.Packing
* @see au.com.pharos.packing.NativeStringPacking
**/
public class StringPacking extends Packing
implements java.io.Serializable
{
/** Convert a String to an array of bytes using Java's default
* encoding.
*
*
If obj is not a String, array of bytes, or null
* then it's toString()
method is called first to
* convert it to an array of bytes. This will lose information in
* many cases.
*
* @param obj The object to convert.
*
* @return obj converted to an array of bytes; or null if
* obj is null.
**/
public byte[] toBytes(Object obj)
{
if (obj == null)
return null;
else if (obj instanceof byte[])
return (byte[]) obj;
else if (obj instanceof String)
return ((String) obj).getBytes();
else
return obj.toString().getBytes();
}
/** Decode an array of bytes using the default String encoding.
*
* @param raw An array of bytes to decode.
*
* @return A String representation of raw; or null if
* raw is null.
**/
public Object fromBytes(byte[] raw)
{
if (raw == null)
return null;
else
return new String(raw);
}
}