/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.lib.i18n;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
import java.nio.charset.IllegalCharsetNameException;
import java.nio.charset.UnsupportedCharsetException;
import java.util.logging.Logger;
import com.caucho.quercus.QuercusException;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.StringValue;
import com.caucho.util.L10N;
import com.caucho.vfs.TempBuffer;
public class GenericEncoder
extends Encoder
{
private static final Logger log
= Logger.getLogger(GenericEncoder.class.getName());
private static final L10N L = new L10N(GenericEncoder.class);
private Charset _charset;
protected CharsetEncoder _encoder;
public GenericEncoder(String charsetName)
{
super(charsetName);
_charset = Charset.forName(charsetName);
_encoder = _charset.newEncoder();
}
public boolean isEncodable(Env env, StringValue str)
{
int len = str.length();
for (int i = 0; i < len; i++) {
if (! _encoder.canEncode(str.charAt(i))) {
return false;
}
}
return false;
}
@Override
public StringValue encode(Env env, CharSequence str)
{
CharBuffer in = CharBuffer.wrap(str);
TempBuffer tempBuf = TempBuffer.allocate();
try {
ByteBuffer out = ByteBuffer.wrap(tempBuf.getBuffer());
StringValue sb = env.createBinaryBuilder();
while (in.hasRemaining()) {
CoderResult coder = _encoder.encode(in, out, false);
if (! fill(sb, in, out, coder))
return sb;
out.clear();
}
CoderResult coder = _encoder.encode(in, out, true);
if (! fill(sb, in, out, coder))
return sb;
out.clear();
coder = _encoder.flush(out);
fill(sb, in, out, coder);
return sb;
} finally {
TempBuffer.free(tempBuf);
}
}
protected boolean fill(StringValue sb, CharBuffer in,
ByteBuffer out, CoderResult coder)
{
int len = out.position();
if (len > 0) {
int offset = out.arrayOffset();
sb.appendBytes(out.array(), offset, offset + len);
}
if (coder.isMalformed() || coder.isUnmappable()) {
int errorIndex = in.position();
in.position(errorIndex + 1);
if (_isIgnore) {
}
else if (_replacement != null)
sb.append(_replacement);
else if (_isReplaceUnicode)
sb.append("U+" + Integer.toHexString(in.get(errorIndex)));
else
return false;
}
return true;
}
public void reset()
{
_encoder.reset();
}
}