org.tn5250j.encoding.JavaCodePageFactory Maven / Gradle / Ivy
/**
* Title: JavaCodePage
* Copyright: Copyright (c) 2001, 2002, 2003
* Company:
* @author LDC, WVL, Luc, master_jaf
* @version 0.4
*
* Description:
*
* 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, 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 software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
*/
package org.tn5250j.encoding;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
/* package */ class JavaCodePageFactory extends AbstractCodePage {
private final CharsetEncoder encoder;
private final CharsetDecoder decoder;
/* package */ JavaCodePageFactory(String encoding, CharsetEncoder encoder, CharsetDecoder decoder) {
super(encoding);
this.encoder = encoder;
this.decoder = decoder;
}
/* (non-Javadoc)
* @see org.tn5250j.encoding.CodePage#ebcdic2uni(int)
*/
@Override
public char ebcdic2uni(int codepoint) {
try {
final ByteBuffer in = ByteBuffer.wrap(new byte[] { (byte) codepoint });
final CharBuffer out = this.decoder.decode(in);
return out.get(0);
} catch (Exception cce) {
return ' ';
}
}
/* (non-Javadoc)
* @see org.tn5250j.encoding.CodePage#uni2ebcdic(char)
*/
@Override
public byte uni2ebcdic(char character) {
try {
final CharBuffer in = CharBuffer.wrap(new char[] {character});
final ByteBuffer out = this.encoder.encode(in);
return out.get(0);
} catch (Exception cce) {
return 0x0;
}
}
/**
* @param encoding
* @return A new {@link CodePage} object OR null, if not available.
*/
/* package */ static ICodePage getCodePage(final String encoding) {
CharsetDecoder dec = null;
CharsetEncoder enc = null;
try {
final Charset cs = java.nio.charset.Charset.forName(encoding);
dec = cs.newDecoder();
enc = cs.newEncoder();
} catch (Exception e) {
enc = null;
dec = null;
}
if ((enc != null) && (dec != null)) {
return new JavaCodePageFactory(encoding, enc, dec);
}
return null;
}
}