001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.iso;
020
021
022/**
023 * Implements ASCII Interpreter. Strings are converted to and from ASCII bytes.
024 * This uses the US-ASCII encoding which all JVMs must support.
025 * 
026 * @author joconnor
027 * @version $Revision$ $Date$
028 */
029public class AsciiInterpreter implements Interpreter
030{
031    /** Public constructor; prefer {@link #INSTANCE} for repeated use. */
032    public AsciiInterpreter() {}
033    /** An instance of this Interpreter. Only one needed for the whole system */
034    public static final AsciiInterpreter INSTANCE = new AsciiInterpreter();
035
036    /**
037         * (non-Javadoc)
038         *
039     */
040    @Override
041    public void interpret(String data, byte[] b, int offset)
042    {
043        System.arraycopy(data.getBytes(ISOUtil.CHARSET), 0, b, offset, data.length());
044    }
045
046    /**
047         * (non-Javadoc)
048         *
049     */
050    @Override
051    public String uninterpret (byte[] rawData, int offset, int length) {
052        byte[] ret = new byte[length];
053        try {
054            System.arraycopy(rawData, offset, ret, 0, length);
055            return new String(ret, ISOUtil.CHARSET);
056        } catch (IndexOutOfBoundsException e) {
057            throw new RuntimeException(
058                String.format("Required %d but just got %d bytes", length, rawData.length-offset)
059            );
060        }
061    }
062
063    /**
064         * (non-Javadoc)
065         *
066     */
067    @Override
068    public int getPackedLength(int nDataUnits)
069    {
070        return nDataUnits;
071    }
072}