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    /** An instance of this Interpreter. Only one needed for the whole system */
032    public static final AsciiInterpreter INSTANCE = new AsciiInterpreter();
033
034    /**
035         * (non-Javadoc)
036         *
037     */
038    @Override
039    public void interpret(String data, byte[] b, int offset)
040    {
041        System.arraycopy(data.getBytes(ISOUtil.CHARSET), 0, b, offset, data.length());
042    }
043
044    /**
045         * (non-Javadoc)
046         *
047     */
048    @Override
049    public String uninterpret (byte[] rawData, int offset, int length) {
050        byte[] ret = new byte[length];
051        try {
052            System.arraycopy(rawData, offset, ret, 0, length);
053            return new String(ret, ISOUtil.CHARSET);
054        } catch (IndexOutOfBoundsException e) {
055            throw new RuntimeException(
056                String.format("Required %d but just got %d bytes", length, rawData.length-offset)
057            );
058        }
059    }
060
061    /**
062         * (non-Javadoc)
063         *
064     */
065    @Override
066    public int getPackedLength(int nDataUnits)
067    {
068        return nDataUnits;
069    }
070}