/* * Copyright (c) 2000 jPOS.org.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in *    the documentation and/or other materials provided with the *    distribution. * * 3. The end-user documentation included with the redistribution, *    if any, must include the following acknowledgment: *    "This product includes software developed by the jPOS project  *    (http://www.jpos.org/)". Alternately, this acknowledgment may  *    appear in the software itself, if and wherever such third-party  *    acknowledgments normally appear. * * 4. The names "jPOS" and "jPOS.org" must not be used to endorse  *    or promote products derived from this software without prior  *    written permission. For written permission, please contact  *    license@jpos.org. * * 5. Products derived from this software may not be called "jPOS", *    nor may "jPOS" appear in their name, without prior written *    permission of the jPOS project. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.   * IN NO EVENT SHALL THE JPOS PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE  * POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the jPOS Project.  For more * information please see <http://www.jpos.org/>. */package org.jpos.iso;/** * Implements BCD Interpreter. Numeric Strings (consisting of chars '0'..'9' are converted * to and from BCD bytes. Thus, "1234" is converted into 2 bytes: 0x12, 0x34. *  * @author joconnor * @version $Revision: 1.4 $ $Date: 2004/04/23 17:53:42 $ */public class BCDInterpreter implements Interpreter{    /** This BCDInterpreter sometimes adds a 0-nibble to the left. */    public static final BCDInterpreter LEFT_PADDED = new BCDInterpreter(true, false);    /** This BCDInterpreter sometimes adds a 0-nibble to the right. */    public static final BCDInterpreter RIGHT_PADDED = new BCDInterpreter(false, false);    /** This BCDInterpreter sometimes adds a F-nibble to the right. */    public static final BCDInterpreter RIGHT_PADDED_F = new BCDInterpreter(false, true);    /** This BCDInterpreter sometimes adds a F-nibble to the left. */    public static final BCDInterpreter LEFT_PADDED_F = new BCDInterpreter(true, true);    private boolean leftPadded;    private boolean fPadded;    /** Kept private. Only two instances are possible. */    private BCDInterpreter(boolean leftPadded, boolean fPadded) {        this.leftPadded = leftPadded;        this.fPadded = fPadded;    }    /**	 * (non-Javadoc)	 * 	 * @see org.jpos.iso.Interpreter#interpret(java.lang.String)	 */    public void interpret(String data, byte[] b, int offset)    {        ISOUtil.str2bcd(data, leftPadded, b, offset);        if (fPadded && !leftPadded) {            b[b.length-1] |= (byte)(b[b.length-1] << 4) == 0 ? 0x0F : 0x00;        }    }    /**	 * (non-Javadoc)	 * 	 * @see org.jpos.iso.Interpreter#uninterpret(byte[])	 */    public String uninterpret(byte[] rawData, int offset, int length)    {        return ISOUtil.bcd2str (rawData, offset, length, leftPadded);    }    /**	 * Each numeric digit is packed into a nibble, so 2 digits per byte, plus the     * possibility of padding.	 * 	 * @see org.jpos.iso.Interpreter#getPackedLength(int)	 */    public int getPackedLength(int nDataUnits)    {        return (nDataUnits + 1) / 2;    }}