base1_bitmap126.java

来自「java pos,你可以直接编译运行,」· Java 代码 · 共 118 行

/*
 * 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 
 *    [e-mail].
 *
 * 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.packager;

import java.util.BitSet;

import org.jpos.iso.ISOBitMapPackager;
import org.jpos.iso.ISOComponent;
import org.jpos.iso.ISOException;
import org.jpos.iso.ISOUtil;

/**
 * ISOFieldPackager Binary Bitmap
 *
 * @author <a href="mailto:[e-mail]">Eoin Flood</a>
 * @version $Id: Base1_BITMAP126.java,v 1.5 2003/10/13 10:34:15 apr Exp $
 * @see ISOComponent
 * @see ISOBitMapPackager
 */
public class Base1_BITMAP126 extends ISOBitMapPackager 
{
    public Base1_BITMAP126()
    {
        super();
    }
    /**
    * @param len - field len
    * @param description symbolic descrption
    */
    public Base1_BITMAP126(int len, String description) 
    {
        super(len, description);
    }
    /**
    * @param c - a component
    * @return packed component
    * @exception ISOException
    */
    public byte[] pack (ISOComponent c) throws ISOException 
    {
        return ISOUtil.bitSet2byte ((BitSet) c.getValue());
    }
    /**
    * @param c - the Component to unpack
    * @param b - binary image
    * @param offset - starting offset within the binary image
    * @return consumed bytes
    * @exception ISOException
    */
    public int unpack (ISOComponent c, byte[] b, int offset) throws ISOException
    {
        int len;
        // 
        // For a this type of Bitmap bit0 does not mean
        // that there is a secondary bitmap to follow
        // It simply means that field 1 is present
        // The standard IFB_BITMAP class assumes that
        // bit0 always means extended bitmap 
        //
        BitSet bmap = ISOUtil.byte2BitSet (b, offset, false); // False => no extended bitmap

        c.setValue(bmap);
        len = ((len=bmap.size()) > 128) ? 128 : len;
        return (len >> 3);
    }
    public int getMaxPackedLength() 
    {
        return getLength() >> 3;
    }
}