tlvfield.java

来自「java pos,你可以直接编译运行,」· Java 代码 · 共 232 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;

import java.io.Externalizable;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.PrintStream;

import optfx.util.tlv.RawTLV;
import optfx.util.tlv.SubRawTLV;

import org.jpos.iso.packager.XMLPackager;

/**
 * implements <b>Leaf</b> for TLV fields
 *
 * See the
 * <a href="API_users_guide.html">API User's Guide</a>
 * for details.
 *
 * @author bharavi gade
 * @see ISOComponent
 */
public class TLVField
    extends ISOComponent
    implements Cloneable, Externalizable
{
    protected int fieldNumber;
    //protected byte[] value;
    protected RawTLV tlv;
    /**
     * No args constructor
     * <font size="-1">(required by Externalizable support on ISOMsg)</font>
     */
    public TLVField () {
        fieldNumber = -1;
    }
    /**
     * @param n - the FieldNumber
     */
    public TLVField(int n) {
        fieldNumber = n;
        tlv=new RawTLV(0x21);
    }
    /**
     * @param n - fieldNumber
     * @param v - fieldValue
     */
    public TLVField(int n, byte[] v) {
        fieldNumber = n;
        //value = v;
        tlv=new RawTLV(0,0x21,v);
        int d=4;
    }
    /**
     * @param n - fieldNumber
     * @param v - fieldValue
     * @param offset - starting offset
     * @param len    - field length
     */
    public TLVField(int n, byte[] v, int offset, int len) {
    byte[] b = new byte[len];
    System.arraycopy (v, offset, b, 0, len);
        fieldNumber = n;
        //value = b;
        tlv=new RawTLV(b);

    }
    /**
     * changes this Component field number<br>
     * Use with care, this method does not change
     * any reference held by a Composite.
     * @param fieldNumber new field number
     */
    public void setFieldNumber (int fieldNumber) {
    this.fieldNumber = fieldNumber;
    }
    /**
     * not available on Leaf - always throw ISOException
     * @exception ISOException
     */
    public byte[] pack() throws ISOException {
        throw new ISOException ("Not available on Leaf");
    }
    /**
     * not available on Leaf - always throw ISOException
     * @exception ISOException
     */
    public int unpack(byte[] b) throws ISOException {
        throw new ISOException ("Not available on Leaf");
    }
    /**
     * not available on Leaf - always throw ISOException
     * @exception ISOException
     */
    public void unpack(InputStream in) throws ISOException {
        throw new ISOException ("Not available on Leaf");
    }
    /**
     * @return Object representing this field number
     */
    public Object getKey() {
        return new Integer(fieldNumber);
    }
    /**
     * @return Object representing this field value
     */
    public Object getValue() {
        //return value;
        return tlv.getValue();
    }
    /**
     * @param obj - Object representing this field value
     * @exception ISOException
     */
    public void setValue (Object obj) throws ISOException {
        if (obj instanceof String)
            //value = ((String) obj).getBytes();
            tlv=new RawTLV(0,0x21,((String) obj).getBytes());
        else
            tlv=new RawTLV(0,0x21,(byte[]) obj);
            //value = (byte[]) obj;
    }
    /**
     * @return byte[] representing this field
     */
    public byte[] getBytes() {
    //return value;
    return tlv.getValue();
    }
    /**
     * dump this field to PrintStream. The output is sorta
     * XML, intended to be easily parsed.
     * @param p - print stream
     * @param indent - optional indent string
     */
    public void dump (PrintStream p, String indent) {
        p.println (indent +"<"+XMLPackager.ISOFIELD_TAG + " " +
        XMLPackager.ID_ATTR +"=\"" +fieldNumber +"\" "+
        XMLPackager.VALUE_ATTR +"=\"" +this.toString() + "\" " +
        XMLPackager.TYPE_ATTR +"=\"" + XMLPackager.TYPE_BINARY + "\"/>"
    );
    }
    public String toString() {
      //  return ISOUtil.hexString(value);
        return ISOUtil.hexString(tlv.getData());
    }
    public void writeExternal (ObjectOutput out) throws IOException {
        byte[] value=tlv.getValue();
        out.writeShort (fieldNumber);
        out.writeShort (value.length);
        out.write (value);
    }
    public void readExternal  (ObjectInput in)
        throws IOException, ClassNotFoundException
    {
        fieldNumber = in.readShort ();
        byte[] value = new byte[in.readShort()];
        in.readFully (value);
        tlv=new RawTLV(0,0x21,value);
    }
    //special methods for TLV
    public void addTLV(int tag,byte[] value) {
        tlv.addTLV(new RawTLV(0,tag,value));
    }
    public byte[] getFirstTLV(int tag) {
       SubRawTLV stlv=tlv.findFirstSubTLV(tag);
       if(stlv!=null)
       return stlv.getValue();
       return null;
    }
    public byte[] getNextTLV() {
       SubRawTLV stlv=tlv.findNextSubTLV();
       if(stlv!=null)
       return stlv.getValue();
       return null;
    }


}