int2of5barcode.java

这是个国外JAVA爱好者写的条形码生成器

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 * Copyright (c) 2003, International Barcode Consortium
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * 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.
 * Neither the name of the International Barcode Consortium nor the names of any contributors may be used to endorse
 * or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR
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package net.sourceforge.barbecue.linear.twoOfFive;

import net.sourceforge.barbecue.BarcodeException;
import net.sourceforge.barbecue.BlankModule;
import net.sourceforge.barbecue.Module;
import net.sourceforge.barbecue.Modulo10;
import net.sourceforge.barbecue.SeparatorModule;
import net.sourceforge.barbecue.linear.LinearBarcode;

import java.util.ArrayList;
import java.util.List;
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

/**
 * This is a concrete implementation of the Interleave 2 of 5 barcode
 * 
 * The Interleave 2 of 5 barcode requires an even number of characters. At
 * the same time, a modulo 10 check digit can be used.  The default constructor
 * presumes that if the barcode is of an odd length, then a check digit is 
 * required.  This will automaticaly be generated.
 * If the constructor with the check digit flag is used, the check digit flag is
 * flase and the length of the barcode is odd, then an exception will be thrown.
 *
 * @author <a href="mailto:[e-mail]">James Jenner</a>
 */
public class Int2of5Barcode extends Std2of5Barcode {
    /**
     * Constructs a new Interleave 2 of 5 barcode with the specified data.
     * No check digit will be added
     * @param data The data to encode
     * @throws BarcodeException If the data is invalid
     */
    public Int2of5Barcode(String data) throws BarcodeException {
        this(data, false);
    }
    
    /**
     * Constructs a new Interleave 2 of 5 barcode with thte specified data.
     * @param data The data to encode
     * @param checkDigit if true then a check digit is automaticaly appened to data
     * @throws BarcodeException If the data is invalid
     */
    public Int2of5Barcode(String data, boolean checkDigit) throws BarcodeException {
        super(checkDigit ? data + Modulo10.getMod10CheckDigit(data, 3) : data);
    }
    
    /**
     * Returns the pre-amble for the barcode.
     * @return A BlankModule
     */
    protected Module getPreAmble() {
        return Int2of5ModuleFactory.START_CHAR;
    }
    
    /**
     * Returns the post-amble for the barcode.
     * @return A BlankModule
     */
    protected Module getPostAmble() {
        return Int2of5ModuleFactory.END_CHAR;
    }
    
    /**
     * Encodes the data of the barcode into bars.
     * @return The encoded bar data
     */
    protected Module[] encodeData() {
        List modules = new ArrayList();
        
        for(int i = 0; i < data.length() - 1; i += 2) {
            Module module = Int2of5ModuleFactory.getModule(String.valueOf(data.charAt(i)), String.valueOf(data.charAt(i + 1)));
            
            modules.add(module);
        }
        
        return (Module[])modules.toArray(new Module[0]);
    }
    
    protected void validateData() throws BarcodeException {
        if(data.length() % 2 != 0) {
            throw new BarcodeException("The Interleave 2 of 5 encoding requires an even number of data");
        }
        
        super.validateData();
    }
}