code39.java

生成二维条形码的java程序

/*
 * Copyright 2002-2004 Jeremias Maerki.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.krysalis.barcode4j.impl.code39;

import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.krysalis.barcode4j.ChecksumMode;
import org.krysalis.barcode4j.impl.ConfigurableBarcodeGenerator;
import org.krysalis.barcode4j.tools.Length;

/**
 * This class is an implementation of the Code39 barcode.
 * 
 * @author Jeremias Maerki
 * @version $Id: Code39.java,v 1.3 2008/05/14 08:05:08 jmaerki Exp $
 */
public class Code39 extends ConfigurableBarcodeGenerator 
            implements Configurable {

    /** Create a new instance. */
    public Code39() {
        this.bean = new Code39Bean();
    }
    
    /**
     * @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
     */
    public void configure(Configuration cfg) throws ConfigurationException {
        //Module width (MUST ALWAYS BE FIRST BECAUSE QUIET ZONE MAY DEPEND ON IT)
        Length mw = new Length(cfg.getChild("module-width").getValue("0.19mm"), "mm");
        getCode39Bean().setModuleWidth(mw.getValueAsMillimeter());

        super.configure(cfg);
    
        //Checksum mode    
        getCode39Bean().setChecksumMode(ChecksumMode.byName(
            cfg.getChild("checksum").getValue(ChecksumMode.CP_AUTO.getName())));
    
        //Wide factor    
        getCode39Bean().setWideFactor(
            cfg.getChild("wide-factor").getValueAsFloat((float)Code39Bean.DEFAULT_WIDE_FACTOR));
    
        //Inter-character gap width    
        Length igw = new Length(cfg.getChild("interchar-gap-width").getValue("1mw"), "mw");
        if (igw.getUnit().equalsIgnoreCase("mw")) {
            getCode39Bean().setIntercharGapWidth(
                    igw.getValue() * getCode39Bean().getModuleWidth());
        } else {
            getCode39Bean().setIntercharGapWidth(igw.getValueAsMillimeter());
        }
        
        if (cfg.getChild("extended-charset", false) != null) {
            getCode39Bean().setExtendedCharSetEnabled(
                    cfg.getChild("extended-charset").getValueAsBoolean());
        }
        
        Configuration hr = cfg.getChild("human-readable", false);
        if (hr != null) {
            //Display start/stop character and checksum in hr-message or not
            getCode39Bean().setDisplayStartStop(
                    hr.getChild("display-start-stop").getValueAsBoolean(false));
            getCode39Bean().setDisplayChecksum(
                    hr.getChild("display-checksum").getValueAsBoolean(false));
        }
    }
   
    /**
     * @return the underlying Code39Bean
     */
    public Code39Bean getCode39Bean() {
        return (Code39Bean)getBean();
    }

}