barcode.java

一个java操作pdf文件的开发包,很好用的.

/*
 * Copyright 2002 by Paulo Soares.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */
package com.lowagie.text.pdf;

import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Rectangle;
import com.lowagie.text.Image;
import java.awt.Color;
/** Base class containing properties and methods commom to all
 * barcode types.
 *
 * @author Paulo Soares ([e-mail])
 */
public abstract class Barcode {
    /** A type of barcode */
    public static final int EAN13 = 1;
    /** A type of barcode */
    public static final int EAN8 = 2;
    /** A type of barcode */
    public static final int UPCA = 3;
    /** A type of barcode */
    public static final int UPCE = 4;
    /** A type of barcode */
    public static final int SUPP2 = 5;
    /** A type of barcode */
    public static final int SUPP5 = 6;
    /** A type of barcode */
    public static final int POSTNET = 7;
    /** A type of barcode */
    public static final int PLANET = 8;
    /** A type of barcode */
    public static final int CODE128 = 9;
    /** A type of barcode */
    public static final int CODE128_UCC = 10;
    /** A type of barcode */
    public static final int CODE128_RAW = 10;
    /** A type of barcode */
    public static final int CODABAR = 11;

    /** The minimum bar width.
     */
    protected float x;    

    /** The bar multiplier for wide bars or the distance between
     * bars for Postnet and Planet.
     */
    protected float n;
    
    /** The text font. <CODE>null</CODE> if no text.
     */
    protected BaseFont font;

    /** The size of the text or the height of the shorter bar
     * in Postnet.
     */    
    protected float size;
    
    /** If positive, the text distance under the bars. If zero or negative,
     * the text distance above the bars.
     */
    protected float baseline;
    
    /** The height of the bars.
     */
    protected float barHeight;
    
    /** The text alignment. Can be <CODE>Element.ALIGN_LEFT</CODE>,
     * <CODE>Element.ALIGN_CENTER</CODE> or <CODE>Element.ALIGN_RIGHT</CODE>.
     */
    protected int textAlignment;
    
    /** The optional checksum generation.
     */
    protected boolean generateChecksum;
    
    /** Shows the generated checksum in the the text.
     */
    protected boolean checksumText;
    
    /** Show the start and stop character '*' in the text for
     * the barcode 39 or 'ABCD' for codabar.
     */
    protected boolean startStopText;
    
    /** Generates extended barcode 39.
     */
    protected boolean extended;
    
    /** The code to generate.
     */
    protected String code = "";
    
    /** Show the guard bars for barcode EAN.
     */
    protected boolean guardBars;
    
    /** The code type.
     */
    protected int codeType;
    
    /** Gets the minimum bar width.
     * @return the minimum bar width
     */
    public float getX() {
        return x;
    }
    
    /** Sets the minimum bar width.
     * @param x the minimum bar width
     */
    public void setX(float x) {
        this.x = x;
    }
    
    /** Gets the bar multiplier for wide bars.
     * @return the bar multiplier for wide bars
     */
    public float getN() {
        return n;
    }
    
    /** Sets the bar multiplier for wide bars.
     * @param n the bar multiplier for wide bars
     */
    public void setN(float n) {
        this.n = n;
    }
    
    /** Gets the text font. <CODE>null</CODE> if no text.
     * @return the text font. <CODE>null</CODE> if no text
     */
    public BaseFont getFont() {
        return font;
    }
    
    /** Sets the text font. <CODE>null</CODE> if no text.
     * @param font the text font. <CODE>null</CODE> if no text
     */
    public void setFont(BaseFont font) {
        this.font = font;
    }
    
    /** Gets the size of the text.
     * @return the size of the text
     */
    public float getSize() {
        return size;
    }
    
    /** Sets the size of the text.
     * @param size the size of the text
     */
    public void setSize(float size) {
        this.size = size;
    }
    
    /** Gets the text baseline.
     * If positive, the text distance under the bars. If zero or negative,
     * the text distance above the bars.
     * @return the baseline.
     */
    public float getBaseline() {
        return baseline;
    }
    
    /** Sets the text baseline. 
     * If positive, the text distance under the bars. If zero or negative,
     * the text distance above the bars.
     * @param baseline the baseline.
     */
    public void setBaseline(float baseline) {
        this.baseline = baseline;
    }
    
    /** Gets the height of the bars.
     * @return the height of the bars
     */
    public float getBarHeight() {
        return barHeight;
    }
    
    /** Sets the height of the bars.
     * @param barHeight the height of the bars
     */
    public void setBarHeight(float barHeight) {
        this.barHeight = barHeight;
    }
    
    /** Gets the text alignment. Can be <CODE>Element.ALIGN_LEFT</CODE>,
     * <CODE>Element.ALIGN_CENTER</CODE> or <CODE>Element.ALIGN_RIGHT</CODE>.
     * @return the text alignment
     */
    public int getTextAlignment() {
        return textAlignment;
    }
    
    /** Sets the text alignment. Can be <CODE>Element.ALIGN_LEFT</CODE>,
     * <CODE>Element.ALIGN_CENTER</CODE> or <CODE>Element.ALIGN_RIGHT</CODE>.
     * @param textAlignment the text alignment
     */
    public void setTextAlignment(int textAlignment) {
        this.textAlignment = textAlignment;
    }
    
    /** Gets the optional checksum generation.
     * @return the optional checksum generation
     */
    public boolean isGenerateChecksum() {
        return generateChecksum;
    }
    
    /** Setter for property generateChecksum.
     * @param generateChecksum New value of property generateChecksum.
     */
    public void setGenerateChecksum(boolean generateChecksum) {
        this.generateChecksum = generateChecksum;
    }
    
    /** Gets the property to show the generated checksum in the the text.
     * @return value of property checksumText
     */
    public boolean isChecksumText() {
        return checksumText;
    }
    
    /** Sets the property to show the generated checksum in the the text.
     * @param checksumText new value of property checksumText
     */
    public void setChecksumText(boolean checksumText) {
        this.checksumText = checksumText;
    }
    
    /** Sets the property to show the start and stop character '*' in the text for
     * the barcode 39.
     * @return value of property startStopText
     */
    public boolean isStartStopText() {
        return startStopText;
    }
    
    /** Gets the property to show the start and stop character '*' in the text for
     * the barcode 39.
     * @param startStopText new value of property startStopText
     */
    public void setStartStopText(boolean startStopText) {
        this.startStopText = startStopText;
    }
    
    /** Gets the property to generate extended barcode 39.
     * @return value of property extended.
     */
    public boolean isExtended() {
        return extended;
    }
    
    /** Sets the property to generate extended barcode 39.
     * @param extended new value of property extended
     */
    public void setExtended(boolean extended) {
        this.extended = extended;
    }
    
    /** Gets the code to generate.
     * @return the code to generate
     */
    public String getCode() {
        return code;
    }
    
    /** Sets the code to generate.
     * @param code the code to generate
     */
    public void setCode(String code) {
        this.code = code;
    }
    
    /** Gets the property to show the guard bars for barcode EAN.
     * @return value of property guardBars
     */
    public boolean isGuardBars() {
        return guardBars;
    }
    
    /** Sets the property to show the guard bars for barcode EAN.
     * @param guardBars new value of property guardBars
     */
    public void setGuardBars(boolean guardBars) {
        this.guardBars = guardBars;
    }
    
    /** Gets the code type.
     * @return the code type
     */
    public int getCodeType() {
        return codeType;
    }
    
    /** Sets the code type.
     * @param codeType the code type
     */
    public void setCodeType(int codeType) {
        this.codeType = codeType;
    }
    
    /** Gets the maximum area that the barcode and the text, if
     * any, will occupy. The lower left corner is always (0, 0).
     * @return the size the barcode occupies.
     */    
    public abstract Rectangle getBarcodeSize();
    
    /** Places the barcode in a <CODE>PdfContentByte</CODE>. The
     * barcode is always placed at coodinates (0, 0). Use the
     * translation matrix to move it elsewhere.<p>
     * The bars and text are written in the following colors:<p>
     * <P><TABLE BORDER=1>
     * <TR>
     *    <TH><P><CODE>barColor</CODE></TH>
     *    <TH><P><CODE>textColor</CODE></TH>
     *    <TH><P>Result</TH>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P>bars and text painted with current fill color</TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>barColor</CODE></TD>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>null</CODE></TD>
     *    <TD><P><CODE>textColor</CODE></TD>
     *    <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
     *    </TR>
     * <TR>
     *    <TD><P><CODE>barColor</CODE></TD>
     *    <TD><P><CODE>textColor</CODE></TD>
     *    <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
     *    </TR>
     * </TABLE>
     * @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the dimensions the barcode occupies
     */    
    public abstract Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor);
    
    /** Creates a template with the barcode.
     * @param cb the <CODE>PdfContentByte</CODE> to create the template. It
     * serves no other use
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the template
     * @see #placeBarcode(PdfContentByte cb, Color barColor, Color textColor)
     */    
    public PdfTemplate createTemplateWithBarcode(PdfContentByte cb, Color barColor, Color textColor) {
        PdfTemplate tp = cb.createTemplate(0, 0);
        Rectangle rect = placeBarcode(tp, barColor, textColor);
        tp.setBoundingBox(rect);
        return tp;
    }
    
    /** Creates an <CODE>Image</CODE> with the barcode.
     * @param cb the <CODE>PdfContentByte</CODE> to create the <CODE>Image</CODE>. It
     * serves no other use
     * @param barColor the color of the bars. It can be <CODE>null</CODE>
     * @param textColor the color of the text. It can be <CODE>null</CODE>
     * @return the <CODE>Image</CODE>
     * @see #placeBarcode(PdfContentByte cb, Color barColor, Color textColor)
     */    
    public Image createImageWithBarcode(PdfContentByte cb, Color barColor, Color textColor) {
        try {
            return Image.getInstance(createTemplateWithBarcode(cb, barColor, textColor));
        }
        catch (Exception e) {
            throw new ExceptionConverter(e);
        }
    }
}