I am having problems creating an updating a barcode object within a class.
My barcode class is created as follows:
public void addBarcode39(String bartype, String barcode,
String minbarwidth, String barmultiply,
String barfontbase, String barfontttf,
String barencoding, String barembedded, String barfontsize,
String baseline, String barheight, String textalign,
String checksum,String startstop, String extended,
String barcolourR, String barcolourG, String barcolourB,
String textcolourR, String textcolourG, String
textcolourB,
String barunder, String barposX, String barposY) {
// Create class instance
iPDFBarcode39 bar39 = new iPDFBarcode39(bartype.trim(),
barcode.trim(),
minbarwidth.trim(), barmultiply.trim(),
barfontbase.trim(), barfontttf.trim(),
barencoding.trim(), barembedded.trim(),
barfontsize.trim(), baseline.trim(), barheight.trim(),
textalign.trim(), checksum.trim(), startstop.trim(),
extended.trim(),
barcolourR.trim(), barcolourG.trim(), barcolourB.trim(),
textcolourR.trim(), textcolourG.trim(),
textcolourB.trim(),
barunder.trim(), barposX.trim(), barposY.trim());
// Add barcode39 array element
vBar.add(Barcode39);
vBar.add(bar39);
vBarcode.add(vBar);
}
// Set bar code
public void setBarcode(Barcode39 barcode, String code) {
// Set bar code
barcode.setCode(code);
}
The source for the iPDFBarcode39 class is shown below:
/***************************************************************************************************
* Author.........: Paul Manners
* Creation Date..:
* Copyright
**************************************************************************************************/
import org.apache.commons.lang.StringUtils;
import com.lowagie.text.Element;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Font;
import com.lowagie.text.FontFactory;
import java.awt.Color;
import com.lowagie.text.pdf.Barcode;
import com.lowagie.text.pdf.Barcode39;
import com.lowagie.text.pdf.BaseFont;
public class iPDFBarcode39 {
private String pbartype = "";
private String pbarcode = "";
private String pminbarwidth = "";
private String pbarmultiply = "";
private String pbarfontbase = "";
private String pbarfontttf = "";
private String pbarencoding = "";
private String pbarembedded = "";
private String pbarfontsize = "";
private String pbaseline = "";
private String pbarheight = "";
private String ptextalign = "";
private String pchecksum = "";
private String pstartstop = "";
private String pextended = "";
private String pbarcolourR = "";
private String pbarcolourG = "";
private String pbarcolourB = "";
private String ptextcolourR = "";
private String ptextcolourG = "";
private String ptextcolourB = "";
private String pbarunder = "";
private String pbarposX = "";
private String pbarposY = "";
private float fminbarwidth = 0;
private float fbarmultiply = 0;
private float fbarfontsize = 0;
private float fbaseline = 0;
private float fbarheight = 0;
private float fbarcolourR = 0;
private float fbarcolourG = 0;
private float fbarcolourB = 0;
private float ftextcolourR = 0;
private float ftextcolourG = 0;
private float ftextcolourB = 0;
private float fbarposX = 0;
private float fbarposY = 0;
private boolean notblank;
private boolean usebasefont;
private boolean barfontembedded = false;
private boolean barchecksum = false;
private boolean barstartstop = false;
private boolean barextended = false;
private Font stdbarfont;
private Font ttfbarfont;
private BaseFont stdbasebar;
private BaseFont ttfbasebar;
private Color ipdfbarcolor;
private Color ipdftextcolor;
public String barcodetype;
public Barcode39 ipdfbar39;
// Barcode constants
public static final String BarcodeType = "Barcode39";
// Boolean constants
public static final String Yes = "Y";
public static final String No = "N";
// Alignment constants
public static final String Left = "LEFT";
public static final String Middle = "MIDDLE";
public static final String Right = "RIGHT";
iPDFBarcode39(String bartype, String barcode, String minbarwidth,
String barmultiply, String barfontbase, String barfontttf,
String barencoding, String barembedded,
String barfontsize, String baseline, String barheight,
String textalign, String checksum, String startstop,
String extended,
String barcolourR, String barcolourG, String barcolourB,
String textcolourR, String textcolourG, String textcolourB,
String barunder, String barposX, String barposY) {
try {
// Setup instance variables
this.barcodetype = BarcodeType;
this.pbartype = bartype;
this.pbarcode = barcode;
this.pminbarwidth = minbarwidth;
this.pbarmultiply = barmultiply;
this.pbarfontbase = barfontbase;
this.pbarfontttf = barfontttf;
this.pbarencoding = barencoding;
this.pbarembedded = barembedded;
this.pbarfontsize = barfontsize;
this.pbaseline = baseline;
this.pbarheight = barheight;
this.ptextalign = textalign;
this.pchecksum = checksum;
this.pstartstop = startstop;
this.pextended = extended;
this.pbarcolourR = barcolourR;
this.pbarcolourG = barcolourG;
this.pbarcolourB = barcolourB;
this.ptextcolourR = textcolourR;
this.ptextcolourG = textcolourG;
this.ptextcolourB = textcolourB;
this.pbarunder = barunder;
this.pbarposX = barposX;
this.pbarposY = barposY;
this.fbarposX = Float.valueOf(barposX.trim()).floatValue();
this.fbarposY = Float.valueOf(barposY.trim()).floatValue();
// Font embedded
if (barembedded.trim().equals(Yes)) {
this.barfontembedded = true;
} else {
this.barfontembedded = false;
}
// Bar checksum
if (checksum.trim().equals(Yes)) {
this.barchecksum = true;
} else {
this.barchecksum = false;
}
// Bar start/stop text
if (startstop.trim().equals(Yes)) {
this.barstartstop = true;
} else {
this.barstartstop = false;
}
// Bar extended flag
if (extended.trim().equals(Yes)) {
this.barextended = true;
} else {
this.barextended = false;
}
// Check if barcode provided
notblank = StringUtils.isNotBlank(this.pbarcode.trim());
// Barcode provided
if (notblank == true) {
setBarcode(this.ipdfbar39, barcode);
// Set bar colour
setBarColour(barcolourR, barcolourG,
barcolourB);
// Set bar text colour
setTextColour(textcolourR, textcolourG,
textcolourB);
// Set minimum bar width
setMinBarWidth(minbarwidth);
// Set font
setFont(barfontbase, barfontttf,
barencoding,
this.barfontembedded,
barfontsize);
// Set bar baseline
setBarBaseline(baseline);
// Set bar multiplier for wide bars
setBarMultiply(barmultiply);
// Set bar height
setBarHeight(barheight);
// Set text alignment
setTextAlign(textalign);
// Set checksum
setChecksum(this.barchecksum);
// Set start/stop text
setStartStop(this.barstartstop);
// Set bar extended flag
setBarExtended(this.barextended);
}
}
catch(Exception e) {
throw new ExceptionConverter(e);
}
}
iPDFBarcode39() {
}
// Set bar code
public void setBarcode(Barcode39 barcode, String code) {
// Set bar code
barcode.setCode(code);
}
// Set minimum bar width
public void setMinBarWidth(String minbarwidth) {
if (minbarwidth.trim() != "") {
// Convert to float
this.fminbarwidth =
Float.valueOf(minbarwidth.trim()).floatValue();
// Set minimum bar width
this.ipdfbar39.setX(this.fminbarwidth);
}
}
// Set bar multiplier for wide bars
public void setBarMultiply(String barmultiply) {
if (barmultiply.trim() != "") {
// Convert to float
this.fbarmultiply =
Float.valueOf(barmultiply.trim()).floatValue();
// Set bar multiplier
this.ipdfbar39.setN(this.fbarmultiply);
}
}
// Set bar baseline
public void setBarBaseline(String baseline) {
if (baseline.trim() != "") {
// Convert to float
this.fbaseline =
Float.valueOf(baseline.trim()).floatValue();
// Set bar multiplier
this.ipdfbar39.setBaseline(this.fbaseline);
}
}
// Set bar height
public void setBarHeight(String barheight) {
if (barheight.trim() != "") {
// Convert to float
this.fbarheight =
Float.valueOf(barheight.trim()).floatValue();
// Set bar multiplier
this.ipdfbar39.setBarHeight(this.fbarheight);
}
}
// Set bar checksum
public void setChecksum(boolean checksum) {
// Set checksum
this.ipdfbar39.setChecksumText(checksum);
}
// Set bar Start/Stop
public void setStartStop(boolean startstop) {
// Set checksum
this.ipdfbar39.setStartStopText(startstop);
}
// Set bar Extended
public void setBarExtended(boolean extended) {
// Set extended flag
this.ipdfbar39.setExtended(extended);
}
// Set bar text alignment
public void setTextAlign(String textalign) {
// Left
if (textalign.trim().equals(Left)) {
this.ipdfbar39.setTextAlignment(Element.ALIGN_LEFT);
}
// Middle
if (textalign.trim().equals(Middle)) {
this.ipdfbar39.setTextAlignment(Element.ALIGN_CENTER);
}
// Right
if (textalign.trim().equals(Right)) {
this.ipdfbar39.setTextAlignment(Element.ALIGN_RIGHT);
}
}
// Set bar colour
public void setBarColour(String barcolourR, String barcolourG, String
barcolourB) {
if ((barcolourR.trim() != "") &&
(barcolourG.trim() != "") &&
(barcolourB.trim() != "")) {
// Convert to float
this.fbarcolourR =
Float.valueOf(barcolourR.trim()).floatValue();
this.fbarcolourG =
Float.valueOf(barcolourG.trim()).floatValue();
this.fbarcolourB =
Float.valueOf(barcolourB.trim()).floatValue();
// Create colour object
this.ipdfbarcolor = new
Color(fbarcolourR,fbarcolourG,fbarcolourB);
} else {
// Create colour object
this.ipdfbarcolor = null;
}
}
// Set bar text colour
public void setTextColour(String textcolourR, String textcolourG, String
textcolourB) {
if ((textcolourR.trim() != "") &&
(textcolourG.trim() != "") &&
(textcolourB.trim() != "")) {
// Convert to float
this.ftextcolourR =
Float.valueOf(textcolourR.trim()).floatValue();
this.ftextcolourG =
Float.valueOf(textcolourG.trim()).floatValue();
this.ftextcolourB =
Float.valueOf(textcolourB.trim()).floatValue();
// Create colour object
this.ipdftextcolor = new
Color(ftextcolourR,ftextcolourG,ftextcolourB);
} else {
// Create colour object
this.ipdftextcolor = null;
}
}
// Set bar font
public void setFont(String barfontbase, String barfontttf,
String barencoding, boolean barembedded,
String barfontsize) {
try {
if (barfontbase.trim() != "" || barfontttf.trim() !=
"") {
// Font size
this.fbarfontsize =
Float.valueOf(barfontsize.trim()).floatValue();
// Check if base font required
usebasefont =
StringUtils.isNotBlank(barfontbase.trim());
// Base font required
if (usebasefont == true) {
// Standard font
this.stdbarfont =
FontFactory.getFont(barfontbase, barfontsize);
this.stdbasebar =
getFontBase(this.stdbarfont);
} else {
this.ttfbasebar =
BaseFont.createFont(barfontttf, barencoding,
barembedded);
}
}
}
catch(Exception e) {
throw new ExceptionConverter(e);
}
}
// Retrieve base font from font object
BaseFont getFontBase(Font font) {
return font.getBaseFont();
}
public String getBartype() {
return pbartype;
}
public String getBarcode() {
return pbarcode;
}
public String getMinbarwidth() {
return pminbarwidth;
}
public String getBarmultiply() {
return pbarmultiply;
}
public String getBarfontbase() {
return pbarfontbase;
}
public String getBarfontttf() {
return pbarfontttf;
}
public String getBarfontsize() {
return pbarfontsize;
}
public String getBaseline() {
return pbaseline;
}
public String getBarheight() {
return pbarheight;
}
public String getTextalign() {
return ptextalign;
}
public String getChecksum() {
return pchecksum;
}
public String getStartstop() {
return pstartstop;
}
public String getExtended() {
return pextended;
}
public String getBarcolourR() {
return pbarcolourR;
}
public String getBarcolourG() {
return pbarcolourG;
}
public String getBarcolourB() {
return pbarcolourB;
}
public String getTextcolourR() {
return ptextcolourR;
}
public String getTextcolourG() {
return ptextcolourG;
}
public String getTextcolourB() {
return ptextcolourB;
}
public String getBarunder() {
return pbarunder;
}
public String getBarposX() {
return pbarposX;
}
public String getBarposY() {
return pbarposY;
}
}
The problem occurs during the
setBarcode(this.ipdfbar39, barcode);
function...
When the setCode procedure is run...
// Set bar code
public void setBarcode(Barcode39 barcode, String code) {
// Set bar code
barcode.setCode(code);
}
..I get the following exception thrown:
************Beginning of data**************
java.lang.NullPointerException
at iPDFBarcode39.setBarcode(iPDFBarcode39.java:205)
at iPDFBarcode39.<init>(iPDFBarcode39.java:163)
at RPGiPDF.addBarcode39(RPGiPDF.java:547)
************End of Data********************
The barcode object is shown below:
EVAL barcode
barcode = null
barcode.BARS = ******
barcode.CHARS = ******
barcode.EXTENDED = ******
I was under the impression that when a new class was constructed, that all
variables within that class are also constructed and that these variables
could then be used. I'm not sure if this is an iText issue or my java.
Any assistance on this issue would be most appreciated.
Thanks
Paul
--
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