I've just upgraded to version 1.3 from 1.01 of iText. Running my existing application, I found I got the stack trace:
java.lang.NullPointerException at com.lowagie.text.pdf.ColumnText.findLimitsPoint(ColumnText.java:477) at com.lowagie.text.pdf.ColumnText.findLimitsOneLine(ColumnText.java:493) at com.lowagie.text.pdf.ColumnText.findLimitsTwoLines(ColumnText.java:514) at com.lowagie.text.pdf.ColumnText.go(ColumnText.java:823) at com.lowagie.text.pdf.ColumnText.go(ColumnText.java:721) [snip]
After running through a debugger I discovered that rightWall and leftWall were always null, and hence the NPE.
Comparing ColumnText from 1.01 and 1.3 I noticed that in the method setSimpleColumn() in 1.01 calls the method setColumns() is called which performs the assignment to rightWall and leftWall. This call is missing in 1.3. I've added the call back in and tested with my setup and it solves the exception for me.
Below is my revised method, which starts at line 573 in ColumnText.java:
public void setSimpleColumn(float llx, float lly, float urx, float ury,
float leading, int alignment)
{
setLeading(leading);
this.alignment = alignment;
setSimpleColumn(llx, lly, urx, ury);
float leftLine[] = new float[]{leftX, maxY, leftX, minY};
float rightLine[] = new float[]{rightX, maxY, rightX, minY};
setColumns(leftLine, rightLine);
}
Hope this helps! Thanks.
-- Mike Fowler Registered Linux user: 379787
"I could be a genius if I just put my mind to it, and I, I could do anything, if only I could get 'round to it"
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