DO NOT REPLY New: - ArrayIndexOutOfBoundsException in DOMTreeManager.appendGroup

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http://issues.apache.org/bugzilla/show_bug.cgi?id=40686

           Summary: ArrayIndexOutOfBoundsException in
                    DOMTreeManager.appendGroup
           Product: Batik
           Version: 1.6
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: SVG DOM
        AssignedTo: batik-devxmlgraphics.apache.org
        ReportedBy: bernd.fechnerwerum.de


I'm getting the following exception from time to time, when
generating a complex
chart graphic:

java.lang.ArrayIndexOutOfBoundsException: 28 >= 10
	at java.util.Vector.elementAt(Vector.java:432)
	at
org.apache.batik.svggen.DOMTreeManager.appendGroup(DOMTreeMa
nager.java:175)
	at
org.apache.batik.svggen.DOMGroupManager.addElement(DOMGroupM
anager.java:159)
	at
org.apache.batik.svggen.SVGGraphics2D.fill(SVGGraphics2D.jav
a:1384)
	at
org.apache.batik.ext.awt.g2d.AbstractGraphics2D.drawGlyphVec
tor(AbstractGraphics2D.java:960)
	at
sun.font.ExtendedTextSourceLabel.handleDraw(ExtendedTextSour
ceLabel.java:131)
	at
sun.font.Decoration.drawTextAndDecorations(Decoration.java:9
9)
	at
sun.font.ExtendedTextSourceLabel.draw(ExtendedTextSourceLabe
l.java:135)
	at java.awt.font.TextLine.draw(TextLine.java:550)
	at java.awt.font.TextLayout.draw(TextLayout.java:2699)
	at com.werum.chartgen.Axis.drawYAxis(Axis.java:313)
	at com.werum.chartgen.Axis.draw(Axis.java:130)
	at
com.werum.chartgen.CoordPlane.drawAxes(CoordPlane.java:165)
	at com.werum.chartgen.CoordPlane.draw(CoordPlane.java:138)
	at com.werum.chartgen.Chart.draw(Chart.java:144)
	at com.werum.chartgen.Chart.draw(Chart.java:155)
	at
com.werum.chartgen.test.TestChart02.run(TestChart02.java:87)
	at
com.werum.chartgen.test.TestChart02.main(TestChart02.java:26
1)

The code of method DOMTreeManager.appendGroup is rather
short:

    public void appendGroup(Element group, DOMGroupManager
groupManager){
        topLevelGroup.appendChild(group);
        int nManagers = groupManagers.size();
        for(int i=0; i<nManagers; i++){
            DOMGroupManager gm =
(DOMGroupManager)groupManagers.elementAt(i);
            if( gm != groupManager )
                gm.recycleCurrentGroup();
        }
    }

I think the problem has something to do with the disposer
thread running in the
background and modifying the 'groupManagers' Vector during
the iteration. This
happens when SVGGraphics2D objects are disposed:

    public void dispose() {
       
this.domTreeManager.removeGroupManager(this.domGroupManager)
;
    }

My proposal is to protect the 'groupManagers' Vector against
modifications
during iterations in class DOMTreeManager. Because I have
compiled batik from
source, I will make the modification and test it in my
environment.

Currently I'm working on a Fedora Core5 Linux using Eclipse
3.2 and JDK
1.5.0_09, but I have seen the same problem on a Windows XP
environment.

Bernd

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