https://issues.apache.org/bugzilla/show_bug.cgi?id=50362
Summary: NullPointException after calling image transcoder API
while appending child element
Product: Batik
Version: 1.7
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: SVG Rasterizer
AssignedTo: [email protected]
ReportedBy: [email protected]
Hi, With JSVGCanvas I load predefinded svg skeleton image and add various kind
of elements like rectangle, circle, polyline etc later.
New elements can be added unlimited numer of times until svg is converted to
jpeg using transcoder API fith the folowing lines
String
skeletalImagePath=System.getProperty("java.io.tmpdir")+"\\skeleton.jpg";
try {
JPEGTranscoder t = new JPEGTranscoder();
// Set the transcoding hints.
t.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, new Float(.99));
TranscoderInput input = new TranscoderInput(doc);
// Create the transcoder output.
OutputStream ostream = new FileOutputStream(skeletalImagePath);
TranscoderOutput output = new TranscoderOutput(ostream);
// Save the image.
try {
t.transcode(input, output);
} catch (TranscoderException et) {
et.printStackTrace();
}
// Flush and close the stream.
ostream.flush();
ostream.close();
} catch (FileNotFoundException eu) {
JOptionPane.showMessageDialog(null, eu.getMessage(), "",
JOptionPane.INFORMATION_MESSAGE);
eu.printStackTrace();
} catch (IOException et) {
JOptionPane.showMessageDialog(null, et.getMessage(), "",
JOptionPane.INFORMATION_MESSAGE);
et.printStackTrace();
}
After that if new element is added using folowing function null point exection
error appears.
private void addPMDefect(final int x,final int y,final int bodyPartBoneId,
final int id){
UpdateManager um = jSVGCanvas1.getUpdateManager();
um.getUpdateRunnableQueue().invokeLater(new Runnable() {
public void run() {
SVGElement svgRoot = svgDocument.getRootElement();
String dot1,dot2,dot3, dot4;
dot1=Integer.toString(x-15)+","+Integer.toString(y+5);
dot2=Integer.toString(x-5)+","+Integer.toString(y-5);
dot3=Integer.toString(x+5)+","+Integer.toString(y+5);
dot4=Integer.toString(x+15)+","+Integer.toString(y-5);
Element el = svgDocument.createElementNS (svgNS, "polyline");
el.setAttributeNS (null, "fill", "none");
el.setAttributeNS (null, "stroke", PMDefectColor);
el.setAttributeNS (null, "stroke-width", "2");
el.setAttributeNS (null, "points", dot1+" "+dot2+" "+dot3+" "+dot4);
el.setAttributeNS (null, "id", "observ1"+Integer.toString(id));
svgRoot.appendChild(el);
}
}
);
}
Error message:
java.lang.NullPointerException
at
org.apache.batik.bridge.CSSUtilities.convertDisplay(CSSUtilities.java:565)
at
org.apache.batik.bridge.AbstractGraphicsNodeBridge.getDisplay(AbstractGraphicsNodeBridge.java:158)
at org.apache.batik.bridge.GVTBuilder.build(GVTBuilder.java:134)
at
org.apache.batik.bridge.SVGGElementBridge.handleElementAdded(SVGGElementBridge.java:123)
at
org.apache.batik.bridge.SVGGElementBridge.handleDOMNodeInsertedEvent(SVGGElementBridge.java:107)
at
org.apache.batik.bridge.BridgeContext$DOMNodeInsertedEventListener.handleEvent(BridgeContext.java:1601)
at
org.apache.batik.dom.events.EventSupport.fireEventListeners(EventSupport.java:324)
at
org.apache.batik.dom.events.EventSupport.fireEventListeners(EventSupport.java:366)
at
org.apache.batik.dom.events.EventSupport.dispatchEvent(EventSupport.java:258)
at org.apache.batik.dom.AbstractNode.dispatchEvent(AbstractNode.java:1014)
at
org.apache.batik.dom.AbstractParentNode.fireDOMNodeInsertedEvent(AbstractParentNode.java:422)
at
org.apache.batik.dom.AbstractParentNode.appendChild(AbstractParentNode.java:224)
at view.JSkeletonCanvas$6.run(JSkeletonCanvas.java:351)
at org.apache.batik.util.RunnableQueue.run(RunnableQueue.java:237)
at java.lang.Thread.run(Thread.java:619)
Line 351 is: svgRoot.appendChild(el);
Am I doind something wrong?
Thanks
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