https://issues.apache.org/bugzilla/show_bug.cgi?id=46618
Summary: NPE when changing an element during animation
Product: Batik
Version: 1.8
Platform: PC
OS/Version: Windows Server 2003
Status: NEW
Severity: normal
Priority: P2
Component: Animation engine
AssignedTo: [email protected]
ReportedBy: [email protected]
JDK: 1.6.0_07
Batik: batik-src-09-01-04.zip
When you have an animated element and you change e.g. the border colour you get
a NullPointerException.
SVG file cut:
<rect x="20" y="20" width="100" height="100"
style="stroke:#ffffff;stroke-width:1;" fill="blue" id="hlRect">
<animate attributeType="CSS" attributeName="opacity" from="1" to="0"
begin="0s;blue_fade_in.end" dur="1s" id="blue_fade_out"/>
<animate attributeType="CSS" attributeName="opacity" from="0" to="1"
begin="blue_fade_out.end" dur="1s" id="blue_fade_in"/>
</rect>
In this case it's a simple rect but the same will happen when you animate a
group which contains elements on which you perform the action.
When you start the application the animation will run as expected. As soon as
you change e.g. the stroke colour with Java you'll get a NPE.
Java code cut:
svgCanvas.getUpdateManager().getUpdateRunnableQueue().invokeLater(new
Runnable() {
public void run() {
SVGDocument svgDoc = svgCanvas.getSVGDocument();
Element hlElement = svgDoc.getElementById("hlRect");
((org.w3c.dom.svg.SVGStylable)hlElement).getStyle().setProperty("stroke",
"deepskyblue", "");
}
});
NPE:
java.lang.NullPointerException
at org.apache.batik.anim.timing.TimedElement.addInstanceTime(Unknown Source)
at org.apache.batik.anim.timing.SyncbaseTimingSpecifier.newInterval(Unknown
Source)
at org.apache.batik.anim.timing.TimedElement.notifyNewInterval(Unknown
Source)
at org.apache.batik.anim.timing.TimedElement.selectNewInterval(Unknown
Source)
at org.apache.batik.anim.timing.TimedElement.sampleAt(Unknown Source)
at org.apache.batik.anim.timing.TimedDocumentRoot.seekTo(Unknown Source)
at org.apache.batik.anim.AnimationEngine.tick(Unknown Source)
at org.apache.batik.bridge.SVGAnimationEngine.access$600(Unknown Source)
at
org.apache.batik.bridge.SVGAnimationEngine$AnimationTickRunnable.run(Unknown
Source)
at org.apache.batik.util.RunnableQueue.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)
This NPE will be displayed repeatedly.
Let me know if you need any more info.
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