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Avoid ArrayIndexOutOfBoundsException on coordSeq when there are extra commands than specified in header #53

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Avoid ArrayIndexOutOfBoundsException on coordSeq when there are extra commands than specified in header #53

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6 changes: 5 additions & 1 deletion src/main/java/com/wdtinc/mapbox_vector_tile/adapt/jts/MvtReader.java
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Original file line number Diff line number Diff line change
Expand Up @@ -211,9 +211,13 @@ private static Geometry readPoints(GeometryFactory geomFactory, List<Integer> ge

// Guard: header data unsupported by geometry command buffer
// (require header and at least 1 value * 2 params)
if(cmdLength * GeomCmd.MoveTo.getParamCount() + 1 > geomCmds.size()) {
int requiredgeomCmdsLength = cmdLength * GeomCmd.MoveTo.getParamCount() + 1;
if(requiredgeomCmdsLength > geomCmds.size()) {
return null;
}
if (requiredgeomCmdsLength < geomCmds.size()) {
geomCmds = geomCmds.subList(0, requiredgeomCmdsLength); // ignore extra commands... should it return null instead?
}

final CoordinateSequence coordSeq = geomFactory.getCoordinateSequenceFactory().create(cmdLength, 2);
int coordIndex = 0;
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