Check for a reference before extraction.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@661 348d0f76-0448-11de-a6fe-93d51630548a
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@ -106,7 +106,8 @@ public class TraverseReads extends TraversalEngine {
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locus = new LocusContext(site, Arrays.asList(read), Arrays.asList(0));
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// get the array of characters for the reference sequence, since we're a mapped read
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refSeq = dataProvider.getReferenceForRead( read );
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if( dataProvider.hasReference() )
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refSeq = dataProvider.getReferenceForRead( read );
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}
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// update the number of reads we've seen
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