forked from D-Net/dnet-hadoop
added check for null value during doi normalization
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@ -358,6 +358,8 @@ object DoiBoostMappingUtil {
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def isEmpty(x: String) = x == null || x.trim.isEmpty
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def normalizeDoi(input : String) :String ={
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if(input == null)
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return null
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val replaced = input.replaceAll("(?:\\n|\\r|\\t|\\s)", "").toLowerCase.replaceFirst(DOI_PREFIX_REGEX, DOI_PREFIX)
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if (isEmpty(replaced))
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return null
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