forked from D-Net/dnet-hadoop
avoid NPEs in Vocabulary.getTermBySynonym
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@ -63,7 +63,10 @@ public class Vocabulary implements Serializable {
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}
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public VocabularyTerm getTermBySynonym(final String syn) {
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return getTerm(synonyms.get(syn.toLowerCase()));
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return Optional
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.ofNullable(syn)
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.map(s -> getTerm(synonyms.get(s.toLowerCase())))
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.orElse(null);
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}
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public Qualifier getTermAsQualifier(final String termId) {
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