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package eu.dnetlib.oai.mongo;
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import eu.dnetlib.miscutils.functional.UnaryFunction;
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import org.dom4j.Document;
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import org.dom4j.Node;
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/**
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* Function to deliver only the about/provenance content of a record as XML String.
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*/
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public class ProvenanceExtractor implements UnaryFunction<String, Document> {
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@Override
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public String evaluate(final Document xmlDoc) {
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// Node provenanceNode = xmlDoc.selectSingleNode("//*[local-name() = 'about']/*[local-name() = 'provenance']");
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Node provenanceNode = xmlDoc.selectSingleNode("/*[local-name()='record']/*[local-name() = 'about']/*[local-name() = 'provenance']");
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if (provenanceNode != null) return provenanceNode.asXML();
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else return null;
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}
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}
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