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package eu.dnetlib.index.solr.cql;
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import java.util.Map;
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import java.util.function.Function;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.solr.common.SolrException;
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import eu.dnetlib.clients.index.model.Any.ValueType;
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import eu.dnetlib.cql.CqlValueTransformerMap;
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/**
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* This class maps the fields in the given index schema with a transformation rule.
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*
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* @author marko
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*
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*/
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public class SolrTypeBasedCqlValueTransformerMap implements CqlValueTransformerMap {
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(SolrTypeBasedCqlValueTransformerMap.class); // NOPMD by marko on 11/24/08 5:02 PM
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/**
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* Index schema.
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*/
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private final Map<String, ValueType> schema;
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/**
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* Map of functions.
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*/
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private final Map<String, Function<String, String>> transformerMap;
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/**
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* Create value transformer map bound to a specific schema
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* @param schema
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* @param transformerMap
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*/
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public SolrTypeBasedCqlValueTransformerMap(final Map<String, ValueType> schema, final Map<String, Function<String, String>> transformerMap) {
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this.schema = schema;
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this.transformerMap = transformerMap;
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}
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/**
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* {@inheritDoc}
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*
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* @see CqlValueTransformerMap#transformerFor(String)
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*/
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@Override
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public Function<String, String> transformerFor(final String fieldName) {
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try {
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final ValueType field = schema.get(fieldName);
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if (field != null) {
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Function<String, String> res = transformerMap.get(field.name());
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if (res != null) {
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return res;
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}
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}
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} catch (SolrException e) {
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log.debug("cannot find field", e);
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}
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Function<String,String> identityFunction= (String s)->s;
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return identityFunction;
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}
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}
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