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package eu.dnetlib.clients.index.query;
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import java.util.List;
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import java.util.Map;
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import com.google.common.collect.BiMap;
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import com.google.common.collect.HashBiMap;
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import com.google.common.collect.Maps;
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import eu.dnetlib.clients.index.client.IndexClientException;
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import eu.dnetlib.clients.index.utils.IndexFieldUtility;
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import eu.dnetlib.clients.index.utils.MDFormatReader;
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import eu.dnetlib.clients.index.utils.MetadataReference;
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import eu.dnetlib.clients.index.utils.ServiceTools;
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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.dom4j.Document;
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import org.dom4j.Element;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Required;
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/**
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* The Class BrowseAliases.
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*/
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public class BrowseAliases {
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(BrowseAliases.class); // NOPMD
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/**
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* The aliases.
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*/
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private Map<MetadataReference, BiMap<String, String>> aliases = Maps.newConcurrentMap();
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private ServiceTools serviceTools;
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@Autowired
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private MDFormatReader mdFormatReader;
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/**
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* Initialize.
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* <p>
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* the index service exception
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*/
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public void initialize() throws IndexClientException {
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log.info("initializing browse aliases");
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for (MetadataReference mdRef : getServiceTools().listMDRefs()) {
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log.debug("inside foreach");
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put(mdRef);
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}
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log.info("browse aliases initialization completed");
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}
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/**
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* Put.
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*
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* @param mdRef the metadata refeference
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*/
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public void put(final MetadataReference mdRef) {
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final Document fields = mdFormatReader.getFields(mdRef);
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if (fields != null) {
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aliases.put(mdRef, extractBrowsingAliases(fields));
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} else {
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// log.info("couldn't find any");
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BiMap<String, String> m = HashBiMap.create();
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aliases.put(mdRef, m);
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}
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}
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/**
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* Gets the.
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*
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* @param mdRef the md ref
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* @return browsing aliases for given mdRef.
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* @throws IndexClientException
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*/
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public BiMap<String, String> get(final MetadataReference mdRef) throws IndexClientException {
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if ((aliases == null) || (aliases.size() == 0)) {
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initialize();
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}
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return aliases.get(mdRef);
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}
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/**
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* Method extract aliases field names from the given fields.
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*
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* @param fields the fields
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* @return aliases map. Keys are "normal" field names, values are names of the non-tokenized version of the field
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*/
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protected BiMap<String, String> extractBrowsingAliases(final Document fields) {
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// default tokenizer splits field names, this would cause to
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// have too many browsing results, so we use an untokenized
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// alias in place of it.
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final BiMap<String, String> aliases = HashBiMap.create();
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@SuppressWarnings("unchecked")
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final List<Element> fieldList = fields.getRootElement().selectNodes(IndexFieldUtility.XPATH_BROWSING_ALIAS_FOR);
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for (final Element e : fieldList) {
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final String name = e.attribute(IndexFieldUtility.FIELD_BROWSING_ALIAS_FOR).getValue().toLowerCase();
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final String alias = e.attribute(IndexFieldUtility.FIELD_NAME).getValue().toLowerCase();
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aliases.put(name, alias);
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}
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if (aliases.isEmpty()) {
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log.warn("couldn'f find alias fields for browsing");
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}
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return aliases;
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}
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/**
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* @return the serviceTools
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*/
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public ServiceTools getServiceTools() {
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return serviceTools;
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}
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/**
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* @param serviceTools the serviceTools to set
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*/
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@Required
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public void setServiceTools(final ServiceTools serviceTools) {
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this.serviceTools = serviceTools;
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}
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}
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