159 lines
4.8 KiB
Java
159 lines
4.8 KiB
Java
package org.gcube.datacatalogue.metadatadiscovery;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import org.gcube.common.scope.api.ScopeProvider;
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import org.gcube.common.scope.impl.ScopeBean;
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import org.gcube.datacatalogue.metadatadiscovery.bean.MetadataProfile;
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import org.gcube.datacatalogue.metadatadiscovery.bean.jaxb.MetadataFormat;
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import org.gcube.datacatalogue.metadatadiscovery.bean.jaxb.NamespaceCategory;
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import org.gcube.datacatalogue.metadatadiscovery.reader.MetadataFormatDiscovery;
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import org.gcube.datacatalogue.metadatadiscovery.reader.MetadataFormatReader;
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import org.gcube.datacatalogue.metadatadiscovery.reader.NamespaceCategoryReader;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* The Class DataCalogueMetadataReader.
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*
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* @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
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* Jun 8, 2016
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*/
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public class DataCalogueMetadataFormatReader implements DataCatalogueMetadataDiscovery{
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private MetadataFormatDiscovery medataFormatDiscovery;
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private ScopeBean scope;
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private Map<String, MetadataFormat> hashMetadataFormats = null;
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private List<NamespaceCategory> namespaceCategories = null;
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private static Logger logger = LoggerFactory.getLogger(DataCalogueMetadataFormatReader.class);
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/**
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* Instantiates a new data calogue metadata format reader.
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*
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* @throws Exception the exception
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*/
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public DataCalogueMetadataFormatReader() throws Exception {
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String scopeString = ScopeProvider.instance.get();
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logger.debug("Read scope "+scopeString +" from ScopeProvider");
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if(scopeString==null || scopeString.isEmpty())
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throw new Exception("Please set a valid scope into ScopeProvider");
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scope = new ScopeBean(scopeString);
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readNamespaces();
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readMetadaFormats();
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}
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/**
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* Read metada formats.
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*
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* @throws Exception the exception
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*/
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private void readMetadaFormats() throws Exception{
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medataFormatDiscovery = new MetadataFormatDiscovery(scope);
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logger.info("MedataFormatDiscovery has retrieved: "+medataFormatDiscovery.getMetadataProfiles().size() +" metadata type/s");
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logger.debug("filling cache for MedataFormat");
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hashMetadataFormats = new HashMap<String, MetadataFormat>(medataFormatDiscovery.getMetadataProfiles().size());
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for (MetadataProfile mT : medataFormatDiscovery.getMetadataProfiles()) {
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if(mT==null)
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continue;
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MetadataFormatReader reader = new MetadataFormatReader(scope, mT.getId());
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hashMetadataFormats.put(mT.getId(), reader.getMetadataFormat());
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logger.debug("MetadataType id: "+mT.getId() +" cached as: "+reader.getMetadataFormat());
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}
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}
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/**
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* Read namespaces.
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*/
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private void readNamespaces() {
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try{
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if(namespaceCategories == null || namespaceCategories.isEmpty()){
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if(namespaceCategories == null)
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namespaceCategories = new ArrayList<NamespaceCategory>();
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NamespaceCategoryReader rd = new NamespaceCategoryReader(scope);
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namespaceCategories.addAll(rd.getNamespaces().getNamespaceCategories());
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}
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}catch(Exception e){
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logger.debug("An error occurred during read namespaces for categories: ", e);
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}
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}
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/* (non-Javadoc)
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* @see org.gcube.datacatalogue.metadatadiscovery.DataCatalogueMetadataDiscovery#getMetadataFormatForMetadataType(org.gcube.datacatalogue.metadatadiscovery.bean.MetadataType)
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*/
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@Override
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public MetadataFormat getMetadataFormatForMetadataProfile(MetadataProfile profile) throws Exception {
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if(profile==null)
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throw new Exception("Input "+ MetadataProfile.class.getSimpleName() + " is null");
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MetadataFormat format = hashMetadataFormats.get(profile.getId());
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if(format!=null)
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return format;
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MetadataFormatReader reader = new MetadataFormatReader(scope, profile.getId());
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return reader.getMetadataFormat();
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}
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/* (non-Javadoc)
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* @see org.gcube.datacatalogue.metadatadiscovery.DataCatalogueMetadataDiscovery#getListOfMetadataTypes()
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*/
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@Override
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public List<MetadataProfile> getListOfMetadataProfiles() throws Exception {
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if(medataFormatDiscovery==null)
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readMetadaFormats();
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return medataFormatDiscovery.getMetadataProfiles();
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}
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/* (non-Javadoc)
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* @see org.gcube.datacatalogue.metadatadiscovery.DataCatalogueMetadataDiscovery#getListOfNamespaceCategories()
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*/
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@Override
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public List<NamespaceCategory> getListOfNamespaceCategories() throws Exception {
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if(namespaceCategories == null)
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readNamespaces();
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return namespaceCategories;
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}
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/* (non-Javadoc)
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* @see org.gcube.datacatalogue.metadatadiscovery.DataCatalogueMetadataDiscovery#resetMetadataProfile()
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*/
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@Override
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public void resetMetadataProfile() {
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medataFormatDiscovery = null;
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hashMetadataFormats = null;
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}
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/* (non-Javadoc)
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* @see org.gcube.datacatalogue.metadatadiscovery.DataCatalogueMetadataDiscovery#resetNamespaceCategories()
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*/
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@Override
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public void resetNamespaceCategories() {
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namespaceCategories = null;
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}
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}
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