290 lines
8.6 KiB
Java
290 lines
8.6 KiB
Java
package org.gcube.datacatalogue.metadatadiscovery.reader;
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import static org.gcube.resources.discovery.icclient.ICFactory.client;
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import java.io.StringReader;
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import java.util.ArrayList;
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import java.util.List;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import org.gcube.common.resources.gcore.utils.XPathHelper;
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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.MetadataType;
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import org.gcube.resources.discovery.client.api.DiscoveryClient;
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import org.gcube.resources.discovery.client.queries.api.Query;
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import org.gcube.resources.discovery.client.queries.impl.QueryBox;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.w3c.dom.Node;
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import org.xml.sax.InputSource;
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/**
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* The Class MedataFormatReader.
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*
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* @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
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* @Jul 26, 2013
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*/
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public class MedataFormatReader {
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public static Logger logger = LoggerFactory.getLogger(MedataFormatReader.class);
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protected static final String DATA_CATALOGUE_METADATA_SECONDARY_TYPE = "DataCatalogueMetadata";
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private String secondaryType;
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private ScopeBean scope;
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private List<MetadataType> metadataTypes;
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private String resourceID;
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/**
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* Instantiates a new medata format reader.
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*
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* @param scope - the scope to be searched
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* @throws Exception the exception
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*/
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public MedataFormatReader(ScopeBean scope, String resourceID) throws Exception {
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this.scope = scope;
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this.resourceID = resourceID;
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this.metadataTypes = getMedataFormatByID();
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}
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/**
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* this method looks up the applicationProfile profile among the ones available in the infrastructure.
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*
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* @return the applicationProfile profile
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* @throws Exception the exception
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*/
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private List<MetadataType> getMedataFormatByID() throws Exception {
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logger.trace("read secondary type: "+secondaryType);
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if(this.scope==null)
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throw new Exception("Scope is null");
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String scopeString = this.scope.toString();
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logger.trace("read scope: "+scopeString);
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List<MetadataType> list = new ArrayList<MetadataType>();
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try {
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ScopeProvider.instance.set(scopeString);
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logger.info("scope provider set instance: "+scopeString);
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String queryString = getGcubeGenericQueryString(secondaryType);
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logger.trace("queryString: " +queryString);
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Query q = new QueryBox(queryString);
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DiscoveryClient<String> client = client();
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List<String> appProfile = client.submit(q);
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if (appProfile == null || appProfile.size() == 0)
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throw new ApplicationProfileNotFoundException("Your applicationProfile is not registered in the infrastructure, the scope is "+scopeString);
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else {
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for (String elem : appProfile) {
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try{
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DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
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Node node = docBuilder.parse(new InputSource(new StringReader(elem))).getDocumentElement();
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XPathHelper helper = new XPathHelper(node);
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MetadataType meta = getMetadataTypeFromResource(helper);
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list.add(meta);
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}catch(Exception e){
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logger.error("Error while trying to fetch applicationProfile "+secondaryType+" from the infrastructure, ",e);
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}
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}
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}
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} catch (Exception e) {
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logger.error("Error while trying to fetch applicationProfile "+secondaryType+" from the infrastructure, "+e);
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return list;
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} finally{
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ScopeProvider.instance.reset();
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}
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return list;
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}
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/**
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* Gets the metadata type from resource.
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*
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* @param helper the helper
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* @return the metadata type from resource
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* @throws ApplicationProfileNotFoundException the application profile not found exception
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*/
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private MetadataType getMetadataTypeFromResource(XPathHelper helper) throws ApplicationProfileNotFoundException{
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try {
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MetadataType metaType = new MetadataType();
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List<String> id = helper.evaluate("/Resource/ID/text()");
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if(id==null || id.isEmpty())
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throw new ApplicationProfileNotFoundException("Resource ID not found for "+helper.toString());
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else{
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metaType.setId(id.get(0));
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}
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List<String> name = helper.evaluate("/Resource/Profile/Name/text()");
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if(name==null || name.isEmpty())
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throw new ApplicationProfileNotFoundException("Resource Name not found for "+helper.toString());
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else
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metaType.setName(name.get(0));
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List<String> description = helper.evaluate("/Resource/Profile/Description/text()");
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if(description==null || description.isEmpty())
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throw new ApplicationProfileNotFoundException("Resource Name not found for "+helper.toString());
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else
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metaType.setDescription(description.get(0));
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return metaType;
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} catch (Exception e) {
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logger.error("An error occurred in getListDefaultLayerFromNode ", e);
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return null;
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}
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}
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/**
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* Gets the metadata type from resource.
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*
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* @param secondaryType the secondary type
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* @return the metadata type from resource
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*/
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/*private MetadataType getMetadataTypeFromResource(XPathHelper helper) throws ApplicationProfileNotFoundException{
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List<String> metadataformat;
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List<GeoexplorerDefaultLayer> listGeoexplorerDefaultLayer = new ArrayList<GeoexplorerDefaultLayer>();
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try {
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metadataformat = helper.evaluate("/Resource/Profile/Body/metadataformat");
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if (metadataformat != null && metadataformat.size() > 0) {
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List<String> metadatafields = helper.evaluate("/Resource/Profile/Body/metadataformat/metadatafield/text()");
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List<String> currValue = null;
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for (String metafield : metadatafields) {
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logger.trace("found metafield : "+metafield);
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GeoexplorerDefaultLayer geoDefLayer = new GeoexplorerDefaultLayer();
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geoDefLayer.setUUID(uuid);
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geoDefLayer.setScope(scope.toString());
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// currValue = helper.evaluate("/Resource/Profile/Body/DefaultLayers/DefaultLayer[UUID='"+uuid+"']/@isBaseLayer");
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currValue = helper.evaluate("/Resource/Profile/Body/DefaultLayers/DefaultLayer[UUID='"+uuid+"']/IsBaseLayer/text()");
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logger.trace("is base layer?" +currValue);
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if (currValue != null && currValue.size() > 0){
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boolean isBase = Boolean.parseBoolean(currValue.get(0));
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geoDefLayer.setBaseLayer(isBase);
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// logger.trace("isBaseLayer : "+isBase);
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}
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currValue = helper.evaluate("/Resource/Profile/Body/DefaultLayers/DefaultLayer[UUID='"+uuid+"']/Description/text()");
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String descr = "";
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if (currValue != null && currValue.size() > 0) {
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descr = currValue.get(0);
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geoDefLayer.setDescription(descr);
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// logger.trace("description: "+descr+" for UUID: "+uuid);
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}
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currValue = helper.evaluate("/Resource/Profile/Body/DefaultLayers/DefaultLayer[UUID='"+uuid+"']/Name/text()");
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descr = "";
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if (currValue != null && currValue.size() > 0) {
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descr = currValue.get(0);
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geoDefLayer.setName(descr);
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// logger.trace("name: "+descr+" for UUID: "+uuid);
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}
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logger.trace("Filled object: "+geoDefLayer);
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listGeoexplorerDefaultLayer.add(geoDefLayer);
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}
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}
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else throw new ApplicationProfileNotFoundException("Your applicationProfile with scope "+scope.toString()+" is wrong, consider adding <DefaultLayer><UUID> element in <Body>");
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} catch (Exception e) {
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logger.error("An error occurred in getListDefaultLayerFromNode ", e);
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return listGeoexplorerDefaultLayer;
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}
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return listGeoexplorerDefaultLayer;
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}*/
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public synchronized String getGcubeGenericQueryString(String secondaryType){
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return "for $profile in collection('/db/Profiles/GenericResource')//Resource" +
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" where $profile/Profile/SecondaryType/string() eq '"+secondaryType+"'" +
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" return $profile";
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}
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/**
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* Gets the secondary type.
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*
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* @return the secondary type
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*/
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public String getSecondaryType() {
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return secondaryType;
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}
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/**
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* Gets the scope.
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*
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* @return the scope
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*/
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public ScopeBean getScope() {
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return scope;
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}
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/**
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* Gets the metadata types.
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*
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* @return the metadataTypes
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*/
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public List<MetadataType> getMetadataTypes() {
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return metadataTypes;
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}
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/**
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* The main method.
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*
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* @param args the arguments
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* @throws InterruptedException the interrupted exception
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*/
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public static void main(String[] args) throws InterruptedException {
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String scopeString = "/gcube/devsec/devVRE";
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final ScopeBean scope = new ScopeBean(scopeString);
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MedataFormatReader reader;
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try {
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reader = new MedataFormatReader(scope, "");
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System.out.println(reader.getMetadataTypes());
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// String value = "true";
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// if (value != null){
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// boolean isBase = Boolean.parseBoolean(value);
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// System.out.println(isBase);
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//// logger.trace("isBaseLayer : "+isBase);
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// }
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} catch (Exception e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
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