74 lines
1.7 KiB
Java
74 lines
1.7 KiB
Java
package org.gcube.informationsystem.discovery.knowledge;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.ServiceLoader;
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import org.gcube.informationsystem.discovery.RegistrationProvider;
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/**
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* @author Luca Frosini (ISTI - CNR)
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*/
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public class Knowledge {
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private static Knowledge instance;
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public static Knowledge getInstance() throws Exception {
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return getInstance(false);
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}
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public static Knowledge getInstance(boolean forceRediscover) throws Exception {
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if(forceRediscover) {
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instance = null;
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}
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if(instance == null) {
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instance = new Knowledge();
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instance.discover();
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}
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return instance;
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}
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protected ModelKnowledge allKnowledge;
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protected Map<String, ModelKnowledge> modelKnowledges;
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private Knowledge() {
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}
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public ModelKnowledge getAllKnowledge() {
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return allKnowledge;
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}
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public ModelKnowledge getModelKnowledges(RegistrationProvider rp) {
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return modelKnowledges.get(rp.getModelName());
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}
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public ModelKnowledge getModelKnowledges(String modelName) {
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return modelKnowledges.get(modelName);
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}
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public void discover() throws Exception {
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allKnowledge = new ModelKnowledge();
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modelKnowledges = new LinkedHashMap<>();
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ServiceLoader<? extends RegistrationProvider> registrationProviders = ServiceLoader
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.load(RegistrationProvider.class);
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for(RegistrationProvider rp : registrationProviders) {
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ModelKnowledge modelKnowledge = new ModelKnowledge();
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modelKnowledges.put(rp.getModelName(), modelKnowledge);
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modelKnowledge.addRegistrationProvider(rp);
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modelKnowledge.createKnowledge();
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allKnowledge.addRegistrationProvider(rp);
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}
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allKnowledge.createKnowledge();
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}
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}
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