/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
package org.onap.policy.models.base;
+import jakarta.ws.rs.core.Response;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
-
-import javax.ws.rs.core.Response;
-
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
import lombok.NonNull;
/**
* exist in Policy Framework (particularly the engine) at any time. Of course the model in a JVM can be changed at any
* time provided all users of the model are stopped and restarted in an orderly manner.
*/
-public abstract class PfModelService {
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public final class PfModelService {
// The map holding the models
- private static Map<String, PfConcept> modelMap = new ConcurrentHashMap<>();
-
- /**
- * This class is an abstract static class that cannot be extended.
- */
- private PfModelService() {
- // Default constructor
- }
+ private static final Map<String, PfConcept> modelMap = new ConcurrentHashMap<>();
/**
* Register a model with the model service.
*
- * @param <M> the generic type
+ * @param <M> the generic type
* @param modelKey the key of the model, used to index the model
- * @param model The model
+ * @param model The model
*/
public static <M extends PfConcept> void registerModel(@NonNull final String modelKey, @NonNull final M model) {
modelMap.put(modelKey, model);
/**
* Get a model from the model service.
*
- * @param <M> the generic type
+ * @param <M> the generic type
* @param modelKey the key of the model, used to index the model
* @return The model
*/
@SuppressWarnings("unchecked")
public static <M extends PfConcept> M getModel(@NonNull final String modelKey) {
- final M model = (M) modelMap.get(modelKey);
+ final var model = (M) modelMap.get(modelKey);
if (model == null) {
throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR,
- "Model for name " + modelKey + " not found in model service");
+ "Model for name " + modelKey + " not found in model service");
}
return model;