Create spring repository layer for PAP

This review adds the spring repository and service layers to PAP.
Once this is merged, the next work will be to actually use these
spring boot based services to talk to the db directly,
and not using policy-models-provider in PAP.

Change-Id: Ib086b8b405020cb452e51d6359dd1a69d0000f74
Issue-ID: POLICY-3869
Signed-off-by: a.sreekumar <ajith.sreekumar@bell.ca>

1 files changed, 152 insertions, 0 deletions

diff --git a/main/src/main/java/org/onap/policy/pap/main/service/PolicyStatusService.java b/main/src/main/java/org/onap/policy/pap/main/service/PolicyStatusService.java
new file mode 100644
index 00000000..09870314
--- /dev/null
+++ b/main/src/main/java/org/onap/policy/pap/main/service/PolicyStatusService.java
@@ -0,0 +1,152 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2022 Bell Canada. 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main.service;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+import javax.ws.rs.core.Response;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+import org.onap.policy.common.parameters.BeanValidationResult;
+import org.onap.policy.models.base.PfModelRuntimeException;
+import org.onap.policy.models.pdp.concepts.PdpPolicyStatus;
+import org.onap.policy.models.pdp.persistence.concepts.JpaPdpPolicyStatus;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifierOptVersion;
+import org.onap.policy.pap.main.repository.PolicyStatusRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class PolicyStatusService {
+
+    private final PolicyStatusRepository policyStatusRepository;
+
+    /**
+     * Gets all status for policies in a group.
+     *
+     * @param pdpGroup the group's name
+     * @return the policy status list found
+     */
+    public List<PdpPolicyStatus> getGroupPolicyStatus(@NonNull String pdpGroup) {
+        return asPolicyStatusList(policyStatusRepository.findByPdpGroup(pdpGroup));
+    }
+
+    /**
+     * Gets all status for policies.
+     *
+     * @return the policy status list found
+     */
+    public List<PdpPolicyStatus> getAllPolicyStatus() {
+        return asPolicyStatusList(policyStatusRepository.findAll());
+    }
+
+    /**
+     * Gets all status for a policy.
+     *
+     * @param policy the policy
+     * @return the policy status list found
+     */
+    public List<PdpPolicyStatus> getAllPolicyStatus(@NonNull ToscaConceptIdentifierOptVersion policy) {
+
+        if (policy.getVersion() != null) {
+            return asPolicyStatusList(policyStatusRepository
+                .findByKeyParentKeyNameAndKeyParentKeyVersion(policy.getName(), policy.getVersion()));
+
+        } else {
+            return asPolicyStatusList(policyStatusRepository.findByKeyParentKeyName(policy.getName()));
+        }
+    }
+
+    /**
+     * Gets all status for a policy in a group.
+     *
+     * @param pdpGroup the group's name
+     * @param policy the policy
+     * @return the policy status list found
+     */
+    public List<PdpPolicyStatus> getAllPolicyStatus(@NonNull String pdpGroup,
+        @NonNull ToscaConceptIdentifierOptVersion policy) {
+        if (policy.getVersion() != null) {
+            return asPolicyStatusList(policyStatusRepository.findByPdpGroupAndKeyParentKeyNameAndKeyParentKeyVersion(
+                pdpGroup, policy.getName(), policy.getVersion()));
+        } else {
+            return asPolicyStatusList(
+                policyStatusRepository.findByPdpGroupAndKeyParentKeyName(pdpGroup, policy.getName()));
+        }
+    }
+
+    /**
+     * Creates, updates, and deletes collections of policy status.
+     *
+     * @param createObjs the objects to create
+     * @param updateObjs the objects to update
+     * @param deleteObjs the objects to delete
+     */
+    public void cudPolicyStatus(Collection<PdpPolicyStatus> createObjs, Collection<PdpPolicyStatus> updateObjs,
+        Collection<PdpPolicyStatus> deleteObjs) {
+        try {
+            policyStatusRepository.deleteAll(fromAuthorativeStatus(deleteObjs, "deletePdpPolicyStatusList"));
+            policyStatusRepository.saveAll(fromAuthorativeStatus(createObjs, "createPdpPolicyStatusList"));
+            policyStatusRepository.saveAll(fromAuthorativeStatus(updateObjs, "updatePdpPolicyStatusList"));
+        } catch (Exception exc) {
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST,
+                "Policy status operation failed." + exc.getMessage(), exc);
+        }
+    }
+
+    /**
+     * Converts a collection of authorative policy status to a collection of JPA policy
+     * status. Validates the resulting list.
+     *
+     * @param objs authorative policy status to convert
+     * @param fieldName name of the field containing the collection
+     * @return a list of JPA policy status
+     */
+    private List<JpaPdpPolicyStatus> fromAuthorativeStatus(Collection<PdpPolicyStatus> objs, String fieldName) {
+        if (objs == null) {
+            return Collections.emptyList();
+        }
+
+        List<JpaPdpPolicyStatus> jpas = objs.stream().map(JpaPdpPolicyStatus::new).collect(Collectors.toList());
+
+        // validate the objects
+        var result = new BeanValidationResult(fieldName, jpas);
+
+        var count = 0;
+        for (JpaPdpPolicyStatus jpa : jpas) {
+            result.addResult(jpa.validate(String.valueOf(count++)));
+        }
+
+        if (!result.isValid()) {
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, result.getResult());
+        }
+
+        return jpas;
+    }
+
+    private List<PdpPolicyStatus> asPolicyStatusList(List<JpaPdpPolicyStatus> jpaPdpPolicyStatusList) {
+        return jpaPdpPolicyStatusList.stream().map(JpaPdpPolicyStatus::toAuthorative).collect(Collectors.toList());
+    }
+}