Cleanup various sonar issues in policy-common

Addressed the following issues:
- unused imports
- unused method parameters
- use assertEquals, assertSame instead of assertTrue
- provide the parametrized type for this generic

Also fixed some checkstyle issues:
- removed blank lines between "import" groups

Issue-ID: POLICY-2650
Change-Id: I004bb650ac10c49ccd0fc405f6959896fec39f9b
Signed-off-by: Jim Hahn <jrh3@att.com>

6 files changed, 95 insertions, 91 deletions

diff --git a/integrity-monitor/src/main/java/org/onap/policy/common/im/IntegrityMonitor.java b/integrity-monitor/src/main/java/org/onap/policy/common/im/IntegrityMonitor.java
index d12a9bde..33c51e21 100644
--- a/integrity-monitor/src/main/java/org/onap/policy/common/im/IntegrityMonitor.java
+++ b/integrity-monitor/src/main/java/org/onap/policy/common/im/IntegrityMonitor.java
@@ -43,6 +43,7 @@ import javax.persistence.FlushModeType;
 import javax.persistence.LockModeType;
 import javax.persistence.Persistence;
 import javax.persistence.Query;
+import javax.persistence.TypedQuery;
 import org.apache.commons.lang3.StringUtils;
 import org.eclipse.persistence.config.PersistenceUnitProperties;
 import org.onap.policy.common.im.jmx.ComponentAdmin;
@@ -287,15 +288,15 @@ public class IntegrityMonitor {
     }
 
     protected void createOrUpdateForwardProgress(String resourceName) {
-        Query fquery = em.createQuery(QUERY_STRING);
+        TypedQuery<ForwardProgressEntity> fquery = em.createQuery(QUERY_STRING, ForwardProgressEntity.class);
         fquery.setParameter("rn", resourceName);
 
-        @SuppressWarnings("rawtypes")
-        List fpList = fquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+        List<ForwardProgressEntity> fpList =
+                        fquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
         ForwardProgressEntity fpx = null;
         if (!fpList.isEmpty()) {
             // ignores multiple results
-            fpx = (ForwardProgressEntity) fpList.get(0);
+            fpx = fpList.get(0);
             // refresh the object from DB in case cached data was returned
             em.refresh(fpx);
             if (logger.isDebugEnabled()) {
@@ -318,15 +319,17 @@ public class IntegrityMonitor {
     }
 
     protected void createOrUpdateResourceReg(String resourceName, String jmxUrl, EntityTransaction et) {
-        Query rquery = em.createQuery("Select r from ResourceRegistrationEntity r where r.resourceName=:rn");
+        TypedQuery<ResourceRegistrationEntity> rquery =
+                        em.createQuery("Select r from ResourceRegistrationEntity r where r.resourceName=:rn",
+                                        ResourceRegistrationEntity.class);
         rquery.setParameter("rn", resourceName);
 
-        @SuppressWarnings("rawtypes")
-        List rrList = rquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+        List<ResourceRegistrationEntity> rrList =
+                        rquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
         ResourceRegistrationEntity rrx = null;
         if (!rrList.isEmpty()) {
             // ignores multiple results
-            rrx = (ResourceRegistrationEntity) rrList.get(0);
+            rrx = rrList.get(0);
             // refresh the object from DB in case cached data was returned
             em.refresh(rrx);
             if (logger.isDebugEnabled()) {
@@ -555,41 +558,44 @@ public class IntegrityMonitor {
         AtomicReference<StateManagementEntity> stateManagementEntity = new AtomicReference<>();
 
         String errorMsg =
-                withinTransaction(dep + ": ForwardProgressEntity DB operation failed with exception: ", () -> {
-                    Query query =
-                            em.createQuery("Select p from ForwardProgressEntity p where p.resourceName=:resource");
-                    query.setParameter(LC_RESOURCE_STRING, dep);
+            withinTransaction(dep + ": ForwardProgressEntity DB operation failed with exception: ", () -> {
+                TypedQuery<ForwardProgressEntity> query = em.createQuery(
+                                "Select p from ForwardProgressEntity p where p.resourceName=:resource",
+                                ForwardProgressEntity.class);
+                query.setParameter(LC_RESOURCE_STRING, dep);
 
-                    @SuppressWarnings("rawtypes")
-                    List fpList =
-                            query.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+                List<ForwardProgressEntity> fpList = query.setLockMode(LockModeType.NONE)
+                                .setFlushMode(FlushModeType.COMMIT).getResultList();
 
-                    if (!fpList.isEmpty()) {
-                        // exists
-                        forwardProgressEntity.set((ForwardProgressEntity) fpList.get(0));
-                        // refresh the object from DB in case cached data was
-                        // returned
-                        em.refresh(forwardProgressEntity.get());
-                        logger.debug("Found entry in ForwardProgressEntity table for dependent Resource={}", dep);
-                        return null;
-
-                    } else {
-                        return dep + ": resource not found in ForwardProgressEntity database table";
-                    }
-                });
+                if (!fpList.isEmpty()) {
+                    // exists
+                    forwardProgressEntity.set(fpList.get(0));
+                    // refresh the object from DB in case cached data was
+                    // returned
+                    em.refresh(forwardProgressEntity.get());
+                    logger.debug("Found entry in ForwardProgressEntity table for dependent Resource={}",
+                                    dep);
+                    return null;
+
+                } else {
+                    return dep + ": resource not found in ForwardProgressEntity database table";
+                }
+            });
 
         if (errorMsg == null) {
             errorMsg = withinTransaction(dep + ": StateManagementEntity DB read failed with exception: ", () -> {
 
                 // query if StateManagement entry exists for dependent resource
-                Query query = em.createQuery("Select p from StateManagementEntity p where p.resourceName=:resource");
+                TypedQuery<StateManagementEntity> query =
+                                em.createQuery("Select p from StateManagementEntity p where p.resourceName=:resource",
+                                                StateManagementEntity.class);
                 query.setParameter(LC_RESOURCE_STRING, dep);
 
-                @SuppressWarnings("rawtypes")
-                List smList = query.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+                List<StateManagementEntity> smList =
+                                query.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
                 if (!smList.isEmpty()) {
                     // exist
-                    stateManagementEntity.set((StateManagementEntity) smList.get(0));
+                    stateManagementEntity.set(smList.get(0));
                     // refresh the object from DB in case cached data was
                     // returned
                     em.refresh(stateManagementEntity.get());
@@ -713,15 +719,15 @@ public class IntegrityMonitor {
     }
 
     private String fpCheck2(String dep) {
-        Query fquery = em.createQuery(QUERY_STRING);
+        TypedQuery<ForwardProgressEntity> fquery = em.createQuery(QUERY_STRING, ForwardProgressEntity.class);
         fquery.setParameter("rn", dep);
 
-        @SuppressWarnings("rawtypes")
-        List fpList = fquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+        List<ForwardProgressEntity> fpList =
+                        fquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
         ForwardProgressEntity fpx;
         if (!fpList.isEmpty()) {
             // ignores multiple results
-            fpx = (ForwardProgressEntity) fpList.get(0);
+            fpx = fpList.get(0);
             // refresh the object from DB in case cached data was returned
             em.refresh(fpx);
             if (logger.isDebugEnabled()) {
@@ -794,16 +800,18 @@ public class IntegrityMonitor {
 
     private String getJmxUrlFromDb(String dep, AtomicReference<String> jmxUrl) {
         // query if ResourceRegistration entry exists for resourceName
-        Query rquery = em.createQuery("Select r from ResourceRegistrationEntity r where r.resourceName=:rn");
+        TypedQuery<ResourceRegistrationEntity> rquery =
+                        em.createQuery("Select r from ResourceRegistrationEntity r where r.resourceName=:rn",
+                                        ResourceRegistrationEntity.class);
         rquery.setParameter("rn", dep);
 
-        @SuppressWarnings("rawtypes")
-        List rrList = rquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+        List<ResourceRegistrationEntity> rrList =
+                        rquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
         ResourceRegistrationEntity rrx = null;
 
         if (!rrList.isEmpty()) {
             // ignores multiple results
-            rrx = (ResourceRegistrationEntity) rrList.get(0);
+            rrx = rrList.get(0);
             // refresh the object from DB in case cached data was
             // returned
             em.refresh(rrx);
@@ -1197,15 +1205,15 @@ public class IntegrityMonitor {
 
         try {
             // query if ForwardProgress entry exists for resourceName
-            Query fquery = em.createQuery(QUERY_STRING);
+            TypedQuery<ForwardProgressEntity> fquery = em.createQuery(QUERY_STRING, ForwardProgressEntity.class);
             fquery.setParameter("rn", resourceName);
 
-            @SuppressWarnings("rawtypes")
-            List fpList = fquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+            List<ForwardProgressEntity> fpList =
+                            fquery.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
             ForwardProgressEntity fpx;
             if (!fpList.isEmpty()) {
                 // ignores multiple results
-                fpx = (ForwardProgressEntity) fpList.get(0);
+                fpx = fpList.get(0);
                 // refresh the object from DB in case cached data was returned
                 em.refresh(fpx);
                 if (logger.isDebugEnabled()) {
@@ -1544,14 +1552,16 @@ public class IntegrityMonitor {
 
         try {
             // query if StateManagement entry exists for fpe resource
-            Query query = em.createQuery("Select p from StateManagementEntity p where p.resourceName=:resource");
+            TypedQuery<StateManagementEntity> query =
+                            em.createQuery("Select p from StateManagementEntity p where p.resourceName=:resource",
+                                            StateManagementEntity.class);
             query.setParameter(LC_RESOURCE_STRING, fpe.getResourceName());
 
-            @SuppressWarnings("rawtypes")
-            List smList = query.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
+            List<StateManagementEntity> smList =
+                            query.setLockMode(LockModeType.NONE).setFlushMode(FlushModeType.COMMIT).getResultList();
             if (!smList.isEmpty()) {
                 // exists
-                sme = (StateManagementEntity) smList.get(0);
+                sme = smList.get(0);
                 // refresh the object from DB in case cached data was
                 // returned
                 em.refresh(sme);
diff --git a/integrity-monitor/src/main/java/org/onap/policy/common/im/jmx/ComponentAdmin.java b/integrity-monitor/src/main/java/org/onap/policy/common/im/jmx/ComponentAdmin.java
index bd7ed7b5..cf7a968f 100644
--- a/integrity-monitor/src/main/java/org/onap/policy/common/im/jmx/ComponentAdmin.java
+++ b/integrity-monitor/src/main/java/org/onap/policy/common/im/jmx/ComponentAdmin.java
@@ -2,14 +2,14 @@
  * ============LICENSE_START=======================================================
  * Integrity Monitor
  * ================================================================================
- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018, 2020 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.
  * 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.
@@ -22,7 +22,6 @@ package org.onap.policy.common.im.jmx;
 
 import java.util.ArrayList;
 import java.util.Iterator;
-
 import javax.management.InstanceAlreadyExistsException;
 import javax.management.InstanceNotFoundException;
 import javax.management.MBeanRegistrationException;
@@ -31,7 +30,6 @@ import javax.management.MBeanServerFactory;
 import javax.management.MalformedObjectNameException;
 import javax.management.NotCompliantMBeanException;
 import javax.management.ObjectName;
-
 import org.onap.policy.common.im.IntegrityMonitor;
 import org.onap.policy.common.im.IntegrityMonitorException;
 import org.onap.policy.common.im.StateManagement;
@@ -54,7 +52,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Constructor.
-     * 
+     *
      * @param name the MBean name
      * @param integrityMonitor the integrity monitor
      * @param stateManager the state manager
@@ -81,7 +79,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Registers with the MBean server.
-     * 
+     *
      * @throws ComponentAdminException a JMX exception
      */
     public synchronized void register() throws ComponentAdminException {
@@ -114,7 +112,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Checks if this MBean is registered with the MBeanServer.
-     * 
+     *
      * @return true if this MBean is registered with the MBeanServer.
      */
     public boolean isRegistered() {
@@ -123,7 +121,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Unregisters with the MBean server.
-     * 
+     *
      * @throws ComponentAdminException a JMX exception
      */
     public synchronized void unregister() throws ComponentAdminException {
@@ -151,7 +149,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Finds the MBeanServer.
-     * 
+     *
      * @return the MBeanServer, or null if it is not found
      */
     public static MBeanServer findMBeanServer() {
@@ -172,7 +170,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Creates the MBeanServer (intended for unit testing only).
-     * 
+     *
      * @return the MBeanServer
      */
     public static MBeanServer createMBeanServer() {
@@ -181,7 +179,7 @@ public class ComponentAdmin implements ComponentAdminMBean {
 
     /**
      * Get the MBean object name for the specified feature name.
-     * 
+     *
      * @param componentName component name
      * @return the object name
      * @throws MalformedObjectNameException a JMX exception
diff --git a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ForwardProgressEntity.java b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ForwardProgressEntity.java
index f0ea2c00..0e0c24c6 100644
--- a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ForwardProgressEntity.java
+++ b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ForwardProgressEntity.java
@@ -2,14 +2,14 @@
  * ============LICENSE_START=======================================================
  * Integrity Monitor
  * ================================================================================
- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018, 2020 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.
  * 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.
@@ -22,7 +22,6 @@ package org.onap.policy.common.im.jpa;
 
 import java.io.Serializable;
 import java.util.Date;
-
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -91,7 +90,7 @@ public class ForwardProgressEntity implements Serializable {
 
     /**
      * Get the forward progress Id.
-     * 
+     *
      * @return the Id
      */
     public long getForwardProgressId() {
@@ -108,7 +107,7 @@ public class ForwardProgressEntity implements Serializable {
 
     /**
      * Get the fpcCount.
-     * 
+     *
      * @return the fpcCount
      */
     public long getFpcCount() {
@@ -117,7 +116,7 @@ public class ForwardProgressEntity implements Serializable {
 
     /**
      * Set the fpcCount.
-     * 
+     *
      * @param fpcCount the fpcCount to set
      */
     public void setFpcCount(long fpcCount) {
@@ -126,7 +125,7 @@ public class ForwardProgressEntity implements Serializable {
 
     /**
      * Get the lastUpdated.
-     * 
+     *
      * @return the lastUpdated
      */
     public Date getLastUpdated() {
@@ -135,7 +134,7 @@ public class ForwardProgressEntity implements Serializable {
 
     /**
      * Set the lastUpdated.
-     * 
+     *
      * @param lastUpdated the lastUpdated to set
      */
     public void setLastUpdated(Date lastUpdated) {
diff --git a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ImTestEntity.java b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ImTestEntity.java
index 1822578b..6c710f27 100644
--- a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ImTestEntity.java
+++ b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ImTestEntity.java
@@ -2,14 +2,14 @@
  * ============LICENSE_START=======================================================
  * Integrity Monitor
  * ================================================================================
- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018, 2020 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.
  * 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.
@@ -22,7 +22,6 @@ package org.onap.policy.common.im.jpa;
 
 import java.io.Serializable;
 import java.util.Date;
-
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -87,7 +86,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Get the Im test Id.
-     * 
+     *
      * @return the Id
      */
     public long getImTestId() {
@@ -96,7 +95,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Get the createdBy.
-     * 
+     *
      * @return the createdBy
      */
     public String getCreatedBy() {
@@ -105,7 +104,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Set the createdBy.
-     * 
+     *
      * @param createdBy the createdBy to set
      */
     public void setCreatedBy(String createdBy) {
@@ -114,7 +113,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Get the modifiedBy.
-     * 
+     *
      * @return the modifiedBy
      */
     public String getModifiedBy() {
@@ -123,7 +122,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Set the ModifiedBy.
-     * 
+     *
      * @param modifiedBy the modifiedBy to set
      */
     public void setModifiedBy(String modifiedBy) {
@@ -132,7 +131,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Get the modifiedDate.
-     * 
+     *
      * @return the modifiedDate
      */
     public Date getModifiedDate() {
@@ -141,7 +140,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Set the modifiedDate.
-     * 
+     *
      * @param modifiedDate the modifiedDate to set
      */
     public void setModifiedDate(Date modifiedDate) {
@@ -150,7 +149,7 @@ public class ImTestEntity implements Serializable {
 
     /**
      * Get the createdDate.
-     * 
+     *
      * @return the createdDate
      */
     public Date getCreatedDate() {
diff --git a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ResourceRegistrationEntity.java b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ResourceRegistrationEntity.java
index 42e141aa..e23553fa 100644
--- a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ResourceRegistrationEntity.java
+++ b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/ResourceRegistrationEntity.java
@@ -2,14 +2,14 @@
  * ============LICENSE_START=======================================================
  * Integrity Monitor
  * ================================================================================
- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018, 2020 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.
  * 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.
@@ -22,7 +22,6 @@ package org.onap.policy.common.im.jpa;
 
 import java.io.Serializable;
 import java.util.Date;
-
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -99,7 +98,7 @@ public class ResourceRegistrationEntity implements Serializable {
 
     /**
      * Get the resource registration Id.
-     * 
+     *
      * @return the Id
      */
     public long getResourceRegistrationId() {
@@ -140,7 +139,7 @@ public class ResourceRegistrationEntity implements Serializable {
 
     /**
      * Get the createdDate.
-     * 
+     *
      * @return the createdDate
      */
     public Date getCreatedDate() {
@@ -149,7 +148,7 @@ public class ResourceRegistrationEntity implements Serializable {
 
     /**
      * Get the lastUpdated.
-     * 
+     *
      * @return the lastUpdated
      */
     public Date getLastUpdated() {
@@ -158,7 +157,7 @@ public class ResourceRegistrationEntity implements Serializable {
 
     /**
      * Set the lastUpdated.
-     * 
+     *
      * @param lastUpdated the lastUpdated to set
      */
     public void setLastUpdated(Date lastUpdated) {
diff --git a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/StateManagementEntity.java b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/StateManagementEntity.java
index 494931d2..30677814 100644
--- a/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/StateManagementEntity.java
+++ b/integrity-monitor/src/main/java/org/onap/policy/common/im/jpa/StateManagementEntity.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * Integrity Monitor
  * ================================================================================
- * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2020 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.
@@ -22,7 +22,6 @@ package org.onap.policy.common.im.jpa;
 
 import java.io.Serializable;
 import java.util.Date;
-
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;