Yet more sonar issues in drools-applications

removed unused imports and variable definitions
moved variable declarations above methods
refactored deeply nested if/while
removed code smell due to unecessary use of static keyword
moved string literals to left side of comparator
fixed logging of exceptions
immediately return expression instead of assigning it to the temporary variable

Change-Id: Idfd2a2bdf3c2f3bbfcb54a06b713d57bc867b3ab
Issue-ID: POLICY-1129
Signed-off-by: Joshua Reich <jreich@research.att.com>

2 files changed, 17 insertions, 18 deletions

diff --git a/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/ControlLoopEventManager.java b/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/ControlLoopEventManager.java
index 4ab7b494f..e9fc27734 100644
--- a/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/ControlLoopEventManager.java
+++ b/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/ControlLoopEventManager.java
@@ -499,9 +499,7 @@ public class ControlLoopEventManager implements LockCallback, Serializable {
                                                            this.currentOperation.getTargetEntity(),
                                                            this.onset.getRequestId(), this);
             this.targetLock = lock;
-            LockResult<GuardResult, TargetLock> lockResult = 
-                    LockResult.createLockResult(GuardResult.LOCK_ACQUIRED, lock);
-            return lockResult;
+            return LockResult.createLockResult(GuardResult.LOCK_ACQUIRED, lock);
         }
         //
         // Have we acquired it already?
diff --git a/controlloop/common/guard/src/main/java/org/onap/policy/guard/PipEngineGetStatus.java b/controlloop/common/guard/src/main/java/org/onap/policy/guard/PipEngineGetStatus.java
index 36bb36f5c..b61ab5d73 100644
--- a/controlloop/common/guard/src/main/java/org/onap/policy/guard/PipEngineGetStatus.java
+++ b/controlloop/common/guard/src/main/java/org/onap/policy/guard/PipEngineGetStatus.java
@@ -148,7 +148,7 @@ public class PipEngineGetStatus extends StdConfigurableEngine {
         try {
             pipResponse = pipFinder.getMatchingAttributes(pipRequest, this);
         } catch (PIPException ex) {
-            logger.error("getAttribute threw:", ex);
+            logger.error("getAttribute threw", ex);
             return null;
         }
         if (pipResponse == null) {
@@ -197,16 +197,17 @@ public class PipEngineGetStatus extends StdConfigurableEngine {
         Set<String> setUids = new HashSet<>();
         for (Attribute attributeUid : listUids) {
             Iterator<AttributeValue<String>> iterAttributeValues = attributeUid.findValues(DataTypes.DT_STRING);
-            if (iterAttributeValues != null) {
-                while (iterAttributeValues.hasNext()) {
-                    String uid = iterAttributeValues.next().getValue();
-                    if (uid != null) {
-                        setUids.add(uid);
-                    }
+            if (iterAttributeValues == null) {
+                continue;
+            }
+            while (iterAttributeValues.hasNext()) {
+                String uid = iterAttributeValues.next().getValue();
+                if (uid == null) {
+                    continue;
                 }
+                setUids.add(uid);
             }
         }
-
         return setUids;
     }
 
@@ -220,13 +221,13 @@ public class PipEngineGetStatus extends StdConfigurableEngine {
             props.put(Util.ECLIPSE_LINK_KEY_USER, PolicyEngine.manager.getEnvironmentProperty(Util.ONAP_KEY_USER));
             props.put(Util.ECLIPSE_LINK_KEY_PASS, PolicyEngine.manager.getEnvironmentProperty(Util.ONAP_KEY_PASS));
         } catch (NullPointerException e) {
-            logger.error("getStatusFromDB: {} when setting properties", e.getMessage());
+            logger.error("getStatusFromDb: when setting properties", e);
         }
         //
         // Set opsHistPu to the correct value and clear properties if necessary.
         //
         String opsHistPu = System.getProperty("OperationsHistoryPU");
-        if (opsHistPu == null || !opsHistPu.equals("TestOperationsHistoryPU")) {
+        if (!"TestOperationsHistoryPU".equals(opsHistPu)) {
             opsHistPu = "OperationsHistoryPU";
         } else {
             props.clear();
@@ -240,14 +241,14 @@ public class PipEngineGetStatus extends StdConfigurableEngine {
             emf = Persistence.createEntityManagerFactory(opsHistPu, props);
         } catch (Exception ex) {
             logger.error("PIP thread got Exception. Can't connect to Operations History DB -- {}", opsHistPu);
-            logger.error("getStatusFromDb threw: ", ex);
+            logger.error("getStatusFromDb threw", ex);
             return null;
         }
         try {
             em = emf.createEntityManager();
         } catch (Exception ex) {
             logger.error("PIP thread got Exception. Problem creating EntityManager");
-            logger.error("getStatusFromDb threw: ", ex);
+            logger.error("getStatusFromDb threw", ex);
             emf.close();
             return null;
         } 
@@ -269,7 +270,7 @@ public class PipEngineGetStatus extends StdConfigurableEngine {
         try {
             ret = ((String)nq.getSingleResult());
         } catch (NoResultException ex) {
-            logger.debug("NoResultException for getSingleResult()");
+            logger.debug("NoResultException for getSingleResult()", ex);
             ret = "NO_MATCHING_ENTRY";
         } catch (Exception ex) {
             logger.error("getStatusFromDB threw an exception", ex);
@@ -283,12 +284,12 @@ public class PipEngineGetStatus extends StdConfigurableEngine {
         try {
             em.close();
         } catch (Exception ex) {
-            logger.error("getStatusFromDB threw an exception ", ex);
+            logger.error("getStatusFromDB threw an exception", ex);
         }
         try {
             emf.close();
         } catch (Exception ex) {
-            logger.error("getStatusFromDB threw an exception ", ex);
+            logger.error("getStatusFromDB threw an exception", ex);
         }
         return ret;
     }