Address sonar issues in drools-pdp

Addressed the following sonar issues:
- add "final" to public static fields
- commented code; some were bogus - just updated the comments
  so sonar is happy
- use "{}" instead of string concatenation
- junit should assert something
- when using logger, invoke compute-intensive tasks conditionally
- use superclass name instead of subclass name to access static fields
- don't always return the same value
- remove "transient" from fields of classes that aren't Serializable
- don't nest try/catch blocks
- use appropriate class name in Logger.getLogger()
- use Predicate<T> instead of Function<T,Boolean>
- remove unused parameters from private methods
- either log or throw
- remove duplicate methods
- use remove() TLS instead of set(null)
- null check is implicit in instanceof check
- do something with return value
- don't use volatile
- don't return "null" list; used Optional instead
- add no-arg constructor to non-Serializable superclass
- add callSuper=true for EqualsAndHashCode
- don't declare "throws XXX" where XXX is a subclass of RuntimeException
- remove serialVersionUID field if the class isn't Serializable

Also addressed some eclipse warnings:
- unused fields
- suppress generic typic cast warnings

Issue-ID: POLICY-2305
Change-Id: I906d5bf71c1f86531423e23b3667a585cdba45e1
Signed-off-by: Jim Hahn <jrh3@att.com>

3 files changed, 3 insertions, 8 deletions

diff --git a/policy-domains/src/test/java/org/onap/policy/drools/domain/models/DroolsPolicyTest.java b/policy-domains/src/test/java/org/onap/policy/drools/domain/models/DroolsPolicyTest.java
index c6e8990e..98ddd4c8 100644
--- a/policy-domains/src/test/java/org/onap/policy/drools/domain/models/DroolsPolicyTest.java
+++ b/policy-domains/src/test/java/org/onap/policy/drools/domain/models/DroolsPolicyTest.java
@@ -32,6 +32,7 @@ import com.openpojo.validation.test.impl.SetterTester;
 import java.io.Serializable;
 import java.util.List;
 import lombok.Data;
+import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import lombok.experimental.SuperBuilder;
 import org.junit.Test;
@@ -41,6 +42,7 @@ public class DroolsPolicyTest {
     @Data
     @SuperBuilder
     @NoArgsConstructor
+    @EqualsAndHashCode(callSuper = true)
     public static class DerivedDomainPolicy extends DroolsPolicy implements Serializable {
         private static final long serialVersionUID = -1027974819756498893L;
     }
diff --git a/policy-domains/src/test/java/org/onap/policy/drools/domain/models/legacy/LegacyPolicyTest.java b/policy-domains/src/test/java/org/onap/policy/drools/domain/models/legacy/LegacyPolicyTest.java
index 7eb2532f..13e91cc0 100644
--- a/policy-domains/src/test/java/org/onap/policy/drools/domain/models/legacy/LegacyPolicyTest.java
+++ b/policy-domains/src/test/java/org/onap/policy/drools/domain/models/legacy/LegacyPolicyTest.java
@@ -38,7 +38,7 @@ public class LegacyPolicyTest {
     private static final String OPERATIONAL_LEGACY_POLICY_TYPE = "onap.policies.controlloop.Operational";
 
     // Operational vCPE Legacy Policy
-    private static final String OP_POLICY_NAME_VCPE = "operational.restart";
+    public static final String OP_POLICY_NAME_VCPE = "operational.restart";
     public static final String VCPE_OPERATIONAL_LEGACY_POLICY_JSON = "src/test/resources/tosca-legacy-vcpe.json";
 
     @Test
diff --git a/policy-domains/src/test/java/org/onap/policy/drools/domain/models/operational/OperationalPolicyTest.java b/policy-domains/src/test/java/org/onap/policy/drools/domain/models/operational/OperationalPolicyTest.java
index bf50a3df..8f37b47c 100644
--- a/policy-domains/src/test/java/org/onap/policy/drools/domain/models/operational/OperationalPolicyTest.java
+++ b/policy-domains/src/test/java/org/onap/policy/drools/domain/models/operational/OperationalPolicyTest.java
@@ -23,9 +23,6 @@ package org.onap.policy.drools.domain.models.operational;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Paths;
 import java.util.List;
 import org.junit.Before;
 import org.junit.Test;
@@ -102,10 +99,6 @@ public class OperationalPolicyTest {
         assertNotNull(policy);
     }
 
-    private String getJsonFromFile(String filePath) throws IOException {
-        return Files.readString(Paths.get(filePath));
-    }
-
     private String getJsonFromResource(String resourcePath) {
         return ResourceUtils.getResourceAsString(resourcePath);
     }