Fix Java 11/Checkstyle/Sonar warnings

A number of Java 11, checkstyle, and SONAR warnings have crept into the
Apex codebase over the last number of reviews. This change fixes those
issues.

Issue-ID: POLICY-1913
Change-Id: I2afd607e80f48323355380fb2fe5e048e18879f9
Signed-off-by: liamfallon <liam.fallon@est.tech>

3 files changed, 23 insertions, 40 deletions

diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml
index 1e91322dc..c2c154685 100644
--- a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/pom.xml
@@ -1,7 +1,7 @@
 <!--
   ============LICENSE_START=======================================================
    Copyright (C) 2018 Ericsson. All rights reserved.
-   Modifications Copyright (C) 2019 Nordix Foundation.
+   Modifications Copyright (C) 2019-2020 Nordix Foundation.
   ================================================================================
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
@@ -18,7 +18,9 @@
   SPDX-License-Identifier: Apache-2.0
   ============LICENSE_END=========================================================
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
@@ -48,6 +50,12 @@
             <artifactId>mockito-all</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+
     </dependencies>
 
     <profiles>
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParameters.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParameters.java
index 0b73a8793..39164e7c5 100644
--- a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParameters.java
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/main/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParameters.java
@@ -1,7 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
- *  Modifications Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,25 +21,10 @@
 
 package org.onap.policy.apex.plugins.event.carrier.restclient;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import java.util.regex.PatternSyntaxException;
-
-import javax.ws.rs.core.MultivaluedHashMap;
-import javax.ws.rs.core.MultivaluedMap;
-
 import lombok.Getter;
 import lombok.Setter;
-import org.apache.commons.lang3.StringUtils;
+
 import org.onap.policy.apex.service.parameters.carriertechnology.RestPluginCarrierTechnologyParameters;
-import org.onap.policy.common.parameters.GroupValidationResult;
-import org.onap.policy.common.parameters.ValidationStatus;
-import org.onap.policy.common.utils.validation.ParameterValidationUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 // @formatter:off
 /**
@@ -63,22 +48,16 @@ import org.slf4j.LoggerFactory;
 @Setter
 @Getter
 public class RestClientCarrierTechnologyParameters extends RestPluginCarrierTechnologyParameters {
-    // Get a reference to the logger
-    private static final Logger LOGGER = LoggerFactory.getLogger(RestClientCarrierTechnologyParameters.class);
+
     /**
      * Constructor to create a REST carrier technology parameters instance and register the instance with the parameter
      * service.
      */
     public RestClientCarrierTechnologyParameters() {
         super();
-        CARRIER_TECHNOLOGY_LABEL = "RESTCLIENT";
-        EVENT_PRODUCER_PLUGIN_CLASS = ApexRestClientProducer.class.getName();
-        EVENT_CONSUMER_PLUGIN_CLASS = ApexRestClientConsumer.class.getName();
-        // Set the carrier technology properties for the web socket carrier technology
-        this.setLabel(CARRIER_TECHNOLOGY_LABEL);
-        this.setEventProducerPluginClass(EVENT_PRODUCER_PLUGIN_CLASS);
-        this.setEventConsumerPluginClass(EVENT_CONSUMER_PLUGIN_CLASS);
-    }
-
 
+        this.setLabel("RESTCLIENT");
+        this.setEventProducerPluginClass(ApexRestClientProducer.class.getName());
+        this.setEventConsumerPluginClass(ApexRestClientConsumer.class.getName());
+    }
 }
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
index 0e4ddd0a3..df3b61bcb 100644
--- a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
@@ -1,7 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2018 Ericsson. All rights reserved.
- *  Modifications Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@
 
 package org.onap.policy.apex.plugins.event.carrier.restclient;
 
+import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -35,7 +36,7 @@ import org.onap.policy.apex.service.parameters.ApexParameters;
 import org.onap.policy.common.parameters.ParameterException;
 
 /**
- * Test REST Requestor carrier technology parameters.
+ * Test REST client carrier technology parameters.
  */
 public class RestClientCarrierTechnologyParametersTest {
 
@@ -92,16 +93,11 @@ public class RestClientCarrierTechnologyParametersTest {
         arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPFilterInvalid.json");
         arguments.setRelativeFileRoot(".");
 
-        try {
-            new ApexParameterHandler().getParameters(arguments);
+        assertThatCode(() -> {
             ApexParameters parameters = new ApexParameterHandler().getParameters(arguments);
-
             parameters.getEventInputParameters().get("RestClientConsumer0").getCarrierTechnologyParameters();
-            fail("test should throw an exception here");
-        } catch (ParameterException pe) {
-            assertTrue(pe.getMessage().contains(
-                    "Invalid HTTP code filter, the filter must be specified as a three digit regular expression: "));
-        }
+        }).hasMessageContaining(
+                "Invalid HTTP code filter, the filter must be specified as a three digit regular expression: ");
     }
 
     @Test