Fix sonars in apex-pdp

Addressed the following issues:
- initialize mocks before use
- use parameterized queries
- Random() is not secure
- provide parameterized type for generics
- unused imports
- constructor visibility
- use compute() instead of containsKey()/put()
- make final fields static
- rename constants to all upper case
- no assert() in Thread.run() methods
- nested try
- nested if/else
- too many break/continue
- use try-with-resources
- repeatable annotations
- overlapping characters in reg ex
- hashcode is not sufficient in compareTo()
- need equals() with compareTo()
- make class an interface
- use parameterized test
- multiple calls in assert()
- log or re-throw
- use different type of lambda
- use parameterized logging
- use StringBuilder instead of concatenation
- use StandardCharsets.UTF_8

Issue-ID: POLICY-2906
Change-Id: I2cf8c885e3e22c2c6cbe6403a34906928afad022
Signed-off-by: Jim Hahn <jrh3@att.com>

3 files changed, 49 insertions, 69 deletions

diff --git a/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/java/classes/ClassUtils.java b/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/java/classes/ClassUtils.java
index aa3adf4d0..03bedce81 100644
--- a/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/java/classes/ClassUtils.java
+++ b/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/java/classes/ClassUtils.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2021 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.
@@ -24,6 +25,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.net.URL;
 import java.net.URLClassLoader;
@@ -91,33 +93,7 @@ public abstract class ClassUtils {
             URL[] urls = ((URLClassLoader) ClassLoader.getSystemClassLoader()).getURLs();
 
             // Try get the classes in the bootstrap loader
-            try {
-                final Class<?> nullclassloader = Class.forName("sun.misc.Launcher");
-                if (nullclassloader != null) {
-                    Method mmethod = nullclassloader.getMethod("getBootstrapClassPath");
-                    if (mmethod != null) {
-                        final Object cp = mmethod.invoke(null, (Object[]) null);
-                        if (cp != null) {
-                            mmethod = cp.getClass().getMethod("getURLs");
-                            if (mmethod != null) {
-                                final URL[] moreurls = (URL[]) (mmethod.invoke(cp, (Object[]) null));
-                                if (moreurls != null && moreurls.length > 0) {
-                                    if (urls.length == 0) {
-                                        urls = moreurls;
-                                    } else {
-                                        final URL[] result = Arrays.copyOf(urls, urls.length + moreurls.length);
-                                        System.arraycopy(moreurls, 0, result, urls.length, moreurls.length);
-                                        urls = result;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                    // end long way!
-                }
-            } catch (final ClassNotFoundException e) {
-                LOGGER.warn("Failed to find default path for JRE libraries", e);
-            }
+            urls = getClassesFromBootstrapLoader(urls);
 
             // Iterate over the class path entries
             for (final URL url : urls) {
@@ -141,6 +117,47 @@ public abstract class ClassUtils {
         return classNameSet;
     }
 
+    private static URL[] getClassesFromBootstrapLoader(URL[] urls)
+                    throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        try {
+            final Class<?> nullclassloader = Class.forName("sun.misc.Launcher");
+            if (nullclassloader == null) {
+                return urls;
+            }
+
+            Method mmethod = nullclassloader.getMethod("getBootstrapClassPath");
+            if (mmethod == null) {
+                return urls;
+            }
+
+            final Object cp = mmethod.invoke(null, (Object[]) null);
+            if (cp == null) {
+                return urls;
+            }
+
+            mmethod = cp.getClass().getMethod("getURLs");
+            if (mmethod == null) {
+                return urls;
+            }
+
+            final URL[] moreurls = (URL[]) (mmethod.invoke(cp, (Object[]) null));
+            if (moreurls == null || moreurls.length == 0) {
+                return urls;
+            }
+
+            if (urls.length == 0) {
+                return moreurls;
+            } else {
+                final URL[] result = Arrays.copyOf(urls, urls.length + moreurls.length);
+                System.arraycopy(moreurls, 0, result, urls.length, moreurls.length);
+                return result;
+            }
+        } catch (final ClassNotFoundException e) {
+            LOGGER.warn("Failed to find default path for JRE libraries", e);
+            return urls;
+        }
+    }
+
     /**
      * Find all classes in directories and JARs in those directories.
      *
diff --git a/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/impl/ws/RawMessageHandler.java b/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/impl/ws/RawMessageHandler.java
index acd7bdfea..0493eafb5 100644
--- a/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/impl/ws/RawMessageHandler.java
+++ b/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/impl/ws/RawMessageHandler.java
@@ -2,6 +2,7 @@
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
  *  Modifications Copyright (C) 2019-2020 Nordix Foundation.
+ *  Modifications Copyright (C) 2021 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.
@@ -158,29 +159,16 @@ public class RawMessageHandler<M> implements WebSocketMessageListener<M>, Runnab
                 while ((messageBlock = messageBlockQueue.poll(1, TimeUnit.MILLISECONDS)) != null) {
                     dataHandler.post(messageBlock);
                 }
-            } catch (final InterruptedException e) {
-                // restore the interrupt status
-                Thread.currentThread().interrupt();
-                LOGGER.debug(RAW_MESSAGE_LISTENING_INTERRUPTED);
-                break;
-            }
 
-            try {
                 // Read string messages from the queue and pass it to the data handler
                 String stringMessage = null;
                 while ((stringMessage = stringMessageQueue.poll(1, TimeUnit.MILLISECONDS)) != null) {
                     dataHandler.post(stringMessage);
                 }
-            } catch (final InterruptedException e) {
-                // restore the interrupt status
-                Thread.currentThread().interrupt();
-                LOGGER.debug(RAW_MESSAGE_LISTENING_INTERRUPTED);
-                break;
-            }
 
-            // Wait for new messages
-            try {
+                // Wait for new messages
                 Thread.sleep(QUEUE_POLL_TIMEOUT);
+
             } catch (final InterruptedException e) {
                 // restore the interrupt status
                 Thread.currentThread().interrupt();
diff --git a/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/util/MessagingUtils.java b/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/util/MessagingUtils.java
index 463e85f3e..bda1f870c 100644
--- a/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/util/MessagingUtils.java
+++ b/core/core-infrastructure/src/main/java/org/onap/policy/apex/core/infrastructure/messaging/util/MessagingUtils.java
@@ -2,6 +2,7 @@
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
  *  Modifications Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2021 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.
@@ -218,37 +219,11 @@ public final class MessagingUtils {
     public static byte[] serializeObject(final Object object) {
         LOGGER.entry(object.getClass().getName());
         final ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
-        ObjectOutputStream oos = null;
-        try {
-            oos = new ObjectOutputStream(bytesOut);
+        try (ObjectOutputStream oos = new ObjectOutputStream(bytesOut)) {
             oos.writeObject(object);
         } catch (final IOException e) {
             LOGGER.warn("error on object serialization", e);
-        } finally {
-            flushAndClose(oos, bytesOut);
         }
         return bytesOut.toByteArray();
     }
-
-    /**
-     * Flush and close an object stream and a byte array output stream.
-     *
-     * @param oos the object output stream
-     * @param bytesOut the byte array output stream
-     */
-    private static void flushAndClose(final ObjectOutputStream oos, final ByteArrayOutputStream bytesOut) {
-        try {
-            if (oos != null) {
-                oos.flush();
-                oos.close();
-            }
-            if (bytesOut != null) {
-                bytesOut.close();
-            }
-
-        } catch (final IOException e) {
-            LOGGER.error("Failed to close the Srialization operation");
-            LOGGER.catching(e);
-        }
-    }
 }