Fix sonar issues - Common Methods

Junit and Logger removed

Change-Id: Ic1a987600a8a5ab8c236be242f0f0cd12faf9624
Issue-ID: SDC-343
Signed-off-by: siddharth0905 <siddharth.singh4@amdocs.com>

2 files changed, 50 insertions, 36 deletions

diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/CommonMethods.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/CommonMethods.java
index 81a82c6298..5a17f887d9 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/CommonMethods.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/CommonMethods.java
@@ -1,21 +1,17 @@
-/*-
- * ============LICENSE_START=======================================================
- * SDC
- * ================================================================================
- * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
- * ================================================================================
+/*
+ * Copyright © 2016-2017 European Support Limited
+ *
  * 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.
  * See the License for the specific language governing permissions and
  * limitations under the License.
- * ============LICENSE_END=========================================================
  */
 
 package org.openecomp.core.utilities;
@@ -140,7 +136,7 @@ public class CommonMethods {
    * @return <tt>true</tt> - if the Object is null, <tt>false</tt> otherwise.
    */
   public static boolean isEmpty(byte[] byteArray) {
-    return (byteArray == null || byteArray.length == 0);
+    return byteArray == null || byteArray.length == 0;
   }
 
   /**
@@ -232,9 +228,10 @@ public class CommonMethods {
   }
 
   private static void long2string(long lng, StringBuilder buff) {
+    long value = lng;
     for (int i = 0; i < 16; i++) {
-      long nextByte = lng & 0xF000000000000000L;
-      lng <<= 4;
+      long nextByte = value & 0xF000000000000000L;
+      value <<= 4;
       boolean isNegative = nextByte < 0;
       nextByte = rightShift(nextByte, 60);
 
@@ -265,7 +262,7 @@ public class CommonMethods {
    */
   @SuppressWarnings("unchecked")
   public static <T> T[] concat(T[] left, T[] right) {
-    T[] res = null;
+    T[] res;
 
     if (isEmpty(left)) {
       res = right;
@@ -365,9 +362,7 @@ public class CommonMethods {
   public static <T> T newInstance(Class<T> cls) {
     try {
       return cls.newInstance();
-    } catch (InstantiationException exception) {
-      throw new RuntimeException(exception);
-    } catch (IllegalAccessException exception) {
+    } catch (InstantiationException | IllegalAccessException exception) {
       throw new RuntimeException(exception);
     }
   }
@@ -380,10 +375,8 @@ public class CommonMethods {
    */
   public static String getResourcesPath(String resourceName) {
     URL resourceUrl = CommonMethods.class.getClassLoader().getResource(resourceName);
-    String resourcePath = resourceUrl.getPath();
-    String dirPath = resourcePath.substring(0, resourcePath.lastIndexOf("/") + 1);
-
-    return dirPath;
+    return resourceUrl != null ? resourceUrl.getPath()
+        .substring(0, resourceUrl.getPath().lastIndexOf("/") + 1) : null;
   }
 
   /**
@@ -407,21 +400,13 @@ public class CommonMethods {
    * @return the string
    */
   public static String printStackTrace() {
-
-    StringWriter sw = new StringWriter();
+    StringBuilder sb = new StringBuilder();
     StackTraceElement[] trace = Thread.currentThread().getStackTrace();
     for (StackTraceElement traceElement : trace) {
-      sw.write("\t  " + traceElement);
-      sw.write(System.lineSeparator());
+      sb.append("\t  ").append(traceElement);
+      sb.append(System.lineSeparator());
     }
-    String str = sw.toString();
-    try {
-      sw.close();
-    } catch (IOException exception) {
-      System.err.println(exception);
-    }
-    return str;
-
+    return sb.toString();
   }
 
   /**
@@ -461,7 +446,7 @@ public class CommonMethods {
    */
   public static String collectionToCommaSeparatedString(Collection<String> elementCollection) {
     List<String> list = new ArrayList<>();
-    elementCollection.stream().forEach(element -> list.add(element));
+    list.addAll(elementCollection);
     return listToSeparatedString(list, ',');
   }
 
@@ -509,7 +494,6 @@ public class CommonMethods {
    */
   public static String duplicateStringWithDelimiter(String arg, char separator,
                                                     int numberOfDuplications) {
-    String res = null;
     StringBuilder sb = new StringBuilder();
 
     for (int i = 0; i < numberOfDuplications; i++) {
@@ -518,8 +502,7 @@ public class CommonMethods {
       }
       sb.append(arg);
     }
-    res = sb.toString();
-    return res;
+    return sb.toString();
   }
 
   /**
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/CommonMethodsTest.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/CommonMethodsTest.java
new file mode 100644
index 0000000000..c675f8927f
--- /dev/null
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/CommonMethodsTest.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2016-2017 European Support Limited
+ *
+ * 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.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openecomp.core.utilities;
+
+import org.testng.annotations.Test;
+
+import static org.testng.Assert.assertTrue;
+
+public class CommonMethodsTest {
+  @Test
+  public void testPrintStackTrace() throws Exception {
+    assertTrue(CommonMethods.printStackTrace().contains("org.openecomp.core.utilities" +
+        ".CommonMethods.printStackTrace(CommonMethods.java:"));
+    assertTrue(CommonMethods.printStackTrace().contains("org.openecomp.core.utilities" +
+        ".CommonMethodsTest.testPrintStackTrace(CommonMethodsTest.java"));
+  }
+}