Fix sonar violations

Issue-ID: AAI-1190

Change-Id: I72894665b288416069d3c2eb84185fcc303976f7
Signed-off-by: Sotiropoulos, Ioannis (is948x) <Ioannis.Sotiropoulos@amdocs.com>

7 files changed, 32 insertions, 27 deletions

diff --git a/src/main/java/org/onap/crud/dao/GraphDao.java b/src/main/java/org/onap/crud/dao/GraphDao.java
index fe638ce..6c1bca9 100644
--- a/src/main/java/org/onap/crud/dao/GraphDao.java
+++ b/src/main/java/org/onap/crud/dao/GraphDao.java
@@ -20,9 +20,9 @@
  */
 package org.onap.crud.dao;
 
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import org.onap.aai.restclient.client.OperationResult;
 import org.onap.crud.entity.Edge;
 import org.onap.crud.entity.Vertex;
@@ -73,7 +73,7 @@ public interface GraphDao {
    * @return - The {@link OperationResult} OperationResult
    * @throws CrudException
    */
-  public OperationResult getVertices(String type, Map<String, Object> filter, HashSet<String> properties, String version) throws CrudException;
+  public OperationResult getVertices(String type, Map<String, Object> filter, Set<String> properties, String version) throws CrudException;
 
   /**
    * Retrieve an {@link Edge} from the graph database by specifying its unique
diff --git a/src/main/java/org/onap/crud/dao/champ/ChampDao.java b/src/main/java/org/onap/crud/dao/champ/ChampDao.java
index 6817ea6..fd5de57 100644
--- a/src/main/java/org/onap/crud/dao/champ/ChampDao.java
+++ b/src/main/java/org/onap/crud/dao/champ/ChampDao.java
@@ -27,6 +27,7 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import org.apache.http.NameValuePair;
@@ -168,7 +169,7 @@ public class ChampDao implements GraphDao {
   }
 
   @Override
-  public OperationResult getVertices(String type, Map<String, Object> filter, HashSet<String> properties, String version) throws CrudException {
+  public OperationResult getVertices(String type, Map<String, Object> filter, Set<String> properties, String version) throws CrudException {
     filter.put(org.onap.schema.validation.OxmModelValidator.Metadata.NODE_TYPE.propertyName(), type);
 
     List<NameValuePair> queryParams = convertToNameValuePair(filter);
@@ -575,7 +576,7 @@ public class ChampDao implements GraphDao {
   }
 
   // https://stackoverflow.com/questions/26942330/convert-mapstring-string-to-listnamevaluepair-is-this-the-most-efficient
-  private List<NameValuePair> convertToNameValuePair(String k, HashSet<String> values) {
+  private List<NameValuePair> convertToNameValuePair(String k, Set<String> values) {
     List<NameValuePair> nvpList = new ArrayList<>(values.size());
 
     values.forEach((v) -> nvpList.add(new BasicNameValuePair(k, v)));
diff --git a/src/main/java/org/onap/crud/service/AbstractGraphDataService.java b/src/main/java/org/onap/crud/service/AbstractGraphDataService.java
index fed12fd..a5b52bd 100644
--- a/src/main/java/org/onap/crud/service/AbstractGraphDataService.java
+++ b/src/main/java/org/onap/crud/service/AbstractGraphDataService.java
@@ -22,9 +22,9 @@ package org.onap.crud.service;
 
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import javax.ws.rs.core.EntityTag;
 import javax.ws.rs.core.HttpHeaders;
 import javax.ws.rs.core.Response.Status;
@@ -89,7 +89,7 @@ public abstract class AbstractGraphDataService {
         version));
   }
 
-  public ImmutablePair<EntityTag, String> getVertices(String version, String type, Map<String, String> filter, HashSet<String> properties) throws CrudException {
+  public ImmutablePair<EntityTag, String> getVertices(String version, String type, Map<String, String> filter, Set<String> properties) throws CrudException {
     type = OxmModelValidator.resolveCollectionType(version, type);
     OperationResult operationResult = daoForGet.getVertices(type, OxmModelValidator.resolveCollectionfilter(version, type, filter), properties, version);
     List<Vertex> vertices = Vertex.collectionFromJson(operationResult.getResult(), version);
diff --git a/src/main/java/org/onap/crud/service/CrudAsyncGraphDataService.java b/src/main/java/org/onap/crud/service/CrudAsyncGraphDataService.java
index 26f7427..aa70a66 100644
--- a/src/main/java/org/onap/crud/service/CrudAsyncGraphDataService.java
+++ b/src/main/java/org/onap/crud/service/CrudAsyncGraphDataService.java
@@ -230,7 +230,7 @@ public class CrudAsyncGraphDataService extends AbstractGraphDataService {
         }
         String responsePayload = responseHandler.handleVertexResponse(version, event, response);
 
-        return new ImmutablePair<EntityTag, String>(entityTag, responsePayload);
+        return new ImmutablePair<>(entityTag, responsePayload);
     }
 
     @Override
@@ -252,7 +252,7 @@ public class CrudAsyncGraphDataService extends AbstractGraphDataService {
         }
         String responsePayload = responseHandler.handleEdgeResponse(version, event, response);
 
-        return new ImmutablePair<EntityTag, String>(entityTag, responsePayload);
+        return new ImmutablePair<>(entityTag, responsePayload);
     }
 
     @Override
@@ -272,7 +272,7 @@ public class CrudAsyncGraphDataService extends AbstractGraphDataService {
         }
         String responsePayload = responseHandler.handleVertexResponse(version, event, response);
 
-        return new ImmutablePair<EntityTag, String>(entityTag, responsePayload);
+        return new ImmutablePair<>(entityTag, responsePayload);
     }
 
     @Override
@@ -296,7 +296,7 @@ public class CrudAsyncGraphDataService extends AbstractGraphDataService {
         }
         String responsePayload = responseHandler.handleVertexResponse(version, event, response);
 
-        return new ImmutablePair<EntityTag, String>(entityTag, responsePayload);
+        return new ImmutablePair<>(entityTag, responsePayload);
     }
 
     @Override
@@ -339,7 +339,7 @@ public class CrudAsyncGraphDataService extends AbstractGraphDataService {
         }
         String responsePayload = responseHandler.handleEdgeResponse(version, event, response);
 
-        return new ImmutablePair<EntityTag, String>(entityTag, responsePayload);
+        return new ImmutablePair<>(entityTag, responsePayload);
     }
 
     @Override
@@ -361,7 +361,7 @@ public class CrudAsyncGraphDataService extends AbstractGraphDataService {
         }
         String responsePayload = responseHandler.handleEdgeResponse(version, event, response);
 
-        return new ImmutablePair<EntityTag, String>(entityTag, responsePayload);
+        return new ImmutablePair<>(entityTag, responsePayload);
     }
 
     @PreDestroy
diff --git a/src/main/java/org/onap/crud/service/CrudGraphDataService.java b/src/main/java/org/onap/crud/service/CrudGraphDataService.java
index 2888ace..9ff48c7 100644
--- a/src/main/java/org/onap/crud/service/CrudGraphDataService.java
+++ b/src/main/java/org/onap/crud/service/CrudGraphDataService.java
@@ -68,7 +68,7 @@ public class CrudGraphDataService extends AbstractGraphDataService {
     String payload = CrudResponseBuilder
         .buildUpsertVertexResponse(OxmModelValidator.validateOutgoingPayload(version, addedVertex), version);
 
-    return new ImmutablePair<EntityTag, String>(entityTag, payload);
+    return new ImmutablePair<>(entityTag, payload);
   }
 
   @Override
@@ -95,7 +95,7 @@ public class CrudGraphDataService extends AbstractGraphDataService {
     String payload = CrudResponseBuilder
       .buildUpsertEdgeResponse(RelationshipSchemaValidator.validateOutgoingPayload(version, addedEdge), version);
 
-    return new ImmutablePair<EntityTag, String>(entityTag, payload);
+    return new ImmutablePair<>(entityTag, payload);
   }
 
   @Override
@@ -110,7 +110,7 @@ public class CrudGraphDataService extends AbstractGraphDataService {
     String payload = getUpdatedVertexPayload(version, updatedVertexResult);
     EntityTag entityTag = CrudServiceUtil.getETagFromHeader(updatedVertexResult.getHeaders());
 
-    return new ImmutablePair<EntityTag, String>(entityTag, payload);
+    return new ImmutablePair<>(entityTag, payload);
   }
 
   private String getUpdatedVertexPayload(String version, OperationResult updatedVertexResult) throws CrudException {
@@ -169,7 +169,7 @@ public class CrudGraphDataService extends AbstractGraphDataService {
     String payload = getUpdatedEdgePayload(version, updatedEdgeResult);
     EntityTag entityTag = CrudServiceUtil.getETagFromHeader(updatedEdgeResult.getHeaders());
 
-    return new ImmutablePair<EntityTag, String>(entityTag, payload);
+    return new ImmutablePair<>(entityTag, payload);
   }
 
   private String getUpdatedEdgePayload(String version, OperationResult updatedEdgeResult) throws CrudException {
diff --git a/src/main/java/org/onap/crud/util/HashGenerator.java b/src/main/java/org/onap/crud/util/HashGenerator.java
index 02558fa..24f1823 100644
--- a/src/main/java/org/onap/crud/util/HashGenerator.java
+++ b/src/main/java/org/onap/crud/util/HashGenerator.java
@@ -26,6 +26,7 @@ import java.io.ObjectOutput;
 import java.io.ObjectOutputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+
 /**
  * Generates a sha 256 hash
  */
@@ -38,8 +39,9 @@ public class HashGenerator {
     }
 
     /**
-     * Generates a SHA 256 hash as a hexadecimal string for the inputs.
-     * Calls toString on the input objects to convert into a byte stream.
+     * Generates a SHA 256 hash as a hexadecimal string for the inputs. Calls toString on the input
+     * objects to convert into a byte stream.
+     * 
      * @param values
      * @return SHA 256 hash of the inputs as a hexadecimal string.
      * @throws IOException
@@ -48,13 +50,14 @@ public class HashGenerator {
         byte[] bytes = convertToBytes(values);
         byte[] digest = messageDigest.digest(bytes);
         StringBuilder result = new StringBuilder();
-        for (byte byt : digest) result.append(Integer.toString((byt & 0xff) + 0x100, 16).substring(1));
+        for (byte byt : digest) {
+            result.append(Integer.toString((byt & 0xff) + 0x100, 16).substring(1));
+        }
         return result.toString();
     }
 
     private byte[] convertToBytes(Object... values) throws IOException {
-        try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
-             ObjectOutput out = new ObjectOutputStream(bos)) {
+        try (ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutput out = new ObjectOutputStream(bos)) {
             for (Object object : values) {
                 out.writeObject(object.toString());
             }
@@ -62,4 +65,4 @@ public class HashGenerator {
         }
     }
 
-}
\ No newline at end of file
+}
diff --git a/src/main/java/org/onap/schema/validation/OxmModelValidator.java b/src/main/java/org/onap/schema/validation/OxmModelValidator.java
index 89b8030..d317678 100644
--- a/src/main/java/org/onap/schema/validation/OxmModelValidator.java
+++ b/src/main/java/org/onap/schema/validation/OxmModelValidator.java
@@ -43,7 +43,8 @@ import com.google.gson.JsonNull;
 
 public class OxmModelValidator {
   private static Logger logger = LoggerFactory.getInstance().getLogger(OxmModelValidator.class.getName());
-
+  private static final String OXM_LOAD_ERROR = "Error loading oxm model";
+  
   public enum Metadata {
     NODE_TYPE("aai-node-type"),
     URI("aai-uri"),
@@ -84,8 +85,8 @@ public class OxmModelValidator {
 
     Map<String, Object> result = new HashMap<String, Object>();
     if (jaxbContext == null) {
-      logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, "Error loading oxm model: " + version);
-      throw new CrudException("Error loading oxm model: " + version, Status.NOT_FOUND);
+      logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, OXM_LOAD_ERROR + ": " + version);
+      throw new CrudException(OXM_LOAD_ERROR + ": " + version, Status.NOT_FOUND);
     }
     final DynamicType modelObjectType = jaxbContext.getDynamicType(
         CaseFormat.LOWER_CAMEL.to(CaseFormat.UPPER_CAMEL, CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_CAMEL, type)));
@@ -131,8 +132,8 @@ public class OxmModelValidator {
     }
 
     if (jaxbContext == null) {
-      logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, "Error loading oxm model: " + version);
-      throw new CrudException("Error loading oxm model: " + version, Status.NOT_FOUND);
+      logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, OXM_LOAD_ERROR + ": " + version);
+      throw new CrudException(OXM_LOAD_ERROR + ": " + version, Status.NOT_FOUND);
     }
     // Determine if the Object part is a collection type in the model
     // definition