Fix occurences not deserialized properly

add json deserializer for RequirementDefinition

Issue-Id : SDC-474
Change-Id: I734a671b02a319fc3e90239bb8b0202c898fe473
Signed-off-by: vempo <vitaliy.emporopulo@amdocs.com>
(cherry picked from commit 30e46525c1406fb3b10603606c4efcc033ee58c4)

2 files changed, 99 insertions, 3 deletions

diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/deserializers/RequirementDefinitionDeserializer.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/deserializers/RequirementDefinitionDeserializer.java
new file mode 100644
index 0000000000..b341a52c56
--- /dev/null
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/deserializers/RequirementDefinitionDeserializer.java
@@ -0,0 +1,87 @@
+package org.openecomp.core.utilities.deserializers;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
+import org.openecomp.sdc.tosca.datatypes.model.RequirementDefinition;
+
+import java.lang.reflect.Type;
+import java.util.Objects;
+import java.util.Optional;
+
+public class RequirementDefinitionDeserializer implements JsonDeserializer<RequirementDefinition> {
+
+  private static final String CAPABILITY = "capability";
+  private static final String NODE = "node";
+  private static final String RELATIONSHIP = "relationship";
+  private static final String OCCURRENCES = "occurrences";
+
+  @Override
+  public RequirementDefinition deserialize(JsonElement jsonElement, Type type,
+                                           JsonDeserializationContext jsonDeserializationContext)
+      throws JsonParseException {
+
+    JsonObject jsonObject = jsonElement.getAsJsonObject();
+
+    RequirementDefinition requirementDefinition = new RequirementDefinition();
+    setRequirementValues(jsonObject, requirementDefinition);
+
+    Optional<Object[]> occurrences = handleOccurrences(jsonObject);
+    occurrences.ifPresent(requirementDefinition::setOccurrences);
+
+    return requirementDefinition;
+  }
+
+
+  private void setRequirementValues(JsonObject jsonObject,
+                                    RequirementDefinition requirementDefinition) {
+
+    JsonElement capabilityElement = jsonObject.get(CAPABILITY);
+    if (!Objects.isNull(capabilityElement)) {
+      requirementDefinition.setCapability(capabilityElement.getAsString());
+    }
+
+    JsonElement nodeElement = jsonObject.get(NODE);
+    if (!Objects.isNull(nodeElement)) {
+      requirementDefinition.setNode(nodeElement.getAsString());
+    }
+
+    JsonElement relationshipElement = jsonObject.get(RELATIONSHIP);
+    if (!Objects.isNull(relationshipElement)) {
+      requirementDefinition.setRelationship(relationshipElement.getAsString());
+    }
+  }
+
+  private Optional<Object[]> handleOccurrences(JsonObject jsonObject) {
+
+    JsonElement occurrencesElement = jsonObject.get(OCCURRENCES);
+
+    if(Objects.isNull(occurrencesElement)){
+      return Optional.empty();
+    }
+
+    JsonArray occurrences = occurrencesElement.getAsJsonArray();
+    Object[] fixedOccurrences = new Object[occurrences.size()];
+
+    for (int i = 0; i < occurrences.size(); i++) {
+      JsonElement currElement = occurrences.get(i);
+
+      // values inside occurrences array can be either String or Integer
+      if (currElement.isJsonPrimitive()) {
+        JsonPrimitive jsonPrimitive = currElement.getAsJsonPrimitive();
+
+        if (jsonPrimitive.isNumber()) {
+          fixedOccurrences[i] = jsonPrimitive.getAsNumber().intValue();
+        } else {
+          fixedOccurrences[i] = jsonPrimitive.getAsString();
+        }
+      }
+    }
+
+    return Optional.of(fixedOccurrences);
+  }
+}
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/json/JsonUtil.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/json/JsonUtil.java
index 8454bc61a8..c3d32df447 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/json/JsonUtil.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/json/JsonUtil.java
@@ -32,8 +32,10 @@ import org.everit.json.schema.ValidationException;
 import org.everit.json.schema.loader.SchemaLoader;
 import org.json.JSONObject;
 import org.openecomp.core.utilities.CommonMethods;
+import org.openecomp.core.utilities.deserializers.RequirementDefinitionDeserializer;
 import org.openecomp.sdc.logging.api.Logger;
 import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.openecomp.sdc.tosca.datatypes.model.RequirementDefinition;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -51,6 +53,15 @@ import java.util.stream.Collectors;
  */
 public class JsonUtil {
   private static final Logger logger = LoggerFactory.getLogger(JsonUtil.class);
+  private static final GsonBuilder gsonBuilder;
+  private static final Gson gson;
+
+  static {
+    gsonBuilder = new GsonBuilder();
+    gsonBuilder.registerTypeAdapter(RequirementDefinition.class, new
+        RequirementDefinitionDeserializer());
+    gson = gsonBuilder.create();
+  }
 
   /**
    * Object 2 json string.
@@ -86,9 +97,7 @@ public class JsonUtil {
     T typ;
     try {
       try (Reader br = new StringReader(json)) {
-        typ = new Gson().fromJson(br, classOfT);
-      } catch (IOException exception) {
-        throw exception;
+        typ = gson.fromJson(br, classOfT);
       }
     } catch (JsonIOException | JsonSyntaxException | IOException exception) {
       throw new RuntimeException(exception);