Support models extending models

Signed-off-by: MichaelMorris <michael.morris@est.tech>
Issue-ID: SDC-3668
Change-Id: Iad4d2a28c1c982e55e8835d4f30a9a212aefb6be

3 files changed, 59 insertions, 4 deletions

diff --git a/catalog-model/src/main/java/org/openecomp/sdc/be/model/Model.java b/catalog-model/src/main/java/org/openecomp/sdc/be/model/Model.java
index 99d0f6599e..9c07c0565c 100644
--- a/catalog-model/src/main/java/org/openecomp/sdc/be/model/Model.java
+++ b/catalog-model/src/main/java/org/openecomp/sdc/be/model/Model.java
@@ -30,5 +30,10 @@ import lombok.NoArgsConstructor;
 public class Model {
 
     private String name;
+    private String derivedFrom;
+    
+    public Model(final String name) {
+    	this.name = name;
+    }
 
 }
diff --git a/catalog-model/src/main/java/org/openecomp/sdc/be/model/operations/impl/ModelOperation.java b/catalog-model/src/main/java/org/openecomp/sdc/be/model/operations/impl/ModelOperation.java
index ddc0367a44..d4bd7996f2 100644
--- a/catalog-model/src/main/java/org/openecomp/sdc/be/model/operations/impl/ModelOperation.java
+++ b/catalog-model/src/main/java/org/openecomp/sdc/be/model/operations/impl/ModelOperation.java
@@ -19,6 +19,7 @@
 package org.openecomp.sdc.be.model.operations.impl;
 
 import fj.data.Either;
+
 import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.EnumMap;
@@ -29,17 +30,24 @@ import java.util.Optional;
 import java.util.stream.Collectors;
 import org.apache.commons.collections.MapUtils;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.tuple.ImmutablePair;
 import org.openecomp.sdc.be.dao.api.ActionStatus;
 import org.openecomp.sdc.be.dao.cassandra.ToscaModelImportCassandraDao;
+import org.openecomp.sdc.be.dao.graph.datatype.GraphEdge;
+import org.openecomp.sdc.be.dao.graph.datatype.GraphRelation;
 import org.openecomp.sdc.be.dao.janusgraph.JanusGraphGenericDao;
 import org.openecomp.sdc.be.dao.janusgraph.JanusGraphOperationStatus;
 import org.openecomp.sdc.be.dao.jsongraph.GraphVertex;
 import org.openecomp.sdc.be.dao.jsongraph.JanusGraphDao;
 import org.openecomp.sdc.be.dao.jsongraph.types.VertexTypeEnum;
+import org.openecomp.sdc.be.dao.neo4j.GraphEdgeLabels;
 import org.openecomp.sdc.be.data.model.ToscaImportByModel;
 import org.openecomp.sdc.be.datatypes.enums.GraphPropertyEnum;
+import org.openecomp.sdc.be.datatypes.enums.NodeTypeEnum;
 import org.openecomp.sdc.be.model.Model;
 import org.openecomp.sdc.be.model.jsonjanusgraph.operations.exception.OperationException;
+import org.openecomp.sdc.be.model.operations.api.DerivedFromOperation;
+import org.openecomp.sdc.be.model.operations.api.StorageOperationStatus;
 import org.openecomp.sdc.be.model.jsonjanusgraph.operations.exception.ModelOperationExceptionSupplier;
 import org.openecomp.sdc.be.resources.data.ModelData;
 import org.openecomp.sdc.common.log.enums.EcompLoggerErrorCode;
@@ -55,14 +63,17 @@ public class ModelOperation {
     private final JanusGraphGenericDao janusGraphGenericDao;
     private final JanusGraphDao janusGraphDao;
     private final ToscaModelImportCassandraDao toscaModelImportCassandraDao;
+    private final DerivedFromOperation derivedFromOperation;
 
     @Autowired
     public ModelOperation(final JanusGraphGenericDao janusGraphGenericDao,
                           final JanusGraphDao janusGraphDao,
-                          final ToscaModelImportCassandraDao toscaModelImportCassandraDao) {
+                          final ToscaModelImportCassandraDao toscaModelImportCassandraDao,
+                          final DerivedFromOperation derivedFromOperation) {
         this.janusGraphGenericDao = janusGraphGenericDao;
         this.janusGraphDao = janusGraphDao;
         this.toscaModelImportCassandraDao = toscaModelImportCassandraDao;
+        this.derivedFromOperation = derivedFromOperation;
     }
 
     public Model createModel(final Model model, final boolean inTransaction) {
@@ -80,7 +91,8 @@ public class ModelOperation {
                 throw new OperationException(ActionStatus.GENERAL_ERROR,
                     String.format("Failed to create model %s on JanusGraph with %s error", model, janusGraphOperationStatus));
             }
-            result = new Model(createNode.left().value().getName());
+            addDerivedFromRelation(model);
+            result = new Model(createNode.left().value().getName(), model.getDerivedFrom());
             return result;
         } finally {
             if (!inTransaction) {
@@ -92,6 +104,24 @@ public class ModelOperation {
             }
         }
     }
+    
+    private void addDerivedFromRelation(final Model model) {
+        final String derivedFrom = model.getDerivedFrom();
+        if (derivedFrom == null) {
+            return;
+        }
+        log.debug("Adding derived from relation between model {} to its parent {}",
+                model.getName(), derivedFrom);
+        final Optional<Model> derivedFromModelOptional = this.findModelByName(derivedFrom);
+        if (derivedFromModelOptional.isPresent()) {
+            final Either<GraphRelation, StorageOperationStatus> result = derivedFromOperation.addDerivedFromRelation(UniqueIdBuilder.buildModelUid(model.getName()), 
+                    UniqueIdBuilder.buildModelUid(derivedFromModelOptional.get().getName()), NodeTypeEnum.Model);
+            if(result.isRight()) {
+                throw new OperationException(ActionStatus.GENERAL_ERROR,
+                    String.format("Failed to create relationship from model % to derived from model %s on JanusGraph with %s error", model, derivedFrom, result.right().value()));
+            }
+        }
+    }
 
     public Optional<GraphVertex> findModelVertexByName(final String name) {
         if (StringUtils.isEmpty(name)) {
@@ -171,7 +201,24 @@ public class ModelOperation {
     }
 
     private Model convertToModel(final GraphVertex modelGraphVertex) {
-        return new Model((String) modelGraphVertex.getMetadataProperty(GraphPropertyEnum.NAME));
+        final String modelName = (String) modelGraphVertex.getMetadataProperty(GraphPropertyEnum.NAME);
+
+        final Either<ImmutablePair<ModelData, GraphEdge>, JanusGraphOperationStatus> parentNode =
+                        janusGraphGenericDao.getChild(UniqueIdBuilder.getKeyByNodeType(NodeTypeEnum.Model), UniqueIdBuilder.buildModelUid(modelName),
+                                        GraphEdgeLabels.DERIVED_FROM, NodeTypeEnum.Model, ModelData.class);
+        log.debug("After retrieving DERIVED_FROM node of {}. status is {}", modelName, parentNode);
+        if (parentNode.isRight()) {
+            final JanusGraphOperationStatus janusGraphOperationStatus = parentNode.right().value();
+            if (janusGraphOperationStatus != JanusGraphOperationStatus.NOT_FOUND) {
+                final var operationException = ModelOperationExceptionSupplier.failedToRetrieveModels(janusGraphOperationStatus).get();
+                log.error(EcompLoggerErrorCode.DATA_ERROR, this.getClass().getName(), operationException.getMessage());
+                throw operationException;
+            }
+            return new Model((String) modelGraphVertex.getMetadataProperty(GraphPropertyEnum.NAME));
+        } else {
+            final ModelData parentModel = parentNode.left().value().getKey();
+            return new Model((String) modelGraphVertex.getMetadataProperty(GraphPropertyEnum.NAME), parentModel.getName());
+        }
     }
 }
 
diff --git a/catalog-model/src/main/java/org/openecomp/sdc/be/ui/model/ModelCreateRequest.java b/catalog-model/src/main/java/org/openecomp/sdc/be/ui/model/ModelCreateRequest.java
index 0d294b42c4..685d95e4ab 100644
--- a/catalog-model/src/main/java/org/openecomp/sdc/be/ui/model/ModelCreateRequest.java
+++ b/catalog-model/src/main/java/org/openecomp/sdc/be/ui/model/ModelCreateRequest.java
@@ -20,17 +20,20 @@ package org.openecomp.sdc.be.ui.model;
 
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Size;
+import lombok.AllArgsConstructor;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 
 /**
  * This class is responsible for holding all required fields from the create Model post request.
  * It also validates the Model 'name' field.
  */
-@Data
+@Data @AllArgsConstructor @NoArgsConstructor
 public class ModelCreateRequest {
 
     @NotNull(message = "Model name cannot be null")
     @Size(min = 2, message = "Model name cannot be empty")
     private String name;
 
+    private String derivedFrom;
 }