Add support for InstanceGroup resource models

Generate models for Instance Groups (for specific supported types).
Process groups with a metadata type of CR or Configuration.
Add InstanceGroup Widget to the supported Widgets.

Add support for a group filter properties resource/file (with the
single property key "AAI.instance-group-types" which provides a
comma-separated list of supported types).
Add the System Propery groupfilter.config to define the file path.

Change-Id: I6153e6284965c57ae43291b1dc3ee4a1d11e6583
Issue-ID: AAI-1579
Signed-off-by: mark.j.leonard <mark.j.leonard@gmail.com>

9 files changed, 254 insertions, 42 deletions

diff --git a/src/main/bin/start.sh b/src/main/bin/start.sh
index b91c396..c71acca 100644
--- a/src/main/bin/start.sh
+++ b/src/main/bin/start.sh
@@ -19,8 +19,7 @@
 # limitations under the License.
 # ============LICENSE_END=========================================================
 
-BASEDIR="/opt/app/babel"
-APP_HOME="${BASEDIR}"
+APP_HOME="${APP_HOME:-/opt/app/babel}"
 
 if [ -z "${CONFIG_HOME}" ]; then
 	echo "CONFIG_HOME must be set in order to start up process"
@@ -35,7 +34,8 @@ fi
 PROPS="-DAPP_HOME=${APP_HOME}"
 PROPS="${PROPS} -DCONFIG_HOME=${CONFIG_HOME}"
 PROPS="${PROPS} -Dartifactgenerator.config=${CONFIG_HOME}/artifact-generator.properties"
+PROPS="${PROPS} -Dgroupfilter.config=${CONFIG_HOME}/filter-types.properties"
 PROPS="${PROPS} -DKEY_STORE_PASSWORD=${KEY_STORE_PASSWORD}"
 JVM_MAX_HEAP=${MAX_HEAP:-1024}
 
-exec java -Xmx${JVM_MAX_HEAP}m ${PROPS} -jar ${APP_HOME}/babel.jar
\ No newline at end of file
+exec java -Xmx${JVM_MAX_HEAP}m ${PROPS} -jar ${APP_HOME}/babel.jar
diff --git a/src/main/java/org/onap/aai/babel/parser/ArtifactGeneratorToscaParser.java b/src/main/java/org/onap/aai/babel/parser/ArtifactGeneratorToscaParser.java
index 24e8199..b85ffab 100644
--- a/src/main/java/org/onap/aai/babel/parser/ArtifactGeneratorToscaParser.java
+++ b/src/main/java/org/onap/aai/babel/parser/ArtifactGeneratorToscaParser.java
@@ -24,6 +24,7 @@ package org.onap.aai.babel.parser;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
@@ -33,6 +34,7 @@ import org.onap.aai.babel.logging.ApplicationMsgs;
 import org.onap.aai.babel.logging.LogHelper;
 import org.onap.aai.babel.xml.generator.data.WidgetConfigurationUtil;
 import org.onap.aai.babel.xml.generator.model.AllotedResource;
+import org.onap.aai.babel.xml.generator.model.InstanceGroup;
 import org.onap.aai.babel.xml.generator.model.L3NetworkWidget;
 import org.onap.aai.babel.xml.generator.model.Model;
 import org.onap.aai.babel.xml.generator.model.ProvidingService;
@@ -54,11 +56,12 @@ public class ArtifactGeneratorToscaParser {
     private static Logger log = LogHelper.INSTANCE;
 
     public static final String PROPERTY_ARTIFACT_GENERATOR_CONFIG_FILE = "artifactgenerator.config";
+    public static final String PROPERTY_GROUP_FILTERS_CONFIG_FILE = "groupfilter.config";
 
     private static final String GENERATOR_AAI_CONFIGFILE_NOT_FOUND =
             "Cannot generate artifacts. Artifact Generator Configuration file not found at %s";
     private static final String GENERATOR_AAI_CONFIGLOCATION_NOT_FOUND =
-            "Cannot generate artifacts. artifactgenerator.config system property not configured";
+            "Cannot generate artifacts. System property %s not configured";
     private static final String GENERATOR_AAI_PROVIDING_SERVICE_METADATA_MISSING =
             "Cannot generate artifacts. Providing Service Metadata is missing for allotted resource %s";
     private static final String GENERATOR_AAI_PROVIDING_SERVICE_MISSING =
@@ -117,7 +120,31 @@ public class ArtifactGeneratorToscaParser {
                 throw new IllegalArgumentException(String.format(GENERATOR_AAI_CONFIGFILE_NOT_FOUND, configLocation));
             }
         } else {
-            throw new IllegalArgumentException(GENERATOR_AAI_CONFIGLOCATION_NOT_FOUND);
+            throw new IllegalArgumentException(
+                    String.format(GENERATOR_AAI_CONFIGLOCATION_NOT_FOUND, PROPERTY_ARTIFACT_GENERATOR_CONFIG_FILE));
+        }
+    }
+
+    /**
+     * Initialises the group filter configuration.
+     *
+     * @throws IOException
+     */
+    public static void initGroupFilterConfiguration() throws IOException {
+        log.debug("Getting Filter Tyoes Configuration");
+        String configLocation = System.getProperty(PROPERTY_GROUP_FILTERS_CONFIG_FILE);
+        if (configLocation != null) {
+            File file = new File(configLocation);
+            if (file.exists()) {
+                Properties properties = new Properties();
+                properties.load(new FileInputStream(file));
+                WidgetConfigurationUtil.setFilterConfig(properties);
+            } else {
+                throw new IllegalArgumentException(String.format(GENERATOR_AAI_CONFIGFILE_NOT_FOUND, configLocation));
+            }
+        } else {
+            throw new IllegalArgumentException(
+                    String.format(GENERATOR_AAI_CONFIGLOCATION_NOT_FOUND, PROPERTY_GROUP_FILTERS_CONFIG_FILE));
         }
     }
 
@@ -142,20 +169,20 @@ public class ArtifactGeneratorToscaParser {
         }
     }
 
-
     /**
      * Generates a Resource List using input Service Node Templates.
      *
      * @param serviceNodes input Service Node Templates
      * @param idTypeStore ID->Type mapping
+     *
      * @return the processed resource models
      */
     public List<Resource> processResourceToscas(List<NodeTemplate> serviceNodes, Map<String, String> idTypeStore) {
         List<Resource> resources = new LinkedList<>();
         for (NodeTemplate serviceNode : serviceNodes) {
             if (serviceNode.getMetaData() != null) {
-                List<NodeTemplate> resourceNodes = csarHelper.getNodeTemplateChildren(serviceNode);
-                processResourceTosca(idTypeStore, resources, serviceNode, resourceNodes);
+                resources.addAll(processResourceTosca(idTypeStore, serviceNode,
+                        csarHelper.getNodeTemplateChildren(serviceNode)));
             } else {
                 log.warn(ApplicationMsgs.MISSING_SERVICE_METADATA, serviceNode.getName());
             }
@@ -163,31 +190,96 @@ public class ArtifactGeneratorToscaParser {
         return resources;
     }
 
-    private void processResourceTosca(Map<String, String> idTypeStore, List<Resource> resources,
-            NodeTemplate serviceNode, List<NodeTemplate> resourceNodes) {
+    /**
+     * @param idTypeStore ID->Type mapping
+     * @param serviceNode
+     * @param resourceNodes
+     * @return the processed resource models
+     */
+    private List<Resource> processResourceTosca(Map<String, String> idTypeStore, NodeTemplate serviceNode,
+            List<NodeTemplate> resourceNodes) {
+        List<Resource> resources = new LinkedList<>();
         String resourceUuId = serviceNode.getMetaData().getValue("UUID");
-        String resourceType = idTypeStore.get(resourceUuId);
-        if (resourceType != null) {
-            Model model = Model.getModelFor(resourceType);
+        String nodeTypeName = idTypeStore.get(resourceUuId);
+        if (nodeTypeName != null) {
+            Model resourceModel = Model.getModelFor(nodeTypeName, serviceNode.getMetaData().getValue("type"));
 
-            log.debug("Inside Resource artifact generation for resource");
+            log.debug("Processing resource " + nodeTypeName + ": " + resourceUuId);
             Map<String, String> serviceMetadata = serviceNode.getMetaData().getAllProperties();
-            model.populateModelIdentificationInformation(serviceMetadata);
+            resourceModel.populateModelIdentificationInformation(serviceMetadata);
 
-            // Found model from the type store so removing the same
-            idTypeStore.remove(model.getModelNameVersionId());
-            processVfTosca(idTypeStore, model, resourceNodes);
+            idTypeStore.remove(resourceModel.getModelNameVersionId());
+            processVfTosca(idTypeStore, resourceModel, resourceNodes);
 
-            // Process group information from tosca for vfModules
             if (csarHelper.getServiceVfList() != null) {
-                processVfModules(resources, model, serviceNode);
+                processVfModules(resources, resourceModel, serviceNode);
             }
 
             if (hasSubCategoryTunnelXConnect(serviceMetadata) && hasAllottedResource(serviceMetadata)) {
-                model.addWidget(new TunnelXconnectWidget());
+                resourceModel.addWidget(new TunnelXconnectWidget());
+            }
+
+            resources.addAll(processInstanceGroups(resourceModel, serviceNode));
+            resources.add((Resource) resourceModel);
+        }
+        return resources;
+    }
+
+    /**
+     * Process groups for this service node, according to the defined filter.
+     *
+     * @param resourceModel
+     * @param serviceNode
+     * @return resources for which XML Models should be generated
+     */
+    private List<Resource> processInstanceGroups(Model resourceModel, NodeTemplate serviceNode) {
+        List<Resource> resources = new ArrayList<>();
+        if (csarHelper.getNodeTemplateByName(serviceNode.getName()).getSubMappingToscaTemplate() != null) {
+            List<Group> serviceGroups = csarHelper.getGroupsOfOriginOfNodeTemplate(serviceNode);
+            for (Group group : serviceGroups) {
+                if (WidgetConfigurationUtil.isSupportedInstanceGroup(group.getType())) {
+                    resources.addAll(processInstanceGroup(resourceModel, group));
+                }
+            }
+        }
+        return resources;
+    }
+
+    /**
+     * Create an Instance Group Model for the supplied Service Group and relate this to the supplied resource Model.
+     *
+     * @param resourceModel the Resource node template Model
+     * @param group the Service Group
+     * @return the Instance Group and Member resource models
+     */
+    private List<Resource> processInstanceGroup(Model resourceModel, Group group) {
+        List<Resource> resources = new ArrayList<>();
+
+        Resource groupModel = new InstanceGroup();
+        groupModel.populateModelIdentificationInformation(group.getMetadata().getAllProperties());
+        groupModel.populateModelIdentificationInformation(populateStringProperties(group.getProperties()));
+
+        resourceModel.addResource(groupModel);
+        resources.add(groupModel);
+
+        List<NodeTemplate> members = group.getMemberNodes();
+        if (members != null && !members.isEmpty()) {
+            for (NodeTemplate nodeTemplate : members) {
+                String nodeTypeName = normaliseNodeTypeName(nodeTemplate);
+                Model memberModel = Model.getModelFor(nodeTypeName, nodeTemplate.getMetaData().getValue("type"));
+                memberModel.populateModelIdentificationInformation(nodeTemplate.getMetaData().getAllProperties());
+                if (memberModel instanceof Resource) {
+                    log.debug("Generating grouped Resource " + nodeTypeName);
+                    groupModel.addResource((Resource) memberModel);
+                    resources.add((Resource) memberModel);
+                } else {
+                    log.debug("Generating grouped Widget " + nodeTypeName);
+                    groupModel.addWidget((Widget) memberModel);
+                }
             }
-            resources.add((Resource) model);
         }
+
+        return resources;
     }
 
     /**
@@ -200,7 +292,7 @@ public class ArtifactGeneratorToscaParser {
      */
     private void addNodeToService(Map<String, String> nodesById, Service service, NodeTemplate nodeTemplate) {
         String nodeTypeName = normaliseNodeTypeName(nodeTemplate);
-        Model model = Model.getModelFor(nodeTypeName);
+        Model model = Model.getModelFor(nodeTypeName, nodeTemplate.getMetaData().getValue("type"));
         if (model != null) {
             if (nodeTemplate.getMetaData() != null) {
                 model.populateModelIdentificationInformation(nodeTemplate.getMetaData().getAllProperties());
@@ -215,6 +307,13 @@ public class ArtifactGeneratorToscaParser {
         }
     }
 
+    /**
+     * Process TOSCA Group information for VF Modules.
+     *
+     * @param resources
+     * @param model
+     * @param serviceNode
+     */
     private void processVfModules(List<Resource> resources, Model resourceModel, NodeTemplate serviceNode) {
         // Get the customisation UUID for each VF node and use it to get its Groups
         String uuid = csarHelper.getNodeTemplateCustomizationUuid(serviceNode);
@@ -237,7 +336,11 @@ public class ArtifactGeneratorToscaParser {
         Map<String, Property> groupProperties = groupDefinition.getProperties();
         Map<String, String> properties = populateStringProperties(groupProperties);
         groupModel.populateModelIdentificationInformation(properties);
+        processVfModuleGroup(resources, model, groupDefinition, serviceNode, groupModel);
+    }
 
+    private void processVfModuleGroup(List<Resource> resources, Model model, Group groupDefinition,
+            NodeTemplate serviceNode, VfModule groupModel) {
         // Get names of the members of the service group
         List<NodeTemplate> members = csarHelper.getMembersOfVfModule(serviceNode, groupDefinition);
         if (members != null && !members.isEmpty()) {
@@ -306,13 +409,13 @@ public class ArtifactGeneratorToscaParser {
 
     private void processVfTosca(Map<String, String> idTypeStore, Model resourceModel,
             List<NodeTemplate> resourceNodes) {
-        boolean providingServiceFound = false;
+        boolean foundProvidingService = false;
 
         for (NodeTemplate resourceNodeTemplate : resourceNodes) {
             String nodeTypeName = normaliseNodeTypeName(resourceNodeTemplate);
             Model resourceNode = Model.getModelFor(nodeTypeName);
             if (resourceNode instanceof ProvidingService) {
-                providingServiceFound = true;
+                foundProvidingService = true;
                 Map<String, Property> nodeProperties = resourceNodeTemplate.getProperties();
                 if (nodeProperties.get("providing_service_uuid") == null
                         || nodeProperties.get("providing_service_invariant_uuid") == null) {
@@ -329,9 +432,10 @@ public class ArtifactGeneratorToscaParser {
             }
         }
 
-        if (resourceModel instanceof AllotedResource && !providingServiceFound) {
+        if (resourceModel instanceof AllotedResource && !foundProvidingService) {
             throw new IllegalArgumentException(
                     String.format(GENERATOR_AAI_PROVIDING_SERVICE_MISSING, resourceModel.getModelId()));
         }
     }
+
 }
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/api/AaiArtifactGenerator.java b/src/main/java/org/onap/aai/babel/xml/generator/api/AaiArtifactGenerator.java
index 79c7492..ca4cfa2 100644
--- a/src/main/java/org/onap/aai/babel/xml/generator/api/AaiArtifactGenerator.java
+++ b/src/main/java/org/onap/aai/babel/xml/generator/api/AaiArtifactGenerator.java
@@ -64,6 +64,7 @@ public class AaiArtifactGenerator implements ArtifactGenerator {
 
         try {
             ArtifactGeneratorToscaParser.initWidgetConfiguration();
+            ArtifactGeneratorToscaParser.initGroupFilterConfiguration();
             String serviceVersion = validateServiceVersion(additionalParams);
             GenerationData generationData = new GenerationData();
 
@@ -100,10 +101,10 @@ public class AaiArtifactGenerator implements ArtifactGenerator {
 
                 // Generate AAI XML resource model
                 for (Resource res : resources) {
+                    log.info(ApplicationMsgs.DISTRIBUTION_EVENT, "Generating resource model");
                     MDC.put(MDC_PARAM_MODEL_INFO, res.getModelName() + "," + getArtifactLabel(res));
                     String aaiResourceModel = modelGenerator.generateModelFor(res);
                     generationData.add(getResourceArtifact(res, aaiResourceModel));
-
                 }
             }
             return generationData;
@@ -237,8 +238,7 @@ public class AaiArtifactGenerator implements ArtifactGenerator {
         } else {
             String versionRegex = "^[1-9]\\d*(\\.0)$";
             if (!(serviceVersion.matches(versionRegex))) {
-                throw new IllegalArgumentException(
-                        String.format(GENERATOR_AAI_INVALID_SERVICE_VERSION));
+                throw new IllegalArgumentException(String.format(GENERATOR_AAI_INVALID_SERVICE_VERSION));
             }
         }
         return serviceVersion;
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/data/WidgetConfigurationUtil.java b/src/main/java/org/onap/aai/babel/xml/generator/data/WidgetConfigurationUtil.java
index d36982d..9f8cbf8 100644
--- a/src/main/java/org/onap/aai/babel/xml/generator/data/WidgetConfigurationUtil.java
+++ b/src/main/java/org/onap/aai/babel/xml/generator/data/WidgetConfigurationUtil.java
@@ -20,11 +20,15 @@
  */
 package org.onap.aai.babel.xml.generator.data;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.Properties;
 
 public class WidgetConfigurationUtil {
 
     private static Properties config;
+    private static List<String> instanceGroups = Collections.emptyList();
 
     /*
      * Private constructor to prevent instantiation
@@ -40,4 +44,15 @@ public class WidgetConfigurationUtil {
     public static void setConfig(Properties config) {
         WidgetConfigurationUtil.config = config;
     }
+
+    public static void setFilterConfig(Properties properties) {
+        String instanceGroupsList = (String) properties.get("AAI.instance-group-types");
+        if (instanceGroupsList != null) {
+            instanceGroups = Arrays.asList(instanceGroupsList.split(","));
+        }
+    }
+
+    public static boolean isSupportedInstanceGroup(String groupType) {
+        return instanceGroups.contains(groupType);
+    }
 }
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/model/InstanceGroup.java b/src/main/java/org/onap/aai/babel/xml/generator/model/InstanceGroup.java
new file mode 100644
index 0000000..f312064
--- /dev/null
+++ b/src/main/java/org/onap/aai/babel/xml/generator/model/InstanceGroup.java
@@ -0,0 +1,28 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 European Software Marketing Ltd.
+ * ================================================================================
+ * 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.onap.aai.babel.xml.generator.model;
+
+import org.onap.aai.babel.xml.generator.types.Cardinality;
+import org.onap.aai.babel.xml.generator.types.Model;
+
+@Model(widget = Widget.Type.INSTANCE_GROUP, cardinality = Cardinality.UNBOUNDED, dataDeleteFlag = true)
+public class InstanceGroup extends Resource {
+}
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/model/InstanceGroupWidget.java b/src/main/java/org/onap/aai/babel/xml/generator/model/InstanceGroupWidget.java
new file mode 100644
index 0000000..dabce34
--- /dev/null
+++ b/src/main/java/org/onap/aai/babel/xml/generator/model/InstanceGroupWidget.java
@@ -0,0 +1,31 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 European Software Marketing Ltd.
+ * ================================================================================
+ * 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.onap.aai.babel.xml.generator.model;
+
+import org.onap.aai.babel.xml.generator.types.Cardinality;
+import org.onap.aai.babel.xml.generator.types.ModelType;
+import org.onap.aai.babel.xml.generator.types.ModelWidget;
+
+@org.onap.aai.babel.xml.generator.types.Model(widget = Widget.Type.INSTANCE_GROUP, cardinality = Cardinality.UNBOUNDED,
+        dataDeleteFlag = true)
+@ModelWidget(type = ModelType.WIDGET, name = "instance-group")
+public class InstanceGroupWidget extends Widget {
+}
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/model/Model.java b/src/main/java/org/onap/aai/babel/xml/generator/model/Model.java
index 8e9c062..7b2fc42 100644
--- a/src/main/java/org/onap/aai/babel/xml/generator/model/Model.java
+++ b/src/main/java/org/onap/aai/babel/xml/generator/model/Model.java
@@ -20,7 +20,6 @@
  */
 package org.onap.aai.babel.xml.generator.model;
 
-import java.lang.reflect.InvocationTargetException;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -159,14 +158,33 @@ public abstract class Model {
         if (clazz != null) {
             try {
                 modelToBeReturned = Optional.ofNullable(clazz.getConstructor().newInstance());
-            } catch (InstantiationException | java.lang.IllegalAccessException | IllegalArgumentException
-                    | InvocationTargetException | NoSuchMethodException | SecurityException e) {
+            } catch (Exception e) {
                 log.error(ApplicationMsgs.INVALID_CSAR_FILE, e);
             }
         }
         return modelToBeReturned;
     }
 
+    /**
+     * Gets the object (model) corresponding to the supplied TOSCA type information, prioritising the metadata
+     * information.
+     *
+     * @param toscaType
+     *            the TOSCA type
+     * @param metaDataType
+     *            the type from the TOSCA metadata
+     * @return the model for the type, or null
+     */
+    public static Model getModelFor(String toscaType, String metaDataType) {
+        if ("Configuration".equals(metaDataType)) {
+            return new Configuration();
+        } else if ("CR".equals(metaDataType)) {
+            return new CR();
+        } else {
+            return getModelFor(toscaType);
+        }
+    }
+
     public abstract boolean addResource(Resource resource);
 
     public abstract boolean addWidget(Widget resource);
@@ -291,4 +309,5 @@ public abstract class Model {
             throw new IllegalAccessException(GENERATOR_AAI_ERROR_UNSUPPORTED_WIDGET_OPERATION);
         }
     }
+
 }
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/model/VfModule.java b/src/main/java/org/onap/aai/babel/xml/generator/model/VfModule.java
index 8b8913d..d6d3a2d 100644
--- a/src/main/java/org/onap/aai/babel/xml/generator/model/VfModule.java
+++ b/src/main/java/org/onap/aai/babel/xml/generator/model/VfModule.java
@@ -38,7 +38,7 @@ public class VfModule extends Resource {
     }
 
     /**
-     * Adds Widget.
+     * Adds a Widget.
      *
      * @param widget the widget
      * @return the boolean
diff --git a/src/main/java/org/onap/aai/babel/xml/generator/model/Widget.java b/src/main/java/org/onap/aai/babel/xml/generator/model/Widget.java
index 49e3811..d78e2e6 100644
--- a/src/main/java/org/onap/aai/babel/xml/generator/model/Widget.java
+++ b/src/main/java/org/onap/aai/babel/xml/generator/model/Widget.java
@@ -38,10 +38,28 @@ import org.onap.aai.cl.api.Logger;
 
 public abstract class Widget extends Model {
 
-    public static final String GENERATOR_AAI_CONFIGLPROP_NOT_FOUND = "Cannot generate artifacts. Widget configuration not found for %s";
+    public static final String GENERATOR_AAI_CONFIGLPROP_NOT_FOUND =
+            "Cannot generate artifacts. Widget configuration not found for %s";
 
     public enum Type {
-        SERVICE, VF, VFC, VSERVER, VOLUME, FLAVOR, TENANT, VOLUME_GROUP, LINT, L3_NET, VFMODULE, IMAGE, OAM_NETWORK, ALLOTTED_RESOURCE, TUNNEL_XCONNECT, CONFIGURATION, CR;
+        SERVICE,
+        VF,
+        VFC,
+        VSERVER,
+        VOLUME,
+        FLAVOR,
+        TENANT,
+        VOLUME_GROUP,
+        LINT,
+        L3_NET,
+        VFMODULE,
+        IMAGE,
+        OAM_NETWORK,
+        ALLOTTED_RESOURCE,
+        TUNNEL_XCONNECT,
+        CONFIGURATION,
+        CR,
+        INSTANCE_GROUP;
     }
 
     private static Logger log = LogHelper.INSTANCE;
@@ -67,13 +85,13 @@ public abstract class Widget extends Model {
         typeToWidget.put(Type.TUNNEL_XCONNECT, TunnelXconnectWidget.class);
         typeToWidget.put(Type.CONFIGURATION, ConfigurationWidget.class);
         typeToWidget.put(Type.CR, CRWidget.class);
+        typeToWidget.put(Type.INSTANCE_GROUP, InstanceGroupWidget.class);
     }
 
     /**
      * Gets widget.
      *
-     * @param type
-     *            the type
+     * @param type the type
      * @return the widget
      */
     public static Widget getWidget(Type type) {
@@ -139,8 +157,7 @@ public abstract class Widget extends Model {
     /**
      * Equals method that compares Widget IDs.
      *
-     * @param obj
-     *            the Widget object to compare
+     * @param obj the Widget object to compare
      * @return whether or not obj is equal to this Widget
      */
     @Override
@@ -163,8 +180,7 @@ public abstract class Widget extends Model {
     /**
      * Determine whether one or more keys belonging to this Widget appear in the specified Collection.
      *
-     * @param keys
-     *            the keys
+     * @param keys the keys
      * @return the boolean
      */
     public boolean memberOf(Collection<String> keys) {
@@ -183,5 +199,4 @@ public abstract class Widget extends Model {
     public boolean addWidget(Widget widget) {
         return true;
     }
-
 }