1 files changed, 51 insertions, 1 deletions
diff --git a/openecomp-be/lib/openecomp-tosca-lib/src/main/java/org/openecomp/sdc/tosca/services/ToscaUtil.java b/openecomp-be/lib/openecomp-tosca-lib/src/main/java/org/openecomp/sdc/tosca/services/ToscaUtil.java
index f3bf3280dc..3b7db49fee 100644
--- a/openecomp-be/lib/openecomp-tosca-lib/src/main/java/org/openecomp/sdc/tosca/services/ToscaUtil.java
+++ b/openecomp-be/lib/openecomp-tosca-lib/src/main/java/org/openecomp/sdc/tosca/services/ToscaUtil.java
@@ -20,10 +20,16 @@
 
 package org.openecomp.sdc.tosca.services;
 
+import org.apache.commons.collections4.MapUtils;
+import org.openecomp.core.utilities.file.FileUtils;
+import org.openecomp.sdc.tosca.datatypes.model.NodeTemplate;
 import org.openecomp.sdc.tosca.datatypes.model.ServiceTemplate;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
 import java.util.UUID;
 
 /**
@@ -50,7 +56,7 @@ public class ToscaUtil {
   /**
    * Gets service template file name.
    *
-   * @param metaData the file name
+   * @param metadata the file name
    * @return the service template file name
    */
   public static String getServiceTemplateFileName(Map<String, String> metadata) {
@@ -63,6 +69,50 @@ public class ToscaUtil {
 
   }
 
+  public static Optional<String> getSubstitutableGroupMemberId(String heatFileName,
+                                                         ServiceTemplate serviceTemplate){
+
+    Map<String, NodeTemplate> nodeTemplates =
+        DataModelUtil.getNodeTemplates(serviceTemplate);
+
+    if(MapUtils.isEmpty(nodeTemplates)){
+      return Optional.empty();
+    }
+
+    String heatFileNameWithoutExt = FileUtils.getFileWithoutExtention(heatFileName);
+
+    for(Map.Entry<String, NodeTemplate> nodeTemplateEntry : nodeTemplates.entrySet()){
+      String subServiceTemplateName =
+          getSubstitutionServiceTemplateNameFromProperties(nodeTemplateEntry);
+
+      if(Objects.nonNull(subServiceTemplateName)
+          && isGroupMemberIdSubstitutable(heatFileNameWithoutExt, subServiceTemplateName)){
+        return Optional.of(nodeTemplateEntry.getKey());
+      }
+    }
+
+    return Optional.empty();
+  }
+
+  private static boolean isGroupMemberIdSubstitutable(String heatFileNameWithoutExt,
+                                                      String subServiceTemplateName) {
+    return subServiceTemplateName.startsWith(heatFileNameWithoutExt);
+  }
+
+  private static String getSubstitutionServiceTemplateNameFromProperties(
+      Map.Entry<String, NodeTemplate> nodeTemplateEntry) {
+    Map<String, Object> properties =
+        nodeTemplateEntry.getValue().getProperties() == null ? Collections.emptyMap() :
+            nodeTemplateEntry.getValue().getProperties();
+
+    Map<String, Object> serviceTemplateFilter =
+        properties.containsKey(ToscaConstants.SERVICE_TEMPLATE_FILTER_PROPERTY_NAME)?
+            (Map<String, Object>) properties.get(ToscaConstants
+                .SERVICE_TEMPLATE_FILTER_PROPERTY_NAME) : Collections.emptyMap();
+
+    return (String) serviceTemplateFilter.get(ToscaConstants.SUBSTITUTE_SERVICE_TEMPLATE_PROPERTY_NAME);
+  }
+
 
   /**
    * Add service template to map with key file name.