diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
index e6ca4ad..48e5888 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
@@ -23,6 +23,7 @@ import javax.ws.rs.core.Response.Status;
 import javax.ws.rs.core.UriInfo;
 
 import org.gcube.common.authorization.library.provider.CalledMethodProvider;
+import org.gcube.common.gxhttp.reference.GXConnection.HTTPMETHOD;
 import org.gcube.informationsystem.model.reference.entity.Resource;
 import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.AvailableInAnotherContextException;
@@ -32,7 +33,6 @@ import org.gcube.informationsystem.resourceregistry.api.exceptions.context.Conte
 import org.gcube.informationsystem.resourceregistry.api.exceptions.query.InvalidQueryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.SchemaNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
-import org.gcube.informationsystem.resourceregistry.api.rest.httputils.HTTPCall.HTTPMETHOD;
 import org.gcube.informationsystem.resourceregistry.context.ContextManagement;
 import org.gcube.informationsystem.resourceregistry.context.ContextUtility;
 import org.gcube.informationsystem.resourceregistry.er.ERManagement;
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java
index c36c23a..c600eb5 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java
@@ -13,13 +13,13 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
 
+import org.gcube.common.gxhttp.reference.GXConnection.HTTPMETHOD;
 import org.gcube.informationsystem.model.reference.entity.Context;
 import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
 import org.gcube.informationsystem.resourceregistry.api.rest.ContextPath;
-import org.gcube.informationsystem.resourceregistry.api.rest.httputils.HTTPCall.HTTPMETHOD;
 import org.gcube.informationsystem.resourceregistry.context.ContextManagement;
 import org.gcube.informationsystem.resourceregistry.context.ContextUtility;
 import org.slf4j.Logger;
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java
index d87a713..bdc4cb9 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java
@@ -20,13 +20,13 @@ import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.Response.Status;
 
+import org.gcube.common.gxhttp.reference.GXConnection.HTTPMETHOD;
 import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.AvailableInAnotherContextException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.NotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
 import org.gcube.informationsystem.resourceregistry.api.rest.InstancePath;
-import org.gcube.informationsystem.resourceregistry.api.rest.httputils.HTTPCall.HTTPMETHOD;
 import org.gcube.informationsystem.resourceregistry.er.ERManagement;
 import org.gcube.informationsystem.resourceregistry.er.ERManagementUtility;
 import org.slf4j.Logger;
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java
index ee27b0e..54ba229 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java
@@ -18,6 +18,7 @@ import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.Response.Status;
 
+import org.gcube.common.gxhttp.reference.GXConnection.HTTPMETHOD;
 import org.gcube.informationsystem.model.reference.AccessType;
 import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
@@ -26,7 +27,6 @@ import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.Schema
 import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
 import org.gcube.informationsystem.resourceregistry.api.rest.InstancePath;
 import org.gcube.informationsystem.resourceregistry.api.rest.TypePath;
-import org.gcube.informationsystem.resourceregistry.api.rest.httputils.HTTPCall.HTTPMETHOD;
 import org.gcube.informationsystem.resourceregistry.er.ERManagementUtility;
 import org.gcube.informationsystem.resourceregistry.schema.SchemaManagement;
 import org.gcube.informationsystem.resourceregistry.schema.SchemaManagementImpl;
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManagement.java
index bd1b471..bcb1129 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManagement.java
@@ -9,13 +9,13 @@ import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 
+import org.gcube.common.gxhttp.reference.GXConnection.HTTPMETHOD;
 import org.gcube.informationsystem.model.reference.entity.Context;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.resource.ResourceNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
 import org.gcube.informationsystem.resourceregistry.api.rest.SharingPath;
-import org.gcube.informationsystem.resourceregistry.api.rest.httputils.HTTPCall.HTTPMETHOD;
 import org.gcube.informationsystem.resourceregistry.er.ERManagement;
 import org.gcube.informationsystem.resourceregistry.er.ERManagementUtility;
 import org.slf4j.Logger;