From 6ec714c9120ff56ca0968bc22a83194274a368c1 Mon Sep 17 00:00:00 2001
From: Karim Bogtob <karim.bogtob@perfect-memory.com>
Date: Thu, 19 May 2016 15:21:32 +0200
Subject: [PATCH 1/2] Make the RDF::Repository have only one context at a time.

---
 lib/rdf/sesame/repository.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/rdf/sesame/repository.rb b/lib/rdf/sesame/repository.rb
index 06968c0..f13a8b1 100644
--- a/lib/rdf/sesame/repository.rb
+++ b/lib/rdf/sesame/repository.rb
@@ -41,7 +41,7 @@ class Repository < RDF::Repository
     # @return [String]
     attr_reader :writeble
 
-    # @return [String,Array]
+    # @return [String]
     attr_reader :context
 
     # Maximum length for GET query
@@ -358,7 +358,7 @@ def write_query(query, queryLn, options)
     # @param context the context(s) to use
     def set_context(*context)
       options||={}
-      @context = serialize_context(context)
+      @context = Array(serialize_context(context)).first
     end
 
     ##

From 6fb13b250c04d96f7fdcee67a0b895c9a55da12c Mon Sep 17 00:00:00 2001
From: Karim Bogtob <karim.bogtob@perfect-memory.com>
Date: Thu, 19 May 2016 15:24:14 +0200
Subject: [PATCH 2/2] Make the delete operation symetric to the insert
 operation.

The delete operation now initialize the context of statements with the context uri when a context is set on the RDF Repository.
---
 lib/rdf/sesame/repository.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/rdf/sesame/repository.rb b/lib/rdf/sesame/repository.rb
index f13a8b1..36f427d 100644
--- a/lib/rdf/sesame/repository.rb
+++ b/lib/rdf/sesame/repository.rb
@@ -44,6 +44,9 @@ class Repository < RDF::Repository
     # @return [String]
     attr_reader :context
 
+    # @return [RDF::URI]
+    attr_reader :context_uri
+
     # Maximum length for GET query
     MAX_LENGTH_GET_QUERY = 2500
 
@@ -359,6 +362,12 @@ def write_query(query, queryLn, options)
     def set_context(*context)
       options||={}
       @context = Array(serialize_context(context)).first
+      @context_uri =  if context
+                        uri = context[1..-2]
+                        uri && !uri.empty? ? RDF::URI.new(uri) : nil
+                      else
+                        nil
+                      end
     end
 
     ##
@@ -427,6 +436,7 @@ def insert_statements(statements)
     # @see RDF::Mutable#delete
     # @see http://www.openrdf.org/doc/sesame2/system/ch08.html#d0e304
     def delete_statement(statement)
+      statement.context = context_uri if context_uri
       response = server.delete(path(:statements, statement))
       response.code == "204"
     end