Ported r75 (all JSON value classes) from POC_CONVERTERS_FACTORY branch to trunk

library/kernel/json_array.e

@@ -41,6 +41,25 @@ feature -- Access
             Result := values.i_th (i)
         end
 
+    representation: STRING is
+        local
+            i: INTEGER
+        do
+            Result := "["
+            from
+                i := 1
+            until
+                i > count
+            loop
+                Result.append (i_th (i).representation)
+                i := i + 1
+                if i <= count then
+                    Result.append_character (',')
+                end
+            end
+            Result.append_character (']')
+        end
+        
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is

library/kernel/json_boolean.e

@@ -32,6 +32,15 @@ feature -- Access
             Result := item.hash_code
         end
 
+    representation: STRING is
+        do
+            if item then
+                Result := "true"
+            else
+                Result := "false"
+            end
+        end
+        
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is

library/kernel/json_null.e

@@ -18,6 +18,11 @@ feature --Access
             Result := null_value.hash_code
         end
 
+    representation: STRING is
+        do
+            Result := "null"
+        end
+        
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is

library/kernel/json_number.e

@@ -17,19 +17,27 @@ inherit
 
 create
     make_integer,
+    make_natural,
     make_real
 
 feature {NONE} -- initialization
 
-	make_integer (an_argument: INTEGER) is
+    make_integer (an_argument: INTEGER_64) is
-			-- Initialize  an instance of JSON_NUMBER as INTEGER
+            -- Initialize an instance of JSON_NUMBER from the integer value of `an_argument'.
         do
             item := an_argument.out
             numeric_type := INTEGER_TYPE
         end
 
+    make_natural (an_argument: NATURAL_64) is
+            -- Initialize an instance of JSON_NUMBER from the unsigned integer value of `an_argument'.
+        do
+            item := an_argument.out
+            numeric_type := NATURAL_TYPE
+        end
+
     make_real (an_argument: DOUBLE) is
-			-- Initialize an instance of JSON_NUMBER as DOUBLE
+            -- Initialize an instance of JSON_NUMBER from the floating point value of `an_argument'.
         do
             item := an_argument.out
             numeric_type := DOUBLE_TYPE
@@ -46,6 +54,11 @@ feature -- Access
             Result := item.hash_code
         end
 
+    representation: STRING is
+        do
+            Result := item
+        end
+        
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is
@@ -76,6 +89,7 @@ feature -- Implementation
 
     INTEGER_TYPE: INTEGER is 1
     DOUBLE_TYPE: INTEGER is 2
+    NATURAL_TYPE: INTEGER is 3
 
     numeric_type: INTEGER
 

library/kernel/json_object.e

@@ -76,6 +76,28 @@ feature -- Access
             Result := object.current_keys
         end
 
+    representation: STRING is
+        local
+            t: HASH_TABLE [JSON_VALUE, JSON_STRING]
+        do
+            Result := "{"
+            from
+                t := map_representation
+                t.start
+            until
+                t.after
+            loop
+                Result.append (t.key_for_iteration.representation)
+                Result.append (":")
+                Result.append (t.item_for_iteration.representation)
+                t.forth
+                if not t.after then
+                    Result.append_character (',')
+                end 
+            end
+            Result.append_character ('}')
+        end
+
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is

library/kernel/json_string.e

@@ -31,7 +31,7 @@ feature {NONE} -- Initialization
         require
             item_not_void: an_item /= Void
         do
-			item := an_item
+            item := escaped_json_string (an_item)
         end
 
 feature -- Access
@@ -39,6 +39,13 @@ feature -- Access
     item: STRING
             -- Contents
 
+    representation: STRING is
+        do
+            Result := "%""
+            Result.append (item)
+            Result.append_character ('%"')
+        end
+        
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is
@@ -83,6 +90,18 @@ feature -- Status report
             Result := item
         end
 
+feature {NONE} -- Implementation
+
+    escaped_json_string (s: STRING): STRING is
+            -- JSON string with '"' and '\' characters escaped
+        require
+            s_not_void: s /= Void
+        do
+            Result := s.twin
+            Result.replace_substring_all ("\", "\\")
+            Result.replace_substring_all ("%"", "\%"")
+        end
+    
 invariant
     value_not_void: item /= Void
 

library/kernel/json_value.e

@@ -23,6 +23,13 @@ inherit
 
     DEBUG_OUTPUT
     
+feature -- Access
+
+    representation: STRING is
+            -- UTF-8 encoded Unicode string representation of Current
+        deferred
+        end
+
 feature -- Visitor pattern
 
     accept (a_visitor: JSON_VISITOR) is