Reading array out of bound with JacksonJsonNodeJsonProvider

[rigazilla]

I'm accessing an array out-of-bound and I got a NullNode instead of an exception or a java null (if exceptions are suppressed).

This creates ambiguity as following:

           {
              "grades": [85, 90, 78, null, 44],
              "p1": null
            }

           JsonNode n1 = ctx.read("$.grades[3]");  // NullNode (valid index with null value)
           JsonNode n2 = ctx.read("$.grades[5]");  // NullNode (out of bounds)
           JsonNode n3 = ctx.read("$.p1");         // NullNode (existing property with null value)
           JsonNode n4 = ctx.read("$.p2");         // Exception or null (nonexistent property)

no way of distinguish an out-of-bound access from an existing null element

IMO array element access should behave like property access