getSchema() from URI should support subschema references

[aznan2]

Suppose we have a schema at http://example.com/schema.json that looks like this:

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "oneOf": [
    {
      "$ref": "#/definitions/one"
    },
    {
      "$ref": "#/definitions/two"
    }
  ],
  "definitions": {
    "one": {
      "type": "integer",
      "enum": [1]
    },
    "two": {
      "type": "integer",
      "enum": [2]
    }
  }
}

If the "one" subschema is referenced through another schema ("$ref": "http://example.com/schema.json#/definitions/one"), then data will only be validated against the subschema - 1 will pass validation while 2 will fail.

Currently, however, if the same URI is used in a schema factory (jsonSchemaFactory.getSchema(new URI("http://example.com/schema.json#/definitions/one"))), then the fragment part of the URI is ignored and both 1 and 2 will pass validation.

It would be great if getSchema() would behave the same way as $ref and only return the referenced subschema.