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require 'json-schema/attribute'
module JSON
class Schema
class TypeAttribute < Attribute
def self.validate(current_schema, data, fragments, processor, validator, options = {})
union = true
if options[:disallow]
types = current_schema.schema['disallow']
else
types = current_schema.schema['type']
end
if !types.is_a?(Array)
types = [types]
union = false
end
valid = false
# Create a hash to hold errors that are generated during union validation
union_errors = Hash.new { |hsh, k| hsh[k] = [] }
types.each_with_index do |type, type_index|
if type.is_a?(String)
valid = data_valid_for_type?(data, type)
elsif type.is_a?(Hash) && union
# Validate as a schema
schema = JSON::Schema.new(type,current_schema.uri,validator)
# We're going to add a little cruft here to try and maintain any validation errors that occur in this union type
# We'll handle this by keeping an error count before and after validation, extracting those errors and pushing them onto a union error
pre_validation_error_count = validation_errors(processor).count
begin
schema.validate(data,fragments,processor,options.merge(:disallow => false))
valid = true
rescue ValidationError
# We don't care that these schemas don't validate - we only care that one validated
end
diff = validation_errors(processor).count - pre_validation_error_count
valid = false if diff > 0
while diff > 0
diff = diff - 1
union_errors["type ##{type_index}"].push(validation_errors(processor).pop)
end
end
break if valid
end
if options[:disallow]
return if !valid
message = "The property '#{build_fragment(fragments)}' matched one or more of the following types: #{list_types(types)}"
validation_error(processor, message, fragments, current_schema, self, options[:record_errors])
elsif !valid
if union
message = "The property '#{build_fragment(fragments)}' of type #{type_of_data(data)} did not match one or more of the following types: #{list_types(types)}"
validation_error(processor, message, fragments, current_schema, self, options[:record_errors])
validation_errors(processor).last.sub_errors = union_errors
else
message = "The property '#{build_fragment(fragments)}' of type #{type_of_data(data)} did not match the following type: #{list_types(types)}"
validation_error(processor, message, fragments, current_schema, self, options[:record_errors])
end
end
end
def self.list_types(types)
types.map { |type| type.is_a?(String) ? type : '(schema)' }.join(', ')
end
# Lookup Schema type of given class instance
def self.type_of_data(data)
type, _ = TYPE_CLASS_MAPPINGS.map { |k,v| [k,v] }.sort_by { |(_, v)|
-Array(v).map { |klass| klass.ancestors.size }.max
}.find { |(_, v)|
Array(v).any? { |klass| data.kind_of?(klass) }
}
type
end
end
end
end
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