OMM 
OMM is a one more mapper that helps to map JSON and property list objects to Swift instances.
Features
Firstly, OMM provides only one-way conversion from JSON. For both to and from conversions try something else like SwiftyJSON, ObjectMapper or whatever.
OMM also provides one-way conversion from property list.
OMM does not extend any standard types. It allows to keep clear compact API.
OMM supports Swift error handling.
OMM provides subscript syntax to get values from both objects and arrays.
OMM allows to distinguish absence of value and wrong value.
OMM gives opportunity to reuse mapping using mappable types and custom transforms.
Quick Start
Initialization
import OMM
let jsonDataNode = makeNode(forJSON: someData)
let propertyListDataNode = makeNode(forPropertyList: anotherData)
let anyObjectNode = makeNode(for: anyObject)Subscript
let nodeForArrayElement = node[42]
let nodeForPopertyValue = node["propertyName"]
let nodeForMixedPath = node["property", "anotherProperty", 0]Materialization
let intValue = try node.value(Int.self)
let arrayOfStrings = try node.array(String.self)Error handling
do {
let intValue: Int = try node.value()
// intValue contains non-optional integer value
} catch let error as MappingError {
// There is no value or value is not number
} catch {
// Actually, never happens
}Optionals
do {
let intValue = try node.optional?.value(Int.self)
// intValue contains optional integer value
} catch {
// Value is not number
}
let stringValue = try? node.value(String.self)
// stringValue contains optional string value anywayTransforms
let urlValue = try node.value(transformedWith: URLTransform())
struct LengthTransform: Transform {
func apply(to node: Node) throws -> Double {
let value = try node.value(Double.self)
if value < 0 {
throw error(reason: "Length should be non-negative")
}
return value
}
}
let length = try node.value(transformedWith: LengthTransform())Mappable types
struct User: Mappable {
let identifier: Int64
let name: String
init(node: Node) throws {
identifier = try node["user_id"].required.value(transformedWith: Int64Transform)
name = try node["user_name"].optional?.value(String.self) ?? ""
}
}
let user = try node.value(User)License
OMM is released under the MIT License.
Installation
- Using CocoaPods
pod 'OMM'
# to get property list support as well
pod 'OMM/PropertyList'- Using Carthage
github "fen-x/OMM"
- Use
OMM4JSON.frameworkfor JSON only support. - Use
OMM4PropertyList.frameworkfor property list support. - Use
OMM.frameworkfor both JSON and property list support.
Do not forget to use appropriate module name for import declaration: OMM4JSON, OMM4PropertyList, and OMM, respectively.
- Using Git submodules