added JSONValue additions

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

MVMCore/MVMCore/Models/JSON/JSONValue.swift

@@ -13,6 +13,7 @@ public typealias JSONValueDictionary = [String: JSONValue]
 
 public enum JSONValueError: Error {
     case encode
+    case TypeMismatch
 }
 
 extension Optional {
@@ -68,6 +69,38 @@ public enum JSONValue: Codable, Equatable {
         case .null: break
         }
     }
+    
+    public var base: Any {
+        switch self {
+        case .string(let string): return string
+        case .int(let int): return int
+        case .double(let double): return double
+        case .bool(let bool): return bool
+        case .object(let object): return try! object.toJSONAny()
+        case .array(let array): return try! array.toJSONArray()
+        case .null: return NSNull()
+        }
+    }
+    
+    public func value<T>() throws -> T {
+        guard let base = self.base as? T else {
+           throw JSONValueError.TypeMismatch
+        }
+        return base
+    }
+    
+    private func value<T>(type: T.Type) throws -> T {
+        let base: T = try value()
+        return base
+    }
+    
+    public func toString() throws -> String { try value(type: String.self) }
+    public func toDouble() throws -> Double {  try value(type: Double.self) }
+    public func toInt() throws -> Int { try value(type: Int.self) }
+    public func toBool() throws -> Bool { try value(type: Bool.self) }
+    public func toArray<T>(of type: T.Type) throws -> [T]{ try value(type: [T].self) }
+    public func toObject<T>(of type: T.Type) throws -> T { try value(type: T.self) }
+
 }
 
 public func ==(lhs: JSONValue, rhs: JSONValue) -> Bool {