--- /dev/null
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2014 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+import Foundation
+import Realm
+
+/**
+ This class represents Realm model object schemas.
+
+ When using Realm, `ObjectSchema` instances allow performing migrations and introspecting the database's schema.
+
+ Object schemas map to tables in the core database.
+ */
+public struct ObjectSchema: CustomStringConvertible {
+
+ // MARK: Properties
+
+ internal let rlmObjectSchema: RLMObjectSchema
+
+ /**
+ An array of `Property` instances representing the managed properties of a class described by the schema.
+
+ - see: `Property`
+ */
+ public var properties: [Property] {
+ return rlmObjectSchema.properties.map { Property($0) }
+ }
+
+ /// The name of the class the schema describes.
+ public var className: String { return rlmObjectSchema.className }
+
+ /// The property which serves as the primary key for the class the schema describes, if any.
+ public var primaryKeyProperty: Property? {
+ if let rlmProperty = rlmObjectSchema.primaryKeyProperty {
+ return Property(rlmProperty)
+ }
+ return nil
+ }
+
+ /// A human-readable description of the properties contained in the object schema.
+ public var description: String { return rlmObjectSchema.description }
+
+ // MARK: Initializers
+
+ internal init(_ rlmObjectSchema: RLMObjectSchema) {
+ self.rlmObjectSchema = rlmObjectSchema
+ }
+
+ // MARK: Property Retrieval
+
+ /// Returns the property with the given name, if it exists.
+ public subscript(propertyName: String) -> Property? {
+ if let rlmProperty = rlmObjectSchema[propertyName] {
+ return Property(rlmProperty)
+ }
+ return nil
+ }
+}
+
+// MARK: Equatable
+
+extension ObjectSchema: Equatable {
+ /// Returns whether the two object schemas are equal.
+ public static func == (lhs: ObjectSchema, rhs: ObjectSchema) -> Bool {
+ return lhs.rlmObjectSchema.isEqual(to: rhs.rlmObjectSchema)
+ }
+}