added iOS source code

[wl-app.git] / iOS / Pods / RealmSwift / RealmSwift / Schema.swift

diff --git a/iOS/Pods/RealmSwift/RealmSwift/Schema.swift b/iOS/Pods/RealmSwift/RealmSwift/Schema.swift
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+////////////////////////////////////////////////////////////////////////////
+//
+// 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
+
+/**
+ `Schema` instances represent collections of model object schemas managed by a Realm.
+
+ When using Realm, `Schema` instances allow performing migrations and introspecting the database's schema.
+
+ Schemas map to collections of tables in the core database.
+ */
+public struct Schema: CustomStringConvertible {
+
+    // MARK: Properties
+
+    internal let rlmSchema: RLMSchema
+
+    /**
+     An array of `ObjectSchema`s for all object types in the Realm.
+
+     This property is intended to be used during migrations for dynamic introspection.
+     */
+    public var objectSchema: [ObjectSchema] {
+        return rlmSchema.objectSchema.map(ObjectSchema.init)
+    }
+
+    /// A human-readable description of the object schemas contained within.
+    public var description: String { return rlmSchema.description }
+
+    // MARK: Initializers
+
+    internal init(_ rlmSchema: RLMSchema) {
+        self.rlmSchema = rlmSchema
+    }
+
+    // MARK: ObjectSchema Retrieval
+
+    /// Looks up and returns an `ObjectSchema` for the given class name in the Realm, if it exists.
+    public subscript(className: String) -> ObjectSchema? {
+        if let rlmObjectSchema = rlmSchema.schema(forClassName: className) {
+            return ObjectSchema(rlmObjectSchema)
+        }
+        return nil
+    }
+}
+
+// MARK: Equatable
+
+extension Schema: Equatable {
+    /// Returns whether the two schemas are equal.
+    public static func == (lhs: Schema, rhs: Schema) -> Bool {
+        return lhs.rlmSchema.isEqual(to: rhs.rlmSchema)
+    }
+}