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71 lines
2.2 KiB
71 lines
2.2 KiB
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2014 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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import Foundation
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import Realm
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/**
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`Schema` instances represent collections of model object schemas managed by a Realm.
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When using Realm, `Schema` instances allow performing migrations and introspecting the database's schema.
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Schemas map to collections of tables in the core database.
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*/
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public struct Schema: CustomStringConvertible {
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// MARK: Properties
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internal let rlmSchema: RLMSchema
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/**
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An array of `ObjectSchema`s for all object types in the Realm.
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This property is intended to be used during migrations for dynamic introspection.
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*/
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public var objectSchema: [ObjectSchema] {
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return rlmSchema.objectSchema.map(ObjectSchema.init)
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}
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/// A human-readable description of the object schemas contained within.
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public var description: String { return rlmSchema.description }
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// MARK: Initializers
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internal init(_ rlmSchema: RLMSchema) {
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self.rlmSchema = rlmSchema
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}
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// MARK: ObjectSchema Retrieval
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/// Looks up and returns an `ObjectSchema` for the given class name in the Realm, if it exists.
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public subscript(className: String) -> ObjectSchema? {
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if let rlmObjectSchema = rlmSchema.schema(forClassName: className) {
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return ObjectSchema(rlmObjectSchema)
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}
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return nil
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}
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}
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// MARK: Equatable
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extension Schema: Equatable {
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/// Returns whether the two schemas are equal.
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public static func == (lhs: Schema, rhs: Schema) -> Bool {
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return lhs.rlmSchema.isEqual(to: rhs.rlmSchema)
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}
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}
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