WIP: documentation

Sources/FetchChainBuilder.swift

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+//
+//  FetchChainBuilder.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import Foundation
+import CoreData
+
+
+// MARK: - FetchChainBuilder
+
+/**
+ The fetch builder type used for fetches. A `FetchChainBuilder` is created from a `From` clause.
+ ```
+ let people = source.fetchAll(
+     From<MyPersonEntity>()
+         .where(\.age > 18)
+         .orderBy(.ascending(\.age))
+ )
+ ```
+ */
+public struct FetchChainBuilder<D: DynamicObject>: FetchChainableBuilderType {
+    
+    // MARK: FetchChainableBuilderType
+    
+    public typealias ObjectType = D
+    
+    public var from: From<D>
+    public var fetchClauses: [FetchClause] = []
+}
+
+
+// MARK: - FetchChainableBuilderType
+
+/**
+ Utility protocol for `FetchChainBuilder`. Used in fetch methods that support chained fetch builders.
+ */
+public protocol FetchChainableBuilderType {
+    
+    /**
+     The `DynamicObject` type for the fetch
+     */
+    associatedtype ObjectType: DynamicObject
+    
+    /**
+     The `From` clause specifies the source entity and source persistent store for the fetch
+     */
+    var from: From<ObjectType> { get set }
+    
+    /**
+     The `FetchClause`s to be used for the fetch
+     */
+    var fetchClauses: [FetchClause] { get set }
+}