restructured files, added way to transform section names in ManagedObjectListControllers

HardcoreData/Internal/NSManagedObjectContext+Querying.swift

@@ -0,0 +1,323 @@
+//
+//  NSManagedObjectContext+Querying.swift
+//  HardcoreData
+//
+//  Copyright (c) 2015 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: - NSManagedObjectContext
+
+internal extension NSManagedObjectContext {
+    
+    // MARK: Public
+    
+    internal func fetchOne<T: NSManagedObject>(from: From<T>, _ fetchClauses: FetchClause...) -> T? {
+        
+        return self.fetchOne(from, fetchClauses)
+    }
+    
+    internal func fetchOne<T: NSManagedObject>(from: From<T>, _ fetchClauses: [FetchClause]) -> T? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 1
+        fetchRequest.resultType = .ManagedObjectResultType
+        
+        for clause in fetchClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var fetchResults: [T]?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            fetchResults = self.executeFetchRequest(fetchRequest, error: &error) as? [T]
+        }
+        if fetchResults == nil {
+            
+            HardcoreData.handleError(
+                error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+                "Failed executing fetch request.")
+            return nil
+        }
+        
+        return fetchResults?.first
+    }
+    
+    internal func fetchAll<T: NSManagedObject>(from: From<T>, _ fetchClauses: FetchClause...) -> [T]? {
+        
+        return self.fetchAll(from, fetchClauses)
+    }
+    
+    internal func fetchAll<T: NSManagedObject>(from: From<T>, _ fetchClauses: [FetchClause]) -> [T]? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 0
+        fetchRequest.resultType = .ManagedObjectResultType
+        
+        for clause in fetchClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var fetchResults: [T]?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            fetchResults = self.executeFetchRequest(fetchRequest, error: &error) as? [T]
+        }
+        if fetchResults == nil {
+            
+            HardcoreData.handleError(
+                error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+                "Failed executing fetch request.")
+            return nil
+        }
+        
+        return fetchResults
+    }
+    
+    internal func fetchCount<T: NSManagedObject>(from: From<T>, _ fetchClauses: FetchClause...) -> Int? {
+    
+        return self.fetchCount(from, fetchClauses)
+    }
+    
+    internal func fetchCount<T: NSManagedObject>(from: From<T>, _ fetchClauses: [FetchClause]) -> Int? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        
+        for clause in fetchClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var count = 0
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            count = self.countForFetchRequest(fetchRequest, error: &error)
+        }
+        if count == NSNotFound {
+            
+            HardcoreData.handleError(
+                error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+                "Failed executing fetch request.")
+            return nil
+        }
+        
+        return count
+    }
+    
+    internal func fetchObjectID<T: NSManagedObject>(from: From<T>, _ fetchClauses: FetchClause...) -> NSManagedObjectID? {
+        
+        return self.fetchObjectID(from, fetchClauses)
+    }
+    
+    internal func fetchObjectID<T: NSManagedObject>(from: From<T>, _ fetchClauses: [FetchClause]) -> NSManagedObjectID? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 1
+        fetchRequest.resultType = .ManagedObjectIDResultType
+        
+        for clause in fetchClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var fetchResults: [NSManagedObjectID]?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            fetchResults = self.executeFetchRequest(fetchRequest, error: &error) as? [NSManagedObjectID]
+        }
+        if fetchResults == nil {
+            
+            HardcoreData.handleError(
+                error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+                "Failed executing fetch request.")
+            return nil
+        }
+        
+        return fetchResults?.first
+    }
+    
+    internal func fetchObjectIDs<T: NSManagedObject>(from: From<T>, _ fetchClauses: FetchClause...) -> [NSManagedObjectID]? {
+        
+        return self.fetchObjectIDs(from, fetchClauses)
+    }
+    
+    internal func fetchObjectIDs<T: NSManagedObject>(from: From<T>, _ fetchClauses: [FetchClause]) -> [NSManagedObjectID]? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 0
+        fetchRequest.resultType = .ManagedObjectIDResultType
+        
+        for clause in fetchClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var fetchResults: [NSManagedObjectID]?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            fetchResults = self.executeFetchRequest(fetchRequest, error: &error) as? [NSManagedObjectID]
+        }
+        if fetchResults == nil {
+            
+            HardcoreData.handleError(
+                error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+                "Failed executing fetch request.")
+            return nil
+        }
+        
+        return fetchResults
+    }
+    
+    internal func deleteAll<T: NSManagedObject>(from: From<T>, _ deleteClauses: DeleteClause...) -> Int? {
+        
+        return self.deleteAll(from, deleteClauses)
+    }
+    
+    internal func deleteAll<T: NSManagedObject>(from: From<T>, _ deleteClauses: [DeleteClause]) -> Int? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 0
+        fetchRequest.resultType = .ManagedObjectResultType
+        fetchRequest.returnsObjectsAsFaults = true
+        
+        for clause in deleteClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var numberOfDeletedObjects: Int?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            autoreleasepool {
+                
+                if let fetchResults = self.executeFetchRequest(fetchRequest, error: &error) as? [T] {
+                    
+                    numberOfDeletedObjects = fetchResults.count
+                    for object in fetchResults {
+                        
+                        self.deleteObject(object)
+                    }
+                }
+            }
+        }
+        if numberOfDeletedObjects == nil {
+            
+            HardcoreData.handleError(
+                error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+                "Failed executing fetch request.")
+            return nil
+        }
+        
+        return numberOfDeletedObjects
+    }
+    
+    internal func queryValue<T: NSManagedObject, U: SelectValueResultType>(from: From<T>, _ selectClause: Select<U>, _ queryClauses: QueryClause...) -> U? {
+        
+        return self.queryValue(from, selectClause, queryClauses)
+    }
+    
+    internal func queryValue<T: NSManagedObject, U: SelectValueResultType>(from: From<T>, _ selectClause: Select<U>, _ queryClauses: [QueryClause]) -> U? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 0
+        
+        selectClause.applyToFetchRequest(fetchRequest)
+        
+        for clause in queryClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var fetchResults: [AnyObject]?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            fetchResults = self.executeFetchRequest(fetchRequest, error: &error)
+        }
+        if let fetchResults = fetchResults {
+            
+            if let rawResult = fetchResults.first as? NSDictionary,
+                let rawObject: AnyObject = rawResult[selectClause.keyPathForFirstSelectTerm()] {
+                    
+                    return Select<U>.ReturnType.fromResultObject(rawObject)
+            }
+            return nil
+        }
+        
+        HardcoreData.handleError(
+            error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+            "Failed executing fetch request.")
+        return nil
+    }
+    
+    internal func queryAttributes<T: NSManagedObject>(from: From<T>, _ selectClause: Select<NSDictionary>, _ queryClauses: QueryClause...) -> [[NSString: AnyObject]]? {
+        
+        return self.queryAttributes(from, selectClause, queryClauses)
+    }
+    
+    internal func queryAttributes<T: NSManagedObject>(from: From<T>, _ selectClause: Select<NSDictionary>, _ queryClauses: [QueryClause]) -> [[NSString: AnyObject]]? {
+        
+        let fetchRequest = NSFetchRequest()
+        fetchRequest.entity = self.entityDescriptionForEntityClass(T)
+        fetchRequest.fetchLimit = 0
+        
+        selectClause.applyToFetchRequest(fetchRequest)
+        
+        for clause in queryClauses {
+            
+            clause.applyToFetchRequest(fetchRequest)
+        }
+        
+        var fetchResults: [AnyObject]?
+        var error: NSError?
+        self.performBlockAndWait {
+            
+            fetchResults = self.executeFetchRequest(fetchRequest, error: &error)
+        }
+        if let fetchResults = fetchResults {
+            
+            return Select<NSDictionary>.ReturnType.fromResultObjects(fetchResults)
+        }
+        
+        HardcoreData.handleError(
+            error ?? NSError(hardcoreDataErrorCode: .UnknownError),
+            "Failed executing fetch request.")
+        return nil
+    }
+}