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Code Issues 95 Packages Projects Releases 10 Wiki Activity

testing some ways to make querying as elegant as possible

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This commit is contained in:
John Rommel Estropia
2014-12-13 10:06:16 +09:00
parent 8010daa161
commit 45a65d9262
12 changed files with 604 additions and 175 deletions
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66
HardcoreData/DataTransaction.swift
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@@ -50,7 +50,7 @@ public class DataTransaction {
public func create<T: NSManagedObject>(entity: T.Type) -> T {
HardcoreData.assert(self.transactionQueue.isCurrentExecutionContext() == true, "Attempted to create an NSManagedObject outside a transaction queue.")
HardcoreData.assert(!self.isTransactionCommited, "Attempted to create an NSManagedObject from an already commited DataTransaction.")
HardcoreData.assert(!self.isCommitted, "Attempted to create an NSManagedObject from an already committed DataTransaction.")
return T.createInContext(self.context)
}
@@ -63,7 +63,7 @@ public class DataTransaction {
public func update<T: NSManagedObject>(object: T) -> T? {
HardcoreData.assert(self.transactionQueue.isCurrentExecutionContext() == true, "Attempted to update an NSManagedObject outside a transaction queue.")
HardcoreData.assert(!self.isTransactionCommited, "Attempted to update an NSManagedObject from an already commited DataTransaction.")
HardcoreData.assert(!self.isCommitted, "Attempted to update an NSManagedObject from an already committed DataTransaction.")
return object.inContext(self.context)
}
@@ -75,12 +75,22 @@ public class DataTransaction {
public func delete(object: NSManagedObject) {
HardcoreData.assert(self.transactionQueue.isCurrentExecutionContext() == true, "Attempted to delete an NSManagedObject outside a transaction queue.")
HardcoreData.assert(!self.isTransactionCommited, "Attempted to delete an NSManagedObject from an already commited DataTransaction.")
HardcoreData.assert(!self.isCommitted, "Attempted to delete an NSManagedObject from an already committed DataTransaction.")
object.deleteFromContext()
}
// MARK: Saving changes
/**
Rolls back the transaction by resetting the NSManagedObjectContext. Note that after calling this method, all NSManagedObjects fetched within the transaction will become invalid.
*/
public func rollback() {
HardcoreData.assert(self.transactionQueue.isCurrentExecutionContext() == true, "Attempted to rollback a DataTransaction outside a transaction queue.")
HardcoreData.assert(!self.isCommitted, "Attempted to rollback an already committed DataTransaction.")
self.context.reset()
}
/**
Saves the transaction changes asynchronously. Note that this method should not be used after either the commit(_:) or commitAndWait() method was already called once.
@@ -89,9 +99,9 @@ public class DataTransaction {
public func commit(completion: (result: SaveResult) -> ()) {
HardcoreData.assert(self.transactionQueue.isCurrentExecutionContext() == true, "Attempted to commit a DataTransaction outside a transaction queue.")
HardcoreData.assert(!self.isTransactionCommited, "Attempted to commit a DataTransaction more than once.")
HardcoreData.assert(!self.isCommitted, "Attempted to commit a DataTransaction more than once.")
self.isTransactionCommited = true
self.isCommitted = true
self.context.saveAsynchronouslyWithCompletion { [weak self] (result) -> () in
self?.result = result
@@ -107,9 +117,9 @@ public class DataTransaction {
public func commitAndWait() -> SaveResult {
HardcoreData.assert(self.transactionQueue.isCurrentExecutionContext() == true, "Attempted to commit a DataTransaction outside a transaction queue.")
HardcoreData.assert(!self.isTransactionCommited, "Attempted to commit a DataTransaction more than once.")
HardcoreData.assert(!self.isCommitted, "Attempted to commit a DataTransaction more than once.")
self.isTransactionCommited = true
self.isCommitted = true
let result = self.context.saveSynchronously()
self.result = result
return result
@@ -131,7 +141,7 @@ public class DataTransaction {
self.transactionQueue.barrierAsync {
self.closure(transaction: self)
if !self.isTransactionCommited {
if !self.isCommitted {
self.commit { (result) -> () in }
}
@@ -143,7 +153,7 @@ public class DataTransaction {
self.transactionQueue.barrierSync {
self.closure(transaction: self)
if !self.isTransactionCommited {
if !self.isCommitted {
self.commitAndWait()
}
@@ -154,9 +164,45 @@ public class DataTransaction {
// MARK: - Private
private var isTransactionCommited = false
private var isCommitted = false
private var result: SaveResult?
private let mainContext: NSManagedObjectContext
private let transactionQueue: GCDQueue
private let closure: (transaction: DataTransaction) -> ()
}
// MARK: - DataContextProvider
extension DataTransaction: Queryable {
public func findFirst<T: NSManagedObject>(entity: T.Type) -> T? {
return self.context.findFirst(entity)
}
public func findFirst<T: NSManagedObject>(query: Query<T>) -> T? {
return self.context.findFirst(query)
}
public func findAll<T: NSManagedObject>(entity: T.Type) -> [T]? {
return self.context.findAll(entity)
}
public func findAll<T: NSManagedObject>(query: Query<T>) -> [T]? {
return self.context.findAll(query)
}
public func count<T: NSManagedObject>(entity: T.Type) -> Int {
return self.context.count(entity)
}
public func count<T: NSManagedObject>(query: Query<T>) -> Int {
return self.context.count(query)
}
}