移動數據庫引擎Realm Java v2.0.0 發布

Realm 是一個跨平臺的移動數據庫引擎，可運行于手機、平板和可穿戴設備之上。于 2014 年 7 月發布，準確來說，它是專門為移動應用所設計的數據持久化解決方案之一。 Realm 可以輕松地移植到您的項目當中，并且絕大部分常用的功能（比如說插入、查詢等等）都可以用一行簡單的代碼輕松完成！ Realm 并不是對 Core Data 的簡單封裝，相反地， Realm 并不是基于 Core Data ，也不是基于 SQLite 所構建的。它擁有自己的數據庫存儲引擎，可以高效且快速地完成數據庫的構建操作。

更新日志

重大更改

• Files written by Realm 2.0 cannot be read by 1.x or earlier versions. Old files can still be opened.
• It is now required to call Realm.init(Context) before calling any other Realm API.
• Removed RealmConfiguration.Builder(Context), RealmConfiguration.Builder(Context, File) andRealmConfiguration.Builder(File) constructors.
• isValid() now always returns true instead of false for unmanaged RealmObject and RealmList. This puts it in line with the behaviour of the Cocoa and .NET API's (#3101).
• armeabi is not supported anymore.
• Added new RealmFileException.
  • IncompatibleLockFileException has been removed and replaced by RealmFileException with kindINCOMPATIBLE_LOCK_FILE.
  • RealmIOExcpetion has been removed and replaced by RealmFileException.
• RealmConfiguration.Builder.assetFile(Context, String) has been renamed toRealmConfiguration.Builder.assetFile(String).
• Object with primary key is now required to define it when the object is created. This means thatRealm.createObject(Class<E>) and DynamicRealm.createObject(String) now throws RealmException if they are used to create an object with a primary key field. Use Realm.createObject(Class<E>, Object) orDynamicRealm.createObject(String, Object) instead.
• Importing from JSON without the primary key field defined in the JSON object now throws IllegalArgumentException.
• Now Realm.beginTransaction(), Realm.executeTransaction() and Realm.waitForChange() throwRealmMigrationNeededException if a remote process introduces incompatible schema changes (#3409).
• The primary key value of an object can no longer be changed after the object was created. Instead a new object must be created and all fields copied over.
• Now Realm.createObject(Class) and Realm.createObject(Class,Object) take the values from the model's fields and default constructor. Creating objects through the DynamicRealm does not use these values (#777).
• When Realm.create*FromJson()s create a new RealmObject, now they take the default values defined by the field itself and its default constructor for those fields that are not defined in the JSON object.

增強功能

• Added realmObject.isManaged(), RealmObject.isManaged(obj) and RealmCollection.isManaged() (#3101).
• Added RealmConfiguration.Builder.directory(File).
• RealmLog has been moved to the public API. It is now possible to control which events Realm emit to Logcat. See theRealmLog class for more details.
• Typed RealmObjects can now continue to access their fields properly even though the schema was changed while the Realm was open (#3409).
• A RealmMigrationNeededException will be thrown with a cause to show the detailed message when a migration is needed and the migration block is not in the RealmConfiguration.

Bug 修復

• Fixed a lint error in proxy classes when the 'minSdkVersion' of user's project is smaller than 11 (#3356).
• Fixed a potential crash when there were lots of async queries waiting in the queue.
• Fixed a bug causing the Realm Transformer to not transform field access in the model's constructors (#3361).
• Fixed a bug causing a build failure when the Realm Transformer adds accessors to a model class that was already transformed in other project (#3469).
• Fixed a bug causing the NullPointerException when calling getters/setters in the model's constructors (#2536).

內部

• Moved JNI build to CMake.
• Updated Realm Core to 2.0.0.
• Updated ReLinker to 1.2.2.

下載

• Source code (zip)
• Source code (tar.gz)

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