Source link: https://github.com/AleksanderMielczarek/RealmRepository

RealmRepository

RealmRepository generates classes with access to Realm database. Library uses repository pattern, each generated class supports database operations on certain type. Project was inspired by Spring Data JPA.

Supported functions:

public interface Repository<T extends RealmObject, ID> {

long countSync();

@Nullable
  T findOneSync(ID id);

@Nullable
  T findFirstSync();

List<T> findAllSync();

boolean existsSync(ID id);

T saveSync(T entity);

List<T> saveSync(Iterable<T> entities);

void deleteSync(T entity);

void deleteSync(ID id);

void deleteSync(Iterable<T> entities);

void deleteAllSync();

Single<Long> count();

Single<T> findOne(ID id);

Single<T> findFirst();

Observable<T> findAll();

Single<Boolean> exists(ID id);

Single<T> save(T entity);

Single<List<T>> save(Iterable<T> entities);

Completable delete(T entity);

Completable delete(ID id);

Completable delete(Iterable<T> entities);

Completable deleteAll();

}

Usage

Add it in your root build.gradle:

buildscript {

 repositories {

...

mavenCentral()
  
}

  dependencies {

...

classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

  
}
 
}
  allprojects {
  repositories {

...

maven {
 url "https://jitpack.io" 
}

  
}
 
}

Add the dependency:

apply plugin: 'android-apt'  dependencies {

  ...
  compile 'com.github.AleksanderMielczarek.RealmRepository:realmrepository:0.2.1'
  apt 'com.github.AleksanderMielczarek.RealmRepository:realmrepository-processor:0.2.1' 
}

Example

Create model:

public class User extends RealmObject {

@PrimaryKey
  private String id;

private String name;
  private String surname;

 //getters and setters 
}

Create repository by extending generic Repository and annotate it with @RealmRepository. In this example User and String are types of model and primary key.

@RealmRepository public interface UserRepository extends Repository<User, String> {
 
}

Class with "Impl" suffix will be generated. In this example it will be UserRepositoryImpl. Usage in code:

RealmConfiguration realmConfiguration = new RealmConfiguration.Builder(context).build();
 Realm.setDefaultConfiguration(realmConfiguration);
 RealmRepositoryConfiguration repositoryConfiguration = RealmRepositoryConfiguration.getDefault();
 UserRepository userRepository = new UserRepositoryImpl(repositoryConfiguration);

By default repository will use Realm.getDefault() to obtain Realm instance but it can be changed:

RealmRepositoryConfiguration.builder()

.withRealmProvider(new RealmProvider() {

 @Override

 public Realm provideRealm() {

 
}

}
).build();

Library supports auto generation of primary keys. It uses UUID.randomUUID().toString() internally.

@RealmRepository(autoGenerateId = true) public interface UserRepository extends Repository<User, String> {
 
}

Support generation of abstract class. Following code will generate abstract class AbstractUserRepository.

@RealmRepository(abstractRepository = true) public interface UserRepository extends Repository<User, String> {
 
}

Limitations

every model must have field with @PrimaryKey
repository return object that is no longer attached to Realm
client has to set Scheduler, methods does not operate on particular Scheduler by default
auto generate of primary keys only for Strings

Note

In future releases API may change. Feel free to contribute.

Changelog

0.2.1 (2016-11-11)

update SDK
update Realm to 2.1.1
allow to generate abstract class from repository
rename get to find method

0.2.0 (2016-09-25)

add sync methods
fix bugs

License

Copyright 2016 Aleksander Mielczarek  Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License. You may obtain a copy of the License at
  http://www.apache.org/licenses/LICENSE-2.0  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Source link: https://github.com/AleksanderMielczarek/RealmRepository

Resources

RealmRepository