Try to stick to immutable objects - Immutable objects are straightforward to create as materializing an object is then a matter of calling its constructor only.Īlso, this avoids your domain objects to be littered with setter methods that allow client code to manipulate the objects state. The core idea here is to use factory methods instead of additional constructors to avoid the need for constructor disambiguation through defaulting of properties is handled within the factory method. The class exposes a factory method and a constructor for object creation. The remarks properties are mutable and populated by setting the comment field directly or by invoking the setter method for The comment property is mutable is populated by setting its field directly. With the design shown, the database value will trump the defaulting as Spring Data uses the only declared constructor.Įven if the intent is that the calculation should be preferred, it’s important that this constructor also takes age as parameter (to potentially ignore it)Īs otherwise the property population step will attempt to set the age field and fail due to it being immutable and no wither being present. The age property is an immutable but derived one from the birthday property. The firstname and lastname properties are ordinary immutable properties potentially exposed through getters. The same pattern is usually applied for other properties that are store managed but might have to be changed for persistence operations. The original Person instance stays unchanged as a new one is created. when an instance is inserted into the datastore and an identifier has been generated. The class exposes a withId(…) method that’s used to set the identifier, e.g. The identifier property is final but set to null in the constructor. Public MovieController(MovieRepository movieRepository), produces = MediaType.TEXT_EVENT_STREAM_VALUE) Private final MovieRepository movieRepository How do I use Spring Expression Language in custom queries? How do I specify parameters in custom queries? Do I have to create repositories for each domain class? Do I need to use Neo4j specific annotations? Do I need specific configuration so that transactions work seamless with a Neo4j Causal Cluster? Neo4j 4.0 supports multiple databases - How can I use them? Custom Implementations for Spring Data Repositories
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |