I went through the documentation here on fetching records into mutable pojo in Jooq.
It says that columns are mapped to the best matching constructor, attributes or setters.
Can anyone share more information what does best matching attributes or setter means?
How does it map the column when I am not using JPA annotation and my pojo has multiple attributes with same datatype?
Does it consider the column name or column ordering to map with attribute in pojo with same ordering or attribute name?
When transferring object into pojo, does it create the object of Record as well and then convert it into pojo or it creates directly pojo?
Thanks in advance!!
It is all explained in the DefaultRecordMapper Javadoc. The section that seems relevant to you is this (from jOOQ version 3.11):
If a default constructor is available and if there are no JPA Column annotations, or jOOQ can't find the javax.persistence API on the classpath, jOOQ will map Record values by naming convention:
If Field.getName() is MY_field (case-sensitive!), then this field's value will be set on all of these (regardless of visibility):
Single-argument instance method MY_field(...)
Single-argument instance method myField(...)
Single-argument instance method setMY_field(...)
Single-argument instance method setMyField(...)
Non-final instance member field MY_field
Non-final instance member field myField
Related
I'm mapping jOOQ results into POJOs.
I'd like to avoid having columns of the result not being mapped because of a typo/mismatch between field name and column name.
Is there a way to configure jOOQ to verify each field of the POJO is properly set ?
This cannot be done out of the box, but you can implement a custom RecordMapperProvider that implements the desired checks:
https://www.jooq.org/doc/latest/manual/sql-execution/fetching/pojos-with-recordmapper-provider
I've used Automapper before to map DataTable objects to a DTO object like this:
AutoMapper.CreateMap<IDataReader, MyDTO>();
Now I've run into a case where I have three DataTable objects that map to one DTO object. I can't use the simple case above because I have three sources with the same type.
Is there a way to specify some additional information, like the table name, to determine the correct mapping?
Is there a bulit-in way to obtain an entity name from the class object of an NSManagedObjectSubclass? I know that this can be readily determined from an instance of a subclass, but I want to ask the class itself. I can write a class function, but I would rather do this introspectively.
You can do it now by executing NSManagedObject.entity().name where NSManagedObject() is your subclass.
Check out mogenerator if you haven't already.
http://raptureinvenice.com/getting-started-with-mogenerator/
It adds a lot of missing features to core data. In particular it keeps you from having to regenerate your entity classes.
You could iterate thru the key values of the entities in the context:
[managedObjectContext registeredObjects];
I have some problems with CMIS query language. I want to get all documents (table no important), which have some property. So I wrote Select my_property from cmis:document.
Unfortunately I get answer: 0 documents. But when I alter query to Select my_property from my_table. I get different answer.
Could you tell me why?
The reason is that the spec does not provide for it. Here is what the spec says about the "relational view projection" (source):
In each Virtual Table, a Virtual Column is implicitly defined for each
property defined in the Object-Type Definition AND for all properties
defined on ANY ancestor-type of the Object-Type but NOT defined in the
Object-Type definition.
So a given object-type can be queried for properties of ancestor types, but the spec makes no provision for querying an object-type for properties of descendent types, which is what you are trying to do.
Jeff
we're using Automapper (http://automapper.codeplex.com/) to map between entities and dto's. We have a situation where one property on an entity corresponds to three different properties on the dto, and we need to write some custom logic to do the mapping. Anyone know how we can do that? (We need to map both ways, from entity and from dto).
I notice that AutoMapper supports custom resolvers to do custom mapping logic, but as far as I can tell from the documentation, they only allow you to map a single property to another single property.
Thx
You can create a custom type converter. It allows you to define a converter for an entire type, not just a single property.