jpa-spec | A JPA Query By Specification framework | Object-Relational Mapping library
kandi X-RAY | jpa-spec Summary
kandi X-RAY | jpa-spec Summary
A JPA Query By Specification framework.
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Top functions reviewed by kandi - BETA
- Answer a Predicate that only accepts from the values of the Root
- Gets the root from the specified property
- Gets property
- Converts from root to a Predicate
- Compares the given value to the given field and the given value
- Retrieves a Predicate from a Root Property
- Gets the predicate
- Converts from root to a Predicate
- Converts from root to predicate
- Builds a specification
- Builds a Predicate that evaluates to the lower bound property
- Gets the from from root to a Predicate
- Gets the greater than or equal to the from field
- Return a predicate that evaluates to true if the fields are in the tree
- Gets the greater than or equal to the given field
- Gets the less than or equal to from the given entity
jpa-spec Key Features
jpa-spec Examples and Code Snippets
Community Discussions
Trending Discussions on jpa-spec
QUESTION
I am using jdk 1.8. I am using JPA specification to pull up the records where each object is heavy weight and with large number of such object is leading to memory-out-of-space error/exception (heap exhausted). This whole path is working fine when there are only couple of hundred records. And that is the reason that I am looking for a way to pull up only a couple of fields ( instead of whole object ) with jpa-specification-query. And latter, we will pull up whole records as necessary where applicable. Here is the glimpse of my code :
This an example object(which is an hibernate entity):
...ANSWER
Answered 2021-May-18 at 02:19Is there a way to pull up object with sublist of fields when have to use other fields in specification?
apparently not yet. as you can read here https://stackoverflow.com/a/42049307/12854146
if you want you could use Criteria jpa to achieve what you need
QUESTION
To oversimplify the problem: we have a class/table Wine (table "wines") which has, among other attributes:
- name: String
- description: String
- origin: Origin
... where Origin is another class (with table "origins") with just region: String and country: String.
What I'm trying to make is a search method in my repository for the RestController to use.
The method declaration in the RestController is like this:
...ANSWER
Answered 2020-Aug-06 at 14:59If you find it difficult to understand Specifications, only have those two search parameters and assuming Wine entity has a @ManyToOne to Origin, you can do the following:
QUESTION
I am working on a Spring Boot - App that has multiple entities having some identical columns for filtering.
Currently, I have the same query defined in multiple repositories, so after doing some research, I've stumbled across an article about JPA - Specifications: https://spring.io/blog/2011/04/26/advanced-spring-data-jpa-specifications-and-querydsl/
So I made a generic class to build JPA-Specifications:
...ANSWER
Answered 2020-Jul-31 at 08:50I think the cleanest approach is to use inheritance, but in the specification creator, not the entities. So for example something like (didn't try if it compiles so it probably doesn't, but should give the idea):
QUESTION
I want to send this request http://localhost:8080/{url}?start=2020-04-20&end=2020-04-24&status=success&status=failed
In Transaction model
...ANSWER
Answered 2020-Apr-27 at 12:55Check if your dateFormat are correct to pattern of your value: yyyy-MM-dd :
DateFormat dateFormat = new SimpleDateFormat ("yyyy-MM-dd");
QUESTION
I want to build simple query like this:
...ANSWER
Answered 2020-Jan-21 at 21:35In case that anyone ever need this, i fixed this issue like in code below. Basically i had to figure out how to properly build criteria.
QUESTION
I wish to have subquery, which provides me filtering actors by name.
I have a rest controller's method, which returns list of actors as JSON from movie base on movieId. I try to add filters as specification, but I have no idea how to write proper query. Base on "Spring Data JPA Specification for a ManyToMany Unidirectional Relationship" I found solution for subquery, which returns me all actors to proper movie base on movieId. Now I try to write this query.
Actor entity
...ANSWER
Answered 2019-Jul-18 at 14:35Ok I found,
My solution:
RestController
QUESTION
I'm currently trying to modify, (via a Spring filter) some of the request variables being posted into a form.
Reason being, I would like to implement better phone number validation, and better control how telephone numbers are formatted. For that part of the puzzle, I intend to use Google's Lib phone number in my model so like so:
...ANSWER
Answered 2018-Jun-09 at 13:34AFAIK you cannot modify your request parameter directly. You need a HttpServletRequestWrapper to provide custom getter to your parameter:
QUESTION
When I'm trying to search enum by his name with Specification in my DB using Spring @Repository, I'm getting the following exception:
ANSWER
Answered 2018-May-07 at 14:16public class Main {
enum Hello {
HELLO
}
public static void main(String[] args) {
Hello hello = Hello.HELLO;
System.out.println(hello.toString().equals("HELLO")); //true
System.out.println("HELLO".equals(hello.toString())); //true
System.out.println(hello.toString() == "HELLO"); //true
System.out.println(hello.equals("HELLO")); //false
System.out.println("HELLO".equals(hello)); //false
// System.out.println(hello == "HELLO"); //incompatible types
}
}
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install jpa-spec
You can use jpa-spec like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the jpa-spec component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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