Spring spec wrapper

Library for convenient reuse of joins when building queries using Spring Data Specifications

Inspired by this stackoverflow question: link to question

Maven:

<dependency>
    <groupId>ru.teadev</groupId>
    <artifactId>springspecwrapper</artifactId>
    <version>1.4.0</version>
</dependency>

Usage example:

public List<Task> findTasks(TaskFilterDto taskFilterDto) {

    Specification<Task> specification =
            where(specs.distinct(Task.class))

                    .and(specs.attributeEquals(
                            Task_.name,
                            taskFilterDto.getTaskName()))

                    .and(specs.attributeGreaterOrEquals(
                            single(join(Task_.employee)),
                            Employee_.salary,
                            taskFilterDto.getEmployeeSalaryGTE()))

                    .and(specs.attributeInOneOfRanges(
                            chain(join(Task_.employee), //the first created join will be reused
                                    join(Employee_.company)),
                            Company_.rating,
                            taskFilterDto.getCompanyRatingRanges()
                    ))

                    .and(specs.orderBy(
                            single(join(Task_.employee)), //the first created join will be reused
                            Employee_.birthDate,
                            Direction.ASC,
                            Nulls.LAST
                    ));

    return taskRepository.findAll(specification);
}

link to code