I want the user to be able to specify the limit (the size of the amount returned) and offset (the first record returned / index returned) in my query method.
Here a
You probably can't to this with spring data jpa. If the offset is very small, you might just remove the top X statements from the query after retrieval.
Otherwise, you could define the page size to be the offset and start at page+1.
Suppose you are filtering and soring and paging at same time Below @Query will help you
@Query(value = "SELECT * FROM table WHERE firstname= ?1 or lastname= ?2 or age= ?3 or city= ?4 or "
+ " ORDER BY date DESC OFFSET ?8 ROWS FETCH NEXT ?9 ROWS ONLY" , nativeQuery = true)
List<JobVacancy> filterJobVacancyByParams(final String firstname, final String lastname,
final String age, final float city,int offset, int limit);
Below code should do it. I am using in my own project and tested for most cases.
usage:
Pageable pageable = new OffsetBasedPageRequest(offset, limit);
return this.dataServices.findAllInclusive(pageable);
and the source code:
import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.springframework.data.domain.AbstractPageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import java.io.Serializable;
/**
* Created by Ergin
**/
public class OffsetBasedPageRequest implements Pageable, Serializable {
private static final long serialVersionUID = -25822477129613575L;
private int limit;
private int offset;
private final Sort sort;
/**
* Creates a new {@link OffsetBasedPageRequest} with sort parameters applied.
*
* @param offset zero-based offset.
* @param limit the size of the elements to be returned.
* @param sort can be {@literal null}.
*/
public OffsetBasedPageRequest(int offset, int limit, Sort sort) {
if (offset < 0) {
throw new IllegalArgumentException("Offset index must not be less than zero!");
}
if (limit < 1) {
throw new IllegalArgumentException("Limit must not be less than one!");
}
this.limit = limit;
this.offset = offset;
this.sort = sort;
}
/**
* Creates a new {@link OffsetBasedPageRequest} with sort parameters applied.
*
* @param offset zero-based offset.
* @param limit the size of the elements to be returned.
* @param direction the direction of the {@link Sort} to be specified, can be {@literal null}.
* @param properties the properties to sort by, must not be {@literal null} or empty.
*/
public OffsetBasedPageRequest(int offset, int limit, Sort.Direction direction, String... properties) {
this(offset, limit, new Sort(direction, properties));
}
/**
* Creates a new {@link OffsetBasedPageRequest} with sort parameters applied.
*
* @param offset zero-based offset.
* @param limit the size of the elements to be returned.
*/
public OffsetBasedPageRequest(int offset, int limit) {
this(offset, limit, Sort.unsorted());
}
@Override
public int getPageNumber() {
return offset / limit;
}
@Override
public int getPageSize() {
return limit;
}
@Override
public int getOffset() {
return offset;
}
@Override
public Sort getSort() {
return sort;
}
@Override
public Pageable next() {
return new OffsetBasedPageRequest(getOffset() + getPageSize(), getPageSize(), getSort());
}
public OffsetBasedPageRequest previous() {
return hasPrevious() ? new OffsetBasedPageRequest(getOffset() - getPageSize(), getPageSize(), getSort()) : this;
}
@Override
public Pageable previousOrFirst() {
return hasPrevious() ? previous() : first();
}
@Override
public Pageable first() {
return new OffsetBasedPageRequest(0, getPageSize(), getSort());
}
@Override
public boolean hasPrevious() {
return offset > limit;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof OffsetBasedPageRequest)) return false;
OffsetBasedPageRequest that = (OffsetBasedPageRequest) o;
return new EqualsBuilder()
.append(limit, that.limit)
.append(offset, that.offset)
.append(sort, that.sort)
.isEquals();
}
@Override
public int hashCode() {
return new HashCodeBuilder(17, 37)
.append(limit)
.append(offset)
.append(sort)
.toHashCode();
}
@Override
public String toString() {
return new ToStringBuilder(this)
.append("limit", limit)
.append("offset", offset)
.append("sort", sort)
.toString();
}
}
Here you go:
public interface EmployeeRepository extends JpaRepository<Employee, Integer> {
@Query(value="SELECT e FROM Employee e WHERE e.name LIKE ?1 ORDER BY e.id offset ?2 limit ?3", nativeQuery = true)
public List<Employee> findByNameAndMore(String name, int offset, int limit);
}
Maybe the answer is kind of late, but I thought about the same thing. Compute the current page based on offset and limit. Well, it is not exactly the same because it "assumes" that the offset is a multiple of the limit, but maybe your application is suitable for this.
@Override
public List<Employee> findByName(String name, int offset, int limit) {
// limit != 0 ;)
int page = offset / limit;
return repository.findByName(name, new PageRequest(page, limit));
}
I would suggest a change of the architecture. Change your controller or whatever calls the service to initially give you page and limit if possible.
Try that:
public interface ContactRepository extends JpaRepository<Contact, Long>
{
@Query(value = "Select c.* from contacts c where c.username is not null order by c.id asc limit ?1, ?2 ", nativeQuery = true)
List<Contact> findContacts(int offset, int limit);
}