spring data jpa dynamic query which has IN clause - spring

Question

I want to create dynamic query in spring data jpa. Doing many search I can implement it, but I came across a problem when I add IN operator in where clause. I need to check id IN (longlist)
Here is my entity class
#Entity
#Table(name = "view_detail")
public class ViewDetailDom {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
private String name;
#Column(name = "user_id")
private Long userId;
private String description;
Here is specification builder class and specification class
public class ViewDetailSpecificationsBuilder {
private final List<SearchCriteria> params;
public ViewDetailSpecificationsBuilder() {
params = new ArrayList<SearchCriteria>();
}
public ViewDetailSpecificationsBuilder with(String key, Operation operation, Object value) {
params.add(new SearchCriteria(key, operation, value));
return this;
}
public Specification<ViewDetailDom> build() {
if (params.size() == 0) {
return null;
}
List<Specification<ViewDetailDom>> specs = new ArrayList<Specification<ViewDetailDom>>();
for (SearchCriteria param : params) {
specs.add(new ViewDetailSpecification(param));
}
Specification<ViewDetailDom> result = specs.get(0);
for (int i = 1; i < specs.size(); i++) {
result = Specifications.where(result).and(specs.get(i));
}
return result;
}
}
public class ViewDetailSpecification implements Specification<ViewDetailDom> {
private SearchCriteria criteria = new SearchCriteria();
public ViewDetailSpecification(SearchCriteria searchCriteria) {
this.criteria.setKey(searchCriteria.getKey());
this.criteria.setOperation(searchCriteria.getOperation());
this.criteria.setValue(searchCriteria.getValue());
}
#Override
public Predicate toPredicate(Root<ViewDetailDom> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
String value = criteria.getValue().toString().replaceAll(" ", "%");
if (criteria.getOperation() != null && criteria.getOperation() != Operation.DEFAULT) {
if (criteria.getOperation() == Operation.GREATHERTHANEQUALTO) {
return builder.greaterThanOrEqualTo(root.<String>get(criteria.getKey()), value);
} else if (criteria.getOperation() == Operation.LESSTHANEQUALTO) {
return builder.lessThanOrEqualTo(root.<String>get(criteria.getKey()), value);
} else if (criteria.getOperation() == Operation.EQUAL) {
return builder.equal(root.<String>get(criteria.getKey()), value);
} else if (criteria.getOperation() == Operation.IN) {
Path<Long> view = root.<Long>get(criteria.getKey());
return view.in(criteria.getValue());
}
} else {
if (root.get(criteria.getKey()).getJavaType() == String.class) {
return builder.like(builder.lower(root.<String>get(criteria.getKey())),
"%" + value.toLowerCase() + "%");
} else {
return builder.equal(root.get(criteria.getKey()), value);
}
}
return null;
}
}
This method creates specification builder:
public ViewDetailSpecificationsBuilder createSearchSpecifications(ViewSearch view) {
ViewDetailSpecificationsBuilder builder = new ViewDetailSpecificationsBuilder();
if (StringUtils.isNotBlank(view.getName())) {
builder.with("name", Operation.DEFAULT, view.getName());
}
if (StringUtils.isNotBlank(view.getDescription())) {
builder.with("description", Operation.DEFAULT, view.getDescription());
}
return builder;
}
And finally I do this:
ViewDetailSpecificationsBuilder builder = createSearchSpecifications(view);
builder.with("userId", Operation.DEFAULT, userSessionHelper.getUserId());
builder.with("id", Operation.IN, viewids);
Specification<ViewDetailDom> spec = builder.build();
viewDetailDao.findAll(spec);
But I am getting following error:
"Unaware how to convert value [[5, 7, 8] : java.util.ArrayList] to requested type [java.lang.Long]; nested exception is java.lang.IllegalArgumentException: Unaware how to convert value [[5, 7, 8] : java.util.ArrayList] to requested type [java.lang.Long]"

Answer 1

I have resolved this problem in this way:
ViewDetailSpecification class:
if (criteria.getOperation() == Operation.IN) {
final List<Predicate> orPredicates = new ArrayList<Predicate>();
List<Long> viewIds = (List<Long>) criteria.getValue();
for (Long viewid : viewIds) {
orPredicates.add(builder.or(builder.equal(root.<String>get(criteria.getKey()), viewid)));
}
return builder.or(orPredicates.toArray(new Predicate[orPredicates.size()]));
}

Answer 2

In kotlin I have the same error, I change the ArrayList to Array, with this code:
fun values(): Array<String> {
val elems = arrayListOf<String>()
return elems.toTypedArray()
}
Try you convert ArrayList to array, for java see: make arrayList.toArray() return more specific types