Examples with QueryResultPersistentEntityCriteriaQuery io.micronaut.data.model.jpa.criteria.impl.QueryResultPersistentEntityCriteriaQuery used on opensource projects

Example 1 with QueryResultPersistentEntityCriteriaQuery

use of io.micronaut.data.model.jpa.criteria.impl.QueryResultPersistentEntityCriteriaQuery in project micronaut-data by micronaut-projects.

the class AbstractSpecificationInterceptor method preparedQueryForCriteria.

protected final <E, QR> PreparedQuery<E, QR> preparedQueryForCriteria(RepositoryMethodKey methodKey, MethodInvocationContext<T, R> context, Type type) {
    Class<Object> rootEntity = getRequiredRootEntity(context);
    Pageable pageable = Pageable.UNPAGED;
    for (Object param : context.getParameterValues()) {
        if (param instanceof Pageable) {
            pageable = (Pageable) param;
            break;
        }
    }
    QueryBuilder sqlQueryBuilder = sqlQueryBuilderForRepositories.computeIfAbsent(methodKey, repositoryMethodKey -> {
        Class<QueryBuilder> builder = context.getAnnotationMetadata().classValue(RepositoryConfiguration.class, "queryBuilder").orElseThrow(() -> new IllegalStateException("Cannot determine QueryBuilder"));
        BeanIntrospection<QueryBuilder> introspection = BeanIntrospection.getIntrospection(builder);
        if (introspection.getConstructorArguments().length == 1 && introspection.getConstructorArguments()[0].getType() == AnnotationMetadata.class) {
            return introspection.instantiate(context.getAnnotationMetadata());
        }
        return introspection.instantiate();
    });
    QueryResult queryResult;
    if (type == Type.COUNT || type == Type.FIND_ALL || type == Type.FIND_ONE || type == Type.FIND_PAGE) {
        QuerySpecification<Object> specification = getQuerySpecification(context);
        PersistentEntityCriteriaQuery<Object> criteriaQuery = criteriaBuilder.createQuery();
        Root<Object> root = criteriaQuery.from(rootEntity);
        if (specification != null) {
            Predicate predicate = specification.toPredicate(root, criteriaQuery, criteriaBuilder);
            if (predicate != null) {
                criteriaQuery.where(predicate);
            }
        }
        if (type == Type.FIND_ALL) {
            for (Object param : context.getParameterValues()) {
                if (param instanceof Sort && param != pageable) {
                    Sort sort = (Sort) param;
                    if (sort.isSorted()) {
                        criteriaQuery.orderBy(getOrders(sort, root, criteriaBuilder));
                        break;
                    }
                }
            }
        } else if (type == Type.COUNT) {
            criteriaQuery.select(criteriaBuilder.count(root));
        }
        queryResult = ((QueryResultPersistentEntityCriteriaQuery) criteriaQuery).buildQuery(sqlQueryBuilder);
    } else if (type == Type.DELETE_ALL) {
        DeleteSpecification<Object> specification = getDeleteSpecification(context);
        PersistentEntityCriteriaDelete<Object> criteriaDelete = criteriaBuilder.createCriteriaDelete(rootEntity);
        Root<Object> root = criteriaDelete.from(rootEntity);
        if (specification != null) {
            Predicate predicate = specification.toPredicate(root, criteriaDelete, criteriaBuilder);
            if (predicate != null) {
                criteriaDelete.where(predicate);
            }
        }
        queryResult = ((QueryResultPersistentEntityCriteriaQuery) criteriaDelete).buildQuery(sqlQueryBuilder);
    } else if (type == Type.UPDATE_ALL) {
        UpdateSpecification<Object> specification = getUpdateSpecification(context);
        PersistentEntityCriteriaUpdate<Object> criteriaUpdate = criteriaBuilder.createCriteriaUpdate(rootEntity);
        Root<Object> root = criteriaUpdate.from(rootEntity);
        if (specification != null) {
            Predicate predicate = specification.toPredicate(root, criteriaUpdate, criteriaBuilder);
            if (predicate != null) {
                criteriaUpdate.where(predicate);
            }
        }
        queryResult = ((QueryResultPersistentEntityCriteriaQuery) criteriaUpdate).buildQuery(sqlQueryBuilder);
    } else {
        throw new IllegalStateException("Unknown criteria type: " + type);
    }
    String query = queryResult.getQuery();
    String update = queryResult.getUpdate();
    List<io.micronaut.data.model.query.builder.QueryParameterBinding> parameterBindings = queryResult.getParameterBindings();
    List<QueryParameterBinding> queryParameters = new ArrayList<>(parameterBindings.size());
    for (io.micronaut.data.model.query.builder.QueryParameterBinding p : parameterBindings) {
        queryParameters.add(new QueryResultParameterBinding(p, queryParameters));
    }
    String[] queryParts = queryParameters.stream().anyMatch(QueryParameterBinding::isExpandable) ? queryResult.getQueryParts().toArray(new String[0]) : null;
    StoredQuery<E, QR> storedQuery;
    if (type == Type.COUNT) {
        storedQuery = (StoredQuery<E, QR>) storedQueryResolver.createCountStoredQuery(context.getExecutableMethod(), DataMethod.OperationType.COUNT, context.getName(), context.getAnnotationMetadata(), rootEntity, query, queryParts, queryParameters);
    } else if (type == Type.FIND_ALL) {
        storedQuery = storedQueryResolver.createStoredQuery(context.getExecutableMethod(), DataMethod.OperationType.QUERY, context.getName(), context.getAnnotationMetadata(), rootEntity, query, null, queryParts, queryParameters, !pageable.isUnpaged(), false);
    } else {
        DataMethod.OperationType operationType;
        switch(type) {
            case COUNT:
                operationType = DataMethod.OperationType.COUNT;
                break;
            case DELETE_ALL:
                operationType = DataMethod.OperationType.DELETE;
                break;
            case UPDATE_ALL:
                operationType = DataMethod.OperationType.UPDATE;
                break;
            case FIND_ALL:
            case FIND_ONE:
            case FIND_PAGE:
                operationType = DataMethod.OperationType.QUERY;
                break;
            default:
                throw new IllegalStateException("Unknown value: " + type);
        }
        storedQuery = storedQueryResolver.createStoredQuery(context.getExecutableMethod(), operationType, context.getName(), context.getAnnotationMetadata(), rootEntity, query, update, queryParts, queryParameters, false, true);
    }
    return preparedQueryResolver.resolveQuery(context, storedQuery, pageable);
}