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added subGraph support

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This commit is contained in:
Joern Muehlencord
2019-11-17 15:09:05 +01:00
parent d5dc39e8ff
commit b4a28bb0b0
1 changed files with 28 additions and 11 deletions
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39
db/src/main/java/de/muehlencord/shared/db/StandardController.java
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@ -30,6 +30,7 @@ import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Order;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.apache.commons.lang3.ArrayUtils;
/**
*
@ -43,13 +44,19 @@ public class StandardController extends CommonAbstractController {
return em.find(clazz, id);
}
private <T> EntityGraph getEntityGraph(Class<T> clazz, String... subGraphItems) {
EntityGraph graph = this.em.createEntityGraph(clazz);
if (subGraphItems != null) {
for (String subGraphItem : subGraphItems) {
graph.addSubgraph(subGraphItem);
}
}
return graph;
}
@Lock(LockType.READ)
public <T extends Serializable> T find(Class<T> clazz, Object id, String... subGraphItems) {
EntityGraph graph = this.em.createEntityGraph(clazz);
for (String subGraphItem : subGraphItems) {
graph.addSubgraph(subGraphItem);
}
EntityGraph graph = getEntityGraph(clazz, subGraphItems);
Map hints = new HashMap<>();
hints.put("javax.persistence.loadgraph", graph);
@ -58,12 +65,12 @@ public class StandardController extends CommonAbstractController {
}
@Lock(LockType.READ)
public <T extends Serializable> List<T> find(Class<T> clazz, Map<String, Object> filters, List<String> orderFields) {
return find(clazz, filters, orderFields, 0, 0);
public <T extends Serializable> List<T> find(Class<T> clazz, Map<String, Object> filters, List<String> orderFields, String... subGraphItems) {
return find(clazz, filters, orderFields, 0, 0, subGraphItems);
}
@Lock(LockType.READ)
public <T extends Serializable> List<T> find(Class<T> clazz, Map<String, Object> filters, List<String> orderFields, int limit, int offset) {
public <T extends Serializable> List<T> find(Class<T> clazz, Map<String, Object> filters, List<String> orderFields, int limit, int offset, String... subGraphItems) {
final CriteriaBuilder cb = em.getCriteriaBuilder();
final CriteriaQuery<T> criteria = cb.createQuery(clazz);
@ -80,16 +87,19 @@ public class StandardController extends CommonAbstractController {
query.setMaxResults(limit);
}
EntityGraph graph = getEntityGraph(clazz, subGraphItems);
query.setHint("javax.persistence.loadgraph", graph);
return query.getResultList();
}
@Lock(LockType.READ)
public <T extends Serializable> List<T> find(Class<T> clazz, List<SearchFilter> filters, List<String> orderFields) throws ControllerException {
public <T extends Serializable> List<T> find(Class<T> clazz, List<SearchFilter> filters, List<String> orderFields, String... subGraphItems) throws ControllerException {
return find(clazz, filters, orderFields, 0, 0);
}
@Lock(LockType.READ)
public <T extends Serializable> List<T> find(Class<T> clazz, List<SearchFilter> filters, List<String> orderFields, int limit, int offset) throws ControllerException {
public <T extends Serializable> List<T> find(Class<T> clazz, List<SearchFilter> filters, List<String> orderFields, int limit, int offset, String... subGraphItems) throws ControllerException {
final CriteriaBuilder cb = em.getCriteriaBuilder();
final CriteriaQuery<T> criteria = cb.createQuery(clazz);
@ -99,12 +109,19 @@ public class StandardController extends CommonAbstractController {
criteria.where(filterCondition);
}
List<Order> orderList = new ArrayList<>();
orderFields.stream().forEachOrdered(field -> orderList.add(cb.asc(r.get(field))));
if (orderFields != null) {
orderFields.stream().forEachOrdered(field -> orderList.add(cb.asc(r.get(field))));
}
final TypedQuery<T> query = em.createQuery(criteria.orderBy(orderList)).setFirstResult(offset);
if (limit > 0) {
query.setMaxResults(limit);
}
if (!ArrayUtils.isEmpty(subGraphItems)) {
EntityGraph graph = getEntityGraph(clazz, subGraphItems);
query.setHint("javax.persistence.loadgraph", graph);
}
return query.getResultList();
}