Я новичок в Hibernate / JPA. Я написал простой демонстрационный проект, чтобы начать понимать технологию. У меня такая проблема: все работает нормально, но фильтрует объект персистентности в поле первичного ключа таблицы. Любое другое поле можно использовать для фильтрации объектов без каких-либо проблем, даже если я использую несколько фильтров.
Это простой демонстрационный код, который я написал:
CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
CriteriaQuery<BaRoles> criteriaQuery = criteriaBuilder.createQuery(BaRoles.class);
Root<BaRoles> root = criteriaQuery.from(BaRoles.class);
criteriaQuery.select(root).where(criteriaBuilder.equal(root.get("rocode"), 78));
//criteriaQuery.select(root).where(criteriaBuilder.equal(root.get("rodescri"), "xxxxxxxx")); <-- Works fine
Query<BaRoles> query = session.createQuery(criteriaQuery);
List<BaRoles> roles = query.getResultList(); // <-- Returns nothing filtering rocode, correctly returns obejcts when filtering rodescri
for (int roleCounter = 0; roleCounter < roles.size(); roleCounter++) {
BaRoles role = (BaRoles) roles.get(roleCounter);
}
Это полная трассировка стека. :
java .lang.NullPointerException в org.hibernate.query.sqm. sql .internal.BasicValuedPathInterpretation.from (BasicValuedPathInterpretation. java: 50) в org.hibernate.query.sqm. sql .BaseSqmToSqlAstConverter.visitBasicValuedPath (BaseSqmToSqlAstConverter. java: 747) в org.hibernate.query.sqm. sql .BaseSqmToSqlAstConverter.visl. tree.domain.SqmBasicValuedSimplePath.accept (SqmBasicValuedSimplePath. java: 87) в org.hibernate.query.sqm. sql .BaseSqmToSqlAstConverter.visitComparisonPredicate. 15. sql .BaseSqmToSqlAstConverter.visitComparisonPredicate (BaseSqmToSqlAstConverter. java: 158) в org.hibernate.query.sqm.tree.predicate.S qmComparisonPredicate.accept (SqmComparisonPredicate. java: 67) в org.hibernate.query.sqm. sql .BaseSqmToSqlAstConverter.visitQuerySpe c (BaseSqmToSqlAstConery.q. 36) .4. 1028 * .internal.StandardSqmSelectTranslator.visitSelectStatement (StandardSqmSelectTranslator. java: 169) в org.hibernate.query.sqm. sql .internal.StandardSqmSelectTranslator.translate (StandardSqmquery). с .ConcreteSqmSelectQueryPlan.performList (ConcreteSqmSelectQueryPlan. java: 153) в org.hibernate.query.sqm.internal.QuerySqmImpl.doList (QuerySqmImpl. java: 413) в orgery.Query. . java: 1356) в org.hibernate.query.Query.g etResultList (Query. java: 136) на com.xxxx.xxxxx.mavenproject1.BaRoleManager.readWithFilter (BaRoleManager. java: 153) на com.xxxx.xxxxx.mavenproject1.BaRoleManager.main (BaRoleManager: *. 201)
И это класс BaRoles (генерируется с JPA):
import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.TableGenerator;
import javax.xml.bind.annotation.XmlRootElement;
@Entity
@Table(name = "ba_roles")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "BaRoles.findAll", query = "SELECT b FROM BaRoles b"),
@NamedQuery(name = "BaRoles.findByRocode", query = "SELECT b FROM BaRoles b WHERE b.rocode = :rocode"),
@NamedQuery(name = "BaRoles.findByRodescri", query = "SELECT b FROM BaRoles b WHERE b.rodescri = :rodescri"),
@NamedQuery(name = "BaRoles.findByCpccchk", query = "SELECT b FROM BaRoles b WHERE b.cpccchk = :cpccchk"),
@NamedQuery(name = "BaRoles.findByRodescriEng", query = "SELECT b FROM BaRoles b WHERE b.rodescriEng = :rodescriEng")
})
public class BaRoles implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
//@TableGenerator(name = "roleGenerator", table = "cpwarn", allocationSize = 1, pkColumnName = "tablecode", valueColumnName = "autonum", pkColumnValue = "prog\\ba_roles", schema="dbo", initialValue = 0)
@TableGenerator(name = "roleGenerator", table = "cpwarn", allocationSize = 1, pkColumnName = "tablecode", valueColumnName = "autonum", pkColumnValue = "prog\\ba_roles")
@GeneratedValue(strategy = GenerationType.TABLE, generator = "roleGenerator")
@Column(name = "ROCODE", updatable = false, nullable = false)
private Integer rocode;
@Column(name = "RODESCRI")
private String rodescri;
@Column(name = "cpccchk")
private String cpccchk;
@Column(name = "RODESCRI_ENG")
private String rodescriEng;
public BaRoles() {
}
public BaRoles(Integer rocode) {
this.rocode = rocode;
}
public Integer getRocode() {
return rocode;
}
public void setRocode(Integer rocode) {
this.rocode = rocode;
}
public String getRodescri() {
return rodescri;
}
public void setRodescri(String rodescri) {
this.rodescri = rodescri;
}
public String getCpccchk() {
return cpccchk;
}
public void setCpccchk(String cpccchk) {
this.cpccchk = cpccchk;
}
public String getRodescriEng() {
return rodescriEng;
}
public void setRodescriEng(String rodescriEng) {
this.rodescriEng = rodescriEng;
}
@Override
public int hashCode() {
int hash = 0;
hash += (rocode != null ? rocode.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof BaRoles)) {
return false;
}
BaRoles other = (BaRoles) object;
if ((this.rocode == null && other.rocode != null) || (this.rocode != null && !this.rocode.equals(other.rocode))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.xxxx.xxxx.mavenproject1.BaRoles[ rocode=" + rocode + " ]";
}
}