i have 2 classes, the Person class that have a ManyToOne relationship with Address class. When i trying to get the persons, the address object have null elements inside, why happens this? the lazy configuration dont works? I can save a Person Object with the Address in cascade.
Here is my code:
Person class:
public class Person implements java.io.Serializable {
private int idPerson;
private String name;
private String surname;
private String dni;
private Date dateBirth;
private String cellPhone;
private String landPhone;
private String email;
private String discr;
private Address address ;
public Person() {
}
// getters and setters
}
My Address class:
public class Address implements java.io.Serializable {
private int idAddress;
private City city;
private String street;
private String number;
private Integer apartament;
private int level;
public Address() {
}
//getters an setters
}
My two mapping files:
<hibernate-mapping>
<class name="com.efix.model.enterprise.Address" table="address" schema="public">
<id name="idAddress" type="int">
<column name="id_address" />
<generator class="assigned" />
</id>
<many-to-one name="city" class="com.efix.model.enterprise.City" cascade="all" lazy="false">
<column name="id_city" not-null="true" />
</many-to-one>
<property name="street" type="string">
<column name="street" length="60" not-null="true" />
</property>
<property name="number" type="string">
<column name="number" length="6" />
</property>
<property name="apartament" type="java.lang.Integer">
<column name="apartament" />
</property>
<property name="level" type="int">
<column name="level" not-null="true" />
</property>
</class>
</hibernate-mapping>
Above is the address maping and this is my peopel mapping:
<hibernate-mapping>
<class name="com.efix.model.enterprise.Person" table="person" schema="public">
<id name="idPerson" type="int">
<column name="id_person" />
<generator class="identity" />
</id>
<discriminator column="discr" type="string"/>
<property name="name" type="string">
<column name="name" length="40" not-null="true" />
</property>
<property name="surname" type="string">
<column name="surname" length="40" not-null="true" />
</property>
<property name="dni" type="string">
<column name="dni" length="40" />
</property>
<property name="dateBirth" type="date">
<column name="date_birth" length="13" />
</property>
<property name="cellPhone" type="string">
<column name="cell_phone" length="20"/>
</property>
<property name="landPhone" type="string">
<column name="land_phone" length="20"/>
</property>
<property name="email" type="string">
<column name="email" length="25" />
</property>
<many-to-one class="com.efix.model.enterprise.Address" name="address">
<column name="id_address" not-null="true"/>
</many-to-one>
<!-- Subclase Empleado -->
<subclass name="com.efix.model.enterprise.Employee" discriminator-value="Employee">
<property name="admissionDate" type="date">
<column name="admission_date" length="13" />
</property>
<property name="outDate" type="date">
<column name="out_date" length="13" />
</property>
<property name="position" type="string">
<column name="position" length="40" />
</property>
</subclass>
<!-- Sublcase cliente -->
<subclass name="com.efix.model.enterprise.Client" discriminator-value="Client">
<property name="notes" type="string">
<column name="notes" />
</property>
</subclass>
</class>
</hibernate-mapping>
My NullPointerException throws in this block of code:
ClientServiceImpl serviceImpl = new ClientServiceImpl();
for (Client cli : serviceImpl.findAll()) {
System.out.println(cli.getAddress().getNumber());
Thanks for yours reply!! My error was in a expression inside a . I was references to a non existed property!!
Related
i have an hibernate entity called user.I want to get the list of users who are between two dates a date interval. Example, I have a date D1 and I want to know the people hired between my hiDate and my depDate.
Here is the mapping of the hibernate file of my user entity
<class name="com.bam.model.User" table="USER">
<composite-id class="com.bam.model.UserId" name="id">
<key-property name="idUser" type="java.lang.String">
<column name="ID_USER" not-null="true" precision="0" scale="30" sql-type="varchar"/>
</key-property>
<key-property name="idCompany" type="java.lang.String">
<column name="ID_COMPANY" not-null="true" precision="0" scale="30" sql-type="varchar"/>
</key-property>
</composite-id>
<property name="gender" type="java.lang.String">
<column name="GENDER" not-null="false" precision="0" scale="4" sql-type="varchar"/>
</property>
<property name="firstname" type="java.lang.String">
<column name="FIRSTNAME" not-null="false" precision="0" scale="100" sql-type="varchar"/>
</property>
<property name="lastname" type="java.lang.String">
<column name="LASTNAME" not-null="false" precision="0" scale="100" sql-type="varchar"/>
</property>
</class>
Here is also the class of my user entity.
#XmlRootElement(name = "user")
public class User implements Serializable {
#XmlElement(name = "id")
private UserId id;
#XmlElement(name = "gender")
private String gender;
#XmlElement(name = "firstName")
private String firstname;
#XmlElement(name = "lastName")
private String lastname;
}
The query that I will write with the hql language is this one :
Query query = session.createQuery("SELECT * FROM USER us oh WHERE DATE_FORMAT(us.HI_DATE,'%dd-%mm-%YYYY') <= :from_date <= DATE_FORMAT(us.DEP_DATE'%dd-%mm-%YYYY') ");
query.setParameter( "from_date ", from_date );
but it doesn't work, any idea ?
you can try this.
Do you need to format the dates?
Query query = session.createQuery("FROM USER us WHERE :from_date between us.hiDate and us.depDate");
query.setParameter( "from_date ", from_date );
I'm having a hard time to figure this thing out. I have managed to create this type of mapping using annotations, but XML configuration is giving me headache for hours. These are my POJOs (getters ans setters are omitted):
public class Stock implements Serializable {
private static final long serialVersionUID = 8724254922362918916L;
private int stockId;
private String stockCode;
private String stockName;
private Set<StockCategory> stockCategories;
}
public class Category implements Serializable {
private static final long serialVersionUID = -3719693878172387644L;
private int categoryId;
private String name;
private String desc;
private Set<StockCategory> stockCategories;
}
public final class StockCategoryId implements Serializable {
private static final long serialVersionUID = -6894097209574496516L;
private int stockId;
private int categoryId;
}
public class StockCategory implements Serializable {
private static final long serialVersionUID = 691323506089277225L;
private StockCategoryId stockCategoryId;
private Stock stock;
private Category category;
private Date createdDate;
private String createdBy;
}
And those are hibernate mapping files:
<class name="com.rmilovic.hibernate.examples.models.Stock" table="STOCK">
<id name="stockId" column="STOCK_ID" type="int">
<generator class="identity" />
</id>
<property name="stockCode" type="string">
<column name="STOCK_CODE" length="10" not-null="true" unique="true" />
</property>
<property name="stockName" type="string">
<column name="STOCK_NAME" length="10" not-null="true" unique="true" />
</property>
<set name="stockCategories" table="STOCK_CATEGORY" inverse="true"
lazy="true" fetch="select" cascade="all">
<key column="STOCK_ID" not-null="true" />
<one-to-many class="com.rmilovic.hibernate.examples.models.StockCategory" />
</set>
</class>
<class name="com.rmilovic.hibernate.examples.models.Category" table="CATEGORY">
<id name="categoryId" column="CATEGORY_ID" type="int">
<generator class="identity" />
</id>
<property name="name" type="string">
<column name="NAME" not-null="true" length="10" unique="true" />
</property>
<property name="desc" type="string">
<column name="DESC" not-null="true" />
</property>
<set name="stockCategories" table="STOCK_CATEGORY" lazy="true" inverse="true"
fetch="select" cascade="all">
<key column="CATEGORY_ID" not-null="true" />
<one-to-many class="com.rmilovic.hibernate.examples.models.StockCategory" />
</set>
</class>
<class name="com.rmilovic.hibernate.examples.models.StockCategory" table="STOCK_CATEGORY">
<composite-id name="stockCategoryId"
class="com.rmilovic.hibernate.examples.models.StockCategoryId">
<key-property name="stockId" type="int" column="STOCK_ID" />
<key-property name="categoryId" type="int" column="CATEGORY_ID" />
</composite-id>
<property name="createdDate" type="date">
<column name="CREATED_DATE" not-null="true" length="10" unique="true" />
</property>
<property name="createdBy" type="string">
<column name="CREATED_BY" not-null="true" length="10" unique="true" />
</property>
<many-to-one name="stock" column="STOCK_ID"
class="com.rmilovic.hibernate.examples.models.Stock"
insert="false" update="false" />
<many-to-one name="category" column="CATEGORY_ID"
class="com.rmilovic.hibernate.examples.models.Category"
insert="false" update="false" />
</class>
Schema seems to be good but I'm getting:
Exception in thread "main" org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.rmilovic.hibernate.examples.models.Category
when I'm trying to save data.
This is the code which saves data:
final Session session = HibernateUtilities.openSession();
session.beginTransaction();
final Stock stock = new Stock("BLA", "Test");
final Category category = new Category("consumer", "consumer company");
final StockCategory stockCategory = new StockCategory(new Date(), "me");
stockCategory.setCategory(category);
stockCategory.setStock(stock);
stock.getStockCategories().add(stockCategory);
category.getStockCategories().add(stockCategory);
session.save(stock);
session.getTransaction().commit();
HibernateUtilities.closeSession();
I have the following classes:
Guide class:
public abstract class Guide
{
private Long idGuide;
private String name;
private GuideContainer parent;
/** GETTERS & SETTERS*/
}
GuideContainer:
public class GuideContainer extends Guide
{
private Guide children;
/** GETTER & SETTERS */
}
GuideFile:
public class GuideFile extends Guide
{
private String uri;
/**GETTERS & SETTERS */
}
with the following mappings:
For Guide:
<hibernate-mapping>
<class name="Guide" table="guides" abstract="true">
<id name="idGuide" type="integer" column="idGuide">
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String" column="name" />
<discriminator column="type" type="java.lang.String" />
<many-to-one class="GuideContainer" fetch="join" name="parent">
<column name="parent" />
</many-to-one>
</class>
</hibernate-mapping>
GuideFile:
<hibernate-mapping>
<subclass extends="Guide" name="GuideFile" discriminator-value="file">
<property name="uri" type="java.lang.String" column="uri" />
</subclass>
</hibernate-mapping>
GuideContainer:
<hibernate-mapping>
<subclass extends="Guide" name="GuideContainer" discriminator-value="container">
<set fetch="select" inverse="true" lazy="true" name="children" sort="unsorted" table="children">
<key>
<column name="parent" not-null="false" />
</key>
<one-to-many class="Guide" />
</set>
</subclass>
</hibernate-mapping>
When I try to get all the guides with a given parent
Query query = getSession().createQuery("from Guide g where parent = :parent order by type").setParameter("parent", parent);
List<Guide> guides= query.list();
return guides;
I am getting the following exception:
IllegalArgumentException occurred calling getter of Guide.idGuide
And after that:
java.lang.IllegalArgumentException: object is not an instance of declaring class
What am I doing wrong?
Solved. Query should have been:
from Guide g where parent.idGuide = :parent order by type
I want to save an object to my sub-class ArticleZoning whose super class Zoning contain a List of Class zoneData which also contain a class ZoneCoordinate. When I save the object of my sub-class ArticleZoning it gives an exception.
org.hibernate.PropertyValueException: not-null property references a null or transient value: com.qait.cdl.eon.commons.domain.ZoneData._com.qait.cdl.eon.commons.domain.Zonning.zoneDatasBackref
at org.hibernate.engine.Nullability.checkNullability(Nullability.java:101)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:313)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210).....
Here is *Zonning hbm*Mapping file:-
<class name="Zonning" table="zoning">
<id name="id" column="id" type="long">
<generator class="native" />
</id>
<list name="zoneDatas" lazy="false" cascade="all-delete-orphan" >
<key column="zoning_id" not-null="true"/>
<list-index column="idx" base="1" />
<one-to-many class="com.qait.cdl.eon.commons.domain.ZoneData" />
</list>
<many-to-one class="com.qait.cdl.eon.commons.domain.MagazineIssue" unique="true" column="issue_id" name="issue"/>
<property name="pageNumber" column="article_on_pageNumber" type="string" not-null="true" />
<joined-subclass name="ArticleZoning" extends="Zonning" table="article_zoning">
<key column="article_id"/>
<property name="articleTitle" column="article_title" type="string" not-null="true" />
<property name="articleOrder" column="article_order" type="int" not-null="true" />
<property name="articleFileId" column="article_file_id" type="string" not-null="true" />
<property name="articleType" column="article_type">
<type name="org.hibernate.type.EnumType">
<param name="type">12</param>
<param name="enumClass">com.qait.cdl.eon.common.constants.ArticleType</param>
</type>
</property>
<property name="articleSubTitle" column="article_sub_title" type="string" not-null="true" />
<property name="articleGenre" column="article_genre">
<type name="org.hibernate.type.EnumType">
<param name="type">12</param>
<param name="enumClass">com.qait.cdl.eon.common.constants.Genre</param>
</type>
</property>
</joined-subclass>
<joined-subclass name="AdvertisementZoning" extends="Zonning" table="advertisement_zoning">
<key column="advertisement_id" />
<property name="adVendor" column="ad_vendor" type="string" not-null="true" />
<property name="vendorUrl" column="vendor_url" type="string" not-null="true" />
<property name="adProduct" column="ad_product" type="string" not-null="true" />
<list name="adKeywords" table="ad_keywords" lazy="false" cascade="all">
<key column="ad_keywords_id" />
<list-index base="0" column="idx"/>
<element column="keywords" type="string" />
</list>
</joined-subclass>
</class>
Here is ZoneData Hbm
<id name="id" column="id" type="long">
<generator class="native" />
</id>
<property name = "zoneOrder" column = "zone_order" type = "int" not-null="true"/>
<property name = "zoneFileId" column = "zone_file_id" type = "string" not-null="true"/>
<property name = "zoneShape" column = "zone_shape" type = "string" not-null="true" access="field"></property>
<many-to-one name="coordinates" column="coordinates_id" lazy="false" class="com.qait.cdl.eon.commons.domain.ZoneCoordinates"
unique="true" not-null="true" cascade="all-delete-orphan"/>
</class>
Here is ZoneCoordinate hbm
<class name="ZoneCoordinates" table="zone_coordinates">
<id name="id" column="id" type="long">
<generator class="native" />
</id>
<property name = "leftTopX" column = "left_top_x" type = "float" not-null="true" />
<property name = "leftTopY" column = "left_top_y" type = "float" not-null="true" />
<property name = "rightBottomX" column = "right_bottom_x" type = "float" not-null="true" />
<property name = "rightBottomY" column = "right_bottom_y" type = "float" not-null="true" />
</class>
Here is Zoning pojo
class Zoning{
private List<ZoneData> zoneDatas =new ArrayList<>();
private MagazineIssue issue;
private String pageNumber;
//getter and setter
}
Here is ZoneData POJO
class ZoneData{
private int zoneOrder;
private String zoneFileId ;
private ZoneCoordinates coordinates;
private final String zoneShape = "RECT";
//getter and setter
}
Here is ArticleZoning POJO
class ArticleZoning extends Zoning{
private String articleTitle;
private String articleOrder;
private ArticleType articleType;
private String articleFileId;
private String articleSubTitle;
private Genre articleGenre;
//getter and setter
}
Here is ZoneCoordinate POJO
class ZoneCoordinate{
private float leftTopX;
private float leftTopY;
private float rightBottomX;
private float rightBottomY;
//getter and setter
}
First, ArticleZoning POJO has articleOrder as String type. Your Zonning.hbm says articleOrder is of int type.
Secondly, as zoning table is unable to save, hence its foreign key is null.
I've got table in MySQL database with this structure:
And hibernate mapping for object PatientDAO here:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="cz.cvut.fit.genepi.models.PatientDAO" table="patient">
<id name="_id" type="int">
<column name="id" precision="6" scale="0" not-null="true" />
<generator class="assigned" />
</id>
<property name="_nin" type="long">
<column name="nin" length="20" not-null="false" />
</property>
<property name="_birthday" type="date">
<column name="birthday" length="7" not-null="true" />
</property>
<property name="_gender" type="string">
<column name="gender" length="10" not-null="true" />
</property>
<property name="_doctor_id" type="int">
<column name="doctor_id" precision="6" scale="0" not-null="false" />
</property>
<property name="_deleted" type="int">
<column name="deleted" precision="1" scale="0" not-null="false" />
</property>
<property name="_checked" type="int">
<column name="checked" precision="1" scale="0" not-null="false" />
</property>
<property name="_contact_id" type="int">
<column name="contact_id" precision="6" scale="0" not-null="false" />
</property>
<property name="_comment_id" type="int">
<column name="comment_id" precision="6" scale="0" not-null="false" />
</property>
</class>
</hibernate-mapping>
But when I'm trying to get some sample data from dtb and print them out, I get only 0. This happens for any possible property of Patient DAO. And for any id of searched patient.
I'm sure, that patient with id==0 is contained in that table.
findByID function:
public T findByID(Class<T> myClass, int id) {
Session hibernateSession = this.getSession();
T t = null;
t = (T) hibernateSession.get(myClass, id);
return t;
}
part of PatientDAO (without setters and getters):
public class PatientDAO implements java.io.Serializable {
/**
* generated serialVersionUID
*/
private static final long serialVersionUID = -8172690860460945951L;
private int _id;
private long _nin;
private Date _birthday;
private String _gender;
private int _doctor_id;
private int _deleted;
private int _checked;
public int get_checked() {
return _checked;
}
}
My personal tip is that I got there something wrong in my mapping, because for simplier objects it worked well. But I'm quite new to hibernate, so I can't figure out, what can be there wrong.. I'd be really glad if someone could help.
problem was in bad mapping... I actually dind't see, that nin should be varchar and I declared it as long