Here we go...
Database:
Code:
create table ORGANIZATION
(
ORGANIZATION_ID NUMBER not null,
NAME VARCHAR2(50) not null,
WORKING_TIME_SET_ID NUMBER
);
create table PROJECT
(
PROJECT_ID NUMBER not null,
NAME VARCHAR2(50) not null
);
create table PROJECT_ORGANIZATION
(
PROJECT_ID NUMBER not null,
ORGANIZATION_ID NUMBER not null,
WEIGHT NUMBER not null
);
create table WORKING_TIME_SET
(
WORKING_TIME_SET_ID NUMBER not null
);
create table WORKING_TIME
(
WORKING_TIME_SET_ID NUMBER not null,
WEEK_DAY NUMBER not null,
WORKING_TIME_START DATE not null,
WORKING_TIME_END DATE not null,
IS_WORKING_DAY NUMBER(1) not null
);
Database data:
Code:
insert into project (project_id, name) values (1, 'test');
insert into project_organization (project_id, organization_id, weight) values (1, 100, 0);
insert into organization (organization_id, name, working_time_set_id) values (100, 'org', 200);
insert into working_time_set (working_time_set_id) values (200);
insert into working_time (working_time_set_id, week_day, working_time_start, working_time_end, is_working_day) values (200, 0, sysdate, sysdate, 1);
Mapping:
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="Organization"
table="ORGANIZATION"
proxy="Organization">
<id name="id" column="ORGANIZATION_ID" type="long">
<generator class="sequence">
<param name="sequence">SEQ_ORGANIZATION</param>
</generator>
</id>
<property name="name" column="NAME" type="string" />
<many-to-one name="workingTimeSet"
column="WORKING_TIME_SET_ID"
class="WorkingTimeSet"
cascade="all"
/>
</class>
<class name="Project"
table="PROJECT"
proxy="Project">
<id name="id" column="PROJECT_ID" type="long">
<generator class="sequence">
<param name="sequence">SEQ_PROJECT</param>
</generator>
</id>
<property name="name" column="NAME" type="string" />
<set name="projectOrganizations" lazy="true" table="PROJECT_ORGANIZATION">
<key column="PROJECT_ID"/>
<composite-element class="ProjectOrganization">
<property name="weight" type="double" />
<many-to-one
name="organization"
class="Organization"
column="ORGANIZATION_ID"
not-null="true"
/>
</composite-element>
</set>
</class>
<class name="WorkingTimeSet" table="WORKING_TIME_SET">
<id name="id" column="WORKING_TIME_SET_ID" type="long">
<generator class="sequence">
<param name="sequence">SEQ_WORKING_TIME_SET</param>
</generator>
</id>
<array name="times" table="WORKING_TIME" cascade="all">
<key column="WORKING_TIME_SET_ID" />
<index column = "WEEK_DAY" />
<composite-element class="WorkingTime">
<property name="start" column="WORKING_TIME_START" type="time" />
<property name="end" column="WORKING_TIME_END" type="time" />
<property name="isWorking" column="IS_WORKING_DAY" type="boolean" />
</composite-element>
</array>
</class>
</hibernate-mapping>
Classes:
Code:
public class Organization
{
private Long id;
private String name;
private WorkingTimeSet workingTimeSet;
public int hashCode()
{
return (id == null) ? 0 : id.hashCode();
}
public boolean equals(Object object)
{
if (object == this)
return true;
else if ( !(object instanceof Organization) )
return false;
Organization other = (Organization) object;
return id == null ? (other.getId() == null) : id.equals(other.getId());
}
public Long getId()
{
return id;
}
public void setId(Long id)
{
this.id = id;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public WorkingTimeSet getWorkingTimeSet()
{
return workingTimeSet;
}
public void setWorkingTimeSet(WorkingTimeSet workingTimeSet)
{
this.workingTimeSet = workingTimeSet;
}
}
import java.util.Set;
public class Project
{
private Long id;
private String name;
private Set projectOrganizations;
public int hashCode()
{
return (id == null) ? 0 : id.hashCode();
}
public boolean equals(Object object)
{
if (object == this)
return true;
else if ( !(object instanceof Project) )
return false;
Project other = (Project) object;
return (id == null) ? (other.getId() == null) : id.equals(other.getId());
}
public Long getId()
{
return id;
}
public void setId(Long id)
{
this.id = id;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public Set getProjectOrganizations()
{
return projectOrganizations;
}
public void setProjectOrganizations(Set projectOrganizations)
{
this.projectOrganizations = projectOrganizations;
}
}
public class ProjectOrganization
{
private Organization organization;
private double weight;
public int hashCode()
{
return (organization == null) ? 0 : organization.hashCode();
}
public boolean equals(Object object)
{
if (object == this)
return true;
else if ( !(object instanceof ProjectOrganization) )
return false;
ProjectOrganization other = (ProjectOrganization) object;
return (organization == null) ? (other.getOrganization() == null) : organization.equals(other.getOrganization());
}
public Organization getOrganization()
{
return organization;
}
public void setOrganization(Organization organization)
{
this.organization = organization;
}
public double getWeight()
{
return weight;
}
public void setWeight(double weight)
{
this.weight = weight;
}
}
import java.util.Date;
public class WorkingTime
{
private Date start;
private Date end;
private boolean isWorking;
public WorkingTime(){}
public Date getEnd()
{
return end;
}
public void setEnd(Date end)
{
this.end = end;
}
public Date getStart()
{
return start;
}
public void setStart(Date start)
{
this.start = start;
}
public boolean getIsWorking()
{
return isWorking;
}
public void setIsWorking(boolean working)
{
isWorking = working;
}
}
public class WorkingTimeSet
{
private Long id;
private WorkingTime[] times;
public int hashCode()
{
return (id == null) ? 0 : id.hashCode();
}
public boolean equals(Object object)
{
if (object == this)
return true;
else if ( !(object instanceof WorkingTimeSet) )
return false;
WorkingTimeSet other = (WorkingTimeSet) object;
return (id == null) ? (other.getId() == null) : id.equals(other.getId());
}
public Long getId()
{
return id;
}
public void setId(Long id)
{
this.id = id;
}
public WorkingTime[] getTimes()
{
return times;
}
public void setTimes(WorkingTime[] times)
{
this.times = times;
}
}
Code what runs this:
Code:
public class Test
{
public static void main(String[] args)
{
SessionFactory sessionFactory = null;
Configuration hibernateConfig = new Configuration();
try
{
hibernateConfig.configure();
sessionFactory = hibernateConfig.buildSessionFactory();
}
catch (HibernateException exception)
{
exception.printStackTrace(System.err);
System.exit(0);
}
Connection conn = null;
try
{
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@XXXXXXX:1521:XXXX", "XXXX", "XXXX");
}
catch (Exception exception)
{
exception.printStackTrace(System.err);
System.exit(0);
}
Session session = sessionFactory.openSession(conn);
try
{
Project project = (Project) session.load(Project.class, new Long(1));
project.getProjectOrganizations().iterator();
}
catch (HibernateException exception)
{
exception.printStackTrace(System.err);
System.exit(0);
}
}
}
And what we finally get:
Code:
Hibernate: select project0_.PROJECT_ID as PROJECT_ID0_, project0_.NAME as NAME0_ from PROJECT project0_ where project0_.PROJECT_ID=?
Hibernate: select project_0_.weight as weight__, project_0_.ORGANIZATION_ID as ORGANIZA3___, project_0_.PROJECT_ID as PROJECT_ID__ from PROJECT_ORGANIZATION project_0_ where project_0_.PROJECT_ID=?
Hibernate: select workingt1_.WORKING_TIME_SET_ID as WORKING_TIME_SET_ID0_, organiza0_.ORGANIZATION_ID as ORGANIZATION_ID1_, organiza0_.NAME as NAME1_, organiza0_.WORKING_TIME_SET_ID as WORKING_3_1_ from ORGANIZATION organiza0_, WORKING_TIME_SET workingt1_ where organiza0_.ORGANIZATION_ID=? and organiza0_.WORKING_TIME_SET_ID=workingt1_.WORKING_TIME_SET_ID(+)
Hibernate: select working_0_.WORKING_TIME_START as WORKING_2___, working_0_.WORKING_TIME_END as WORKING_3___, working_0_.IS_WORKING_DAY as IS_WORKI4___, working_0_.WORKING_TIME_SET_ID as WORKING_1___, working_0_.WEEK_DAY as WEEK_DAY__ from WORKING_TIME working_0_ where working_0_.WORKING_TIME_SET_ID=?
[ERROR] PersistentCollection - -Failed to lazily initialize a collection <java.util.ConcurrentModificationException>java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.remove(HashMap.java:755)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3122)
at net.sf.hibernate.loader.Loader.doResultSet(Loader.java:219)
at net.sf.hibernate.loader.Loader.doFind(Loader.java:111)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:722)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:705)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:69)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:306)
at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:3267)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:199)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:69)
at net.sf.hibernate.collection.Set.iterator(Set.java:131)
at Test.main(Test.java:51)
net.sf.hibernate.LazyInitializationException: Failed to lazily initialize a collection
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:205)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:69)
at net.sf.hibernate.collection.Set.iterator(Set.java:131)
at Test.main(Test.java:51)
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.remove(HashMap.java:755)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3122)
at net.sf.hibernate.loader.Loader.doResultSet(Loader.java:219)
at net.sf.hibernate.loader.Loader.doFind(Loader.java:111)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:722)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:705)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:69)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:306)
at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:3267)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:199)
... 3 more
Exception in thread "main" Process terminated with exit code 1
What do you think?
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