Hello,
I have a Form object containing several FormItem objects in a property.
Here is the model:
Code:
public class Form implements java.io.Serializable {
private Integer id;
private int version;
private String name;
private Set<FormItem> formItems = new HashSet<FormItem>(0);
...
}
public class FormItem implements java.io.Serializable {
private Integer id;
private int version;
private String type;
private String name;
private Form form;
...
}
The test that fails:
Code:
@Test
public void testCollection() {
formItem0 = new FormItem();
formItem0.setName("name");
formItem0.setListOrder(2);
formItem0.setType("itemtype");
formItem0.setForm(form0);
formItem1 = new FormItem();
formItem1.setName("name");
formItem1.setListOrder(1);
formItem1.setType("itemtype");
formItem1.setForm(form0);
form0 = formDao.makePersistent(form0);
formItem0 = formItemDao.makePersistent(formItem0);
formItem1 = formItemDao.makePersistent(formItem1);
Form retrievedForm = formDao.findById(form0.getId(), false);
retrievedForm = formDao.findById(form0.getId(), false);
assertEquals(2, retrievedForm.getFormItems().size());
}
with the exception:
Quote:
FormDaoTest@80669d, testMethod = testCollection@FormDaoTest, testException = java.lang.NullPointerException]]
The test class constructor:
Code:
public FormDaoTest() {
form0 = new Form();
form0.setName(name0);
form1 = new Form();
form1.setName(name1);
form1.setImage(image);
}
Note that the other following test works fine:
Code:
@Test
public void testSaveAndRetrieve() {
form0 = formDao.makePersistent(form0);
assertNotNull(form0.getId());
assertNotSame(form0.hashCode(), 0L);
assertFalse(form0.toString().equals(""));
Form retrievedForm = formDao.findById(form0.getId(), false);
assertEquals(form0.hashCode(), retrievedForm.hashCode());
assertEquals(form0.getName(), retrievedForm.getName());
assertNotNull(retrievedForm.getId());
}
The hibernate mapping:
Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Apr 18, 2010 1:03:51 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
<class name="core.domain.Form" table="form" dynamic-insert="true" dynamic-update="true">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="identity" />
</id>
<version name="version" type="int">
<column name="version" not-null="true" />
</version>
<property name="name" type="string">
<column name="name" length="50" not-null="true" />
</property>
<property name="description" type="string">
<column name="description" not-null="false" />
</property>
<set name="formItems" inverse="true">
<key>
<column name="form_id" not-null="false" />
</key>
<one-to-many class="core.domain.FormItem" />
</set>
</class>
</hibernate-mapping>
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Apr 18, 2010 1:03:51 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
<class name="core.domain.FormItem" table="form_item" dynamic-insert="true" dynamic-update="true">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="identity" />
</id>
<version name="version" type="int">
<column name="version" not-null="true" />
</version>
<many-to-one name="form" class="core.domain.Form" cascade="all" fetch="select">
<column name="form_id" not-null="true" />
</many-to-one>
<property name="type" type="string">
<column name="type" length="50" not-null="true" />
</property>
<property name="name" type="string">
<column name="name" length="50" not-null="false" />
</property>
<property name="listOrder" type="int">
<column name="list_order" not-null="true" />
</property>
</class>
</hibernate-mapping>
The issue I have is with the test that tries to persist and retrieve the formItems proprety of the form object. This property is a collection, of objects of type FormItem.
I'm a bit lost when it comes to persisting and retrieving this collection...
Is my mapping okay ? Do I need to call these makePersistent dao methods ?
If anyone has a better understanding on how to persist a collection property, I'm all ears :-)
Thanks for any tips..
Stephane
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