[OPENJPA-414] Null id's in entyties while using Joined inheritance strategy

• Type: Bug
• Status: Open
• Priority: Blocker
• Resolution: Unresolved
• Affects Version/s: 1.0.0
• Assignee: Unassigned
• Reporter: Alexander Filipchik
• Created: 24/Oct/07 12:31
• Updated: 24/Oct/07 12:31

Description

I use inheritance in that way:
Parent class:
public class State implements Serializable {

private static final long serialVersionUID = -380133999593231293L;

private long stateId;

public State() {
}

public long getStateId()

{ return stateId; }

public void setStateId(long stateId)

{ this.stateId = stateId; }

@Override
public boolean equals(Object obj)

{ if (this == obj) return true; if (obj == null || getClass() != obj.getClass()) return false; State that = (State) obj; if (stateId!=that.stateId) return false; return true; }

@Override
public int hashCode()

{ int result; result = 31 * result + (int) (stateId ^ (stateId >>> 32)); }

}
<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm" version="1.0">
<package>xxx</package>
<entity class="State" name="State">
<table name="REG_STATUS" />
<inheritance strategy="JOINED"/>
<attributes>
<id name="stateId">
<column name="STATUS_ID"/>
</id>
</attributes>
</entity>

it has 1 child class:
public class RCategory extends State implements Serializable {

private static final long serialVersionUID = 2472570459234097349L;

private RCategory parentCategory;

private String title;

private String description;

private Set<RCategory> children;

private boolean containsChildren;

private Long id;

public RCategory() {
}

public RCategory(Long id, String title)

{ setId(id); this.title = title; this.containsChildren = false; }

public RCategory(Long id, String title, boolean containsChildren)

{ setId(id); this.title = title; this.containsChildren = containsChildren; }

public String getDescription()

{ return description; }

public void setDescription(String description)

{ this.description = description; }

public String getTitle()

{ return this.title; }

public Long getId()

{ return id; }

public void setId(Long id)

{ System.out.println("---------------------Setting id-------------------"); System.out.println(id); this.id = id; }

public void setTitle(String title)

{ this.title = title; }

public Set<RCategory> getChildren()

{ return children; }

public void setChildren(Set<RCategory> children)

{ this.children = children; }

public RCategory getParentCategory()

{ return parentCategory; }

public void setParentCategory(RCategory parentCategory)

{ this.parentCategory = parentCategory; }

public boolean isContainsChildren()

{ return containsChildren; }

public void setContainsChildren(boolean containsChildren)

{ this.containsChildren = containsChildren; }

public boolean equals(Object o)

{ if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; if (!super.equals(o)) return false; RCategory rCategory = (RCategory) o; if (id != null ? !id.equals(rCategory.id) : rCategory.id != null) return false; if (title != null ? !title.equals(rCategory.title) : rCategory.title != null) return false; return true; }

public int hashCode()

{ int result = super.hashCode(); result = 31 * result + (title != null ? title.hashCode() : 0); result = 31 * result + (id != null ? id.hashCode() : 0); return result; }

}

<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
version="1.0">
<package>xxx</package>

<entity class="RCategory" name="RCategory">
<table name="reg_r_category"/>
<primary-key-join-column name="R_CATEGORY_ID" referenced-column-name="STATUS_ID"/>
<post-load method-name="prinf"/>
<attributes>
<id name="id">
<column name="R_CATEGORY_ID"/>
</id>
<basic name="title">
<column length="256" name="TITLE" nullable="false"/>
</basic>

<basic name="description">
<column length="512" name="DESCRIPTION" nullable="false"/>
</basic>

<basic name="containsChildren">
<column name="CONTAIN_SUBCATEGORIES"/>
</basic>

<many-to-one name="parentCategory" target-entity="RCategory">
<join-column name="PARENT_CATEGORY_ID" insertable="true" updatable="true"/>
<cascade>
<cascade-merge/>
<cascade-refresh/>
</cascade>
</many-to-one>

<one-to-many mapped-by="parentCategory" name="children" target-entity="RCategory">
<order-by>title</order-by>
<cascade>
<cascade-all/>
</cascade>
</one-to-many>
</attributes>
</entity>

When i use getReference on RCategory - i get object with NULL!!!! id.
Also, when i use find, i get object with null id too, but i can use it in references (add to another object and persist)