[
https://issues.apache.org/jira/browse/OPENJPA-414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Richard Zowalla resolved OPENJPA-414.
-------------------------------------
Resolution: Won't Fix
Closing as obsolete during backlog cleanup: The posted sample does not compile
(hashCode uses an uninitialized 'result' and has no return) and there is no
runnable reproducer; JOINED inheritance with XML mappings is covered by the
current test suite. Please reopen if this still happens with OpenJPA 4.x.
> Null id's in entyties while using Joined inheritance strategy
> -------------------------------------------------------------
>
> Key: OPENJPA-414
> URL: https://issues.apache.org/jira/browse/OPENJPA-414
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 1.0.0
> Reporter: Alexander Filipchik
> Priority: Blocker
>
> 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)
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