How can I map a class with composite-id and extend another class? I'm using the example in: http://www.javacodegeeks.com/2012/08/hibernate-composite-ids-with.html
I have tried to change the code, but when I try to insert data using this mapping it returns the error: Column 'ID' cannot be null
Report.java
public class Report implements Serializable{
private static final long serialVersionUID = 9146156921169669644L;
private Integer id;
private String name;
private Set<ReportSummary> reportSummaryList = new HashSet<ReportSummary>();
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<ReportSummary> getReportSummaryList() {
return reportSummaryList;
}
public void setReportSummaryList(Set<ReportSummary> reportSummaryList) {
this.reportSummaryList = reportSummaryList;
}
}
Report.hbm.xml
<hibernate-mapping>
<class name="com.example.domain.Report" table="REPORT" >
<id name="id" type="int" column="id" >
<generator class="native"/>
</id>
<property name="name">
<column name="NAME" />
</property>
<set name="reportSummaryList" table="REPORT_SUMMARY" cascade="all" inverse="true">
<key column="RPT_ID" not-null="true"></key>
<one-to-many class="com.example.domain.ReportSummary"/>
</set>
</class>
</hibernate-mapping>
ReportSummary.java
public class ReportSummary implements Serializable {
private static final long serialVersionUID = 8052962961003467437L;
private ReportSummaryId id;
private String name;
public ReportSummaryId getId() {
return id;
}
public void setId(ReportSummaryId id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ReportSummary other = (ReportSummary) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
return true;
}
}
ReportSummaryId.java
public class ReportSummaryId implements Serializable{
private static final long serialVersionUID = 6911616314813390449L;
private Integer id;
private Report report;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Report getReport() {
return report;
}
public void setReport(Report report) {
this.report = report;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
result = prime * result + ((report == null) ? 0 : report.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ReportSummaryId other = (ReportSummaryId) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
if (report == null) {
if (other.report != null)
return false;
} else if (!report.equals(other.report))
return false;
return true;
}
}
ReportSummaryDetailed.java
public class ReportSummaryDetailed extends ReportSummary {
private static final long serialVersionUID = -7542202157126903815L;
private String detalhe;
public String getDetalhe() {
return detalhe;
}
public void setDetalhe(String detalhe) {
this.detalhe = detalhe;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((super.getId() == null) ? 0 : super.getId().hashCode());
result = prime * result + ((super.getName() == null) ? 0 : super.getName().hashCode());
result = prime * result + ((detalhe == null) ? 0 : detalhe.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ReportSummaryDetailed other = (ReportSummaryDetailed) obj;
if (super.getId() == null) {
if (other.getId() != null)
return false;
} else if (!super.getId().equals(other.getId()))
return false;
if (super.getName() == null) {
if (other.getName() != null)
return false;
} else if (!super.getName().equals(other.getName()))
return false;
if (detalhe == null) {
if (other.detalhe != null)
return false;
} else if (!detalhe.equals(other.detalhe))
return false;
return true;
}
}
ReportSummary.hbm.xml
<hibernate-mapping>
<class name="com.example.domain.ReportSummary" table="REPORT_SUMMARY" >
<composite-id name="id" class="com.example.domain.ReportSummaryId">
<key-property name="id" column="ID"></key-property>
<key-many-to-one name="report"
class="com.example.domain.Report"
column="RPT_ID"></key-many-to-one>
</composite-id>
<property name="name">
<column name="NAME" />
</property>
<joined-subclass name="com.example.domain.ReportSummaryDetailed" extends="ReportSummary" table="REPORT_SUMMARY_DETAILED" >
<key>
<column name="ID" />
<column name="RPT_ID" />
</key>
<property name="detalhe">
<column name="DETALHE" />
</property>
</joined-subclass>
</class>
</hibernate-mapping>