@Override
public void customize(ClassDescriptor descriptor) throws Exception {
// Direct (basic) query for the Oracle DB's ROWID value
descriptor.addDirectQueryKey("rowId", "ROWID");
// 1:M query accessing all projects which have a M:1 teamLeader reference to this employee
// this can also be used to allow querying of large collections not wanted mapped
OneToManyQueryKey projectsQueryKey = new OneToManyQueryKey();
projectsQueryKey.setName("datafiles");
projectsQueryKey.setReferenceClass(Datafile.class);
ExpressionBuilder builder = new ExpressionBuilder();
projectsQueryKey.setJoinCriteria(
builder
.getField("DATAFILE.DATAFILEFORMAT")
.equal(builder.getParameter("DATAFILEFORMAT.ID")));
descriptor.addQueryKey(projectsQueryKey);
}
protected void addCustomQueryKeys(ClassDescriptor descriptor) {
ExpressionBuilder builder;
// add QueryKeys to Employee descriptor
if (descriptor.getJavaClass().equals(Employee.class)) {
// Employee's Address (same as address attribute).
OneToOneQueryKey queryKey = new OneToOneQueryKey();
queryKey.setName("addressQK");
queryKey.setReferenceClass(Address.class);
builder = new ExpressionBuilder();
queryKey.setJoinCriteria(
builder
.getField("MBR1_ADDRESS.ADDRESS_ID")
.equal(builder.getParameter("MBR2_EMPLOYEE.ADDR_ID")));
descriptor.addQueryKey(queryKey);
// Projects led by Employee.
OneToManyQueryKey managedProjectsQueryKey = new OneToManyQueryKey();
managedProjectsQueryKey.setName("managedProjects");
managedProjectsQueryKey.setReferenceClass(Project.class);
builder = new ExpressionBuilder();
managedProjectsQueryKey.setJoinCriteria(
builder
.getField("MBR3_PROJECT.LEADER_ID")
.equal(builder.getParameter("MBR2_EMPLOYEE.EMP_ID")));
descriptor.addQueryKey(managedProjectsQueryKey);
// LargeProjects led by Employee.
OneToManyQueryKey managedLargeProjectsQueryKey = new OneToManyQueryKey();
managedLargeProjectsQueryKey.setName("managedLargeProjects");
managedLargeProjectsQueryKey.setReferenceClass(LargeProject.class);
builder = new ExpressionBuilder();
managedLargeProjectsQueryKey.setJoinCriteria(
builder
.getField("MBR3_PROJECT.LEADER_ID")
.equal(builder.getParameter("MBR2_EMPLOYEE.EMP_ID")));
descriptor.addQueryKey(managedLargeProjectsQueryKey);
// Employee's Projects (same as projects attribute).
ManyToManyQueryKey projectsQueryKey = new ManyToManyQueryKey();
projectsQueryKey.setName("projectsQK");
projectsQueryKey.setReferenceClass(Project.class);
builder = new ExpressionBuilder();
projectsQueryKey.setJoinCriteria(
(builder
.getParameter("MBR2_EMPLOYEE.EMP_ID")
.equal(builder.getTable("MBR3_EMP_PROJ").getField("EMPLOYEES_EMP_ID"))
.and(
builder
.getTable("MBR3_EMP_PROJ")
.getField("PROJECTS_PROJ_ID")
.equal(builder.getField("MBR3_PROJECT.PROJ_ID")))));
descriptor.addQueryKey(projectsQueryKey);
// Employee's LargeProjects.
ManyToManyQueryKey largeProjectsQueryKey = new ManyToManyQueryKey();
largeProjectsQueryKey.setName("largeProjects");
largeProjectsQueryKey.setReferenceClass(LargeProject.class);
builder = new ExpressionBuilder();
largeProjectsQueryKey.setJoinCriteria(
(builder
.getParameter("MBR2_EMPLOYEE.EMP_ID")
.equal(builder.getTable("MBR3_EMP_PROJ").getField("EMPLOYEES_EMP_ID"))
.and(
builder
.getTable("MBR3_EMP_PROJ")
.getField("PROJECTS_PROJ_ID")
.equal(builder.getField("MBR3_PROJECT.PROJ_ID")))));
descriptor.addQueryKey(largeProjectsQueryKey);
// Employee's responsibilities (same as responsibilities) - can't make this work so far.
DirectCollectionQueryKey responsibilitiesQueryKey = new DirectCollectionQueryKey();
responsibilitiesQueryKey.setName("responsibilitiesQK");
builder = new ExpressionBuilder();
responsibilitiesQueryKey.setJoinCriteria(
builder
.getField("MBR1_RESPONS.DESCRIPTION")
.equal(
builder
.getField("MBR1_RESPONS.EMP_ID")
.equal(builder.getParameter("MBR2_EMPLOYEE.EMP_ID"))));
descriptor.addQueryKey(responsibilitiesQueryKey);
} else if (descriptor.getJavaClass().equals(Address.class)) {
// Employee that references Address
OneToOneQueryKey ownerQueryKey = new OneToOneQueryKey();
ownerQueryKey.setName("owner");
ownerQueryKey.setReferenceClass(Employee.class);
builder = new ExpressionBuilder();
ownerQueryKey.setJoinCriteria(
builder
.getField("MBR2_EMPLOYEE.ADDR_ID")
.equal(builder.getParameter("MBR1_ADDRESS.ADDRESS_ID")));
descriptor.addQueryKey(ownerQueryKey);
} else if (descriptor.getJavaClass().equals(Project.class)) {
// Project's employees.
ManyToManyQueryKey employesQueryKey = new ManyToManyQueryKey();
employesQueryKey.setName("employees");
employesQueryKey.setReferenceClass(Employee.class);
builder = new ExpressionBuilder();
employesQueryKey.setJoinCriteria(
(builder
.getParameter("MBR3_PROJECT.PROJ_ID")
.equal(builder.getTable("MBR3_EMP_PROJ").getField("PROJECTS_PROJ_ID"))
.and(
builder
.getTable("MBR3_EMP_PROJ")
.getField("EMPLOYEES_EMP_ID")
.equal(builder.getField("MBR2_EMPLOYEE.EMP_ID")))));
descriptor.addQueryKey(employesQueryKey);
}
}
