// If we find a JoinColumn(s) annotations then process a
// uni-directional one to many.
if (!getJoinColumns().isEmpty()) {
// Create a 1-M unidirectional mapping and process common collection mapping
// metadata.
UnidirectionalOneToManyMapping mapping = new UnidirectionalOneToManyMapping();
process(mapping);
// Process the JoinTable metadata.
processUnidirectionalOneToManyTargetForeignKeyRelationship(mapping);
// Process properties
processProperties(mapping);
// Add the mapping to the descriptor.
getDescriptor().addMapping(mapping);
} else {
// Create a M-M mapping and process common collection mapping
// metadata.
ManyToManyMapping mapping = new ManyToManyMapping();
process(mapping);
// Process the JoinTable metadata.
processJoinTable(mapping);
// Process properties
processProperties(mapping);
// Add the mapping to the descriptor.
getDescriptor().addMapping(mapping);
}
} else {
// Create a 1-M mapping and process common collection mapping
// metadata.
OneToManyMapping mapping = new OneToManyMapping();
process(mapping);
// Non-owning side, process the foreign keys from the owner.
OneToOneMapping ownerMapping = null;
if (getOwningMapping(getMappedBy()).isOneToOneMapping()){
ownerMapping = (OneToOneMapping) getOwningMapping(getMappedBy());
} else {
// If improper mapping encountered, throw an exception.
throw ValidationException.invalidMapping(getJavaClass(), getReferenceClass());
}
Map<DatabaseField, DatabaseField> keys = ownerMapping.getSourceToTargetKeyFields();
for (DatabaseField fkField : keys.keySet()) {
DatabaseField pkField = keys.get(fkField);
// If we are within a table per class strategy we have to update
// the primary key field to point to our own database table.
// The extra table check is if the mapping is actually defined
// on our java class (meaning we have the right table at this
// point and can avoid the cloning)
if (getDescriptor().usesTablePerClassInheritanceStrategy() && ! pkField.getTable().equals(getDescriptor().getPrimaryTable())) {
// We need to update the pk field to be to our table.
pkField = (DatabaseField) pkField.clone();
pkField.setTable(getDescriptor().getPrimaryTable());
}
mapping.addTargetForeignKeyField(fkField, pkField);
}
// Process properties
processProperties(mapping);