The following seems to work for me:
| @Entity
| @Table(name = "ModuleProperty")
| public class ModuleProperty implements Serializable {
|
| /**
| *
| */
| private static final long serialVersionUID = 1L;
|
| ModulePropertyPK id;
|
| Module module;
|
| String value;
|
| public ModuleProperty() {
| super();
| id = new ModulePropertyPK();
| }
|
| public String getValue() {
| return value;
| }
|
| public void setValue(String value) {
| this.value = value;
| }
|
| @EmbeddedId
| @AttributeOverrides({
| @AttributeOverride(name="moduleID", [EMAIL
PROTECTED](name="MODULEID")),
| @AttributeOverride(name="name", [EMAIL PROTECTED](name="NAME"))
| })
| public ModulePropertyPK getId() {
| return id;
| }
|
| public void setId(ModulePropertyPK id) {
| this.id = id;
| }
|
| @ManyToOne()
| @JoinColumn(name="MODULEID",updatable=false,insertable=false)
| public Module getModule() {
| return module;
| }
|
| public void setModule(Module module) {
| this.module = module;
| id.setModuleID(module.getModuleID());
| }
|
| @Column(name="NAME",updatable=false,insertable=false)
| public String getName(){
| return id.getName();
| }
|
| public void setName(String name){
| id.setName(name);
| }
| }
|
using @Column(updatable=false,insertable=false)
helped with mapping the FK to the field in composite key. However on the SLSB
side I have to do the following to update changes to module properties:
| public Module updateModule(Module m) {
| try {
| Module module = em.find(Module.class,m.getModuleID());
| Logger.getLogger(this.getClass()).info(
| "Updating module: " + m.getModuleID());
| Map<String, ModuleProperty> properties =
m.getProperties();
| Map<String, ModuleProperty> props =
module.getProperties();
| for (ModuleProperty p : properties.values()) {
| if(!props.containsKey(p.getName())){
| p.setModule(module);
| em.persist(p);
| props.put(p.getName(),p);
| } else{
|
props.get(p.getName()).setValue(p.getValue());
| em.merge(props.get(p.getName()));
| }
| }
| Set<String> keysToRemove = new HashSet<String>();
| for(String key: props.keySet()){
| if(!properties.containsKey(key)){
| keysToRemove.add(key);
| }
| }
| for(String key: keysToRemove){
| em.remove(props.get(key));
| props.remove(key);
| }
| module.setProperties(props);
| em.merge(module);
| return module;
| } catch (Exception ex) {
| ex.printStackTrace();
| }
| return null;
| }
|
If I don't do this the update throws batch update exception.
I would assume that merge should have handle that.
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