private Object makeCompositeKey(Model model) throws Exception {
initProperties();
Class<?> idClass = getCompositeKeyClass();
Object id = idClass.newInstance();
PropertyDescriptor[] idProperties = PropertyUtils.getPropertyDescriptors(idClass);
if (idProperties == null || idProperties.length == 0)
throw new UnexpectedException("Composite id has no properties: " + idClass.getName());
for (PropertyDescriptor idProperty : idProperties) {
// do we have a field for this?
String idPropertyName = idProperty.getName();
// skip the "class" property...
if (idPropertyName.equals("class")) continue;
Model.Property modelProperty = this.properties.get(idPropertyName);
if (modelProperty == null)
throw new UnexpectedException(
"Composite id property missing: "
+ clazz.getName()
+ "."
+ idPropertyName
+ " (defined in IdClass "
+ idClass.getName()
+ ")");
// sanity check
Object value = modelProperty.field.get(model);
if (modelProperty.isMultiple)
throw new UnexpectedException(
"Composite id property cannot be multiple: "
+ clazz.getName()
+ "."
+ idPropertyName);
// now is this property a relation? if yes then we must use its ID in the key (as per specs)
if (modelProperty.isRelation) {
// get its id
if (!Model.class.isAssignableFrom(modelProperty.type))
throw new UnexpectedException(
"Composite id property entity has to be a subclass of Model: "
+ clazz.getName()
+ "."
+ idPropertyName);
// we already checked that cast above
@SuppressWarnings("unchecked")
Model.Factory factory =
Model.Manager.factoryFor((Class<? extends Model>) modelProperty.type);
if (factory == null)
throw new UnexpectedException(
"Failed to find factory for Composite id property entity: "
+ clazz.getName()
+ "."
+ idPropertyName);
// we already checked that cast above
if (value != null) value = factory.keyValue((Model) value);
}
// now affect the composite id with this id
PropertyUtils.setSimpleProperty(id, idPropertyName, value);
}
return id;
}
public Model findById(String id) throws Exception {
if (id == null) {
return null;
}
Factory factory = Model.Manager.factoryFor(entityClass);
Object boundId = Binder.directBind(id, factory.keyType());
return factory.findById(boundId);
}
@SuppressWarnings("unchecked")
public List<Model> findPage(
int page, String search, String searchFields, String orderBy, String order, String where) {
int offset = (page - 1) * getPageSize();
List<String> properties =
searchFields == null
? new ArrayList<String>(0)
: Arrays.asList(searchFields.split("[ ]"));
return Model.Manager.factoryFor(entityClass)
.fetch(offset, getPageSize(), orderBy, order, properties, search, where);
}
public Model findById(Object id) {
if (id == null) {
return null;
}
try {
return JPA.em()
.find(
clazz, Binder.directBind(id.toString(), Model.Manager.factoryFor(clazz).keyType()));
} catch (Exception e) {
// Key is invalid, thus nothing was found
return null;
}
}
@Override
@SuppressWarnings("unchecked")
public Object bind(
String name,
Class clazz,
java.lang.reflect.Type type,
Annotation[] annotations,
Map<String, String[]> params) {
// TODO need to be more generic in order to work with JPASupport
if (JPABase.class.isAssignableFrom(clazz)) {
String keyName = Model.Manager.factoryFor(clazz).keyName();
String idKey = name + "." + keyName;
if (params.containsKey(idKey)
&& params.get(idKey).length > 0
&& params.get(idKey)[0] != null
&& params.get(idKey)[0].trim().length() > 0) {
String id = params.get(idKey)[0];
try {
Query query =
JPA.em().createQuery("from " + clazz.getName() + " o where o." + keyName + " = ?");
query.setParameter(
1,
play.data.binding.Binder.directBind(
name, annotations, id + "", Model.Manager.factoryFor(clazz).keyType()));
Object o = query.getSingleResult();
return GenericModel.edit(o, name, params, annotations);
} catch (NoResultException e) {
// ok
} catch (Exception e) {
throw new UnexpectedException(e);
}
}
return GenericModel.create(clazz, name, params, annotations);
}
return super.bind(name, clazz, type, annotations, params);
}
public ObjectType(Class<? extends Model> modelClass) {
this.modelName = modelClass.getSimpleName();
this.entityClass = modelClass;
this.factory = Model.Manager.factoryFor(entityClass);
this.keyName = factory.keyName();
}
