private Prop findRelProperty(Class<?> fromCls, String rel, Class<?> toCls) {
Object entity = !fromCls.isInterface() ? data.constructor.create(fromCls) : null;
for (Prop prop : Beany.propertiesOf(fromCls).select(data.relPropSelector)) {
String relName = null;
if (!fromCls.isInterface()) {
Object value = prop.getRaw(entity);
if (hasEntityLinks(value)) {
EntityLinks links = entityLinks(value);
relName = links.relationName();
}
} else {
Rel relation = prop.getAnnotation(Rel.class);
if (relation != null) {
relName = relation.value();
}
}
if (relName != null && relName.equals(rel)) {
if (prop.getRawTypeArg(0).equals(toCls)) {
return prop;
}
}
}
Log.warn(
"Didn't find inverse relation property!", "relation", rel, "from", fromCls, "to", toCls);
return null;
}
private void deleteRelsFor(Object entity) {
for (Prop prop : Beany.propertiesOf(entity).select(data.relPropSelector)) {
Object value = prop.getRaw(entity);
if (hasEntityLinks(value)) {
EntityLinks links = entityLinks(value);
long fromId = links.fromId();
propageteRelChanges(entity, prop, links, fromId, null, links.allRelIds());
}
}
}
private RelPair getRelPair(Object entity, Prop prop, String rel, boolean inverse) {
Class<?> cls = prop.getRawTypeArg(0);
Class<? extends Object> entCls = Cls.unproxy(entity.getClass());
Class<?> srcType = inverse ? cls : entCls;
Class<?> destType = inverse ? entCls : cls;
Tuple key = new Tuple(rel, srcType, destType);
RelPair relPair = data.relPairs.get(key);
Prop srcProp, destProp;
if (relPair != null) {
srcProp = relPair.srcProp;
destProp = relPair.destProp;
} else {
String invRel = inverse ? rel : "^" + rel;
Prop p = findRelProperty(cls, invRel, entCls);
srcProp = inverse ? p : prop;
destProp = inverse ? prop : p;
relPair = new RelPair(rel, srcType, destType, srcProp, destProp);
data.relPairs.putIfAbsent(key, relPair);
if (srcType == null || srcProp == null || destType == null || destProp == null) {
Log.warn("Incomplete relation pair!", "relation", relPair);
}
}
return relPair;
}
private void relUnlink(String relation, Prop srcProp, long fromId, Prop destProp, long toId) {
if (srcProp != null && destProp != null) {
Object from = get_(fromId, true);
EntityLinks srcRels = entityLinks(srcProp.getRaw(from));
srcRels.removeRelTo(toId);
update_(fromId, from, false, false);
}
}
private void update_(long id, Object record, boolean reflectRelChanges, boolean checkSecurity) {
failIfReadonlyTx();
validateId(id);
Rec old = data.data.get(id);
Object entity = obj(old);
if (checkSecurity) {
secureUpdate(entity);
}
// Optimistic concurrency control through the "version" property
Long oldVersion = U.or(Beany.getPropValueOfType(entity, VERSION, Long.class, null), 0L);
Long recordVersion = U.or(Beany.getPropValueOfType(record, VERSION, Long.class, null), 0L);
occErrorIf(
!U.eq(oldVersion, recordVersion),
"Concurrent modification occured while updating the object with ID=%s!",
id);
Beany.setId(record, id);
if (!sudo && checkSecurity) {
boolean canUpdate = false;
for (Prop prop : Beany.propertiesOf(record)) {
if (!Secure.getPropertyPermissions(username(), entity.getClass(), entity, prop.getName())
.change) {
prop.set(record, prop.get(entity));
} else {
canUpdate = true;
}
}
U.secure(
canUpdate,
"Not enough privileges to update any column of %s!",
entity.getClass().getSimpleName());
}
// Optimistic concurrency control through the "version" property
if (Beany.hasProperty(record, VERSION)) {
Beany.setPropValue(record, VERSION, oldVersion + 1);
}
if (checkSecurity) {
secureUpdate(record);
}
if (Beany.hasProperty(record, LAST_UPDATED_BY)) {
Beany.setPropValue(record, LAST_UPDATED_BY, username());
}
if (Beany.hasProperty(record, LAST_UPDATED_ON)) {
Beany.setPropValue(record, LAST_UPDATED_ON, new Date());
}
boolean updated = data.data.replace(id, old, rec(record));
occErrorIf(
!updated, "Concurrent modification occured while updating the object with ID=%s!", id);
if (data.insideTx.get()) {
data.txChanges.putIfAbsent(id, old);
}
if (old == null) {
throw new IllegalStateException("Cannot update non-existing record with ID=" + id);
}
if (reflectRelChanges) {
updateChangesFromRels(record);
}
data.lastChangedOn.set(System.currentTimeMillis());
Log.audit("Updated DB record", "id", id);
}
@Override
public boolean eval(Prop prop) throws Exception {
return Cls.isAssignableTo(
prop.getType(), Number.class, String.class, Boolean.class, Enum.class, Date.class);
}
