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 resolveDoubleFileInconsistency() {
String file1 = currentFile().getName();
String file2 = otherFile().getName();
Log.warn(
"The database was left in inconsistent state, both files exist!",
"file1",
file1,
"file2",
file2);
long modif1, modif2;
try {
modif1 = (Long) loadMetadata(new FileInputStream(currentFile())).get(META_TIMESTAMP);
modif2 = (Long) loadMetadata(new FileInputStream(otherFile())).get(META_TIMESTAMP);
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
}
U.must(
modif1 != modif2,
"Cannot determine which database file to remove, please remove the incorrect file manually!");
// delete the most recent file, since it wasn't written completely
File recent = modif1 > modif2 ? currentFile() : otherFile();
Log.warn(
"The more recent database file is assumed incomplete, so it will be deleted!",
"file",
recent);
recent.delete();
}
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;
}
