protected EOQualifier extraQualifier(D2WContext c, NSDictionary<String, Object> dict) {
NSMutableArray<EOQualifier> qualifiers = new NSMutableArray<>();
EOQualifier result = null;
for (String key : dict.allKeys()) {
Object value = null;
if (dict.objectForKey(key) instanceof NSDictionary) {
// qualifier definition with operator
NSDictionary qDict = (NSDictionary) dict.objectForKey(key);
if (qDict.size() == 1) {
String operatorKey = (String) qDict.allKeys().lastObject();
String contextKeyPath = (String) qDict.objectForKey(operatorKey);
if ("NSKeyValueCoding.NullValue".equals(contextKeyPath)) {
value = NSKeyValueCoding.NullValue;
} else {
value = c.valueForKeyPath(contextKeyPath);
}
if (value != null) {
EOQualifier q = qualifierForOperatorAndObject(key, operatorKey, value);
qualifiers.addObject(q);
}
}
} else {
value = c.valueForKeyPath((String) dict.objectForKey(key));
if (value != null) {
EOQualifier q;
if (value instanceof NSArray) {
q = qualifierForArray(key, (NSArray) value);
} else {
if (value == NSKeyValueCoding.NullValue) {
value = null;
}
q = qualifierForObject(key, value);
}
if (q != null) {
qualifiers.addObject(q);
}
}
}
}
if (qualifiers.count() > 0) result = new EOAndQualifier(qualifiers);
if (log.isDebugEnabled()) {
log.debug("Computed qualifier: " + result);
}
return result;
}
