@Override
public EOQualifier qualifierMigratedFromEntityRelationshipPath(
EOQualifier eoqualifier, EOEntity eoentity, String relationshipPath) {
ERXToManyQualifier qualifier = (ERXToManyQualifier) eoqualifier;
String newPath =
EOQualifierSQLGeneration.Support._translateKeyAcrossRelationshipPath(
qualifier.key(), relationshipPath, eoentity);
return new ERXToManyQualifier(newPath, qualifier.elements(), qualifier.minCount());
}
@Override
@SuppressWarnings("unchecked")
public String sqlStringForSQLExpression(EOQualifier eoqualifier, EOSQLExpression e) {
ERXToManyQualifier qualifier = (ERXToManyQualifier) eoqualifier;
StringBuilder result = new StringBuilder();
EOEntity targetEntity = e.entity();
NSArray<String> toManyKeys = NSArray.componentsSeparatedByString(qualifier.key(), ".");
EORelationship targetRelationship = null;
for (int i = 0; i < toManyKeys.count() - 1; i++) {
targetRelationship = targetEntity.anyRelationshipNamed(toManyKeys.objectAtIndex(i));
targetEntity = targetRelationship.destinationEntity();
}
targetRelationship = targetEntity.relationshipNamed(toManyKeys.lastObject());
targetEntity = targetRelationship.destinationEntity();
if (targetRelationship.joins() == null || targetRelationship.joins().isEmpty()) {
// we have a flattened many to many
String definitionKeyPath = targetRelationship.definition();
NSArray<String> definitionKeys =
NSArray.componentsSeparatedByString(definitionKeyPath, ".");
EOEntity lastStopEntity = targetRelationship.entity();
EORelationship firstHopRelationship =
lastStopEntity.relationshipNamed(definitionKeys.objectAtIndex(0));
EOEntity endOfFirstHopEntity = firstHopRelationship.destinationEntity();
EOJoin join = firstHopRelationship.joins().objectAtIndex(0); // assumes 1 join
EOAttribute sourceAttribute = join.sourceAttribute();
EOAttribute targetAttribute = join.destinationAttribute();
EORelationship secondHopRelationship =
endOfFirstHopEntity.relationshipNamed(definitionKeys.objectAtIndex(1));
join = secondHopRelationship.joins().objectAtIndex(0); // assumes 1 join
EOAttribute secondHopSourceAttribute = join.sourceAttribute();
NSMutableArray<String> lastStopPKeyPath = toManyKeys.mutableClone();
lastStopPKeyPath.removeLastObject();
lastStopPKeyPath.addObject(firstHopRelationship.name());
lastStopPKeyPath.addObject(targetAttribute.name());
String firstHopRelationshipKeyPath = lastStopPKeyPath.componentsJoinedByString(".");
result.append(e.sqlStringForAttributeNamed(firstHopRelationshipKeyPath));
result.append(" IN ( SELECT ");
result.append(lastStopEntity.externalName());
result.append('.');
result.append(lastStopEntity.primaryKeyAttributes().objectAtIndex(0).columnName());
result.append(" FROM ");
result.append(lastStopEntity.externalName());
result.append(',');
lastStopPKeyPath.removeLastObject();
String tableAliasForJoinTable =
(String)
e.aliasesByRelationshipPath()
.objectForKey(
lastStopPKeyPath.componentsJoinedByString(".")); // "j"; //+random#
result.append(endOfFirstHopEntity.externalName());
result.append(' ');
result.append(tableAliasForJoinTable);
result.append(" WHERE ");
appendColumnForAttributeToStringBuilder(sourceAttribute, result);
result.append('=');
result.append(e.sqlStringForAttributeNamed(firstHopRelationshipKeyPath));
if (qualifier.elements() != null) {
NSArray pKeys = ERXEOAccessUtilities.primaryKeysForObjects(qualifier.elements());
result.append(" AND ");
result.append(tableAliasForJoinTable);
result.append('.');
result.append(secondHopSourceAttribute.columnName());
result.append(" IN (");
EOAttribute pk = targetEntity.primaryKeyAttributes().lastObject();
for (int i = 0; i < pKeys.count(); i++) {
Object key = pKeys.objectAtIndex(i);
String keyString = e.formatValueForAttribute(key, pk);
// AK: default is is broken
if ("NULL".equals(keyString)) {
keyString = "" + key;
}
result.append(keyString);
if (i < pKeys.count() - 1) {
result.append(',');
}
}
result.append(") ");
}
result.append(" GROUP BY ");
appendColumnForAttributeToStringBuilder(sourceAttribute, result);
result.append(" HAVING COUNT(*)");
if (qualifier.minCount() <= 0) {
result.append("=" + qualifier.elements().count());
} else {
result.append(">=" + qualifier.minCount());
}
result.append(" )");
} else {
throw new RuntimeException("not implemented!!");
}
return result.toString();
}