private boolean applyNestedResultMappings(
ResultSetWrapper rsw,
ResultMap resultMap,
MetaObject metaObject,
String parentPrefix,
CacheKey parentRowKey,
boolean newObject) {
boolean foundValues = false;
for (ResultMapping resultMapping : resultMap.getPropertyResultMappings()) {
final String nestedResultMapId = resultMapping.getNestedResultMapId();
if (nestedResultMapId != null && resultMapping.getResultSet() == null) {
try {
final String columnPrefix = getColumnPrefix(parentPrefix, resultMapping);
final ResultMap nestedResultMap =
getNestedResultMap(rsw.getResultSet(), nestedResultMapId, columnPrefix);
CacheKey rowKey = null;
Object ancestorObject = null;
if (ancestorColumnPrefix.containsKey(nestedResultMapId)) {
rowKey =
createRowKey(nestedResultMap, rsw, ancestorColumnPrefix.get(nestedResultMapId));
ancestorObject = ancestorObjects.get(rowKey);
}
if (ancestorObject != null) {
if (newObject) metaObject.setValue(resultMapping.getProperty(), ancestorObject);
} else {
rowKey = createRowKey(nestedResultMap, rsw, columnPrefix);
final CacheKey combinedKey = combineKeys(rowKey, parentRowKey);
Object rowValue = nestedResultObjects.get(combinedKey);
boolean knownValue = (rowValue != null);
final Object collectionProperty =
instantiateCollectionPropertyIfAppropriate(resultMapping, metaObject);
if (anyNotNullColumnHasValue(resultMapping, columnPrefix, rsw.getResultSet())) {
rowValue =
getRowValue(rsw, nestedResultMap, combinedKey, rowKey, columnPrefix, rowValue);
if (rowValue != null && !knownValue) {
if (collectionProperty != null) {
final MetaObject targetMetaObject =
configuration.newMetaObject(collectionProperty);
targetMetaObject.add(rowValue);
} else {
metaObject.setValue(resultMapping.getProperty(), rowValue);
}
foundValues = true;
}
}
}
} catch (SQLException e) {
throw new ExecutorException(
"Error getting nested result map values for '"
+ resultMapping.getProperty()
+ "'. Cause: "
+ e,
e);
}
}
}
return foundValues;
}
private void linkToParent(ResultSet rs, ResultMapping parentMapping, Object rowValue)
throws SQLException {
CacheKey parentKey =
createKeyForMultipleResults(
rs, parentMapping, parentMapping.getColumn(), parentMapping.getForeignColumn());
PendingRelation parent = pendingRelations.get(parentKey);
if (parent != null) {
final Object collectionProperty =
instantiateCollectionPropertyIfAppropriate(parent.propertyMapping, parent.metaObject);
if (rowValue != null) {
if (collectionProperty != null) {
final MetaObject targetMetaObject = configuration.newMetaObject(collectionProperty);
targetMetaObject.add(rowValue);
} else {
parent.metaObject.setValue(parent.propertyMapping.getProperty(), rowValue);
}
}
}
}