/** INTERNAL: Transform the object-level value into a database-level value */
public Object getFieldValue(Object objectValue, AbstractSession session) {
DatabaseMapping mapping = getMapping();
Object fieldValue = objectValue;
if ((mapping != null)
&& (mapping.isDirectToFieldMapping() || mapping.isDirectCollectionMapping())) {
// CR#3623207, check for IN Collection here not in mapping.
if (objectValue instanceof Collection) {
// This can actually be a collection for IN within expressions... however it would be better
// for expressions to handle this.
Collection values = (Collection) objectValue;
Vector fieldValues = new Vector(values.size());
for (Iterator iterator = values.iterator(); iterator.hasNext(); ) {
Object value = iterator.next();
if (!(value instanceof Expression)) {
value = getFieldValue(value, session);
}
fieldValues.add(value);
}
fieldValue = fieldValues;
} else {
if (mapping.isDirectToFieldMapping()) {
fieldValue = ((AbstractDirectMapping) mapping).getFieldValue(objectValue, session);
} else if (mapping.isDirectCollectionMapping()) {
fieldValue = ((DirectCollectionMapping) mapping).getFieldValue(objectValue, session);
}
}
}
return fieldValue;
}
/** INTERNAL: Find the alias for a given table */
public DatabaseTable aliasForTable(DatabaseTable table) {
DatabaseMapping mapping = getMapping();
if (isAttribute()
|| ((mapping != null)
&& (mapping.isAggregateObjectMapping() || mapping.isTransformationMapping()))) {
return ((DataExpression) getBaseExpression()).aliasForTable(table);
}
// "ref" and "structure" mappings, no table printed in the FROM clause, need to get the table
// alias form the parent table
if ((mapping != null) && (mapping.isReferenceMapping() || mapping.isStructureMapping())) {
DatabaseTable alias =
getBaseExpression().aliasForTable(mapping.getDescriptor().getTables().firstElement());
alias.setName(alias.getName() + "." + mapping.getField().getName());
return alias;
}
// For direct-collection mappings the alias is store on the table expression.
if ((mapping != null) && (mapping.isDirectCollectionMapping())) {
if (tableAliases != null) {
DatabaseTable aliasedTable = tableAliases.keyAtValue(table);
if (aliasedTable != null) {
return aliasedTable;
}
}
return getTable(table).aliasForTable(table);
}
return super.aliasForTable(table);
}
/** Do any required validation for this node. Throw an exception if it's incorrect. */
public void validateNode() {
if ((getQueryKeyOrNull() == null) && (getMapping() == null)) {
throw QueryException.invalidQueryKeyInExpression(getName());
}
QueryKey queryKey = getQueryKeyOrNull();
DatabaseMapping mapping = getMapping();
Object theOneThatsNotNull = null;
boolean qkIsToMany = false;
if (queryKey != null) {
theOneThatsNotNull = queryKey;
qkIsToMany = queryKey.isManyToManyQueryKey() || queryKey.isOneToManyQueryKey();
}
boolean isNestedMapping = false;
if (mapping != null) {
// Bug 2847621 - Add Aggregate Collection to the list of valid items for outer join.
if (shouldUseOuterJoin
&& (!(mapping.isOneToOneMapping()
|| mapping.isOneToManyMapping()
|| mapping.isManyToManyMapping()
|| mapping.isAggregateCollectionMapping()
|| mapping.isDirectCollectionMapping()))) {
throw QueryException.outerJoinIsOnlyValidForOneToOneMappings(getMapping());
}
qkIsToMany = mapping.isCollectionMapping();
if (index != null) {
if (qkIsToMany) {
CollectionMapping collectionMapping = (CollectionMapping) getMapping();
if (collectionMapping.getListOrderField() != null) {
index.setField(collectionMapping.getListOrderField());
if (collectionMapping.shouldUseListOrderFieldTableExpression()) {
Expression newBase = getTable(collectionMapping.getListOrderField().getTable());
index.setBaseExpression(newBase);
} else {
addDerivedField(index);
}
} else {
throw QueryException.indexRequiresCollectionMappingWithListOrderField(
this, collectionMapping);
}
} else {
throw QueryException.indexRequiresCollectionMappingWithListOrderField(this, mapping);
}
}
isNestedMapping = mapping.isNestedTableMapping();
theOneThatsNotNull = mapping;
} else {
if (index != null) {
throw QueryException.indexRequiresCollectionMappingWithListOrderField(this, null);
}
}
if ((!shouldQueryToManyRelationship()) && qkIsToMany && (!isNestedMapping)) {
throw QueryException.invalidUseOfToManyQueryKeyInExpression(theOneThatsNotNull);
}
if (shouldQueryToManyRelationship() && !qkIsToMany) {
throw QueryException.invalidUseOfAnyOfInExpression(theOneThatsNotNull);
}
}