/*
* INTERNAL:
* If this query key represents a foreign reference answer the
* base expression -> foreign reference join criteria.
*/
public Expression mappingCriteria() {
Expression selectionCriteria;
// First look for a query key, then a mapping
if (getQueryKeyOrNull() == null) {
if ((getMapping() == null) || (!getMapping().isForeignReferenceMapping())) {
return null;
} else {
// The join criteria is now twisted by the mappings.
selectionCriteria = ((ForeignReferenceMapping) getMapping()).getJoinCriteria(this);
}
} else {
if (!getQueryKeyOrNull().isForeignReferenceQueryKey()) {
return null;
} else {
selectionCriteria = ((ForeignReferenceQueryKey) getQueryKeyOrNull()).getJoinCriteria();
selectionCriteria = getBaseExpression().twist(selectionCriteria, this);
}
}
if (shouldUseOuterJoin() && getSession().getPlatform().shouldPrintOuterJoinInWhereClause()) {
selectionCriteria = selectionCriteria.convertToUseOuterJoin();
}
return selectionCriteria;
}
/**
* INTERNAL: Return the expression to join the main table of this node to any auxiliary tables.
*/
public Expression additionalExpressionCriteria() {
if (getDescriptor() == null) {
return null;
}
Expression criteria = getDescriptor().getQueryManager().getAdditionalJoinExpression();
if (criteria != null) {
criteria = getBaseExpression().twist(criteria, this);
if (shouldUseOuterJoin() && getSession().getPlatform().shouldPrintOuterJoinInWhereClause()) {
criteria.convertToUseOuterJoin();
}
}
if (getSession().getPlatform().shouldPrintOuterJoinInWhereClause()) {
if (isUsingOuterJoinForMultitableInheritance()) {
Expression childrenCriteria =
getDescriptor().getInheritancePolicy().getChildrenJoinExpression();
childrenCriteria = getBaseExpression().twist(childrenCriteria, this);
childrenCriteria.convertToUseOuterJoin();
if (criteria == null) {
criteria = childrenCriteria;
} else {
criteria = criteria.and(childrenCriteria);
}
}
}
if ((getDescriptor() != null) && (getDescriptor().getHistoryPolicy() != null)) {
Expression historyCriteria =
getDescriptor().getHistoryPolicy().additionalHistoryExpression(this);
if (criteria != null) {
criteria = criteria.and(historyCriteria);
} else {
criteria = historyCriteria;
}
}
return criteria;
}
