/**
* INTERNAL: Rebuild myself against the base, with the values of parameters supplied by the
* context expression. This is used for transforming a standalone expression (e.g. the join
* criteria of a mapping) into part of some larger expression. You normally would not call this
* directly, instead calling twist See the comment there for more details"
*/
public Expression twistedForBaseAndContext(Expression newBase, Expression context) {
Expression twistedBase = getBaseExpression().twistedForBaseAndContext(newBase, context);
QueryKeyExpression result = (QueryKeyExpression) twistedBase.get(getName());
if (shouldUseOuterJoin) {
result.doUseOuterJoin();
}
if (shouldQueryToManyRelationship) {
result.doQueryToManyRelationship();
}
return result;
}
/**
* PUBLIC: Return an expression representing traversal of a 1:many or many:many relationship. This
* allows you to query whether any of the "many" side of the relationship satisfies the remaining
* criteria.
*
* <p>Example:
*
* <pre><blockquote>
* Expression: employee.anyOf("managedEmployees").get("firstName").equal("Bob")
* Java: no direct equivalent
* SQL: SELECT DISTINCT ... WHERE (t2.MGR_ID = t1.ID) AND (t2.F_NAME = 'Bob')
* </pre>
*
* </blockquote>
*
* @parameter shouldJoinBeIndependent indicates whether a new expression should be created.
*/
@Override
public Expression anyOf(String attributeName, boolean shouldJoinBeIndependent) {
QueryKeyExpression queryKey;
if (shouldJoinBeIndependent) {
queryKey = newDerivedExpressionNamed(attributeName);
} else {
queryKey = derivedExpressionNamed(attributeName);
}
queryKey.doQueryToManyRelationship();
return queryKey;
}
/**
* INTERNAL: This expression is built on a different base than the one we want. Rebuild it and
* return the root of the new tree
*/
public Expression rebuildOn(Expression newBase) {
Expression newLocalBase = getBaseExpression().rebuildOn(newBase);
QueryKeyExpression result = null;
// For bug 3096634 rebuild outer joins correctly from the start.
if (shouldUseOuterJoin) {
result = (QueryKeyExpression) newLocalBase.getAllowingNull(getName());
} else {
result = (QueryKeyExpression) newLocalBase.get(getName());
}
if (shouldQueryToManyRelationship) {
result.doQueryToManyRelationship();
}
result.setSelectIfOrderedBy(selectIfOrderedBy());
return result;
}
