/**
* Initializes {@link org.lightmare.criteria.query.LambdaStream} implementation implementation for
* JOIN expression
*
* @param parent
* @param alias
* @param joinType
* @return L {@link org.lightmare.criteria.query.LambdaStream} implementation
*/
protected static <P, E, S extends LambdaStream<E, ? super S>> S initJoinQuery(
AbstractQueryStream<P, ?, ?> parent, String alias, Class<E> joinType) {
S joinQuery;
if (alias == null) {
joinQuery = ObjectUtils.applyAndCast(joinType, c -> new JdbcJoinProcessor<E, P>(parent, c));
} else {
joinQuery =
ObjectUtils.applyAndCast(joinType, c -> new JdbcJoinProcessor<E, P>(parent, alias, c));
}
return joinQuery;
}
/**
* Initializes {@link org.lightmare.criteria.query.LambdaStream} implementation implementation for
* sub query expressions
*
* @param parent
* @param subType
* @return L {@link org.lightmare.criteria.query.LambdaStream} implementation
*/
protected static <P, E, S extends QueryStream<E, ? super S>> S initSubQuery(
AbstractQueryStream<P, ?, ?> parent, Class<E> subType) {
S query = ObjectUtils.applyAndCast(subType, c -> new JdbcSubQueryStream<E, P>(parent, c));
return query;
}
/**
* Clones passed {@link org.lightmare.criteria.tuples.QueryTuple} without throwing an exception
*
* @param instance
* @return {@link org.lightmare.criteria.tuples.QueryTuple} clone
*/
private static QueryTuple cloneTuple(QueryTuple instance) {
return ObjectUtils.applyAndCast(instance, c -> ObjectUtils.applyQuietly(c, QueryTuple::clone));
}