/**
* 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;
}
/**
* Gets appropriated {@link org.lightmare.criteria.tuples.QueryTuple} from serialized lambda cache
* or analyzes appropriated lambda expression from compiled class
*
* @param method
* @return {@link org.lightmare.criteria.tuples.QueryTuple} from cache
*/
private static QueryTuple getByLambda(Serializable method) {
QueryTuple tuple;
LambdaInfo lambda = LambdaReplacements.getReplacement(method);
tuple = ObjectUtils.callOrInit(lambda, QueryCache::getQuery, LambdaUtils::resolvefromLambda);
return tuple;
}
/**
* 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));
}
/**
* Gets appropriated {@link org.lightmare.criteria.tuples.QueryTuple} from cache or initializes
* and caches new instance
*
* @param method
* @return {@link org.lightmare.criteria.tuples.QueryTuple} from cache
*/
public static QueryTuple getOrInit(Serializable method) {
return ObjectUtils.applyNonNull(
method, LambdaUtils::getOrInitOriginal, LambdaUtils::cloneTuple);
}
/**
* Sets generic parameters to passed {@link org.lightmare.criteria.tuples.QueryTuple} by entity
* {@link Class} instance if it is not <code>null</code>
*
* @param type
* @param tuple
*/
public static void setGenericIfValid(Class<?> type, QueryTuple tuple) {
ObjectUtils.nonNull(tuple, c -> setGenericType(type, c));
}
/**
* Gets appropriated {@link org.lightmare.criteria.tuples.QueryTuple} from cache or initializes
* and caches new instance
*
* @param method
* @return {@link org.lightmare.criteria.tuples.QueryTuple} from cache
*/
private static QueryTuple getOrInitOriginal(Serializable method) {
return ObjectUtils.callOrInit(method, LambdaCache::getByInstance, LambdaUtils::initAndCache);
}
