cz.encircled.joiner.core

Interface PredicateAliasResolver

All Known Implementing Classes:

DefaultPredicateAliasResolver

public interface PredicateAliasResolver

Implementation is responsible for predicate aliases lookup in a query

Author:

Vlad on 10-Feb-17.

Method Summary

Modifier and Type	Method and Description
com.querydsl.core.types.Predicate	resolveOperation(com.querydsl.core.types.Operation<?> operation, List<JoinDescription> joins, Set<com.querydsl.core.types.Path<?>> usedAliases) Resolves all correct paths used in specified operation
<T> com.querydsl.core.types.Path<T>	resolvePath(com.querydsl.core.types.Path<T> path, Map<AnnotatedElement,List<JoinDescription>> classToJoin, Set<com.querydsl.core.types.Path<?>> usedAliases) If alias from path is not present in usedAliases, try to find it in joins.
com.querydsl.core.types.Predicate	resolvePredicate(com.querydsl.core.types.Predicate predicate, List<JoinDescription> joins, Set<com.querydsl.core.types.Path<?>> usedAliases) Resolves all correct paths used in specified predicate

Method Detail

resolvePredicate

com.querydsl.core.types.Predicate resolvePredicate(com.querydsl.core.types.Predicate predicate,
                                                   List<JoinDescription> joins,
                                                   Set<com.querydsl.core.types.Path<?>> usedAliases)

Resolves all correct paths used in specified predicate

Parameters:

predicate - original predicate

joins - all query joins

usedAliases - paths that are present in joins

Returns:

rebuilt predicate

See Also:

resolvePath(Path, Map, Set)

resolveOperation

com.querydsl.core.types.Predicate resolveOperation(com.querydsl.core.types.Operation<?> operation,
                                                   List<JoinDescription> joins,
                                                   Set<com.querydsl.core.types.Path<?>> usedAliases)

Resolves all correct paths used in specified operation

Parameters:

operation - original operation

joins - all query joins

usedAliases - paths that are present in joins

Returns:

rebuilt predicate

See Also:

resolvePath(Path, Map, Set)

resolvePath

<T> com.querydsl.core.types.Path<T> resolvePath(com.querydsl.core.types.Path<T> path,
                                                Map<AnnotatedElement,List<JoinDescription>> classToJoin,
                                                Set<com.querydsl.core.types.Path<?>> usedAliases)

If alias from path is not present in usedAliases, try to find it in joins. If unambiguous alias is found, return rebuilt Path with corresponding alias.

It other words, it allows to use QStatus.status.some... instead of J#path(QStatusParent.parent, QStatus.status (when target path is unambiguous, i.e. exactly one join with java type Status is present)

Type Parameters:

T - any

Parameters:

path - original path

classToJoin - java type to present joins

usedAliases - paths that are present in joins

Returns:

rebuilt or original path