org.jbpm.query.jpa.service

Interface QueryModificationService

public interface QueryModificationService

Implementations of this service are instantiated when available in order to extend the capabilities of particular QueryCriteriaUtil implemenations.

Method Summary

Modifier and Type	Method and Description
boolean	accepts(String listId)
<R> javax.persistence.criteria.Predicate	createPredicate(QueryCriteria criteria, javax.persistence.criteria.CriteriaQuery<R> query, javax.persistence.criteria.CriteriaBuilder builder) Create a specific Predicate based on the given QueryCriteria.
void	optimizeCriteria(QueryWhere queryWhere) This optimizes the QueryWhere criteria.

Method Detail

accepts

boolean accepts(String listId)

Parameters:

listId - The id of the QueryCriteria

Returns:

Whether or not this QueryModificationService can be used for the given listId.

optimizeCriteria

void optimizeCriteria(QueryWhere queryWhere)

This optimizes the QueryWhere criteria.

Parameters:

queryWhere - The QueryWhere instance with the abstract query information

createPredicate

<R> javax.persistence.criteria.Predicate createPredicate(QueryCriteria criteria,
                                                         javax.persistence.criteria.CriteriaQuery<R> query,
                                                         javax.persistence.criteria.CriteriaBuilder builder)

Create a specific Predicate based on the given QueryCriteria.

Parameters:

criteria - The QueryCriteria with the abstract query criteria information.

query - The CriteriaQuery instance being built.

builder - The CriteriaBuilder used to create the CriteriaQuery.

Returns:

The Predicate that will be added to the CriteriaQuery instance.