Class TaskAuditQueryModificationService

  • All Implemented Interfaces:
    org.jbpm.query.jpa.service.QueryModificationService

    public class TaskAuditQueryModificationService
    extends Object
    implements org.jbpm.query.jpa.service.QueryModificationService
    A QueryModificationService instace for the jbpm-human-task-audit module
    • Constructor Detail

      • TaskAuditQueryModificationService

        public TaskAuditQueryModificationService()
    • Method Detail

      • accepts

        public boolean accepts​(String listId)
        Specified by:
        accepts in interface org.jbpm.query.jpa.service.QueryModificationService
      • optimizeCriteria

        public void optimizeCriteria​(org.jbpm.query.jpa.data.QueryWhere queryWhere)
        Specified by:
        optimizeCriteria in interface org.jbpm.query.jpa.service.QueryModificationService
      • optimizeCriteria

        public void optimizeCriteria​(List<org.jbpm.query.jpa.data.QueryCriteria> criteriaList)
        This method combines multiple intersecting TaskVariableImpl criteria in order to make sure that the number of (TaskVariableImpl) subqueries created is minimal.

        The following logic is applied:

        Go through the given list of QueryCriteria and if an intersecting group or criteria contains multiple TaskVariableImpl criteria, then replace those task variable criteria with a single "combined" task variable criteria. This is then later processed correctly so as to create only one subquery.

        Obviously, if we run into a group criteria, recurse.

        Continue to go through the criteria list until we've reached the end of the list: the loop might have broken off earlier because it hit a union criteria and stopped to process group of intersecting task variable criteria that had already been found. With the successive loops, all intersecting groups containing task variable criteria will have been removed, allowing the last loop to reach the end of the list.
        Parameters:
        criteriaList - The list of QueryCriteria to process
      • createPredicate

        public <R> javax.persistence.criteria.Predicate createPredicate​(org.jbpm.query.jpa.data.QueryCriteria criteria,
                                                                        javax.persistence.criteria.CriteriaQuery<R> query,
                                                                        javax.persistence.criteria.CriteriaBuilder builder)
        Specified by:
        createPredicate in interface org.jbpm.query.jpa.service.QueryModificationService