pro.taskana

Interface BaseQuery<T>

Type Parameters:

T - specifies the return type of the follwing methods

All Known Subinterfaces:

ClassificationQuery, ObjectReferenceQuery, TaskQuery, WorkbasketAccessItemQuery, WorkbasketQuery

All Known Implementing Classes:

ClassificationQueryImpl, ObjectReferenceQueryImpl, TaskQueryImpl, WorkbasketAccessItemQueryImpl, WorkbasketQueryImpl

public interface BaseQuery<T>

Main query interface.

Author:

EH

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	BaseQuery.SortDirection Determines the sort direction.

Method Summary

Modifier and Type	Method and Description
long	count() Counting the amount of rows/results for the current query.
List<T>	list() This method will return a list of defined T objects.
List<T>	list(int offset, int limit) This method will return a list of defined T objects with specified offset and an limit.
default List<T>	listPage(int pageNumber, int pageSize) This method will return all results for page X with a size of Y of the current query. Negative pageNumber/size will be changed to 1 or 0 and the last page might contains less elements.
List<String>	listValues(String dbColumnName, BaseQuery.SortDirection sortDirection) This method will return all currently existing values of a DB-Table once.
T	single() This method will return a single object of T.

Method Detail

list

List<T> list()

This method will return a list of defined T objects. In case of a TaskQuery, this method can throw a NotAuthorizedToQueryWorkbasketException.

Returns:

List containing elements of type T

list

List<T> list(int offset,
             int limit)

This method will return a list of defined T objects with specified offset and an limit. In case of a TaskQuery, this method can throw a NotAuthorizedToQueryWorkbasketException.

Parameters:

offset - index of the first element which should be returned.

limit - number of elements which should be returned beginning with offset.

Returns:

List containing elements of type T

listValues

List<String> listValues(String dbColumnName,
                        BaseQuery.SortDirection sortDirection)

This method will return all currently existing values of a DB-Table once. The order of the returning values can be configured ASC oder DEC - DEFAULT at NULL is ASC.
All called orderBy()-Methods will be override. Just the current column-values will be ordered itself by the given direction.

Parameters:

dbColumnName - column name of a existing DB Table.

sortDirection - Determines whether the result is sorted in ascending or descending order. If sortDirection is null, the result is sorted in ascending order

Returns:

a list of all existing values.

listPage

default List<T> listPage(int pageNumber,
                         int pageSize)

This method will return all results for page X with a size of Y of the current query.
Negative pageNumber/size will be changed to 1 or 0 and the last page might contains less elements. In case of a TaskQuery, this method can throw a NotAuthorizedToQueryWorkbasketException.

Parameters:

pageNumber - current pagination page starting at 1.

pageSize - amount of elements for this page.

Returns:

resulList for the current query starting at X and returning max Y elements.

single

T single()

This method will return a single object of T. In case of a TaskQuery, this method can throw a NotAuthorizedToQueryWorkbasketException.

Returns:

T a single object of given Type.

count

long count()

Counting the amount of rows/results for the current query. This can be used for a pagination afterwards. In case of a TaskQuery, this method can throw a NotAuthorizedToQueryWorkbasketException.

Returns:

resultRowCount