Package org.cyclos.impl.utils

Class QueryHelper

java.lang.Object

org.cyclos.impl.utils.QueryHelper

public class QueryHelper
extends Object

Contains helper methods for querydsl

Constructor Summary

Constructors

Constructor	Description
QueryHelper()

Method Summary

Modifier and Type	Method	Description
static void	applyMaxResultsOnMap(SessionData sessionData, QueryParameters params)	When the given query parameter has no page size, or it is greater than max results on map, set the page size = max results on map.
static <T> Page<T>	buildPage(SessionData sessionData, List<T> list, Integer _pageSize, Integer _currentPage)	Builds a page from an in-memory list
static <T> Page<T>	buildPage(SessionData sessionData, List<T> list, QueryParameters params)	Builds a page from an in-memory list
static com.querydsl.core.types.Expression<Double>	days(com.querydsl.core.types.Path<TimeInterval> path)	Returns an expression which represents the number of days on this interval
static <T> Page<T>	emptyPage(SessionData sessionData, Integer _pageSize, Integer _currentPage)	Builds an empty page
static <T> Page<T>	emptyPage(SessionData sessionData, QueryParameters params)	Builds an empty page
static <E extends Enum<E>> com.querydsl.core.types.dsl.NumberExpression<Integer>	enumOrdinal(com.querydsl.core.types.dsl.EnumPath<E> path)	Returns an expression that maps each enum value to its ordinal
static String	getUserDisplay(SessionData sessionData, Long userId, String brokerIds, String displayForManagers, String displayForOthers)	Resolve the user display
static boolean	isUnlimited(QueryParameters params)
static <Q extends QueryParameters> Q	newQuery(Class<Q> type)	Initializes an empty query of the given type, with both current page and page size filled in
static com.querydsl.core.types.OrderSpecifier<?>	orderSpecifier(com.querydsl.core.types.EntityPath<?> path)	Returns an ascending order specifier suitable for the given entity path.
static com.querydsl.core.types.OrderSpecifier<?>	orderSpecifier(com.querydsl.core.types.EntityPath<?> path, boolean asc)	Returns an order specifier suitable for the given entity path.
static <RT,Q extends com.querydsl.jpa.JPAQueryBase<?,Q>> Page<RT>	page(Q query, SessionData sessionData, Integer _currentPage, Integer _pageSize, boolean skipTotalCount, com.querydsl.core.types.Expression<RT> expr)	Returns a result page for the given query and page parameters, using the given expression for projection
static <RT,Q extends com.querydsl.jpa.JPAQueryBase<?,Q>> Page<RT>	page(Q query, SessionData sessionData, QueryParameters queryParameters, com.querydsl.core.types.Expression<RT> expr)	Returns a result page for the given query and page parameters, using the given expression for projection
static <T> com.querydsl.core.types.dsl.PathBuilder<T>	pathBuilder(Class<T> clazz)	Returns a path builder for the given entity class
static <T> long	processBatch(BaseEntityManagerHandler entityManagerHandler, Iterator<T> iterator, Consumer<T> closure)	Processes the given iterator, by using a CacheFlusher, and invoking the given closure for each iterator element.
static boolean	useAnyParameter(Collection<Object> values)	Returns true if any of the given values should be used to filter the query.
static boolean	useParameter(Object value)	Returns whether the parameter should be used to filter the query or not.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryHelper

public QueryHelper()

Method Detail

applyMaxResultsOnMap

public static void applyMaxResultsOnMap(SessionData sessionData,
                                        QueryParameters params)

When the given query parameter has no page size, or it is greater than max results on map, set the page size = max results on map.

buildPage

public static <T> Page<T> buildPage(SessionData sessionData,
                                    List<T> list,
                                    Integer _pageSize,
                                    Integer _currentPage)

Builds a page from an in-memory list

buildPage

public static <T> Page<T> buildPage(SessionData sessionData,
                                    List<T> list,
                                    QueryParameters params)

Builds a page from an in-memory list

days

public static com.querydsl.core.types.Expression<Double> days(com.querydsl.core.types.Path<TimeInterval> path)

Returns an expression which represents the number of days on this interval

emptyPage

public static <T> Page<T> emptyPage(SessionData sessionData,
                                    Integer _pageSize,
                                    Integer _currentPage)

Builds an empty page

emptyPage

public static <T> Page<T> emptyPage(SessionData sessionData,
                                    QueryParameters params)

Builds an empty page

enumOrdinal

public static <E extends Enum<E>> com.querydsl.core.types.dsl.NumberExpression<Integer> enumOrdinal(com.querydsl.core.types.dsl.EnumPath<E> path)

Returns an expression that maps each enum value to its ordinal

getUserDisplay

public static String getUserDisplay(SessionData sessionData,
                                    Long userId,
                                    String brokerIds,
                                    String displayForManagers,
                                    String displayForOthers)

Resolve the user display

Parameters:

sessionData - The logged user's session data

userId - The user id to check

brokerIds - The de-normalized list of broker ids of the user to check

displayForManagers - The display for managers of the user to check

displayForOthers - The display for others of the user to check

isUnlimited

public static boolean isUnlimited(QueryParameters params)

newQuery

public static <Q extends QueryParameters> Q newQuery(Class<Q> type)

Initializes an empty query of the given type, with both current page and page size filled in

orderSpecifier

public static com.querydsl.core.types.OrderSpecifier<?> orderSpecifier(com.querydsl.core.types.EntityPath<?> path)

Returns an ascending order specifier suitable for the given entity path. The attempted properties are .

orderSpecifier

public static com.querydsl.core.types.OrderSpecifier<?> orderSpecifier(com.querydsl.core.types.EntityPath<?> path,
                                                                       boolean asc)

Returns an order specifier suitable for the given entity path. The attempted properties are .

page

public static <RT,Q extends com.querydsl.jpa.JPAQueryBase<?,Q>> Page<RT> page(Q query,
                                                                                          SessionData sessionData,
                                                                                          Integer _currentPage,
                                                                                          Integer _pageSize,
                                                                                          boolean skipTotalCount,
                                                                                          com.querydsl.core.types.Expression<RT> expr)

Returns a result page for the given query and page parameters, using the given expression for projection

page

public static <RT,Q extends com.querydsl.jpa.JPAQueryBase<?,Q>> Page<RT> page(Q query,
                                                                                          SessionData sessionData,
                                                                                          QueryParameters queryParameters,
                                                                                          com.querydsl.core.types.Expression<RT> expr)

Returns a result page for the given query and page parameters, using the given expression for projection

pathBuilder

public static <T> com.querydsl.core.types.dsl.PathBuilder<T> pathBuilder(Class<T> clazz)

Returns a path builder for the given entity class

processBatch

public static <T> long processBatch(BaseEntityManagerHandler entityManagerHandler,
                                    Iterator<T> iterator,
                                    Consumer<T> closure)

Processes the given iterator, by using a CacheFlusher, and invoking the given closure for each iterator element. The CloseableIterator.close() method is guaranteed to be invoked

useAnyParameter

public static boolean useAnyParameter(Collection<Object> values)

Returns true if any of the given values should be used to filter the query. See useParameter(Object value)

useParameter

public static boolean useParameter(Object value)

Returns whether the parameter should be used to filter the query or not. If the value is "empty" the query must not add a filter with the specified value.