org.cyclos.impl.utils

Class QueryHelper

java.lang.Object

org.cyclos.impl.utils.QueryHelper

public class QueryHelper
extends java.lang.Object

Contains helper methods for querydsl

Author:

luis

Constructor Summary

Constructors

Constructor and Description
QueryHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static com.mysema.query.types.Expression<java.lang.Double>	days(com.mysema.query.types.Path<TimeInterval> path) Returns an expression which represents the number of days on this interval
static <RT,Q extends com.mysema.query.support.ProjectableQuery<Q>> Page<RT>	page(Q query, SessionData sessionData, java.lang.Integer currentPage, java.lang.Integer pageSize, com.mysema.query.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.mysema.query.support.ProjectableQuery<Q>> Page<RT>	page(Q query, SessionData sessionData, QueryParameters queryParameters, com.mysema.query.types.Expression<RT> expr) Returns a result page for the given query and page parameters, using the given expression for projection
static <T> com.mysema.query.types.path.PathBuilder<T>	pathBuilder(java.lang.Class<T> clazz) Returns a path builder for the given entity class
static <T> long	processBatch(org.cyclos.impl.utils.persistence.BaseEntityManagerHandler entityManagerHandler, com.mysema.commons.lang.CloseableIterator<T> iterator, org.apache.commons.collections15.Closure<T> closure) Processes the given iterator, by using a CacheFlusher, and invoking the given closure for each iterator element.
static boolean	useParameter(java.lang.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

days

public static com.mysema.query.types.Expression<java.lang.Double> days(com.mysema.query.types.Path<TimeInterval> path)

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

page

public static <RT,Q extends com.mysema.query.support.ProjectableQuery<Q>> Page<RT> page(Q query,
                                                                        SessionData sessionData,
                                                                        java.lang.Integer currentPage,
                                                                        java.lang.Integer pageSize,
                                                                        com.mysema.query.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.mysema.query.support.ProjectableQuery<Q>> Page<RT> page(Q query,
                                                                        SessionData sessionData,
                                                                        QueryParameters queryParameters,
                                                                        com.mysema.query.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.mysema.query.types.path.PathBuilder<T> pathBuilder(java.lang.Class<T> clazz)

Returns a path builder for the given entity class

processBatch

public static <T> long processBatch(org.cyclos.impl.utils.persistence.BaseEntityManagerHandler entityManagerHandler,
                    com.mysema.commons.lang.CloseableIterator<T> iterator,
                    org.apache.commons.collections15.Closure<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

useParameter

public static boolean useParameter(java.lang.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.