Package net.sf.basedb.core.query
Interface Restriction
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- All Superinterfaces:
QueryElement
- All Known Implementing Classes:
AndRestriction
,AnnotationBetweenRestriction
,AnnotationInRestriction
,AnnotationRestriction
,AnnotationSet.ProjectSpecificAnnotationsRestriction
,AnnotationSimpleRestriction
,AnyToAnyRestriction
,BetweenRestriction
,ConditionalQueryElement
,DynamicRestriction
,EqRestriction
,GteqRestriction
,GtRestriction
,HasAnnotationRestriction
,HqlExpression
,InRestriction
,LikeRestriction
,LteqRestriction
,LtRestriction
,NeqRestriction
,NotRestriction
,OrRestriction
,PermissionRestriction
,RlikeRestriction
,SharedToRestriction
public interface Restriction extends QueryElement
A restriction query element. This is a query element that can appear in theWHERE
andHAVING
part of aQuery
. Typically a restriction consists of a condition which must be true for a row if it should be returned. For example:SELECT ... FROM ... WHERE id = 2
Implementation note! Do not create restrictions that use user input directly in the queries. Always create a parameter (
Expressions.parameter(String)
and use theQuery.setParameter(String, Object, Type)
method to specify the value. Using parameters also makes it possible to execute the same query multiple times with different parameter values.ItemQuery<User> query = User.getQuery(); query.restrict( Restrictions.eq( Hql.property("name"), Expressions.parameter("name") ) ); // Generated HQL SELECT usr FROM UserData usr WHERE usr.name = :name query.setParameter("name", "Nicklas"); List<User%gt; nicklasList = query.list(dc); query.setParameter("name", "Johan"); List<User> johanList = query.list(dc);
Restrictions can be created by the
Restrictions
factory class.- Version:
- 2.0
- Author:
- Nicklas
- See Also:
Restrictions
- Last modified
- $Date: 2015-04-21 09:59:42 +0200 (ti, 21 apr 2015) $
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Method Summary
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Methods inherited from interface net.sf.basedb.core.query.QueryElement
getChildren, toQl
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