org.proteios.core.query
Interface QueryElement

All Known Subinterfaces:

Expression, Join, Order, Restriction, Select

All Known Implementing Classes:

AddExpression, AndRestriction, AnnotationBetweenRestriction, AnnotationInRestriction, AnnotationSimpleRestriction, AscOrder, BetweenRestriction, CountExpression, DescOrder, DivideExpression, EqRestriction, ExpressionSelect, FloatExpression, GteqRestriction, GtRestriction, HqlElementsExpression, HqlEntityExpression, HqlIndexExpression, HqlInnerJoin, HqlLeftJoin, HqlPropertyExpression, HqlRightJoin, InRestriction, IntegerExpression, LikeRestriction, LogExpression, LteqRestriction, LtRestriction, MaxExpression, MeanExpression, MinExpression, MultiplyExpression, NegateExpression, NeqRestriction, NotRestriction, OrRestriction, ParameterExpression, SelectedExpression, SqrtExpression, SubtractExpression, SumExpression

public interface QueryElement

A query element is used in various places in a Query to build the structure of the query. A query element is by itself not useful, only the subtypes of this interface are.

Version:

2.0

Author:

Nicklas

Last modified

$Date: 2009-04-09 08:48:11 +0200 (Thu, 09 Apr 2009) $

Method Summary

String

toQl(Query query, DbControl dc) Create a query language string of the query element.

Method Detail

toQl

String toQl(Query query,
            DbControl dc)
            throws BaseException

Create a query language string of the query element. Use the Query.getQueryType() method to find out which query language is wanted in case the element requires different syntax for different languages.

Parameters:

query - The query that is about to be executed

dc - The DbControl object used to execute the query

Throws:

UnsupportedOperationException - If the requested query language is not supported by the query element

BaseException - If there is any other error