to.etc.domui.hibernate.model

Class CriteriaCreatingVisitor

java.lang.Object

to.etc.domui.hibernate.model.CriteriaCreatingVisitor

All Implemented Interfaces:

to.etc.webapp.query.QNodeVisitor

public class CriteriaCreatingVisitor
extends Object
implements to.etc.webapp.query.QNodeVisitor

Thingy which creates a Hibernate Criteria thingy from a generic query. This is harder than it looks because the Criteria and DetachedCriteria kludge and Hibernate's metadata dungheap makes generic work very complex and error-prone.

It might be a better idea to start generating SQL from here, using Hibernate internal code to instantiate the query's result only.

Please look a Bug 640 for more details, and see the wiki page http://info.etc.to/xwiki/bin/view/Main/UIAbstractDatabase for more details on the working of all this.

Author:

Frits Jalvingh Created on Jun 24, 2008

Constructor Summary

Constructors

Constructor and Description
CriteriaCreatingVisitor(org.hibernate.Session ses, org.hibernate.Criteria crit)

Method Summary

Modifier and Type	Method and Description
void	checkHibernateClass(Class<?> clz) Does a check to see if the class is a persistent class- because Hibernate itself is too bloody stupid to do it.
void	visitBetween(to.etc.webapp.query.QBetweenNode n)
void	visitCriteria(to.etc.webapp.query.QCriteria<?> qc)
void	visitExistsSubquery(to.etc.webapp.query.QExistsSubquery<?> q) Child-related subquery: determine existence of children having certain characteristics.
void	visitLiteral(to.etc.webapp.query.QLiteral n)
void	visitMulti(to.etc.webapp.query.QMultiNode inn) Compound.
void	visitMultiSelection(to.etc.webapp.query.QMultiSelection n)
void	visitOrder(to.etc.webapp.query.QOrder o)
void	visitOrderList(List<to.etc.webapp.query.QOrder> orderlist)
void	visitPropertyComparison(to.etc.webapp.query.QPropertyComparison n)
void	visitPropertyIn(to.etc.webapp.query.QPropertyIn n)
void	visitPropertyJoinComparison(to.etc.webapp.query.QPropertyJoinComparison comparison)
void	visitPropertySelection(to.etc.webapp.query.QPropertySelection n)
void	visitRestrictionsBase(to.etc.webapp.query.QCriteriaQueryBase<?> n)
void	visitSelection(to.etc.webapp.query.QSelection<?> s)
void	visitSelectionColumn(to.etc.webapp.query.QSelectionColumn n)
void	visitSelectionColumns(to.etc.webapp.query.QSelection<?> s)
void	visitSelectionItem(to.etc.webapp.query.QSelectionItem n)
void	visitSelectionSubquery(to.etc.webapp.query.QSelectionSubquery n) Render a non-correlated subquery (the subquery has no references to the parent).
void	visitSqlRestriction(to.etc.webapp.query.QSqlRestriction v)
void	visitSubquery(to.etc.webapp.query.QSubQuery<?,?> n) This handles rendering of a correlated subquery.
void	visitUnaryNode(to.etc.webapp.query.QUnaryNode n)
void	visitUnaryProperty(to.etc.webapp.query.QUnaryProperty n)

Methods inherited from class java.lang.Object

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

Constructor Detail

CriteriaCreatingVisitor

public CriteriaCreatingVisitor(org.hibernate.Session ses,
                               org.hibernate.Criteria crit)

Method Detail

checkHibernateClass

public void checkHibernateClass(Class<?> clz)

Does a check to see if the class is a persistent class- because Hibernate itself is too bloody stupid to do it. Querying an unknown class in Hibernate will return an empty result set, sigh.

Parameters:

clz -

visitRestrictionsBase

public void visitRestrictionsBase(to.etc.webapp.query.QCriteriaQueryBase<?> n)
                           throws Exception

Specified by:

visitRestrictionsBase in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitCriteria

public void visitCriteria(to.etc.webapp.query.QCriteria<?> qc)
                   throws Exception

Specified by:

visitCriteria in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitPropertyComparison

public void visitPropertyComparison(to.etc.webapp.query.QPropertyComparison n)
                             throws Exception

Specified by:

visitPropertyComparison in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitPropertyIn

public void visitPropertyIn(@Nonnull
                            to.etc.webapp.query.QPropertyIn n)
                     throws Exception

Specified by:

visitPropertyIn in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitBetween

public void visitBetween(to.etc.webapp.query.QBetweenNode n)
                  throws Exception

Specified by:

visitBetween in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitMulti

public void visitMulti(to.etc.webapp.query.QMultiNode inn)
                throws Exception

Compound. Ands and ors.

Specified by:

visitMulti in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

See Also:

QNodeVisitorBase.visitMulti(to.etc.webapp.query.QMultiNode)

visitOrder

public void visitOrder(to.etc.webapp.query.QOrder o)
                throws Exception

Specified by:

visitOrder in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitUnaryNode

public void visitUnaryNode(to.etc.webapp.query.QUnaryNode n)
                    throws Exception

Specified by:

visitUnaryNode in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitSqlRestriction

public void visitSqlRestriction(@Nonnull
                                to.etc.webapp.query.QSqlRestriction v)
                         throws Exception

Specified by:

visitSqlRestriction in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitUnaryProperty

public void visitUnaryProperty(to.etc.webapp.query.QUnaryProperty n)
                        throws Exception

Specified by:

visitUnaryProperty in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitLiteral

public void visitLiteral(to.etc.webapp.query.QLiteral n)
                  throws Exception

Specified by:

visitLiteral in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitExistsSubquery

public void visitExistsSubquery(to.etc.webapp.query.QExistsSubquery<?> q)
                         throws Exception

Child-related subquery: determine existence of children having certain characteristics. Because the worthless Hibernate "meta model" API and the utterly disgusting way that mapping data is "stored" in Hibernate we resort to getting the generic type of the child property's collection to determine the type where the subquery is executed on.

Specified by:

visitExistsSubquery in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

See Also:

QNodeVisitorBase.visitExistsSubquery(to.etc.webapp.query.QExistsSubquery)

visitMultiSelection

public void visitMultiSelection(to.etc.webapp.query.QMultiSelection n)
                         throws Exception

Specified by:

visitMultiSelection in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitSelection

public void visitSelection(to.etc.webapp.query.QSelection<?> s)
                    throws Exception

Specified by:

visitSelection in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitSelectionColumn

public void visitSelectionColumn(to.etc.webapp.query.QSelectionColumn n)
                          throws Exception

Specified by:

visitSelectionColumn in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitSelectionItem

public void visitSelectionItem(to.etc.webapp.query.QSelectionItem n)
                        throws Exception

Specified by:

visitSelectionItem in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitPropertySelection

public void visitPropertySelection(to.etc.webapp.query.QPropertySelection n)
                            throws Exception

Specified by:

visitPropertySelection in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitSubquery

public void visitSubquery(@Nonnull
                          to.etc.webapp.query.QSubQuery<?,?> n)
                   throws Exception

This handles rendering of a correlated subquery.

Specified by:

visitSubquery in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

See Also:

QNodeVisitor.visitSubquery(to.etc.webapp.query.QSubQuery)

visitSelectionSubquery

public void visitSelectionSubquery(@Nonnull
                                   to.etc.webapp.query.QSelectionSubquery n)
                            throws Exception

Render a non-correlated subquery (the subquery has no references to the parent). This is legacy as it should be the same as correlated.

Specified by:

visitSelectionSubquery in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

See Also:

QNodeVisitor.visitSelectionSubquery(to.etc.webapp.query.QSelectionSubquery)

visitPropertyJoinComparison

public void visitPropertyJoinComparison(@Nonnull
                                        to.etc.webapp.query.QPropertyJoinComparison comparison)
                                 throws Exception

Specified by:

visitPropertyJoinComparison in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitOrderList

public void visitOrderList(@Nonnull
                           List<to.etc.webapp.query.QOrder> orderlist)
                    throws Exception

Specified by:

visitOrderList in interface to.etc.webapp.query.QNodeVisitor

Throws:

Exception

visitSelectionColumns

public void visitSelectionColumns(@Nonnull
                                  to.etc.webapp.query.QSelection<?> s)
                           throws Exception

Throws:

Exception