to.etc.webapp.query

Class QExistsSubquery<T>

java.lang.Object

to.etc.webapp.query.QNodeBase

to.etc.webapp.query.QOperatorNode

to.etc.webapp.query.QExistsSubquery<T>

Type Parameters:

T - The type of the child record persistent class, so the T from the List getChildList() in this subquery's parent.

public class QExistsSubquery<T>
extends QOperatorNode

Represents an "exists" subquery on some child relation of a record. This is always defined as a subquery on a parent record's child-record-set, and it adds requirements on the existence of children having certain restrictions. This should be rendered as a joined-subquery, like:

  [[select xxx from parent_table p where ...]] - rendered above this
  exists (select 1 from child_table a where a.pk = p.fk and [[conditions in this node]]).
 

Author:

Frits Jalvingh Created on Dec 22, 2009

Constructor Summary

Constructors

Constructor and Description
QExistsSubquery(QRestrictor<?> parent, Class<T> baseClass, String property)

Method Summary

Modifier and Type	Method and Description
QExistsSubquery<T>	dup()
Class<?>	getBaseClass()
String	getParentProperty()
QRestrictor<?>	getParentQuery()
QOperatorNode	getRestrictions()
void	setRestrictions(QOperatorNode restrictions)
void	visit(QNodeVisitor v)

Methods inherited from class to.etc.webapp.query.QOperatorNode

getOperation, prune

Methods inherited from class to.etc.webapp.query.QNodeBase

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

QExistsSubquery

public QExistsSubquery(QRestrictor<?> parent,
                       Class<T> baseClass,
                       String property)

Method Detail

dup

public QExistsSubquery<T> dup()

Specified by:

dup in class QOperatorNode

getParentQuery

public QRestrictor<?> getParentQuery()

getBaseClass

public Class<?> getBaseClass()

getParentProperty

public String getParentProperty()

getRestrictions

public QOperatorNode getRestrictions()

setRestrictions

public void setRestrictions(QOperatorNode restrictions)

visit

public void visit(@Nonnull
                  QNodeVisitor v)
           throws Exception

Specified by:

visit in class QNodeBase

Throws:

Exception