Package com.blazebit.persistence.querydsl

Class NotEmptySetVisitor

java.lang.Object

com.blazebit.persistence.querydsl.NotEmptySetVisitor

All Implemented Interfaces:

com.querydsl.core.types.Visitor<Boolean,Void>

public class NotEmptySetVisitor
extends Object

Visitor implementation that checks if a query is empty (i.e. has no default joins). Empty queries are removed from set operations, as they cannot be represented in SQL.

Since:

1.5.0

Author:

Jan-Willem Gmelig Meyling

Field Summary

Fields

Modifier and Type	Field	Description
static final NotEmptySetVisitor	INSTANCE

Constructor Summary

Constructors

Constructor	Description
NotEmptySetVisitor()

Method Summary

Modifier and Type	Method	Description
Boolean	visit(com.querydsl.core.types.Constant<?> constant, Void c)
Boolean	visit(com.querydsl.core.types.FactoryExpression<?> factoryExpression, Void c)
Boolean	visit(com.querydsl.core.types.Operation<?> operation, Void aVoid)
Boolean	visit(com.querydsl.core.types.ParamExpression<?> paramExpression, Void c)
Boolean	visit(com.querydsl.core.types.Path<?> path, Void c)
Boolean	visit(com.querydsl.core.types.SubQueryExpression<?> subQueryExpression, Void aVoid)
Boolean	visit(com.querydsl.core.types.TemplateExpression<?> templateExpression, Void c)

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final NotEmptySetVisitor INSTANCE

Constructor Details

NotEmptySetVisitor

public NotEmptySetVisitor()

Method Details

visit

public Boolean visit(com.querydsl.core.types.Operation<?> operation,
 Void aVoid)

Specified by:

visit in interface com.querydsl.core.types.Visitor<Boolean,Void>

visit

public Boolean visit(com.querydsl.core.types.SubQueryExpression<?> subQueryExpression,
 Void aVoid)

Specified by:

visit in interface com.querydsl.core.types.Visitor<Boolean,Void>

visit

public Boolean visit(com.querydsl.core.types.Constant<?> constant,
 Void c)

Specified by:

visit in interface com.querydsl.core.types.Visitor<R,C>

visit

public Boolean visit(com.querydsl.core.types.FactoryExpression<?> factoryExpression,
 Void c)

Specified by:

visit in interface com.querydsl.core.types.Visitor<R,C>

visit

public Boolean visit(com.querydsl.core.types.ParamExpression<?> paramExpression,
 Void c)

Specified by:

visit in interface com.querydsl.core.types.Visitor<R,C>

visit

public Boolean visit(com.querydsl.core.types.Path<?> path,
 Void c)

Specified by:

visit in interface com.querydsl.core.types.Visitor<R,C>

visit

public Boolean visit(com.querydsl.core.types.TemplateExpression<?> templateExpression,
 Void c)

Specified by:

visit in interface com.querydsl.core.types.Visitor<R,C>