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 NotEmptySetVisitor INSTANCE  

  • Constructor Summary

    Constructors 
    Constructor Description
    NotEmptySetVisitor()  

  • Method Summary

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

    Methods inherited from class java.lang.Object

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

  • Field Details

  • Constructor Details

  • 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 R visit​(com.querydsl.core.types.Constant<?> constant, C c)
      Specified by:
      visit in interface com.querydsl.core.types.Visitor<R,​C>

    • visit

      public R visit​(com.querydsl.core.types.FactoryExpression<?> factoryExpression, C c)
      Specified by:
      visit in interface com.querydsl.core.types.Visitor<R,​C>

    • visit

      public R visit​(com.querydsl.core.types.ParamExpression<?> paramExpression, C c)
      Specified by:
      visit in interface com.querydsl.core.types.Visitor<R,​C>

    • visit

      public R visit​(com.querydsl.core.types.Path<?> path, C c)
      Specified by:
      visit in interface com.querydsl.core.types.Visitor<R,​C>

    • visit

      public R visit​(com.querydsl.core.types.TemplateExpression<?> templateExpression, C c)
      Specified by:
      visit in interface com.querydsl.core.types.Visitor<R,​C>