Module org.dellroad.querystream.jpa
Package org.dellroad.querystream.jpa

Class ExprRef<X>

java.lang.Object
org.dellroad.querystream.jpa.ExprRef<X>
Type Parameters:
X - stream item type
All Implemented Interfaces:
Ref<X,jakarta.persistence.criteria.Expression<X>>
public class ExprRef<X> extends Object
A Ref that's known to be an Expression.

  • Constructor Summary

    Constructors
    Constructor
    Description
    ExprRef()
    Create an instance with no name.
    ExprRef(String name)
    Create an instance with the given name.

  • Method Summary

    Modifier and Type
    Method
    Description
    jakarta.persistence.criteria.Expression<X>
    bind(jakarta.persistence.criteria.Expression<X> value)
    Bind the given value to this reference.
    jakarta.persistence.criteria.Expression<X>
    get()
    Get the bound value.
    boolean
    isBound()
    Determine if this instance is bound.
    String
    toString()
     
    void
    unbind()
    Unbind the bound value, if any.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • ExprRef

      public ExprRef()
      Create an instance with no name.

    • ExprRef

      public ExprRef(String name)
      Create an instance with the given name.

      The name is only used for debugging purposes.

      Parameters:
      name - reference name, or null for none

  • Method Details

    • bind

      public jakarta.persistence.criteria.Expression<X> bind(jakarta.persistence.criteria.Expression<X> value)
      Description copied from interface: Ref
      Bind the given value to this reference.
      Specified by:
      bind in interface Ref<X,S extends jakarta.persistence.criteria.Selection<X>>
      Parameters:
      value - value to bind
      Returns:
      same value

    • get

      public jakarta.persistence.criteria.Expression<X> get()
      Description copied from interface: Ref
      Get the bound value.
      Specified by:
      get in interface Ref<X,S extends jakarta.persistence.criteria.Selection<X>>
      Returns:
      bound value

    • unbind

      public void unbind()
      Description copied from interface: Ref
      Unbind the bound value, if any.
      Specified by:
      unbind in interface Ref<X,S extends jakarta.persistence.criteria.Selection<X>>

    • isBound

      public boolean isBound()
      Description copied from interface: Ref
      Determine if this instance is bound.
      Specified by:
      isBound in interface Ref<X,S extends jakarta.persistence.criteria.Selection<X>>
      Returns:
      true if this instance is bound, otherwise false

    • toString

      public String toString()
      Overrides:
      toString in class Object