Module org.apache.wicket.core
Package org.apache.wicket.model

Interface IModelComparator

All Superinterfaces:
IClusterable, Serializable
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface IModelComparator extends IClusterable
Implementations of this interface compare model object. The component is given so that a developer can choose what the previous object is The default implementation for form components is just component.getModelObject(); But developers can choose to keep the last rendered value for that component and compare this value with the newObject. So that it doesn't overwrite values for an object that was changed by another session if the current session didn't touch that specific value.
Author:
jcompagner, Jonathan Locke

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final IModelComparator
    ALWAYS_FALSE
    A model comparator that always returns false

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    compare(Component component, Object newObject)
     

  • Field Details

  • Method Details

    • compare

      boolean compare(Component component, Object newObject)
      Parameters:
      component - The component which received the new object
      newObject - The newObject
      Returns:
      True if the previous components object is the same as the newObject.