Class PropertyConstraint.Or

  • All Implemented Interfaces:
    PropertyConstraint
    Enclosing interface:
    PropertyConstraint

    public static class PropertyConstraint.Or
    extends Object
    implements PropertyConstraint
    A property constraint that accepts items iff they are accepted by either child constraints. This effectively matches the union of the items matched by the two constraints. Use this to combine multiple constraints. You can make one or both of the children Or instances if you need a wider union.
    Author:
    Matthew Pocock
    • Method Detail

      • getChild1

        public PropertyConstraint getChild1()
        Get the first child PropertyConstraint.
        Returns:
        the first child PropertyConstraint
      • getChild2

        public PropertyConstraint getChild2()
        Get the seccond child PropertyConstraint.
        Returns:
        the seccond child PropertyConstraint
      • accept

        public boolean accept​(Object object)
        Description copied from interface: PropertyConstraint
        accept returns true if the value fulfills the constraint. Manually compare items with the PropertyConstraint. Node: this will ususaly be done for you in an AnnotationType instance Use for implementing accept() on AnnotatoinType
        Specified by:
        accept in interface PropertyConstraint
        Parameters:
        object - an Object to check.
        Returns:
        a boolean.
      • subConstraintOf

        public boolean subConstraintOf​(PropertyConstraint pc)
        Description copied from interface: PropertyConstraint

        subConstraintOf returns true if the constraint is a sub-constraint.

        A pair of constraints super and sub are in a superConstraint/subConstraint relationship if every object accepted by sub is also accepted by super. To put it another way, if instanceOf was used as a set-membership indicator function over some set of objects, then the set produced by super would be a superset of that produced by sub.

        It is not expected that constraints will neccesarily maintain references to super/sub types. It will be more usual to infer this relationship by introspecting the constraints themselves. For example, PropertyConstraint.ByClass will infer subConstraintOf by looking at the possible class of all items matching subConstraint.

        Useful when attempting to compare two constraints to see if it is necisary to retain both. You may want to check the more general or the more specific constraint only.
        Specified by:
        subConstraintOf in interface PropertyConstraint
        Parameters:
        pc - a PropertyConstraint to check.
        Returns:
        a boolean.