Package org.eclipse.persistence.jpa.jpql.utility.filter

Class NullFilter

  • All Implemented Interfaces:
    Filter<java.lang.Object>
    public final class NullFilter
extends java.lang.Object
implements Filter<java.lang.Object>
    A null implementation of a Filter. The singleton instance can be typed cast properly when using generics.
    Version:
    2.3
    Author:
    Pascal Filion
    Since:
    2.3

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean accept​(java.lang.Object value)
      Determines whether the specified object is "accepted" by the filter.
      static <T> Filter<T> instance()
      Returns the singleton instance of this NullFilter.
      java.lang.String toString()

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • instance

        public static <T> Filter<T> instance()
        Returns the singleton instance of this NullFilter.
        Returns:
        The singleton instance

      • accept

        public boolean accept​(java.lang.Object value)
        Determines whether the specified object is "accepted" by the filter. The semantics of "accept" is determined by the contract between the client and the server.
        Specified by:
        accept in interface Filter<java.lang.Object>
        Parameters:
        value - The value to filter
        Returns:
        true if the given value is "accepted" by this filter; false if it was "rejected"

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object