Class Fact

  • All Implemented Interfaces:
    java.io.Serializable

    public final class Fact
    extends java.lang.Object
    implements java.io.Serializable
    Represents a contextual artifact, which can be any serializable object, useful for making a Decision. Facts are key-value pairs, where the key is a String (message key) and the value is an arbitrary object. Generally, the supplied object's toString() method should return a human-readable String. Facts are immutable objects.
    Since:
    2.5
    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Constructor Description
      Fact​(java.lang.String messageKey, java.io.Serializable value)
      Constructs a new Fact with a supplied message key and value.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object obj)
      Two Facts are considered equal if their message keys and value objects are equal.
      java.lang.String getMessageKey()
      Returns this Fact's name, as represented an i18n message key.
      java.io.Serializable getValue()
      Returns this Fact's value.
      int hashCode()
      java.lang.String toString()
      Returns a String representation of this Fact.
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
    • Constructor Detail

      • Fact

        public Fact​(java.lang.String messageKey,
                    java.io.Serializable value)
        Constructs a new Fact with a supplied message key and value.
        Parameters:
        messageKey - the "name" of this fact, which should be an i18n message key
        value - the object to associate with the name
    • Method Detail

      • getMessageKey

        public java.lang.String getMessageKey()
        Returns this Fact's name, as represented an i18n message key.
        Returns:
        the message key
      • getValue

        public java.io.Serializable getValue()
        Returns this Fact's value.
        Returns:
        the value object
      • equals

        public boolean equals​(java.lang.Object obj)
        Two Facts are considered equal if their message keys and value objects are equal.
        Overrides:
        equals in class java.lang.Object
        Parameters:
        obj - the object to test
        Returns:
        true if logically equal, false if not
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object
      • toString

        public java.lang.String toString()
        Returns a String representation of this Fact.
        Overrides:
        toString in class java.lang.Object
        Returns:
        the representation