Class DefFunction


  • public class DefFunction
    extends MultiFunction
    ValueSource implementation which only returns the values from the provided ValueSources which are available for a particular docId. Consequently, when combined with a ConstValueSource, this function serves as a way to return a default value when the values for a field are unavailable.
    • Constructor Detail

      • DefFunction

        public DefFunction​(java.util.List<ValueSource> sources)
    • Method Detail

      • name

        protected java.lang.String name()
        Specified by:
        name in class MultiFunction
      • getValues

        public FunctionValues getValues​(java.util.Map<java.lang.Object,​java.lang.Object> fcontext,
                                        LeafReaderContext readerContext)
                                 throws java.io.IOException
        Description copied from class: ValueSource
        Gets the values for this reader and the context that was previously passed to createWeight(). The values must be consumed in a forward docID manner, and you must call this method again to iterate through the values again.
        Specified by:
        getValues in class ValueSource
        Throws:
        java.io.IOException