Package org.apache.calcite.util

Class Filterator<E>

  • Type Parameters:
    E - Element type
    All Implemented Interfaces:
    java.util.Iterator<E>
    public class Filterator<E>
extends java.lang.Object
implements java.util.Iterator<E>
    Filtered iterator class: an iterator that includes only elements that are instanceof a specified class.

    Apologies for the dorky name.

    See Also:
    Util.cast(java.util.List, Class), Util.cast(Iterator, Class)

    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) java.lang.Class<E> includeFilter  
      (package private) java.util.Iterator<? extends java.lang.Object> iterator  
      (package private) E lookAhead  
      (package private) boolean ready  

    • Constructor Summary

      Constructors 
      Constructor Description
      Filterator​(java.util.Iterator<?> iterator, java.lang.Class<E> includeFilter)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean hasNext()  
      E next()  
      void remove()  

      • Methods inherited from class java.lang.Object

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

      • Methods inherited from interface java.util.Iterator

        forEachRemaining

    • Field Detail

      • includeFilter

        java.lang.Class<E> includeFilter

      • iterator

        java.util.Iterator<? extends java.lang.Object> iterator

      • lookAhead

        E lookAhead

      • ready

        boolean ready

    • Constructor Detail

      • Filterator

        public Filterator​(java.util.Iterator<?> iterator,
                  java.lang.Class<E> includeFilter)

    • Method Detail

      • hasNext

        public boolean hasNext()
        Specified by:
        hasNext in interface java.util.Iterator<E>

      • next

        public E next()
        Specified by:
        next in interface java.util.Iterator<E>

      • remove

        public void remove()
        Specified by:
        remove in interface java.util.Iterator<E>