Package org.apache.calcite.util

Class Util.FilteringIterator<T>

  • Type Parameters:
    T - Element type
    All Implemented Interfaces:
    java.util.Iterator<T>
    Enclosing class:
    Util
    private static class Util.FilteringIterator<T>
extends java.lang.Object
implements java.util.Iterator<T>
    Iterator that applies a predicate to each element.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) T current  
      private static java.lang.Object DUMMY  
      (package private) java.util.Iterator<? extends T> iterator  
      private java.util.function.Predicate<T> predicate  

    • Constructor Summary

      Constructors 
      Constructor Description
      FilteringIterator​(java.util.Iterator<? extends T> iterator, java.util.function.Predicate<T> predicate)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean hasNext()  
      protected T moveNext()  
      T next()  

      • 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, remove

    • Field Detail

      • DUMMY

        private static final java.lang.Object DUMMY

      • iterator

        final java.util.Iterator<? extends T> iterator

      • predicate

        private final java.util.function.Predicate<T> predicate

      • current

        T current

    • Constructor Detail

      • FilteringIterator

        FilteringIterator​(java.util.Iterator<? extends T> iterator,
                  java.util.function.Predicate<T> predicate)

    • Method Detail

      • hasNext

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

      • next

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

      • moveNext

        protected T moveNext()