Package org.apache.lucene.util

Class FilterIterator<T,InnerT extends T>

java.lang.Object
org.apache.lucene.util.FilterIterator<T,InnerT>
Type Parameters:
T - generic parameter for this iterator instance: this iterator implements Iterator<T>
InnerT - generic parameter of the wrapped iterator, must be T or extend T
All Implemented Interfaces:
Iterator<T>
public abstract class FilterIterator<T,InnerT extends T> extends Object implements Iterator<T>
An Iterator implementation that filters elements with a boolean predicate.
See Also:
NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

  • Constructor Details

    • FilterIterator

      public FilterIterator(Iterator<InnerT> baseIterator)

  • Method Details

    • predicateFunction

      protected abstract boolean predicateFunction(InnerT object)
      returns true, if this element should be returned by next().

    • hasNext

      public final boolean hasNext()
      Specified by:
      hasNext in interface Iterator<T>

    • next

      public final T next()
      Specified by:
      next in interface Iterator<T>

    • remove

      public final void remove()
      Specified by:
      remove in interface Iterator<T>