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:

predicateFunction(InnerT)

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor and Description
FilterIterator(Iterator<InnerT> baseIterator)

Method Summary

Modifier and Type	Method and Description
boolean	hasNext()
T	next()
protected abstract boolean	predicateFunction(InnerT object) returns true, if this element should be returned by 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

Constructor Detail

FilterIterator

public FilterIterator(Iterator<InnerT> baseIterator)

Method Detail

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>