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:

java.util.Iterator<T>

public abstract class FilterIterator<T,InnerT extends T>
extends java.lang.Object
implements java.util.Iterator<T>

An Iterator implementation that filters elements with a boolean predicate.

See Also:

predicateFunction(InnerT)

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Iterator<InnerT>	iterator
private T	next
private boolean	nextIsSet

Constructor Summary

Constructors

Constructor and Description
FilterIterator(java.util.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()
private boolean	setNext()

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

iterator

private final java.util.Iterator<InnerT extends T> iterator

next

private T next

nextIsSet

private boolean nextIsSet

Constructor Detail

FilterIterator

public FilterIterator(java.util.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 java.util.Iterator<T>

next

public final T next()

Specified by:

next in interface java.util.Iterator<T>

remove

public final void remove()

Specified by:

remove in interface java.util.Iterator<T>

setNext

private boolean setNext()