org.apache.sshd.common.util.helper

Class LazyMatchingTypeIterator<T>

java.lang.Object

org.apache.sshd.common.util.helper.LazyMatchingTypeIterator<T>

Type Parameters:

T - Type of iterated element

All Implemented Interfaces:

java.util.Iterator<T>

public class LazyMatchingTypeIterator<T>
extends java.lang.Object
implements java.util.Iterator<T>

An Iterator that selects only objects of a certain type from the underlying available ones. The "lazy" denomination is due to the fact that selection occurs only when hasNext() is called

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	finished
protected T	nextValue
private java.lang.Class<T>	type
private java.util.Iterator<?>	values

Constructor Summary

Constructors

Constructor and Description
LazyMatchingTypeIterator(java.util.Iterator<?> values, java.lang.Class<T> type)

Method Summary

Modifier and Type	Method and Description
java.lang.Class<T>	getType()
java.util.Iterator<?>	getValues()
boolean	hasNext()
static <T> java.util.Iterator<T>	lazySelectMatchingTypes(java.util.Iterator<?> values, java.lang.Class<T> type)
T	next()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Field Detail

finished

protected boolean finished

nextValue

protected T nextValue

values

private final java.util.Iterator<?> values

type

private final java.lang.Class<T> type

Constructor Detail

LazyMatchingTypeIterator

public LazyMatchingTypeIterator(java.util.Iterator<?> values,
                                java.lang.Class<T> type)

Method Detail

getValues

public java.util.Iterator<?> getValues()

getType

public java.lang.Class<T> getType()

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>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

lazySelectMatchingTypes

public static <T> java.util.Iterator<T> lazySelectMatchingTypes(java.util.Iterator<?> values,
                                                                java.lang.Class<T> type)

Type Parameters:

T - Type if iterated element

Parameters:

values - The source values - ignored if null

type - The (never @code null) type of values to select - any value whose type is assignable to this type will be selected by the iterator.

Returns:

An Iterator whose next() call selects only values matching the specific type. Note: the matching values are not pre-calculated (hence the "lazy" denomination) - i.e., the match is performed only when Iterator.hasNext() is called.