T
- Type of iterated elementpublic class LazyMatchingTypeIterator<T>
extends java.lang.Object
implements java.util.Iterator<T>
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 calledModifier and Type | Field and Description |
---|---|
protected boolean |
finished |
protected T |
nextValue |
private java.lang.Class<T> |
type |
private java.util.Iterator<?> |
values |
Constructor and Description |
---|
LazyMatchingTypeIterator(java.util.Iterator<?> values,
java.lang.Class<T> type) |
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() |
protected boolean finished
protected T nextValue
private final java.util.Iterator<?> values
private final java.lang.Class<T> type
public LazyMatchingTypeIterator(java.util.Iterator<?> values, java.lang.Class<T> type)
public java.util.Iterator<?> getValues()
public java.lang.Class<T> getType()
public boolean hasNext()
hasNext
in interface java.util.Iterator<T>
public java.lang.String toString()
toString
in class java.lang.Object
public static <T> java.util.Iterator<T> lazySelectMatchingTypes(java.util.Iterator<?> values, java.lang.Class<T> type)
T
- Type if iterated elementvalues
- 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.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.