Class ConvertingIteration<S,T>
java.lang.Object
org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<T>
org.eclipse.rdf4j.common.iteration.ConvertingIteration<S,T>
- All Implemented Interfaces:
AutoCloseable
,Iterator<T>
,CloseableIteration<T>
- Direct Known Subclasses:
BoundJoinConversionIteration
,BoundJoinVALUESConversionIteration
,ExtensionIterator
,GroupedCheckConversionIteration
,InsertBindingsIteration
,ProjectionIterator
,ServiceJoinConversionIteration
A CloseableIteration that converts an iteration over objects of type S (the source type) to an iteration
over objects of type T (the target type).
-
Constructor Summary
ModifierConstructorDescriptionprotected
ConvertingIteration
(CloseableIteration<? extends S> iter) Creates a new ConvertingIteration that operates on the supplied source type iteration. -
Method Summary
Modifier and TypeMethodDescriptionprotected abstract T
Converts a source type object to a target type object.protected void
Closes this iteration as well as the wrapped iteration if it is aCloseableIteration
.final boolean
hasNext()
Checks whether the source type iteration contains more elements.final T
next()
Returns the next element from the source type iteration.final void
remove()
Calls remove() on the underlying Iteration.Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
stream
Methods inherited from interface java.util.Iterator
forEachRemaining
-
Constructor Details
-
ConvertingIteration
Creates a new ConvertingIteration that operates on the supplied source type iteration.- Parameters:
iter
- The source type iteration for this ConvertingIteration, must not be null.
-
-
Method Details
-
convert
-
hasNext
public final boolean hasNext()Checks whether the source type iteration contains more elements.- Returns:
- true if the source type iteration contains more elements, false otherwise.
-
next
Returns the next element from the source type iteration.- Throws:
NoSuchElementException
- If all elements have been returned.IllegalStateException
- If the iteration has been closed.
-
remove
public final void remove()Calls remove() on the underlying Iteration.- Throws:
UnsupportedOperationException
- If the wrapped Iteration does not support the remove operation.IllegalStateException
- If the Iteration has been closed, or ifnext()
has not yet been called, orremove()
has already been called after the last call tonext()
.
-
handleClose
protected void handleClose()Closes this iteration as well as the wrapped iteration if it is aCloseableIteration
.- Specified by:
handleClose
in classAbstractCloseableIteration<T>
-