public class PositionIterator extends java.lang.Object implements java.util.Iterator<Position>
Position
instances, that is wrapped around
another 'parent' Iterator
. The parent can be either another
PositionIterator
, or an iterator over KnuthElement
s,
for example.next()
method always returns a Position
. The
getPos(Object)
method can be overridden in subclasses
to take care of obtaining the LayoutManager
or Position
from the object returned by the parent iterator's next()
method.Constructor and Description |
---|
PositionIterator(java.util.Iterator parentIter)
Construct position iterator.
|
Modifier and Type | Method and Description |
---|---|
protected boolean |
checkNext() |
protected void |
endIter()
end (reset) iterator
|
protected LayoutManager |
getLM(java.lang.Object nextObj) |
LayoutManager |
getNextChildLM() |
protected Position |
getPos(java.lang.Object nextObj)
Default implementation assumes that the passed
nextObj is itself a Position , and just returns it. |
boolean |
hasNext() |
Position |
next() |
java.lang.Object |
peekNext() |
void |
remove() |
public PositionIterator(java.util.Iterator parentIter)
parentIter
- an iterator to use as parentpublic LayoutManager getNextChildLM()
protected LayoutManager getLM(java.lang.Object nextObj)
nextObj
- next object from which to obtain positionprotected Position getPos(java.lang.Object nextObj)
nextObj
is itself a Position
, and just returns it.
Subclasses for which this is not the case, must provide a
suitable override this method.nextObj
- next object from which to obtain positionprotected boolean checkNext()
protected void endIter()
public boolean hasNext()
hasNext
in interface java.util.Iterator<Position>
public Position next() throws java.util.NoSuchElementException
next
in interface java.util.Iterator<Position>
java.util.NoSuchElementException
public java.lang.Object peekNext()
public void remove() throws java.lang.UnsupportedOperationException
remove
in interface java.util.Iterator<Position>
java.lang.UnsupportedOperationException
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