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java.lang.Objectorg.axiondb.engine.rowiterators.DelegatingRowIterator
org.axiondb.engine.rowiterators.AbstractFilteringRowIterator
public abstract class AbstractFilteringRowIterator
Constructor Summary | |
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AbstractFilteringRowIterator(RowIterator iterator)
|
Method Summary | |
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void |
add(Row row)
Not supported in this base implementation. |
protected void |
clearNextRow()
|
protected void |
clearPreviousRow()
|
Row |
current()
Returns the last Row returned by me (by RowIterator.next() ,RowIterator.previous() ,
RowIterator.first() ,RowIterator.last() , etc.). |
int |
currentIndex()
Returns the index of the RowIterator.current() row, if any. |
protected abstract boolean |
determineNextRow()
|
protected abstract boolean |
determinePreviousRow()
|
Row |
first()
Returns the first Row in the list, positioning the cursor to just before
the first Row in the list. |
boolean |
hasCurrent()
Returns true if I have a current Row . |
boolean |
hasNext()
Returns true if I have more Row s when traversing the list
in the forward direction. |
boolean |
hasPrevious()
Returns true if I have more Row s when traversing the list
in the reverse direction. |
protected boolean |
isNextAvailable()
|
protected boolean |
isPreviousAvailable()
|
Row |
last()
Returns the last Row in the list, positioning the cursor to just after the
last Row in the list. |
Row |
next()
Returns the next Row in the list, or throws
NoSuchElementException if no next Row exists. |
int |
nextIndex()
Returns the index of the RowIterator.next() row, if any, or the number of elements is
the iterator if we've reached the end. |
Row |
peekNext()
Return the value that would be returned by a call to RowIterator.next() , if any, but
don't update my position. |
Row |
peekPrevious()
Return the value that would be returned by a call to RowIterator.previous() , if any,
but don't update my position. |
Row |
previous()
Returns the previous Row in the list, or throws
NoSuchElementException if no next Row exists. |
int |
previousIndex()
Returns the index of the RowIterator.previous() row, if any, or -1 if we're add the
beginning of the list. |
void |
remove()
Set the Row at the current position in my underlying collection, or throw
UnsupportedOperationException . |
void |
reset()
Re-initialize this RowIterator to its initial state (positioned just
before the first Row in the list). |
void |
set(Row row)
Set the Row at the current position in my underlying collection, or throw
UnsupportedOperationException . |
protected void |
setNext(Row row)
|
protected void |
setPrevious(Row row)
|
Methods inherited from class org.axiondb.engine.rowiterators.DelegatingRowIterator |
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getDelegate, isEmpty, setDelegate |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public AbstractFilteringRowIterator(RowIterator iterator)
Method Detail |
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protected abstract boolean determineNextRow() throws AxionException
AxionException
protected abstract boolean determinePreviousRow() throws AxionException
AxionException
public Row current()
RowIterator
Row
returned by me (by RowIterator.next()
,RowIterator.previous()
,
RowIterator.first()
,RowIterator.last()
, etc.).
current
in interface RowIterator
current
in class DelegatingRowIterator
public int currentIndex()
RowIterator
RowIterator.current()
row, if any.
currentIndex
in interface RowIterator
currentIndex
in class DelegatingRowIterator
public boolean hasCurrent()
RowIterator
true
if I have a current Row
. (In other words,
returns true
iff RowIterator.current()
would return a Row
rather
than throwing an exception.)
hasCurrent
in interface RowIterator
hasCurrent
in class DelegatingRowIterator
public void add(Row row) throws AxionException
add
in interface RowIterator
add
in class DelegatingRowIterator
AxionException
public boolean hasNext()
RowIterator
true
if I have more Row
s when traversing the list
in the forward direction. (In other words, returns true
iff
RowIterator.next()
would return a Row
rather than throwing an exception.)
hasNext
in interface RowIterator
hasNext
in class DelegatingRowIterator
public boolean hasPrevious()
RowIterator
true
if I have more Row
s when traversing the list
in the reverse direction. (In other words, returns true
iff
RowIterator.previous()
would return a Row
rather than throwing an exception.)
hasPrevious
in interface RowIterator
hasPrevious
in class DelegatingRowIterator
public Row next() throws AxionException
RowIterator
Row
in the list, or throws
NoSuchElementException
if no next Row
exists.
next
in interface RowIterator
next
in class DelegatingRowIterator
AxionException
- when a problem occurs accessing the Row
public int nextIndex()
RowIterator
RowIterator.next()
row, if any, or the number of elements is
the iterator if we've reached the end.
nextIndex
in interface RowIterator
nextIndex
in class DelegatingRowIterator
public Row previous() throws AxionException
RowIterator
Row
in the list, or throws
NoSuchElementException
if no next Row
exists.
previous
in interface RowIterator
previous
in class DelegatingRowIterator
AxionException
- when a problem occurs accessing the Row
public int previousIndex()
RowIterator
RowIterator.previous()
row, if any, or -1 if we're add the
beginning of the list.
previousIndex
in interface RowIterator
previousIndex
in class DelegatingRowIterator
public void remove() throws AxionException
RowIterator
Row
at the current position in my underlying collection, or throw
UnsupportedOperationException
. (Optional operation.)
remove
in interface RowIterator
remove
in class DelegatingRowIterator
AxionException
public void set(Row row) throws AxionException
RowIterator
Row
at the current position in my underlying collection, or throw
UnsupportedOperationException
. (Optional operation.)
set
in interface RowIterator
set
in class DelegatingRowIterator
AxionException
public void reset() throws AxionException
RowIterator
RowIterator
to its initial state (positioned just
before the first Row
in the list).
reset
in interface RowIterator
reset
in class DelegatingRowIterator
AxionException
public Row first() throws AxionException
RowIterator
Row
in the list, positioning the cursor to just before
the first Row
in the list. (In other words, after first
is
called both RowIterator.next()
and RowIterator.current()
will return the first row in the
list.)
first
in interface RowIterator
first
in class DelegatingRowIterator
AxionException
- when a problem occurs accessing the Row
public Row last() throws AxionException
RowIterator
Row
in the list, positioning the cursor to just after the
last Row
in the list. (In other words, after last
is called
both RowIterator.previous()
and RowIterator.current()
will return the last row in the list.)
last
in interface RowIterator
last
in class DelegatingRowIterator
AxionException
- when a problem occurs accessing the Row
public Row peekNext() throws AxionException
RowIterator
RowIterator.next()
, if any, but
don't update my position.
peekNext
in interface RowIterator
peekNext
in class DelegatingRowIterator
AxionException
- when a problem occurs accessing the Row
public Row peekPrevious() throws AxionException
RowIterator
RowIterator.previous()
, if any,
but don't update my position.
peekPrevious
in interface RowIterator
peekPrevious
in class DelegatingRowIterator
AxionException
- when a problem occurs accessing the Row
protected void setNext(Row row)
protected void clearNextRow()
protected void setPrevious(Row row)
protected void clearPreviousRow()
protected boolean isNextAvailable()
protected boolean isPreviousAvailable()
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