org.knime.base.data.filter.column
Class CloseableFilterColumnRowIterator

java.lang.Object
  org.knime.core.data.RowIterator
      org.knime.core.data.container.CloseableRowIterator
          org.knime.base.data.filter.column.CloseableFilterColumnRowIterator

All Implemented Interfaces:

Iterator<DataRow>

final class CloseableFilterColumnRowIterator
extends CloseableRowIterator

Filter column row iterator needed to wrap the filter column's original row iterator. In contrast to the FilterColumnRowIterator this iterator is closeable.

Author:

Thomas Gabriel, University of Konstanz, Thorsten Meinl, University of Konstanz

See Also:

FilterColumnTable

Constructor Summary

CloseableFilterColumnRowIterator(CloseableRowIterator it, int[] columns)
Creates a new filter iterator using the original row iterator and an array of column indices.

Method Summary

void	close() Closes this iterator.
boolean	hasNext() Returns true if there are more rows and false otherwise.
DataRow	next() Returns the next DataRow.

Methods inherited from class org.knime.core.data.RowIterator

remove

Methods inherited from class java.lang.Object

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

Constructor Detail

CloseableFilterColumnRowIterator

CloseableFilterColumnRowIterator(CloseableRowIterator it,
                                 int[] columns)

Creates a new filter iterator using the original row iterator and an array of column indices.

Parameters:

it - the original row iterator

columns - an array of column indices

Method Detail

hasNext

public boolean hasNext()

Returns true if there are more rows and false otherwise.

Specified by:

hasNext in interface Iterator<DataRow>

Specified by:

hasNext in class RowIterator

Returns:

true if the iterator has more elements, otherwise false

See Also:

RowIterator.next()

next

public DataRow next()

Returns the next DataRow.

Specified by:

next in interface Iterator<DataRow>

Specified by:

next in class RowIterator

Returns:

the next row in the DataTable

close

public void close()

Closes this iterator. Subsequent calls of RowIterator.hasNext() will return false. This method does not need to be called if the iterator was pushed to the end (stream will be closed automatically). It's meant to be used in cases where the iterator might not advance to the end of the table.

This method does nothing if the table is already closed (multiple invocations are ignored).

Specified by:

close in class CloseableRowIterator