org.knime.core.data.container
Class BlobSupportDataRow

java.lang.Object
  org.knime.core.data.container.BlobSupportDataRow

All Implemented Interfaces:

Iterable<DataCell>, DataRow

public final class BlobSupportDataRow
extends Object
implements DataRow

Special row implementation that supports to access the wrapper cells of BlobDataCell. Dealing with the wrapper cells (BlobWrapperDataCell) gives the benefit that blobs are not read from the file when passed from one place to another (they will be read on access).

Author:

Bernd Wiswedel, University of Konstanz

Constructor Summary

BlobSupportDataRow(RowKey key, DataCell[] cells)

BlobSupportDataRow(RowKey key, DataRow oldRow)
Creates a new data row with a new row ID.

BlobSupportDataRow(String id, DataRow oldRow)
Creates a new data row with a new row ID.

Method Summary

DataCell	getCell(int index) If the cell at index is a blob wrapper cell, it will fetch the content and return it.
RowKey	getKey() Returns the row key.
int	getNumCells() Returns the length of this row, that is the number of columns of the DataTable (not including the row key).
DataCell	getRawCell(int index) Returns the cell at given index.
Iterator<DataCell>	iterator()
String	toString() Get a string representing this row, i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

BlobSupportDataRow

public BlobSupportDataRow(RowKey key,
                          DataCell[] cells)

Parameters:

key - Row key

cells - cell array.

BlobSupportDataRow

public BlobSupportDataRow(RowKey key,
                          DataRow oldRow)

Creates a new data row with a new row ID.

Parameters:

key - the key with the new row ID

oldRow - container of the cells for the new row

BlobSupportDataRow

public BlobSupportDataRow(String id,
                          DataRow oldRow)

Creates a new data row with a new row ID.

Parameters:

id - the new row ID

oldRow - container of the cells for the new row

Method Detail

getCell

public DataCell getCell(int index)

If the cell at index is a blob wrapper cell, it will fetch the content and return it. Returns the DataCell at the provided index within this row.

Specified by:

getCell in interface DataRow

Parameters:

index - the index of the cell to retrieve (indices start from 0)

Returns:

the DataCell at the given index

getRawCell

public DataCell getRawCell(int index)

Returns the cell at given index. Returns the wrapper cell (if any).

Parameters:

index - Cell index.

Returns:

Raw cell.

getKey

public RowKey getKey()

Returns the row key.

Specified by:

getKey in interface DataRow

Returns:

the row key

getNumCells

public int getNumCells()

Returns the length of this row, that is the number of columns of the DataTable (not including the row key).

Specified by:

getNumCells in interface DataRow

Returns:

length of this row

iterator

public Iterator<DataCell> iterator()

Specified by:

iterator in interface Iterable<DataCell>

toString

public String toString()

Get a string representing this row, i.e. "rowkey: (cell1, ..., celln)"

Overrides:

toString in class Object

Returns:

key + values of this row in a string