org.knime.core.data.collection
Class BlobSupportDataCellSet

java.lang.Object
  org.knime.core.data.collection.BlobSupportDataCellSet

All Implemented Interfaces:

Serializable, Iterable<DataCell>

public class BlobSupportDataCellSet
extends Object
implements Iterable<DataCell>, Serializable

A list of DataCell objects, which special treatment for BlobDataCell. The implementation will keep blobs in special BlobWrapperDataCell in order to allow for a possible garbage collection (and deserializing when a blob is accessed.)

Author:

ohl, University of Konstanz

See Also:

Serialized Form

Constructor Summary

BlobSupportDataCellSet(Collection<? extends DataCell> cells)
Rather use one of the factory methods to create a new set.

Method Summary

boolean	contains(DataCell cell) Returns true if the set contains the specified cell.
boolean	containsBlobWrapperCells()
static BlobSupportDataCellSet	create(Collection<? extends DataCell> coll) Factory method to create a set of data cells based on a collection.
static BlobSupportDataCellSet	create(DataRow row, int[] cols) Create new set containing selected cells from a DataRow.
static BlobSupportDataCellSet	deserialize(DataCellDataInput input) Static deserializer for a datacell set.
boolean	equals(Object obj)
DataType	getElementType()
int	hashCode()
Iterator<DataCell>	iterator()
void	serialize(DataCellDataOutput output) Write this object to an output.
int	size() Returns the number of currently stored elements.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BlobSupportDataCellSet

BlobSupportDataCellSet(Collection<? extends DataCell> cells)

Rather use one of the factory methods to create a new set.

Parameters:

cells - to be stored in the new set.

Method Detail

create

public static BlobSupportDataCellSet create(Collection<? extends DataCell> coll)

Factory method to create a set of data cells based on a collection.

If the underlying collection stems from a DataRow (as read from a any table), consider using create(DataRow, int[]) in order to minimize cell access.

Parameters:

coll - The underlying collection to take the cells from .

Returns:

The newly created set.

Throws:

NullPointerException - If the argument is null or contains null elements.

create

public static BlobSupportDataCellSet create(DataRow row,
                                            int[] cols)

Create new set containing selected cells from a DataRow. Using this method will check if the row is returned by a BufferedDataTable and will handle blobs appropriately.

Parameters:

row - The underlying row

cols - The indices of the cells to store in the set

Returns:

A newly created set.

Throws:

NullPointerException - If either argument is null.

IndexOutOfBoundsException - If the indices are invalid.

contains

public boolean contains(DataCell cell)

Returns true if the set contains the specified cell.

Parameters:

cell - the cell to check for

Returns:

true if the set contains the specified cell.

iterator

public Iterator<DataCell> iterator()

Specified by:

iterator in interface Iterable<DataCell>

containsBlobWrapperCells

public boolean containsBlobWrapperCells()

Returns:

true, if at least one of the stored cells is a blob cell

getElementType

public DataType getElementType()

Returns:

the elements' common super type

size

public int size()

Returns the number of currently stored elements. If the set contains more cells than Integer.MAX_VALUE, it returns Integer.MAX_VALUE (see Set.size().

Returns:

the number of currently stored elements

serialize

public void serialize(DataCellDataOutput output)
               throws IOException

Write this object to an output.

Parameters:

output - To write to.

Throws:

IOException - If that fails.

deserialize

public static BlobSupportDataCellSet deserialize(DataCellDataInput input)
                                          throws IOException

Static deserializer for a datacell set.

Parameters:

input - To read from.

Returns:

A newly created set.

Throws:

IOException - If that fails

See Also:

DataCellSerializer.deserialize(DataCellDataInput)

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object