org.knime.core.data.util
Class ObjectToDataCellConverter

java.lang.Object
  org.knime.core.data.util.ObjectToDataCellConverter

Deprecated. This class is obsolete as the class DefaultTable is deprecated. DataCell objects should be created using their respective constructor rather than using an ObjectToDataCellConverter.

public class ObjectToDataCellConverter
extends Object

Factory to get DataCell representation for various (java-)objects.

This class is used within the DefaultTable to wrap java objects in DataCell. If you implement your own DataCell and use the DefaultTable, you probably want to override this class.

This default implementation serves to get DataCell instances for basic java objects like String, Integer, Double and their generic types like int, byte, double etc.

To implement additional functionality, you usually override the proper createDataCell method like this:

 ObjectToDataCellConverter converter = new ObjectToDataCellConverter() {
     public DataCell createDataCell(final Object o) {
         if (o instanceof FooObject) {
             return new FooDataCell((FooObject)o);
         }
         if (o instanceof FooBarObject) {
             return new FooBarDataCell((FooBarObject)o);
         }
         return super.createDataCell(o);
     }
 };
 

It is also up to the user to implement further handling in the factory method for generic data types.

Author:

Bernd Wiswedel, University of Konstanz

See Also:

DefaultTable.DefaultTable( Object[][], String[], String[], ObjectToDataCellConverter)

Field Summary

static ObjectToDataCellConverter

INSTANCE Deprecated. Singleton to be used for default handling.

Constructor Summary

ObjectToDataCellConverter()
Deprecated.

Method Summary

DataCell	createDataCell(boolean b) Deprecated. Creates new IntCell for a boolean having value 1 if b==true or 0 if b==false.
DataCell	createDataCell(byte b) Deprecated. Creates new IntCell for a byte.
DataCell	createDataCell(double d) Deprecated. Creates new DoubleCell for a double.
DataCell	createDataCell(float f) Deprecated. Creates new DoubleCell for a float.
DataCell	createDataCell(int i) Deprecated. Creates new IntCell for an int.
DataCell	createDataCell(Object o) Deprecated. Factory method to get DataCells from basic types.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ObjectToDataCellConverter INSTANCE

Deprecated.

Singleton to be used for default handling. This convenience object may be used when default handling is sufficient.

Constructor Detail

ObjectToDataCellConverter

public ObjectToDataCellConverter()

Deprecated.

Method Detail

createDataCell

public DataCell createDataCell(Object o)

Deprecated.

Factory method to get DataCells from basic types. This implementation creates DataCells depending on the class type of o as follows:

Class or value of o	Return class
null	StringCell.INSTANCE
String	StringCell
Integer	IntCell
Byte	IntCell
Double	DoubleCell
Float	DoubleCell

Parameters:

o - The object to be converted into a DataCell or null to indicate a missing value.

Returns:

a new DataCell representing o.

Throws:

IllegalArgumentException - if o is not an instance of the classes mentioned above. Derivates may override this behavior.

createDataCell

public DataCell createDataCell(double d)

Deprecated.

Creates new DoubleCell for a double.

Parameters:

d - Double to be wrapped in a DataCell

Returns:

new DoubleCell(d);

See Also:

DoubleCell

createDataCell

public DataCell createDataCell(float f)

Deprecated.

Creates new DoubleCell for a float.

Parameters:

f - Float to be wrapped in a DataCell

Returns:

new DoubleCell((double)f);

See Also:

DoubleCell

createDataCell

public DataCell createDataCell(int i)

Deprecated.

Creates new IntCell for an int.

Parameters:

i - Int to be wrapped in a DataCell

Returns:

new IntCell(i);

See Also:

IntCell

createDataCell

public DataCell createDataCell(byte b)

Deprecated.

Creates new IntCell for a byte.

Parameters:

b - Byte to be wrapped in a DataCell

Returns:

new IntCell((int)b);

See Also:

IntCell

createDataCell

public DataCell createDataCell(boolean b)

Deprecated.

Creates new IntCell for a boolean having value 1 if b==true or 0 if b==false.

Parameters:

b - Boolean to be wrapped in a DataCell

Returns:

A new IntCell having either value 1 or 0 depending on b

See Also:

IntCell