org.knime.core.data.def
Class StringCell

java.lang.Object
  org.knime.core.data.DataCell
      org.knime.core.data.def.StringCell

All Implemented Interfaces:

Serializable, DataValue, NominalValue, StringValue

public final class StringCell
extends DataCell
implements StringValue, NominalValue

A data cell implementation holding a string value by storing this value in a private String member.

Author:

Michael Berthold, University of Konstanz

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.knime.core.data.StringValue

StringValue.StringUtilityFactory

Nested classes/interfaces inherited from interface org.knime.core.data.DataValue

DataValue.UtilityFactory

Field Summary

static DataType

TYPE Convenience access member for DataType.getType(StringCell.class).

Fields inherited from interface org.knime.core.data.StringValue

UTILITY

Fields inherited from interface org.knime.core.data.NominalValue

UTILITY

Constructor Summary

StringCell(String str)
Creates a new String Cell based on the given String value.

Method Summary

protected boolean	equalsDataCell(DataCell dc) Derived classes implement their specific equals function here.
static org.knime.core.data.def.StringCell.StringSerializer	getCellSerializer() Returns the factory to read/write DataCells of this class from/to a DataInput/DataOutput.
static Class<? extends DataValue>	getPreferredValueClass() Returns the preferred value class of this cell implementation.
String	getStringValue()
int	hashCode() This method must be implemented in order to ensure that two equal DataCell objects return the same hash code.
String	toString() Returns the String representation of this cell's value.

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

equals, getType, isMissing

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final DataType TYPE

Convenience access member for DataType.getType(StringCell.class).

See Also:

DataType.getType(Class)

Constructor Detail

StringCell

public StringCell(String str)

Creates a new String Cell based on the given String value.

Parameters:

str - The String value to store.

Throws:

NullPointerException - If the given String value is null.

Method Detail

getPreferredValueClass

public static final Class<? extends DataValue> getPreferredValueClass()

Returns the preferred value class of this cell implementation. This method is called per reflection to determine which is the preferred renderer, comparator, etc.

Returns:

StringValue.class;

getCellSerializer

public static final org.knime.core.data.def.StringCell.StringSerializer getCellSerializer()

Returns the factory to read/write DataCells of this class from/to a DataInput/DataOutput. This method is called via reflection.

Returns:

A serializer for reading/writing cells of this kind.

See Also:

DataCell

getStringValue

public String getStringValue()

Specified by:

getStringValue in interface StringValue

Returns:

A String value.

toString

public String toString()

Returns the String representation of this cell's value.

Specified by:

toString in class DataCell

Returns:

a String representation of this cell's value

equalsDataCell

protected boolean equalsDataCell(DataCell dc)

Derived classes implement their specific equals function here. The argument is guaranteed to be not null or a missing value, to be of the same class like this.

Specified by:

equalsDataCell in class DataCell

Parameters:

dc - the cell to compare this to

Returns:

true if this is equal to the argument, false if not

hashCode

public int hashCode()

This method must be implemented in order to ensure that two equal DataCell objects return the same hash code.

Specified by:

hashCode in class DataCell

Returns:

the hash code of your specific DataCell

See Also:

Object.hashCode(), DataCell.equals(java.lang.Object)