com.google.visualization.datasource.datatable
Class ColumnDescription

java.lang.Object
  com.google.visualization.datasource.datatable.ColumnDescription

public class ColumnDescription
extends Object

Holds all the information we keep for a single column in a DataTable. This does not include all the values, which are kept in TableCells. The information that is included is:

• Data type (see ValueType)
• Id - used mainly for referencing columns in queries (see Query))
• Label - used mainly for display purposes
• Custom properties - can be used for any purpose.

Author:

Yoah B.D.

Constructor Summary

ColumnDescription(String id, ValueType type, String label)
Creates a new column description.

Method Summary

ColumnDescription	clone() Returns a clone of the ColumnDescription, meaning a column descriptor with the exact same properties.
Map<String,String>	getCustomProperties() Returns an immutable map of the custom properties.
String	getCustomProperty(String key) Retrieves a custom property.
String	getId() Returns the column id.
String	getLabel() Returns the column label.
String	getPattern() Returns the column pattern.
ValueType	getType() Returns the column type.
void	setCustomProperty(String propertyKey, String propertyValue) Sets a custom property.
void	setLabel(String label) Sets a column label.
void	setPattern(String pattern) Sets a column pattern.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnDescription

public ColumnDescription(String id,
                         ValueType type,
                         String label)

Creates a new column description.

Parameters:

id - The column's identifier.

type - The column's data type.

label - The column's displayed name (label).

Method Detail

getId

public String getId()

Returns the column id.

Returns:

The column id.

getType

public ValueType getType()

Returns the column type.

Returns:

The column type.

getLabel

public String getLabel()

Returns the column label.

Returns:

The column label.

getPattern

public String getPattern()

Returns the column pattern.

Returns:

The column pattern.

setPattern

public void setPattern(String pattern)

Sets a column pattern.

Parameters:

pattern - A pattern to set for this column.

setLabel

public void setLabel(String label)

Sets a column label.

Parameters:

label - A label to set for this column.

getCustomProperty

public String getCustomProperty(String key)

Retrieves a custom property. Returns null if it does not exist.

Parameters:

key - The property key.

Returns:

The property value, or null if it does not exist.

setCustomProperty

public void setCustomProperty(String propertyKey,
                              String propertyValue)

Sets a custom property.

Parameters:

propertyKey - The property key.

propertyValue - The property value.

getCustomProperties

public Map<String,String> getCustomProperties()

Returns an immutable map of the custom properties.

Returns:

An immutable map of the custom properties.

clone

public ColumnDescription clone()

Returns a clone of the ColumnDescription, meaning a column descriptor with the exact same properties. This is a deep clone as it copies all custom properties.

Overrides:

clone in class Object

Returns:

The cloned ColumnDescription.